265 results on '"John N, Nkengasong"'
Search Results
2. Adherence to COVID-19 preventive measures in Sub-Saharan Africa during the 1st year of the pandemic: Pooled analysis of the International Citizen Project on COVID-19 (ICPCovid) surveys
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Leonard Ngarka, Joseph Nelson Siewe Fodjo, Wepnyu Yembe Njamnshi, John D. Ditekemena, Mohammed A. M. Ahmed, Rhoda K. Wanyenze, Janet Dula, Philippe Sessou, Christian T. Happi, John N. Nkengasong, Robert Colebunders, and Alfred K. Njamnshi
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COVID-19 ,Sub-Saharan Africa ,barrier measures ,adherence score ,prevention ,Public aspects of medicine ,RA1-1270 - Abstract
IntroductionWhile most governments instituted several interventions to stall the spread of COVID-19, little is known regarding the continued observance of the non-pharmaceutical COVID-19 preventive measures particularly in Sub-Saharan Africa (SSA). We investigated adherence to these preventive measures during the initial 6 months of the COVID-19 outbreak in some SSA countries.MethodsBetween March and August 2020, the International Citizen Project on COVID-19 consortium (www.icpcovid.com) conducted online surveys in six SSA countries: Benin, Cameroon, Democratic Republic of Congo, Mozambique, Somalia, and Uganda. A five-point individual adherence score was constituted by scoring respondents' observance of the following measures: mask use, physical distancing, hand hygiene, coughing hygiene, and avoiding to touch one's face. Community behaviors (going to public places, traveling during the pandemic) were also assessed. Data were analyzed in two time periods: Period 1 (March-May) and Period 2 (June-August).ResultsResponses from 26,678 respondents were analyzed (mean age: 31.0 ± 11.1 years; 54.1% males). Mean individual adherence score decreased from 3.80 ± 1.37 during Period 1, to 3.57 ± 1.43 during Period 2; p < 0.001. At the community level, public events/places were significantly more attended with increased travels during Period 2 compared to Period 1 (p < 0.001). Using linear mixed models, predictors of increased individual adherence included: higher age (Coef = 0.005; 95% CI: 0.003–0.007), female gender (Coef = 0.071; 95% CI: 0.039–0.104), higher educational level (Coef = 0.999; 95% CI: 0.885–1.113), and working in the healthcare sector (Coef = 0.418; 95% CI: 0.380–0.456).ConclusionDecreasing adherence to non-pharmaceutical measures over time constitutes a risk for the persistence of COVID-19 in SSA. Younger persons and those with lower education levels constitute target groups for improving adherence to such measures.
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- 2022
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3. Fear and depression during the COVID-19 outbreak in Cameroon: a nation-wide observational study
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Joseph Nelson Siewe Fodjo, Leonard Ngarka, Wepnyu Y. Njamnshi, Leonard N. Nfor, Michel K. Mengnjo, Edwige Laure Mendo, Samuel A. Angwafor, Jonas Guy Atchou Basseguin, Cyrille Nkouonlack, Edith N. Njit, Nene Ahidjo, Eric S. Chokote, Fidèle Dema, Julius Y. Fonsah, Godwin Y. Tatah, Nancy Palmer, Paul F. Seke Etet, Dennis Palmer, Dickson S. Nsagha, Daniel E. Etya’ale, Stephen Perrig, Roman Sztajzel, Jean-Marie Annoni, Anne-Cécile Zoung-Kanyi Bissek, Rose G. F. Leke, Marie-Thérèse Abena Ondoa Obama, John N. Nkengasong, Robert Colebunders, and Alfred K. Njamnshi
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COVID-19 ,PHQ-9 ,FCV-19S ,Cameroon ,Fear ,Depression ,Psychiatry ,RC435-571 - Abstract
Abstract Background The COVID-19 pandemic has been associated with significant psychological and social distress worldwide. We investigated fear and depression among adults in Cameroon during different phases of the COVID-19 outbreak. Methods An online survey was conducted in Cameroon from June–December 2020 using a structured questionnaire. Socio-demographic data and information regarding COVID-19 history were obtained. Fear and depressive symptoms were assessed using the Fear of COVID-19 score (FCV-19S) and the Patient Health Questionnaire (PHQ-9), respectively. Responses were clustered in weeks to better appreciate their evolution over time. Results Overall, 7381 responses from all ten regions of Cameroon were analysed (median age: 30 years, 73.3% male). The prevalence of depression (PHQ-9 score ≥ 10) was 8.4%, and that of high fear of COVID-19 (FCV-19S scores ≥19) was 57.4%. These rates were similar across genders, age-groups, and region of residence. While mean weekly PHQ-9 scores remained fairly stable throughout the study period (range: 2.53–3.21; p = 0.101), mean FCV-19S scores were highest during the early weeks but decreased significantly thereafter (from 20.31 to 18.34; p
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- 2021
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4. Leveraging gains from African Center for Integrated Laboratory Training to combat HIV epidemic in sub-Saharan Africa
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Ritu Shrivastava, Richard Poxon, Erin Rottinghaus, Leyya Essop, Victoria Sanon, Zawadi Chipeta, Elsie van-Schalkwyk, Phuti Sekwadi, Pelagia Murangandi, Shon Nguyen, Josh Devos, Shanna Nesby-Odell, Thomas Stevens, Farouk Umaru, Alex Cox, Andrea Kim, Chunfu Yang, Linda M. Parsons, Babatyi Malope-Kgokong, and John N. Nkengasong
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Laboratory system strengthening ,Health worker training ,Training assessment ,Training effectiveness ,Kirkpatrick model ,Quality of testing ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background In sub-Saharan Africa, there is dearth of trained laboratorians and strengthened laboratory systems to provide adequate and quality laboratory services for enhanced HIV control. In response to this challenge, in 2007, the African Centre for Integrated Laboratory Training (ACILT) was established in South Africa with a mission to train staffs from countries with high burdens of diseases in skills needed to strengthen sustainable laboratory systems. This study was undertaken to assess the transference of newly gained knowledge and skills to other laboratory staff, and to identify enabling and obstructive factors to their implementation. Methods We used Kirkpatrick model to determine training effectiveness by assessing the transference of newly gained knowledge and skills to participant’s work environment, along with measuring enabling and obstructive factors. In addition to regular course evaluations at ACILT (pre and post training), in 2015 we sent e-questionnaires to 867 participants in 43 countries for course participation between 2008 and 2014. Diagnostics courses included Viral Load, and systems strengthening included strategic planning and Biosafety and Biosecurity. SAS v9.44 and Excel were used to analyze retrospective de-identified data collected at six months pre and post-training. Results Of the 867 participants, 203 (23.4%) responded and reported average improvements in accuracy and timeliness in Viral Load programs and to systems strengthening. For Viral Load testing, frequency of corrective action for unsatisfactory proficiency scores improved from 57 to 91%, testing error rates reduced from 12.9% to 4.9%; 88% responders contributed to the first national strategic plan development and 91% developed strategies to mitigate biosafety risks in their institutions. Key enabling factors were team and management support, and key obstructive factors included insufficient resources and staff’s resistance to change. Conclusions Training at ACILT had a documented positive impact on strengthening the laboratory capacity and laboratory workforce and substantial cost savings. ACILT’s investment produced a multiplier effect whereby national laboratory systems, personnel and leadership reaped training benefits. This laboratory training centre with a global clientele contributed to improve existing laboratory services, systems and networks for the HIV epidemic and is now being leveraged for COVID-19 testing that has infected 41,332,899 people globally.
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- 2021
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5. Mapping male circumcision for HIV prevention efforts in sub-Saharan Africa
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Michael A. Cork, Kate F. Wilson, Samantha Perkins, Michael L. Collison, Aniruddha Deshpande, Jeffrey W. Eaton, Lucas Earl, Emily Haeuser, Jessica E. Justman, Damaris K. Kinyoki, Benjamin K. Mayala, Jonathan F. Mosser, Christopher J. L. Murray, John N. Nkengasong, Peter Piot, Benn Sartorius, Lauren E. Schaeffer, Audrey L. Serfes, Amber Sligar, Krista M. Steuben, Frank C. Tanser, John D. VanderHeide, Mingyou Yang, Njeri Wabiri, Simon I. Hay, and Laura Dwyer-Lindgren
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Male circumcision ,Medical male circumcision ,Voluntary medical male circumcision ,HIV ,HIV prevention ,Intervention ,Medicine - Abstract
Abstract Background HIV remains the largest cause of disease burden among men and women of reproductive age in sub-Saharan Africa. Voluntary medical male circumcision (VMMC) reduces the risk of female-to-male transmission of HIV by 50–60%. The World Health Organization (WHO) and Joint United Nations Programme on HIV/AIDS (UNAIDS) identified 14 priority countries for VMMC campaigns and set a coverage goal of 80% for men ages 15–49. From 2008 to 2017, over 18 million VMMCs were reported in priority countries. Nonetheless, relatively little is known about local variation in male circumcision (MC) prevalence. Methods We analyzed geo-located MC prevalence data from 109 household surveys using a Bayesian geostatistical modeling framework to estimate adult MC prevalence and the number of circumcised and uncircumcised men aged 15–49 in 38 countries in sub-Saharan Africa at a 5 × 5-km resolution and among first administrative level (typically provinces or states) and second administrative level (typically districts or counties) units. Results We found striking within-country and between-country variation in MC prevalence; most (12 of 14) priority countries had more than a twofold difference between their first administrative level units with the highest and lowest estimated prevalence in 2017. Although estimated national MC prevalence increased in all priority countries with the onset of VMMC campaigns, seven priority countries contained both subnational areas where estimated MC prevalence increased and areas where estimated MC prevalence decreased after the initiation of VMMC campaigns. In 2017, only three priority countries (Ethiopia, Kenya, and Tanzania) were likely to have reached the MC coverage target of 80% at the national level, and no priority country was likely to have reached this goal in all subnational areas. Conclusions Despite MC prevalence increases in all priority countries since the onset of VMMC campaigns in 2008, MC prevalence remains below the 80% coverage target in most subnational areas and is highly variable. These mapped results provide an actionable tool for understanding local needs and informing VMMC interventions for maximum impact in the continued effort towards ending the HIV epidemic in sub-Saharan Africa.
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- 2020
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6. Long-term immunological responses to treatment among HIV-2 patients in Côte d’Ivoire
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Peter A. Minchella, Christiane Adjé-Touré, Guoqing Zhang, Andre Tehe, Judith Hedje, Erin R. Rottinghaus, Natacha Kohemun, Micheline Aka, Karidia Diallo, G. Laissa Ouedraogo, Kevin M. De Cock, and John N Nkengasong
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HIV ,HIV-2 ,CD4 ,ART ,Côte d’Ivoire ,Africa ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Studies indicate that responses to HIV-2 treatment regimens are worse than responses to HIV-1 regimens during the first 12 months of treatment, but longer-term treatment responses are poorly described. We utilized data from Côte d’Ivoire’s RETRO-CI laboratory to examine long-term responses to HIV-2 treatment. Methods Adult (≥15 years) patients with baseline CD4 counts 75% of their recorded visits. Kaplan-Meier estimates for achievement of CD4 ≥ 500 cells/μl after 6 years of follow-up for patients in the lower CD4 strata (
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- 2020
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7. Factors Associated With Experiences of Fear, Anxiety, Depression, and Changes in Sleep Pattern During the COVID-19 Pandemic Among Adults in Nigeria: A Cross-Sectional Study
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Morenike Oluwatoyin Folayan, Olanrewaju Ibigbami, Brandon Brown, Maha El Tantawi, Nourhan M. Aly, Oliver C. Ezechi, Giuliana Florencia Abeldaño, Eshrat Ara, Martin Amogre Ayanore, Passent Ellakany, Balgis Gaffar, Nuraldeen Maher Al-Khanati, Ifeoma Idigbe, Mohammed Jafer, Abeedha Tu-Allah Khan, Zumama Khalid, Folake Barakat Lawal, Joanne Lusher, Ntombifuthi P. Nzimande, Bamidele Olubukola Popoola, Mir Faeq Ali Quadri, Mark Roque, Ala'a B. Al-Tammemi, Muhammad Abrar Yousaf, Jorma I. Virtanen, Roberto Ariel Abeldaño Zuñiga, Nicaise Ndembi, John N. Nkengasong, and Annie Lu Nguyen
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SARS-CoV-2 ,mental health ,HIV ,COVID-19 ,Nigeria ,mental distress ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundMultiple facets of the pandemic can be a source of fear, depression, anxiety and can cause changes in sleep patterns. The aim of this study was to identify health profiles and the COVID-19 pandemic related factors associated with fear, depression, anxiety and changes in sleep pattern in adults in Nigeria.MethodsThe data for this analysis was extracted from a cross-sectional online survey that collected information about mental health and well-ness from a convenience sample of adults 18 years and above resident in Nigeria from July to December 2020. Study participants were asked to complete an anonymous, closed-ended online questionnaire that solicited information on sociodemographic profile, health profiles (high, moderate and low COVID-19 infection risk profile) including HIV status, COVID-19 status, and self-reported experiences of fear, anxiety, depression and changes in sleep patterns.ResultsIn total, 4,439 participants with mean age of 38.3 (±11.6) years responded to the survey. Factors associated with higher odds of having COVID-19 related fear were health risk (p < 0.05); living with HIV (AOR: 3.88; 95% CI: 3.22–4.69); having COVID-19 symptoms but not tested (AOR: 1.61; 95% CI: 1.30–1.99); having a friend who tested positive to COVID-19 (AOR: 1.28; 95% CI: 1.07–1.53) and knowing someone who died from COVID-19 (AOR: 1.43; 95% CI: 1.24–1.65). The odds of feeling anxious was significantly higher for those with moderate or low health risk profile (p < 0.05); living with HIV (AOR: 1.64; 95% CI: 1.32–2.04); had a friend who tested positive for COVID-19 (AOR: 1.35; 95% CI: 1.08–1.68) or knew someone who died from COVID-19 (AOR: 1.53; 95% CI: 1.28–1.84). The odds of feeling depressed was significantly higher for those with health risk profile (p < 0.05); living with HIV (AOR: 2.49; 95% CI: 1.89–3.28); and respondents who had COVID-19 symptoms but had not taken a test (AOR: 1.41; 95% CI: 1.02–1.94). Factors associated with higher odds of having sleep pattern changes were having moderate and low health risk profiles (p < 0.05).ConclusionThe study findings suggest that the pandemic may cause fear, anxiety, depression and changes in sleep patterns differently for people with different health profile, HIV status and COVID-19 status.
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- 2022
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8. Nursing leadership in Africa and health security
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John N. Nkengasong, Tajudeen Raji, Stephanie L. Ferguson, Muhammad A. Pate, and Michelle A. Williams
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Medicine (General) ,R5-920 - Published
- 2021
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9. COVID-19 and indirect health implications in Africa: Impact, mitigation measures, and lessons learned for improved disease control.
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Seth C Inzaule, Pascale Ondoa, Marguerite Massinga Loembe, Yenew Kebede Tebeje, Ahmed E Ogwell Ouma, and John N Nkengasong
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Medicine - Abstract
Seth Inzaule and co-authors discuss implications of the COVID-19 pandemic for health in African countries.
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- 2021
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10. Accelerating genomics-based surveillance for COVID-19 response in Africa
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Sofonias K Tessema, Seth C Inzaule, Alan Christoffels, Yenew Kebede, Tulio de Oliveira, Ahmed E Ogwell Ouma, Christian T Happi, and John N Nkengasong
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Medicine (General) ,R5-920 ,Microbiology ,QR1-502 - Published
- 2020
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11. Role of public-private partnerships in achieving UNAIDS HIV treatment targets
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Ritu Shrivastava, Peter N. Fonjungo, Yenew Kebede, Rajendra Bhimaraj, Shabnam Zavahir, Christina Mwangi, Renuka Gadde, Heather Alexander, Patricia L. Riley, Andrea Kim, and John N. Nkengasong
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Public-private partnership ,Viral load ,Early infant diagnosis ,Laboratory systems strengthening ,Cascade ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Despite progress towards achieving UNAIDS 90–90-90 goals, barriers persist in laboratory systems in sub-Saharan Africa (SSA) restricting scale up of early infant diagnosis (EID) and viral load (VL) test monitoring of patients on antiretroviral therapy. If these facilities and system challenges persist, they may undermine recorded gains and appropriate management of patients. The aim of this review is to identify Public Private Partnerships (PPP) in SSA that have resolved systemic barriers within the VL and EID treatment cascade and demonstrated impact in the scale up of VL and EID. Methods We queried five HIV and TB laboratory databases from 2007 to 2017 for studies related to laboratory system strengthening and PPP. We identified, screened and included PPPs that demonstrated evidence in alleviating known system level barriers to scale up national VL and EID testing programs. PPPs that improved associated systems from the point of viral load test request to the use of the test result for patient management were deemed eligible. Results We identified six PPPs collaborations with multiple activities in select countries that are contributing to address challenges to scale up national viral load programs. One of the six PPPs reached 14.5 million patients in remote communities and transported up to 400,000 specimens in a year. Another PPP enabled an unprecedented 94% of specimens to reach national laboratory through improved sample referral network and enabled a cost savings of 62%. Also PPPs reduced cost of reagents and enabled 300,000 tested infants to be enrolled in care as well as reduced turnaround time of reporting results by 50%. Conclusions Our review identified the benefits, enabling factors, and associated challenges for public and private sectors to engage in PPPs. PPP contributions to laboratory systems strengthening are a model and present opportunities that can be leveraged to strengthen systems to achieve the UNAIDS 90–90-90 treatment targets for HIV/AIDS. Despite growing emphasis on engaging the private sector as a critical partner to address global disease burden, PPPs that specifically strengthen laboratories, the cornerstone of public health programs, remain largely untapped.
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- 2019
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12. Africa Centres for Disease Control and Prevention’s framework for antimicrobial resistance control in Africa
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Jay K. Varma, John Oppong-Otoo, Pascale Ondoa, Olga Perovic, Benjamin J. Park, Ramanan Laxminarayan, Rosanna W. Peeling, Constance Schultsz, Han Li, Chikwe Ihekweazu, Amadou A. Sall, Baboucarr Jaw, and John N. Nkengasong
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health security ,antibiotic resistance ,bacteria ,surveillance ,infection control ,Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
No abstract available.
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- 2018
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13. Lessons from the elimination of poliomyelitis in Africa
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Abdulaziz Mohammed, Oyewale Tomori, and John N. Nkengasong
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Economic growth ,medicine.medical_specialty ,Transmission (medicine) ,Epidemiology ,Public health ,Harmonization ,medicine.disease ,Global Health ,Pledge ,World health ,Poliomyelitis ,Poliovirus Vaccines ,Underserved Population ,Viral infection ,Political science ,Perspective ,Africa ,medicine ,Smallpox ,Animals ,Humans ,Disease Eradication ,Vaccination Hesitancy - Abstract
In August 2020, Africa was declared free of poliomyelitis (polio), bringing to fruition a goal that took more than 30 years to achieve. This Perspective chronicles global, continental, national and community actions taken by diverse stakeholders that finally led to the elimination of transmission of wild poliovirus in Africa. The cascade of events started with the development of polio vaccines and the realization that polio, much like smallpox, could be eradicated. After a 1988 pledge by the World Health Assembly to eradicate polio globally, concerted and deliberate efforts were made in Africa to achieve this goal. This included the use of evidence-based approaches for the harmonization and standardization of public health strategies, using a network of polio laboratories and emergency operation centres and actively pursuing underserved populations. Innovative solutions to counter challenges such as conflict and vaccine hesitancy may be of use in future public health interventions., This Perspective chronicles the journey to the elimination of transmission of wild poliovirus in Africa, with a critical discussion of the global, continental, national and community actions that were required and the lessons learnt along the way.
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- 2021
14. Establishing the Africa Centres for Disease Control and Prevention: responding to Africa's health threats
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John N Nkengasong, Olawale Maiyegun, and Matshidiso Moeti
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Public aspects of medicine ,RA1-1270 - Published
- 2017
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15. Audio Interview: Infectious Disease in Africa
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Eric J. Rubin, Lindsey R. Baden, John N. Nkengasong, and Stephen Morrissey
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Surveys and Questionnaires ,Africa ,Disease Transmission, Infectious ,Humans ,General Medicine ,Communicable Diseases - Published
- 2022
16. The SLMTA programme: Transforming the laboratory landscape in developing countries
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Katy Yao, Talkmore Maruta, Elizabeth T. Luman, and John N. Nkengasong
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SLMTA ,laboratory ,Strengthening Laboratory Management Toward Accreditation ,Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
Background: Efficient and reliable laboratory services are essential to effective and well-functioning health systems. Laboratory managers play a critical role in ensuring the quality and timeliness of these services. However, few laboratory management programmes focus on the competencies required for the daily operations of a laboratory in resource-limited settings. This report provides a detailed description of an innovative laboratory management training tool called Strengthening Laboratory Management Toward Accreditation (SLMTA) and highlights some challenges, achievements and lessons learned during the first five years of implementation (2009–2013) in developing countries. Programme: SLMTA is a competency-based programme that uses a series of short courses and work-based learning projects to effect immediate and measurable laboratory improvement, while empowering laboratory managers to implement practical quality management systems to ensure better patient care. A SLMTA training programme spans from 12 to 18 months; after each workshop, participants implement improvement projects supported by regular supervisory visits or on-site mentoring. In order to assess strengths, weaknesses and progress made by the laboratory, audits are conducted using the World Health Organization’s Regional Office for Africa (WHO AFRO) Stepwise Laboratory Quality Improvement Process Towards Accreditation (SLIPTA) checklist, which is based on International Organization for Standardization (ISO) 15189 requirements. These internal audits are conducted at the beginning and end of the SLMTA training programme. Conclusion: Within five years, SLMTA had been implemented in 617 laboratories in 47 countries, transforming the laboratory landscape in developing countries. To our knowledge, SLMTA is the first programme that makes an explicit connection between the performance of specific management behaviours and routines and ISO 15189 requirements. Because of this close relationship, SLMTA is uniquely positioned to help laboratories seek accreditation to ISO 15189.
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- 2014
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17. COVID-19 vaccine access in Africa: Global distribution, vaccine platforms, and challenges ahead
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John N. Nkengasong and Marguerite Massinga Loembé
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Economic growth ,2019-20 coronavirus outbreak ,COVID-19 Vaccines ,Coronavirus disease 2019 (COVID-19) ,Forum ,SARS-CoV-2 ,Immunology ,Vaccination ,COVID-19 ,Biology ,Global Health ,Health Services Accessibility ,Infectious Diseases ,Global distribution ,Global public good ,Pandemic ,Africa ,Global health ,Immunology and Allergy ,Humans ,Scientific achievement - Abstract
Development COVID-19 vaccines in a record time has been an unprecedented global scientific achievement. However, the world has failed to ensure equitable access to what should have been a global public good. What options remain available to African countries to ensure immunization of their populations and ultimately overcome the pandemic?
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- 2021
18. Specimen origin, type and testing laboratory are linked to longer turnaround times for HIV viral load testing in Malawi.
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Peter A Minchella, Geoffrey Chipungu, Andrea A Kim, Abdoulaye Sarr, Hammad Ali, Reuben Mwenda, John N Nkengasong, and Daniel Singer
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Medicine ,Science - Abstract
BACKGROUND:Efforts to reach UNAIDS' treatment and viral suppression targets have increased demand for viral load (VL) testing and strained existing laboratory networks, affecting turnaround time. Longer VL turnaround times delay both initiation of formal adherence counseling and switches to second-line therapy for persons failing treatment and contribute to poorer health outcomes. METHODS:We utilized descriptive statistics and logistic regression to analyze VL testing data collected in Malawi between January 2013 and March 2016. The primary outcomes assessed were greater-than-median pretest phase turnaround time (days elapsed from specimen collection to receipt at the laboratory) and greater-than-median test phase turnaround time (days from receipt to testing). RESULTS:The median number of days between specimen collection and testing increased 3-fold between 2013 (8 days, interquartile range (IQR) = 6-16) and 2015 (24, IQR = 13-39) (p
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- 2017
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19. The diagnostic-clinical chasm: Work in progress?
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John N. Nkengasong
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Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
No abstract available.
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- 2016
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20. Laboratory evaluation of the Chembio Dual Path Platform HIV-Syphilis Assay
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Mireille B. Kalou, Arnold Castro, Amy Watson, Heather Jost, Stacy Clay, Ye Tun, Cheng Chen, Kevin Karem, John N. Nkengasong, Ronald Ballard, and Bharat Parekh
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HIV ,Syphilis ,dual rapid diagnostic test ,Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
Background: Use of rapid diagnostic tests for HIV and syphilis has increased remarkably in the last decade. As new rapid diagnostic tests become available, there is a continuous need to assess their performance and operational characteristics prior to use in clinical settings. Objectives: In this study, we evaluated the performance of the Chembio Dual Path Platform (DPP®) HIV–Syphilis Assay to accurately diagnose HIV, syphilis, and HIV/syphilis co-infection. Method: In 2013, 990 serum samples from the Georgia Public Health Laboratory in Atlanta, Georgia, United States were characterised for HIV and syphilis and used to evaluate the platform. HIV reference testing combined third-generation Enzyme Immunoassay and Western Blot, whereas reference testing for syphilis was conducted by the Treponema pallidum passive particle agglutination method and the TrepSure assay. We assessed the sensitivity and specificity of the DPP assay on this panel by comparing results with the HIV and syphilis reference testing algorithms. Results: For HIV, sensitivity was 99.8% and specificity was 98.4%; for syphilis, sensitivity was 98.8% and specificity was 99.4%. Of the 348 co-infected sera, 344 (98.9%) were detected accurately by the DPP assay, but 11 specimens had false-positive results (9 HIV and 2 syphilis) due to weak reactivity. Conclusion: In this evaluation, the Chembio DPP HIV–Syphilis Assay had high sensitivity and specificity for detecting both HIV and treponemal antibodies. Our results indicate that this assay could have a significant impact on the simultaneous screening of HIV and syphilis using a single test device for high-risk populations or pregnant women needing timely care and treatment.
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- 2016
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21. The Global Response to the COVID-19 Pandemic
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Allyson M. Pollock, Eduardo López-Collazo, Juhwan Oh, Cesar G. Victora, Antonella Viola, George F. Gao, Anurag Agrawal, Christian Drosten, John N. Nkengasong, Cecilia Söderberg-Naucler, Akiko Iwasaki, and Michael J. Baker
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2019-20 coronavirus outbreak ,Economic growth ,Coronavirus disease 2019 (COVID-19) ,SARS-CoV-2 ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,education ,Psychological intervention ,COVID-19 ,General Medicine ,Voices ,Human health ,Political science ,Communicable Disease Control ,Pandemic ,Humans ,Pandemics - Abstract
Global approaches towards pandemic control range from strict lockdowns to minimal restrictions. We asked experts worldwide about the lessons learned from their countries' response. Their voices converge on the importance of scientifically guided interventions to limit the spread of SARS-CoV-2 and its impact on human health.
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- 2020
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22. COVID-19 in Africa: the spread and response
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John N. Nkengasong, Akhona Tshangela, Marguerite Massinga Loembé, Ahmed E Ogwell Ouma, Stephanie J. Salyer, and Jay K. Varma
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0301 basic medicine ,medicine.medical_specialty ,Coronavirus disease 2019 (COVID-19) ,Public health ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,General Medicine ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Political science ,Development economics ,Pandemic ,medicine ,Social disruption ,Economic consequences ,Coronavirus Infections ,Healthcare system - Abstract
Given the current trends in incidence and underlying healthcare systems vulnerabilities, Africa could become the next epicenter of the COVID-19 pandemic. As the pandemic transitions to more widespread community transmission, how can the lessons learned thus far be consolidated to effectively curb the spread of COVID-19 while minimizing social disruption and negative humanitarian and economic consequences?
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- 2020
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23. Population-Based Serosurveys for SARS-CoV-2: Key Findings From Five African Countries: November 2020 to June 2021
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Atuheire B. Emily, Bernard Barekye, Hilary Bower, Festo Mazuguni, Talkmore Maruta, Marguerite Massinga Loembé PhD, Tamuno-Wari Numbere, Martin Muita, Justin Maeda, Wessam Mankoula, Abdulaziz Mohammed, and John N. Nkengasong
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- 2022
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24. Molecular Epidemiology and Transmission Dynamics of Recent and Long-Term HIV-1 Infections in Rural Western Kenya.
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Clement Zeh, Seth C Inzaule, Pascale Ondoa, Lillian G Nafisa, Alex Kasembeli, Fredrick Otieno, Hilde Vandenhoudt, Pauli N Amornkul, Lisa A Mills, and John N Nkengasong
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Medicine ,Science - Abstract
To identify unique characteristics of recent versus established HIV infections and describe sexual transmission networks, we characterized circulating HIV-1 strains from two randomly selected populations of ART-naïve participants in rural western Kenya.Recent HIV infections were identified by the HIV-1 subtype B, E and D, immunoglobulin G capture immunoassay (IgG BED-CEIA) and BioRad avidity assays. Genotypic and phylogenetic analyses were performed on the pol gene to identify transmitted drug resistance (TDR) mutations, characterize HIV subtypes and potential transmission clusters. Factors associated with recent infection and clustering were assessed by logistic regression.Of the 320 specimens, 40 (12.5%) were concordantly identified by the two assays as recent infections. Factors independently associated with being recently infected were age ≤19 years (P = 0.001) and history of sexually transmitted infections (STIs) in the past six months (P = 0.004). HIV subtype distribution differed in recently versus chronically infected participants, with subtype A observed among 53% recent vs. 68% chronic infections (p = 0.04) and subtype D among 26% recent vs. 12% chronic infections (p = 0.012). Overall, the prevalence of primary drug resistance was 1.16%. Of the 258 sequences, 11.2% were in monophyletic clusters of between 2-4 individuals. In multivariate analysis factors associated with clustering included having recent HIV infection P = 0.043 and being from Gem region P = 0.002.Recent HIV-1 infection was more frequent among 13-19 year olds compared with older age groups, underscoring the ongoing risk and susceptibility of younger persons for acquiring HIV infection. Our findings also provide evidence of sexual networks. The association of recent infections with clustering suggests that early infections may be contributing significant proportions of onward transmission highlighting the need for early diagnosis and treatment as prevention for ongoing prevention. Larger studies are needed to better understand the structure of these networks and subsequently implement and evaluate targeted interventions.
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- 2016
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25. Are post-Ebola reconstruction efforts neglecting public health laboratory systems?
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John N Nkengasong and Beth A Skaggs
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Public aspects of medicine ,RA1-1270 - Published
- 2015
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26. A year of genomic surveillance reveals how the SARS-CoV-2 pandemic unfolded in Africa
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Aida Elargoubi, John M. Morobe, Jiro Yasuda, Madisa Mine, Faustinos T. Takawira, Jean-Jacques Muyembe Tamfum, Amal Souissi, Hela Karray, Dominique Goedhals, Michael Owusu, Mitoha O. Ayekaba, Pascale Ondoa, Bryan Fulbert Nkengfack Tegomoh, Daniel G. Amoako, Mathabo Mareka, Sameh Trabelsi, Dorcas Maruapula, Magalutcheemee Ramuth, Danny S. Park, Bamidele Soji Oderinde, Maitshwarelo I. Matsheka, Robert A. Kingsley, Philippe Dussart, Matthew Cotten, Hesham A. Elgahzaly, Oyewale Tomori, Arash Iranzadeh, Nicksy Gumede, Marta Giovanetti, Folarin Onikepe, Omoruyi E. Chukwuma, Nnaemeka Ndodo, Mba Nwando, Oladiji Femi, Sylvie L. Budiaki, Gemma L. Kay, Johnson C. Okolie, Saber Masmoudi, Okokhere Peter, Hlanai Gumbo, Sara H.A. Agwa, Mooko Sekhele, Imed Gaaloul, Sheila M. Mandanda, Enatha Mukantwari, Ngonda Saasa, Sanaâ Lemriss, Hellen Nansumba, Akano Kazeem, Upasana Ramphal, Carolyn Williamson, Belinda Louise Herring, Vagner Fonseca, Edidah M. Ong'era, Joana Q. Mends, Ahmed E Ogwell Ouma, Anika Vinze, Ahmad Sayed, Richard Phillips, Adewunmi M. Olubusuyi, Bourema Kouriba, Vivianne Gorova, John O. Gyapong, Tulio de Oliveira, Arnold W. Lambisia, Najla Kharrat, Wolfgang Preiser, Ojide Chiedozie Kingsley, Yenew K. Tebeje, Sherihane Aryeetey, Yaw Bediako, David A. Rasmussen, Wael H. Roshdy, Norosoa Harline Razanajatovo, Siham Elhamoumi, Sylvie van der Werf, Moussa Moïse Diagne, Claudia Daubenberger, Oshomah Cyril, Andrew J. Page, Uwanibe Jessica, Matoke-Muhia Damaris, Daniel J. Bridges, Sumir Panji, Mahjoub Aouni, Adnene Hammami, Simani Gaseitsiwe, Daniel Lule Bugembe, Gugu Maphalala, Kim Hae-Young, Mohamed K. Khalifa, Safietou Sankhe, Fabian H. Leendertz, Richard Njouom, Ousmane Faye, Kwabena O. Duedu, Jeffrey G. Shaffer, Tobias Schindler, Bankole Bolajoko, Cathrine Scheepers, Francisca M. Muyembe, Ajogbasile F. Victoria, Mirabeau T. Youtchou, Ayoade Femi, Amel Chtourou, Kefentse A. Tumedi, Adrienne A. Amuri, Joyce M. Ngoi, Etile Anoh, Richmond Gorman, Mohamed Abouelhoda, Ali Ahmed Yahaya, Paulo Arnaldo, Alexander J. Trotter, Lahcen Belyamani, Isaac Ssewanyana, Susan Nabadda, Arshad Ismail, Julia C. Andeko, James Emmanuel San, Susan Engelbrecht, Sikhulile Moyo, Jinal N. Bhiman, Jean-Michel Heraud, Julius J. Lutwama, Samar Metha, Amadou Diallo, Soa-Fy Andriamandimby, Rosina A. A. Carr, Edgar Simulundu, Steve A. Mundeke, Nelson B. Silochi, Shymaa S. Ahmed, Nadia Touil, Ihekweazu Chikwe, Deogratius Ssemwanga, Ilhem Boutiba-Ben Boubaker, Houriiyah Tegally, Okogbenin Sylvanus, Abdoul K. Sangare, Mulenga Mwenda, Fausta Shakiwa Mosha, Amadou A. Sall, Derek Tshiabuila, D. James Nokes, Yvan Butera, Maximillian Mpina, Adedotun-Sulaiman Kemi, Onwe E. Ogah, Jean B. Lekana-Douk, Stephen F. Schaffner, Vincent Enouf, Chantal Akoua-Koffi, Diarra Bassirou, Edwin Shumba, Deelan Doolabh, Saba Gargouri, Kayode T. Adeyemi, Wonderful T. Choga, Nicola Mulder, Inbal Gazy, Mushal Allam, Saâd El Kabbaj, Christian T. Happi, Frank Tanser, Sobajo Tope, Michael R. Wiley, Katherine J. Siddle, Charles N. Agoti, John Kayiwa, George Githinji, Diego F. Cuadros, Abdoul-Salam Ouédraogo, Fowotade Adeola, Sonia Lekana-Douki, Edith N. Ngabana, William Ampofo, U George, Elmostafa El Fahime, Jean-Claude C Makangara, Nalia Ismael, Ebenezer Foster-Nyarko, Samar K. Kassim, Nedio Mabunda, Hafaliana Christian Ranaivoson, Tapfumanei Mashe, Sylvie Behillil, Etienne Simon-Loriere, Donwilliams O. Omuoyo, Darren P. Martin, Azeddine Ibrahimi, Paul E. Oluniyi, Richard J Lessells, My V. T. Phan, Feriel Bouzid, Salako B. Lawal, Gert U. van Zyl, Fares Wasfi, Christophe Peyrefitte, Joyce Namulondo, Ugochukwu J. Anyaneji, Mariétou Faye Paye, Augustina Sylverken, Sébastien Calvignac-Spencer, Malebogo Kebabonye, Sophie J Prosolek, Mahmoud el Hefnawi, Adeyemi O. O. Oluwapelumi, Fakayode O. Enoch, Eddy Kinganda Lusamaki, Gaetan Thilliez, Beatrice Dhaala, Gabriel K. Mbunsu, Lavanya Singh, Nnennaya A. Ajayi, Justin O'Grady, Olawoye Idowu, Ngoy Nsenga, Baba Marycelin, Ndongo Dia, Abdul Karim Sesay, Ikponmwosa Odia, Chika K. Onwuamah, Pardis C. Sabeti, Collins M. Morang’a, Hajar Lemriss, Dominic S. Y. Amuzu, Jones Gyamfi, Sofonias K. Tessema, Iyaloo Konstantinus, Pontiano Kaleebu, Patrick Semanda, Fawzi Derrar, Alpha Kabinet Keita, Joweria Nakaseegu, Ibtihel Smeti, Jocelyn Kiconco, Audu Rosemary, K Said, Bronwyn Kleinhans, Fatma Abdelmoula, Sureshnee Pillay, Abechi Priscilla, Manel Turki, Fred A. Dratibi, Berthe-Marie Njanpop-Lafourcade, Zaydah R. de Laurent, David Baker, Nadine Rujeni, Oguzie Judith, Peter K. Quashie, Phillip Armand Bester, Emmanuel Lokilo, Catherine Pratt, Nabil Abid, Mamadou Diop, Placide Mbala, Eduan Wilkinson, Johnathan A. Edwards, Ahmed Rebai, Haruka Abe, Ana Victoria Gutierrez, Thanh Le-Viet, Essia Belarbi, Steven Rudder, Jouali Farah, Maha Mastouri, Nei-yuan Hsiao, Happi Anise, Cara E. Brook, Lamia Fki-Berrajah, Gordon A. Awandare, Ugwu Chinedu, Abdel-Rahman N. Zekri, Sami Kammoun, Leonardo de Oliveira Martins, Martin M. Nyaga, Lynn Tyers, Jingjing Li, Ikhlas Ben Ayed, Mouna Ouadghiri, Amadou Koné, Reuben Ayivor-Djanie, Innocent Mudau, Thabo Mohale, Olumade Testimony, Eromon Philomena, Yeshnee Naidoo, Patrice Combe, Seydou Doumbia, Anne von Gottberg, Akpede George, Nosamiefan Iguosadolo, Mohamed G. Seadawy, Bronwyn McInnis, Faida Ajili, Grit Schubert, Tarik Aanniz, Maureen W. Mburu, Soumeya Ouangraoua, John N. Nkengasong, Jennifer Giandhari, University of KwaZulu-Natal [Durban, Afrique du Sud] (UKZN), Stellenbosch University, Laboratório de Biologia Molecular de Flavivírus [Rio de Janeiro], Instituto Oswaldo Cruz / Oswaldo Cruz Institute [Rio de Janeiro] (IOC), Fundação Oswaldo Cruz / Oswaldo Cruz Foundation (FIOCRUZ), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Fundação Oswaldo Cruz / Oswaldo Cruz Foundation (FIOCRUZ), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Universidade Federal de Minas Gerais = Federal University of Minas Gerais [Belo Horizonte, Brazil] (UFMG), University of Cincinnati (UC), University of Cape Town, North Carolina State University [Raleigh] (NC State), University of North Carolina System (UNC), Recherches Translationnelles sur le VIH et les maladies infectieuses endémiques et émergentes (TransVIHMI), Institut de Recherche pour le Développement (IRD)-Université de Yaoundé I-Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Institut Pasteur de Dakar, Réseau International des Instituts Pasteur (RIIP), University of Chicago, Institut Pasteur de Madagascar, Génomique évolutive des virus à ARN - Evolutionary genomics of RNA viruses, Institut Pasteur [Paris] (IP), Centre Hospitalier de Mayotte, Centre Pasteur du Cameroun, Génétique Moléculaire des Virus à ARN - Molecular Genetics of RNA Viruses (GMV-ARN (UMR_3569 / U-Pasteur_2)), Institut Pasteur [Paris] (IP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Centre National de Référence des virus des infections respiratoires (dont la grippe) - National Reference Center Virus Influenzae [Paris] (CNR - laboratoire coordonnateur), Institut Pasteur [Paris] (IP)-Université Paris Cité (UPCité), Université de Sfax - University of Sfax, National Institute for Communicable Diseases [Johannesburg] (NICD), University of the Witwatersrand [Johannesburg] (WITS), Centre Hospitalier Universitaire Souro Sanou [Bobo-Dioulasso] (CHUSS), Centre for the AIDS Programme of Research [Durban, South Africa] (CAPRISA), University of Washington [Seattle], The University of Ghana (WACCBIP) team was funded by a Wellcome/African Academy of Sciences Developing Excellence in Leadership Training and Science (DELTAS) grant (DEL-15-007 and 107755/Z/15/Z: Awandare), National Institute of Health Research (NIHR) (17.63.91) grants using UK aid from the UK government for a global health research group for genomic surveillance of malaria in West Africa (Wellcome Sanger Institute, UK) and the global research unit for Tackling Infections to Benefit Africa (TIBA partnership, University of Edinburgh), and a World Bank African Centres of Excellent grant (WACCBIP-NCDs: Awandare). Project ADAGE PRFCOV19-GP2 (2020-2022) includes 40 researchers from the Center of Biotechnology of Sfax, the University of Sfax, the University of Monastir, the University Hospital Hédi Chaker of Sfax, the Military Hospital of Tunis, and Dacima Consulting. Ministry of Higher Education and Scientific Research and Ministry of Health of the Republic of Tunisia. The Uganda contributions were funded by the UK Medical Research Council (MRC/UKRI) and the UK Department for International Development (DFID) under the MRC/DFID concordat agreement (grant agreement number NC_PC_19060) and by the Wellcome, DFID–Wellcome Epidemic Preparedness–Coronavirus (grant agreement number 220977/Z/20/Z) awarded to M.C. Work from Quadram Institute Bioscience was funded by The Biotechnology and Biological Sciences Research Council Institute Strategic Programme Microbes in the Food Chain BB/R012504/1 and its constituent projects BBS/E/F/000PR10348, BBS/E/F/000PR10349, BBS/E/F/000PR10351, and BBS/E/F/000PR10352 and by the Quadram Institute Bioscience BBSRC–funded Core Capability Grant (project number BB/CCG1860/1). The Africa Pathogen Genomics Initiative (Africa PGI) at the Africa CDC is supported by the Bill & Melinda Gates Foundation (INV018978 and INV018278), Illumina Inc, the US Centers for Disease Control and Prevention (CDC), and Oxford Nanopore Technologies. Sequences generated in Zambia through PATH were funded by the Bill & Melinda Gates Foundation. The findings and conclusions contained within are those of the authors and do not necessarily reflect positions or policies of the Bill & Melinda Gates Foundation. Funding for sequencing in Côte d’Ivoire, Burkina Faso, and part of the sequencing in the DRC was granted by the German Federal Ministry of Education and Research (BMBF). Sequencing efforts from Morocco have been supported by Academie Hassan II of Science and Technology, Morocco. Funding for surveillance, sampling, and testing in Madagasar was provided by the WHO, the CDC (grant U5/IP000812-05), the US Agency for International Development (USAID, cooperation agreement 72068719CA00001), and the Office of the Assistant Secretary for Preparedness and Response in the US Department of Health and Human Services (DHHS, grant number IDSEP190051-01-0200). Funding for sequencing was provided by the Bill & Melinda Gates Foundation (GCE/ID OPP1211841), Chan Zuckerberg Biohub, and the Innovative Genomics Institute at UC Berkeley. The Botswana Harvard AIDS Institute was supported by the following funding: H3ABioNet through funding from the National Institutes of Health Common Fund (U41HG006941)—H3ABioNet is an initiative of the Human Health and Heredity in Africa Consortium (H3Africa) program of the African Academy of Science (AAS), DHHS–NIH–National Institute of Allergy and Infectious Diseases (NIAID) (5K24AI131928-04 and 5K24AI131924-04), Sub-Saharan African Network for TB/HIV Research Excellence (SANTHE), a DELTAS Africa Initiative (grant DEL-15-0060—the DELTAS Africa Initiative is an independent funding scheme of the AAS’s Alliance for Accelerating Excellence in Science in Africa (AESA) and supported by the New Partnership for Africa’s Development Planning and Coordinating Agency (NEPAD Agency) with funding from the Wellcome Trust [grant 107752/Z/15/Z] and the UK government, and the South African Medical Research Council (SAMRC) and the Department of Technology and Innovation as part of the Network for Genomic Surveillance in South Africa (NGS-SA) and the Stellenbosch University Faculty of Medicine & Health Sciences, Strategic Equipment Fund. D.P.M. is funded by the Wellcome Trust (Wellcome Trust grant 222574/Z/21/Z). Sequencing activities at the NICD were supported by a conditional grant from the South African National Department of Health as part of the emergency COVID-19 response, a cooperative agreement between the National Institute for Communicable Diseases of the National Health Laboratory Service and the U.S. Centers for Disease Control and Prevention (grant number 5 U01IP001048-05-00), the African Society of Laboratory Medicine (ASLM) and Africa Centers for Disease Control and Prevention through a sub-award from the Bill and Melinda Gates Foundation grant number INV-018978, the UK Foreign, Commonwealth and Development Office and Wellcome (Grant no 221003/Z/20/Z), the South African Medical Research Council (Reference number SHIPNCD 76756), the UK Department of Health and Social Care, managed by the Fleming Fund and performed under the auspices of the SEQAFRICA project. Furthermore, pandemic surveillance in South Africa and Senegal was supported in part through NIH grant U01 AI151698 for the United World Antiviral Research Network (UWARN). Support for pandemic surveillance from the Tulio de Oliveira group to other African countries is funded by the Rockefeller Foundation. Sequencing efforts in the DRC were funded by the Bill & Melinda Gates Foundation under grant INV-018030 awarded to C.B.P. and further supported by funding from the Africa CDC through the ASLM (African Society of Laboratory Medicine) for Accelerating SARS-CoV-2 Genomic Surveillance in Africa. Sequencing efforts in Rwanda were commissioned by the NIHR Global Health Research program (16/136/33) using UK aid from the UK government (funding to E.M. and N.R. through TIBA partnership) and additional funds from the government of Rwanda through RBC/National Reference Laboratory in collaboration with the Belgian Development Agency (ENABEL) for additional genomic sequencing at GIGA Research Institute–Liege/Belgium. The sequencing effort in Equatorial Guinea was supported by a public-private partnership, the Bioko Island Malaria Elimination Project, composed of the government of Equatorial Guinea Ministries of Mines and Hydrocarbons, and Health and Social Welfare, Marathon EG Production Limited, Noble Energy, Atlantic Methanol Production Company, and EG LNG. Sample collection and typing in Mali were supported by Fondation Merieux–France, and sequence efforts have been supported by the Enable and Enhance Initiative of the German Federal Government’s Security Cooperation against Biological Threats in the G5 Sahel Region. The Nigeria work was made possible by support from Flu Lab and a cohort of generous donors through TED’s Audacious Project, including the ELMA Foundation, MacKenzie Scott, the Skoll Foundation, and Open Philanthropy. Further Nigeria funding came from grants from the NIAID (www.niaid.nih.gov), NIH-H3Africa (https://h3africa.org) (U01HG007480 and U54HG007480), and the World Bank grant (worldbank.org) (ACE IMPACT project) to C.H. Analysis for the Gabon strains was supported by the Science and Technology Research Partnership for Sustainable Development (SATREPS), Japan International Cooperation Agency (JICA), and Japan Agency for Medical Research and Development (AMED) (grant number JP20jm0110013) and a grant from AMED (grant number JP20wm0225003). Sequencing at KEMRI-Wellcome Trust Research Programme site in Kenya was supported by the National Institute for Health Research (NIHR) (project references 17/63/82 and 16/136/33), using UK aid from the UK Government to support global health research, and the UK Foreign, Commonwealth and Development Office and Wellcome Trust (grant# 102975, 220985)., and We acknowledge the authors from the originating laboratories and the submitting laboratories, who generated and shared, via GISAID, the genetic sequence data on which this research is based (table S4). We also acknowledge the contribution of K. Maria from the NGS-SA platform for their contribution toward the sequencing effort in Cape Town, South Africa. Similarly, we thank A. M. Elsaame, S. M. Elsayed, and R. M. Darwish from the Faculty of Medicine Ain Shams Research Institute (MASRI) for their efforts toward sequencing in Egypt. We thank S. Bane, M. Sanogo, D. Diallo, A. Combo Georges Togo, and A. Coulibaly from the University Clinical Research Centre (UCRC) at the University of Sciences, Techniques, and Technologies of Bamako for the contribution they have made toward sequencing efforts in Mali. We acknowledge the contribution of M. Moeti and A. Salam Gueye from the WHO for their contribution toward combating SARS-CoV-2 on the African continent. We further wish to extend acknowledgment to S. Lutucuta and J. Morais from the Angolan Ministry of Health for their continued hard work with regards to SARS-CoV-2 sampling, sequencing, and pandemic response in Angola. From Malawi we wish to acknowledge the work of B. Chilima, B. Mvula, and M. Chitenje from the Malawian Ministry of Health for their work on the COVID-19 response within the country.
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2019-20 coronavirus outbreak ,[SDV.MHEP.ME]Life Sciences [q-bio]/Human health and pathology/Emerging diseases ,Multidisciplinary ,Early introduction ,Coronavirus disease 2019 (COVID-19) ,Transmission (medicine) ,SARS-CoV-2 ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,COVID-19 ,Genetic Variation ,[SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology ,Genomics ,Left behind ,Geography ,[SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases ,Development economics ,Pandemic ,Africa ,Epidemiological Monitoring ,[SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/Virology ,Humans ,[SDV.SPEE]Life Sciences [q-bio]/Santé publique et épidémiologie ,QH426 ,RA ,Pandemics - Abstract
The progression of the SARS-CoV-2 pandemic in Africa has so far been heterogeneous and the full impact is not yet well understood. Here, we describe the genomic epidemiology using a dataset of 8746 genomes from 33 African countries and two overseas territories. We show that the epidemics in most countries were initiated by importations, predominantly from Europe, which diminished following the early introduction of international travel restrictions. As the pandemic progressed, ongoing transmission in many countries and increasing mobility led to the emergence and spread within the continent of many variants of concern and interest, such as B.1.351, B.1.525, A.23.1 and C.1.1. Although distorted by low sampling numbers and blind-spots, the findings highlight that Africa must not be left behind in the global pandemic response, otherwise it could become a breeding ground for new variants.
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- 2021
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27. The Annual Interview: The Covid-19 Pandemic
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John N. Nkengasong
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- 2021
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28. The Lancet Commission on diagnostics: transforming access to diagnostics
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Susan Horton, Hari S. Iyer, Tania S. Douglas, Shahin Sayed, Catharina Boehme, Kaushik Ramaiya, Lluis Donoso-Bach, Savvas Andronikou, Patricia J. Garcia, Bien Soo Tan, Kenneth A Fleming, Mikashmi Kohli, Bertha Aguilar, John N. Nkengasong, Kristen K. DeStigter, Sarwat Hussain, John Flanigan, Lai-Meng Looi, Lee F. Schroeder, Devanshi Shah, Richard Sullivan, Annie N.Y. Cheung, William Cherniak, Alain B. Labrique, John G. Meara, Pierrick Adam, Kamini Walia, Bernice Dahn, Rifat Atun, Kara-Lee Pool, Madhukar Pai, and Michael L Wilson
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Diagnostic Imaging ,business.industry ,SARS-CoV-2 ,MEDLINE ,COVID-19 ,The Lancet Commissions ,General Medicine ,Commission ,medicine.disease ,Global Health ,Health Services Accessibility ,03 medical and health sciences ,0302 clinical medicine ,Socioeconomic Factors ,030220 oncology & carcinogenesis ,medicine ,Humans ,030212 general & internal medicine ,Medical emergency ,business ,Developing Countries ,Diagnostic Techniques and Procedures - Published
- 2021
29. Immunization: vital progress, unfinished agenda
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Edmond S. W. Ng, Samba O. Sow, Beate Kampmann, Heidi J. Larson, Katherine L. O’Brien, Peter Piot, and John N. Nkengasong
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0301 basic medicine ,Economic growth ,medicine.medical_specialty ,Multidisciplinary ,Scientific progress ,Public health ,Programme implementation ,Social change ,Unmet needs ,Vaccination ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Immunization ,medicine ,030212 general & internal medicine ,Business ,Human species ,Engineering sciences. Technology - Abstract
Vaccination against infectious diseases has changed the future of the human species, saving millions of lives every year, both children and adults, and providing major benefits to society as a whole. Here we show, however, that national and sub-national coverage of vaccination varies greatly and major unmet needs persist. Although scientific progress opens exciting perspectives in terms of new vaccines, the pathway from discovery to sustainable implementation can be long and difficult, from the financing, development and licensing to programme implementation and public acceptance. Immunization is one of the best investments in health and should remain a priority for research, industry, public health and society.
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- 2019
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30. A comprehensive review of the SLMTA literature part 1: Content analysis and future priorities
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Elizabeth T. Luman, Katy Yao, and John N. Nkengasong
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Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
Background: Since its introduction in 2009, the Strengthening Laboratory Management Toward Accreditation (SLMTA) programme has been implemented widely throughout Africa, as well as in the Caribbean, Central and South America, and Southeast Asia. Objective: We compiled results from local, national and global studies to provide a broad view of the programme and identify directions for the future. The review consists of two companion papers; this paper focuses on content analysis, examining various thematic components of the SLMTA programme and future priorities. Methods: A systematic literature search identified 28 published articles about implementing the SLMTA programme. Results for various components of the SLMTA programme were reviewed and summarised. Results: Local and national studies provide substantial information on previous experiences with quality management systems; variations on SLMTA implementation; building human resource capacity for trainers, mentors and auditors; the benefits and effectiveness of various types of mentorship; the importance of management buy-in to ensure country ownership; the need to instill a culture of quality in the laboratory; success factors and challenges; and future directions for the programme. Conclusions: Local, national and global results suggest that the SLMTA programme has been overwhelmingly successful in transforming laboratory quality management. There is an urgent need to move forward in four strategic directions: progression (continued improvement in SLMTA laboratories), saturation (additional laboratories within countries that have implemented SLMTA), expansion (implementation in additional countries), and extension (adapting SLMTA for implementation beyond the laboratory), to lead to transformation of overall health systems and patient care.
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- 2014
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31. Quality matters in strengthening global laboratory medicine
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John N. Nkengasong and Deborah Birx
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Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
No abstract available.
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- 2014
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32. A comprehensive review of the SLMTA literature part 2: Measuring success
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Elizabeth T. Luman, Katy Yao, and John N. Nkengasong
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Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
Background: Since its introduction in 2009, the Strengthening Laboratory Management Toward Accreditation (SLMTA) programme has been implemented in 671 laboratories in 47 countries. Objective: We completed a systematic review of the published literature on SLMTA. The review consists of two companion papers; this article examines quantitative evidence presented in the publications along with a meta-analysis of selected results. Methods: We identified 28 published articles with data from SLMTA implementation. The SLMTA programme was evaluated through audits based on a standard checklist, which is divided into 12 sections corresponding to the 12 Quality System Essentials (QSEs). Several basic service delivery indicators reported by programmes were also examined. Results for various components of the programme were reviewed and summarised; a meta-analysis of QSE results grouped by the three stages of the quality cycle was conducted for 126 laboratories in 12 countries. Results: Global programme data show improved quality in SLMTA laboratories in every country, with average improvements on audit scores of 25 percentage points. Meta-analysis identified Improvement Management as the weakest stage, with internal audits (8%) and occurrence management (16%) showing the lowest scores. Studies documented 19% – 95% reductions in turn-around times, 69% – 93% reductions in specimen rejection rates, 76% – 81% increases in clinician satisfaction rates, 67% – 85% improvements in external quality assessment results, 50% – 66% decreases in nonconformities and 67% increases in staff punctuality. Conclusions: The wide array of results reported provides a comprehensive picture of the SLMTA programme overall, suggesting a substantive impact on provision of quality laboratory services and patient care. These comprehensive results establish a solid data-driven foundation for program improvement and further expansion.
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- 2014
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33. Nursing leadership in Africa and health security
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Stephanie L. Ferguson, Tajudeen Raji, John N. Nkengasong, Michelle A. Williams, and Muhammad Ali Pate
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Medicine (General) ,2019-20 coronavirus outbreak ,R5-920 ,Coronavirus disease 2019 (COVID-19) ,Nursing ,business.industry ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Commentary ,Medicine ,General Medicine ,Health security ,business - Published
- 2021
34. Disease surveillance for the COVID-19 era: time for bold changes
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Gabriel M. Leung, Ximena Aguilera, Anne Schuchat, Eun kyeong Jeong, Chikwe Ihekweazu, Ibrahima Socé Fall, Barbara E. Mahon, Oliver Morgan, John H Amuasi, John N. Nkengasong, Scott F. Dowell, Thomas R. Frieden, Lothar Wieler, Andrea Ammon, Farah Naz Qamar, and David L Heymann
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2019-20 coronavirus outbreak ,Disease surveillance ,Coronavirus disease 2019 (COVID-19) ,business.industry ,SARS-CoV-2 ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Comment ,COVID-19 ,General Medicine ,Virology ,COVID-19 Testing ,Population Surveillance ,Pandemic ,Medicine ,Humans ,ddc:610 ,business ,610 Medizin und Gesundheit ,Pandemics - Abstract
The COVID-19 pandemic has exposed weaknesses in disease surveillance in nearly all countries. Early identification of COVID-19 cases and clusters for rapid containment was hampered by inadequate diagnostic capacity, insufficient contact tracing, fragmented data systems, incomplete data insights for public health responders, and suboptimal governance of all these elements. Once SARS-CoV-2 became widespread, interventions to control community transmission were undermined by weak surveillance of cases and insufficient national capacity to integrate data for timely adjustment of public health measures.1, 2 Although some countries had little or no reliable data, others did not share data consistently with their own populations and with WHO and other multilateral agencies. The emergence of SARS-CoV-2 variants has highlighted inadequate national pathogen genomic sequencing capacities in many countries and led to calls for expanded virus sequencing. However, sequencing without epidemiological and clinical surveillance data is insufficient to show whether new SARS-CoV-2 variants are more transmissible, more lethal, or more capable of evading immunity, including vaccine-induced immunity.
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- 2021
35. Emerging Infectious Diseases - Learning from the Past and Looking to the Future
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Christopher Elias, John N Nkengasong, and Firdausi Qadri
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2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,business.industry ,Information Dissemination ,Pandemic preparedness ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,MEDLINE ,Historical Article ,COVID-19 ,General Medicine ,Hemorrhagic Fever, Ebola ,History, 20th Century ,medicine.disease ,Global Health ,Communicable Diseases, Emerging ,History, 21st Century ,Health Planning ,Communicable Disease Control ,Global health ,Medicine ,Humans ,Medical emergency ,business - Abstract
Emerging Infectious Diseases Remarkable progress has been made in preventing deaths from infectious diseases. Now, attention could shift to focusing more resources on pandemic preparedness, includi...
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- 2021
36. The first and second waves of the COVID-19 pandemic in Africa: a cross-sectional study
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John N. Nkengasong, Akhona Tshangela, Chikwe Ihekweazu, Ebba Abate, Mohamed Moussif, Senga Sembuche, Ahmed E Ogwell Ouma, Justin Maeda, Natalie Mayet, Yenew Kebede, and Stephanie J. Salyer
- Subjects
medicine.medical_specialty ,Cross-sectional study ,Distribution (economics) ,030204 cardiovascular system & hematology ,Article ,03 medical and health sciences ,COVID-19 Testing ,0302 clinical medicine ,Pandemic ,Epidemiology ,Case fatality rate ,medicine ,Humans ,030212 general & internal medicine ,Pandemics ,SARS-CoV-2 ,business.industry ,Incidence ,Incidence (epidemiology) ,Public health ,Comment ,COVID-19 ,General Medicine ,Cross-Sectional Studies ,Geography ,Population Surveillance ,Africa ,Observational study ,business ,Demography - Abstract
Summary Background Although the first wave of the COVID-19 pandemic progressed more slowly in Africa than the rest of the world, by December, 2020, the second wave appeared to be much more aggressive with many more cases. To date, the pandemic situation in all 55 African Union (AU) Member States has not been comprehensively reviewed. We aimed to evaluate reported COVID-19 epidemiology data to better understand the pandemic's progression in Africa. Methods We did a cross-sectional analysis between Feb 14 and Dec 31, 2020, using COVID-19 epidemiological, testing, and mitigation strategy data reported by AU Member States to assess trends and identify the response and mitigation efforts at the country, regional, and continent levels. We did descriptive analyses on the variables of interest including cumulative and weekly incidence rates, case fatality ratios (CFRs), tests per case ratios, growth rates, and public health and social measures in place. Findings As of Dec 31, 2020, African countries had reported 2 763 421 COVID-19 cases and 65 602 deaths, accounting for 3·4% of the 82 312 150 cases and 3·6% of the 1 798 994 deaths reported globally. Nine of the 55 countries accounted for more than 82·6% (2 283 613) of reported cases. 18 countries reported CFRs greater than the global CFR (2·2%). 17 countries reported test per case ratios less than the recommended ten to 30 tests per case ratio range. At the peak of the first wave in Africa in July, 2020, the mean daily number of new cases was 18 273. As of Dec 31, 2020, 40 (73%) countries had experienced or were experiencing their second wave of cases with the continent reporting a mean of 23 790 daily new cases for epidemiological week 53. 48 (96%) of 50 Member States had five or more stringent public health and social measures in place by April 15, 2020, but this number had decreased to 36 (72%) as of Dec 31, 2020, despite an increase in cases in the preceding month. Interpretation Our analysis showed that the African continent had a more severe second wave of the COVID-19 pandemic than the first, and highlights the importance of examining multiple epidemiological variables down to the regional and country levels over time. These country-specific and regional results informed the implementation of continent-wide initiatives and supported equitable distribution of supplies and technical assistance. Monitoring and analysis of these data over time are essential for continued situational awareness, especially as Member States attempt to balance controlling COVID-19 transmission with ensuring stable economies and livelihoods. Funding None.
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- 2021
37. COVID-19: unprecedented but expected
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John N. Nkengasong
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0301 basic medicine ,medicine.medical_specialty ,2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Global Health ,History, 21st Century ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,0302 clinical medicine ,Environmental health ,Pandemic ,Global health ,medicine ,Humans ,Pandemics ,Health Priorities ,SARS-CoV-2 ,Public health ,COVID-19 ,General Medicine ,History, 20th Century ,030104 developmental biology ,Geography ,030220 oncology & carcinogenesis ,Preparedness ,Public Health ,Public Health Administration ,Forecasting - Abstract
The COVID-19 pandemic provides an opportunity to reimagine preparedness for and responses to future pandemics.
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- 2021
38. Field expansion of DNA polymerase chain reaction for early infant diagnosis of HIV-1: The Ethiopian experience
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Peter Fonjungo, Mulu Girma, Zenebe Melaku, Teferi Mekonen, Amilcar Tanuri, Bereket Hailegiorgis, Belete Tegbaru, Yohannes Mengistu, Aytenew Ashenafi, Wubshet Mamo, Tesfay Abreha, Gudetta Tibesso, Artur Ramos, Gonfa Ayana, Richard Freeman, John N. Nkengasong, Solomon Zewdu, Yenew Kebede, Almaz Abebe, Thomas A. Kenyon, and Tsehaynesh Messele
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HIV, Early Infant Diagnosis, Dried Blood Spot, Polymerase Chain Reaction, Laboratory rollout, quality assurance ,Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
Background: Early diagnosis of infants infected with HIV (EID) and early initiation of treatment significantly reduces the rate of disease progression and mortality. One of the challengesto identification of HIV-1-infected infants is availability and/or access to quality molecular laboratory facilities which perform molecular virologic assays suitable for accurate identificationof the HIV status of infants. Method: We conducted a joint site assessment and designed laboratories for the expansion of DNA polymerase chain reaction (PCR) testing based on dried blood spot (DBS) for EID insix regions of Ethiopia. Training of appropriate laboratory technologists and development of required documentation including standard operating procedures (SOPs) was carried out. The impact of the expansion of EID laboratories was assessed by the number of tests performed as well as the turn-around time. Results: DNA PCR for EID was introduced in 2008 in six regions. From April 2006 to April 2008, a total of 2848 infants had been tested centrally at the Ethiopian Health and Nutrition Research Institute (EHNRI) in Addis Ababa, and which was then the only laboratory with the capability to perform EID; 546 (19.2%) of the samples were positive. By November 2010, EHNRI and the six laboratories had tested an additional 16 985 HIV-exposed infants, of which 1915 (11.3%) were positive. The median turn-around time for test results was 14 days (range 14−21 days). Conclusion: Expansion of HIV DNA PCR testing facilities that can provide quality and reliable results is feasible in resource-limited settings. Regular supervision and monitoring for quality assurance of these laboratories is essential to maintain accuracy of testing.
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- 2013
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39. Fear and depression during the COVID-19 outbreak in Cameroon : a nation-wide observational study
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Cyrille Nkouonlack, Jean-Marie Annoni, Eric Samuel Chokote, Godwin Y. Tatah, Rose G. F. Leke, Dickson Shey Nsagha, Roman Sztajzel, Paul F. Seke Etet, John N. Nkengasong, Nene Ahidjo, Edwige Laure Mendo, Nancy Palmer, Samuel A. Angwafor, Alfred K. Njamnshi, Dennis Palmer, Robert Colebunders, Leonard Ngarka, Leonard N. Nfor, Marie-Therese Obama, Julius Y. Fonsah, Anne-Cécile Zoung-Kanyi Bissek, Fidèle Dema, Daniel E. Etya’ale, Stephen Perrig, Edith N. Njit, Wepnyu Y. Njamnshi, Jonas Guy Atchou Basseguin, Michel K. Mengnjo, and Joseph Nelson Siewe Fodjo
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Adult ,Male ,Multivariate analysis ,FCV-19S ,RC435-571 ,Odds ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Humans ,030212 general & internal medicine ,Cameroon ,Pandemics ,Depression (differential diagnoses) ,Psychiatry ,business.industry ,Depression ,SARS-CoV-2 ,Research ,Outbreak ,COVID-19 ,Fear ,PHQ-9 ,Patient Health Questionnaire ,Psychiatry and Mental health ,Distress ,Anxiety ,Observational study ,Female ,Human medicine ,medicine.symptom ,business ,030217 neurology & neurosurgery ,Demography - Abstract
BackgroundThe COVID-19 pandemic has been associated with significant psychological and social distress worldwide. We investigated fear and depression among adults in Cameroon during different phases of the COVID-19 outbreak.MethodsAn online survey was conducted in Cameroon from June–December 2020 using a structured questionnaire. Socio-demographic data and information regarding COVID-19 history were obtained. Fear and depressive symptoms were assessed using the Fear of COVID-19 score (FCV-19S) and the Patient Health Questionnaire (PHQ-9), respectively. Responses were clustered in weeks to better appreciate their evolution over time.ResultsOverall, 7381 responses from all ten regions of Cameroon were analysed (median age: 30 years, 73.3% male). The prevalence of depression (PHQ-9 score ≥ 10) was 8.4%, and that of high fear of COVID-19 (FCV-19S scores ≥19) was 57.4%. These rates were similar across genders, age-groups, and region of residence. While mean weekly PHQ-9 scores remained fairly stable throughout the study period (range: 2.53–3.21;p = 0.101), mean FCV-19S scores were highest during the early weeks but decreased significantly thereafter (from 20.31 to 18.34;p ConclusionDepression amidst the COVID-19 crisis is less prevalent in Cameroon than in other countries. Prompt and widespread dissemination of adequate COVID-19 information may reduce the risks for depression by dispelling fear and anxiety among Cameroonians.
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- 2021
40. The puzzle of the COVID-19 pandemic in Africa
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John N. Nkengasong and Justin Maeda
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2019-20 coronavirus outbreak ,medicine.medical_specialty ,Multidisciplinary ,Coronavirus disease 2019 (COVID-19) ,SARS-CoV-2 ,Epidemiology ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Immunology ,COVID-19 ,Blood Donors ,Seroepidemiologic Studies ,Virology ,Kenya ,Geography ,Immunoglobulin G ,Report ,Pandemic ,medicine ,Humans ,Pandemics ,Reports - Abstract
Pandemic progress in Kenya By the end of July 2020, Kenya had reported only 341 deaths and ∼20,000 cases of COVID-19. This is in marked contrast to the tens of thousands of deaths reported in many higher-income countries. The true extent of COVID-19 in the community was unknown and likely to be higher than reports indicated. Uyoga et al. found an overall seroprevalence among blood donors of 4.3%, peaking in 35- to 44-year-old individuals (see the Perspective by Maeda and Nkengasong). The low mortality can be partly explained by the steep demographics in Kenya, where less than 4% of the population is 65 or older. These circumstances combine to result in Kenyan hospitals not currently being overwhelmed by patients with respiratory distress. However, the imposition of a strict lockdown in this country has shifted the disease burden to maternal and child deaths as a result of disruption to essential medical services. Science, this issue p. 79; see also p. 27, By May 2020, 1 in 20 Kenyan adults had SARS-CoV-2 antibodies, when fewer than 100 COVID-19 deaths had been reported nationally., The spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in Africa is poorly described. The first case of SARS-CoV-2 in Kenya was reported on 12 March 2020, and an overwhelming number of cases and deaths were expected, but by 31 July 2020, there were only 20,636 cases and 341 deaths. However, the extent of SARS-CoV-2 exposure in the community remains unknown. We determined the prevalence of anti–SARS-CoV-2 immunoglobulin G among blood donors in Kenya in April–June 2020. Crude seroprevalence was 5.6% (174 of 3098). Population-weighted, test-performance-adjusted national seroprevalence was 4.3% (95% confidence interval, 2.9 to 5.8%) and was highest in urban counties Mombasa (8.0%), Nairobi (7.3%), and Kisumu (5.5%). SARS-CoV-2 exposure is more extensive than indicated by case-based surveillance, and these results will help guide the pandemic response in Kenya and across Africa.
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- 2021
41. Adherence to COVID-19 Preventive Measures Prior to Vaccine Interventions: A Meta-Analysis of Online Surveys in Sub-Saharan Africa
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Rhoda Kitti Wanyenze, Dula J, John Ditekemena, Wepnyu Y. Njamnshi, John N. Nkengasong, Ahmed Ma, Christian T. Happi, Fodjo Jns, Philippe Sessou, Alfred K. Njamnshi, Leonard Ngarka, and Robert Colebunders
- Subjects
medicine.medical_specialty ,business.industry ,media_common.quotation_subject ,Psychological intervention ,Declaration ,Neglect ,Negative relationship ,Hygiene ,Family medicine ,Meta-analysis ,Health care ,medicine ,Confidentiality ,business ,media_common - Abstract
Background: Little is known regarding the observance of the non-pharmaceutical measures implemented to curtail COVID-19 transmission in Sub-Saharan Africa (SSA). Recent deployment of COVID-19 vaccines may lead to a neglect of these still needed non-pharmaceutical strategies. We investigated adherence to preventive measures during the initial six months of the COVID-19 outbreak in SSA. Methods: Between March and August 2020, online surveys were conducted in six SSA countries: Benin, Cameroon, Democratic Republic of Congo, Mozambique, Somalia and Uganda. A five-point individual adherence score was constituted by scoring respondents’ observance of the following: mask use, physical distancing, hand hygiene, coughing hygiene, and avoiding to touch one’s face. To take into account community preventive measures, we also proposed a modified adherence score. Data was analysed in two time periods: Period 1 (March-May) and Period 2 (June-August). Findings: Responses from 26,678 respondents were analysed (mean age: 31.0±11.1y; 54.1% males). Mean individual adherence score decreased from 3.80±1.37 during Period 1, to 3.57±1.43 during Period 2; p
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- 2021
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42. Molecular characterization of ambiguous mutations in HIV-1 polymerase gene: implications for monitoring HIV infection status and drug resistance.
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Du-Ping Zheng, Margarida Rodrigues, Ebi Bile, Duc B Nguyen, Karidia Diallo, Joshua R DeVos, John N Nkengasong, and Chunfu Yang
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Medicine ,Science - Abstract
Detection of recent HIV infections is a prerequisite for reliable estimations of transmitted HIV drug resistance (t-HIVDR) and incidence. However, accurately identifying recent HIV infection is challenging due partially to the limitations of current serological tests. Ambiguous nucleotides are newly emerged mutations in quasispecies, and accumulate by time of viral infection. We utilized ambiguous mutations to establish a measurement for detecting recent HIV infection and monitoring early HIVDR development. Ambiguous nucleotides were extracted from HIV-1 pol-gene sequences in the datasets of recent (HIVDR threshold surveys [HIVDR-TS] in 7 countries; n=416) and established infections (1 HIVDR monitoring survey at baseline; n=271). An ambiguous mutation index of 2.04×10(-3) nts/site was detected in HIV-1 recent infections which is equivalent to the HIV-1 substitution rate (2×10(-3) nts/site/year) reported before. However, significantly higher index (14.41×10(-3) nts/site) was revealed with established infections. Using this substitution rate, 75.2% subjects in HIVDR-TS with the exception of the Vietnam dataset and 3.3% those in HIVDR-baseline were classified as recent infection within one year. We also calculated mutation scores at amino acid level at HIVDR sites based on ambiguous or fitted mutations. The overall mutation scores caused by ambiguous mutations increased (0.54×10(-2)3.48×10(-2)/DR-site) whereas those caused by fitted mutations remained stable (7.50-7.89×10(-2)/DR-site) in both recent and established infections, indicating that t-HIVDR exists in drug-naïve populations regardless of infection status in which new HIVDR continues to emerge. Our findings suggest that characterization of ambiguous mutations in HIV may serve as an additional tool to differentiate recent from established infections and to monitor HIVDR emergence.
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- 2013
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43. Redesigning health systems for global heath security
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Abdulaziz Mohammed, Deborah R Malac, Matshidiso Moeti, Juliet Nabyonga-Orem, Uzma Alam, and John N. Nkengasong
- Subjects
Knowledge management ,Biomedical Research ,National Health Programs ,business.industry ,Health Policy ,COVID-19 ,General Medicine ,Hemorrhagic Fever, Ebola ,Global Health ,Cholera ,Political science ,Patient-Centered Care ,Africa ,Yellow Fever ,Chikungunya Fever ,Humans ,business ,Epidemics ,Delivery of Health Care ,Healthcare system - Published
- 2020
44. COVID-19 vaccines: how to ensure Africa has access
- Author
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Tajudeen Raji, Nicaise Ndembi, John N. Nkengasong, and Akhona Tshangela
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0301 basic medicine ,03 medical and health sciences ,Government ,Economic growth ,2019-20 coronavirus outbreak ,030104 developmental biology ,0302 clinical medicine ,Multidisciplinary ,Coronavirus disease 2019 (COVID-19) ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,030212 general & internal medicine ,Business - Abstract
History must not repeat itself — global and continental cooperation are essential. History must not repeat itself — global and continental cooperation are essential.
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- 2020
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45. Africa Needs a New Public Health Order to Tackle Infectious Disease Threats
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Sofonias K. Tessema and John N. Nkengasong
- Subjects
medicine.medical_specialty ,2019-20 coronavirus outbreak ,Economic growth ,International Cooperation ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,education ,Disease ,Biology ,Communicable Diseases ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,0302 clinical medicine ,Order (exchange) ,Pandemic ,medicine ,Humans ,Health Workforce ,030304 developmental biology ,0303 health sciences ,Public health ,Health Occupations ,Infectious disease (medical specialty) ,Africa ,Communicable Disease Control ,Commentary ,Public Health ,Public Health Administration ,030217 neurology & neurosurgery ,Public health workforce - Abstract
The SARS-CoV-2 pandemic has revealed that Africa needs a new public health order to be resilient, to adapt, and to cope with 21st-century disease threats. The new order will need strengthened continental and national public health institutions; local manufacturing of vaccines, therapeutics, and diagnostics; attraction, training, and retention of a public health workforce; and fostering of respectful local and international partnerships., The SARS-CoV-2 pandemic has revealed that Africa needs a new public health order to be resilient, adapt, and cope with 21st-century disease threats. The new order will need strengthened continental and national public health institutions; local manufacturing of vaccines, therapeutics, and diagnostics; attraction, training, and retention of a public health workforce; and fostering of respectful local and international partnerships.
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- 2020
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46. Genomic-informed pathogen surveillance in Africa: opportunities and challenges
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John N. Nkengasong, Yenew Kebede, Seth C Inzaule, Sofonias K. Tessema, and Ahmed E Ogwell Ouma
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0301 basic medicine ,medicine.medical_specialty ,Capacity Building ,Emerging technologies ,Best practice ,03 medical and health sciences ,0302 clinical medicine ,Public health surveillance ,Pandemic ,medicine ,Disease Transmission, Infectious ,Humans ,Public Health Surveillance ,030212 general & internal medicine ,Environmental planning ,Disease surveillance ,Personal View ,Public health ,Capacity building ,High-Throughput Nucleotide Sequencing ,Genomics ,Leadership ,030104 developmental biology ,Infectious Diseases ,Policy ,Preparedness ,Africa ,Communicable Disease Control ,Workforce ,Business ,Laboratories - Abstract
The ongoing COVID-19 pandemic has highlighted the need to incorporate pathogen genomics for enhanced disease surveillance and outbreak management in Africa. The genomics of SARS-CoV-2 has been instrumental to the timely development of diagnostics and vaccines and in elucidating transmission dynamics. Global disease control programmes, including those for tuberculosis, malaria, HIV, foodborne pathogens, and antimicrobial resistance, also recommend genomics-based surveillance as an integral strategy towards control and elimination of these diseases. Despite the potential benefits, capacity remains low for many public health programmes in Africa. The COVID-19 pandemic presents an opportunity to reassess and strengthen surveillance systems and potentially integrate emerging technologies for preparedness of future epidemics and control of endemic diseases. We discuss opportunities and challenges for integrating pathogen genomics into public health surveillance systems in Africa. Improving accessibility through the creation of functional continent-wide networks, building multipathogen sequencing cores, training a critical mass of local experts, development of standards and policies to facilitate best practices for data sharing, and establishing a community of practice of genomics experts are all needed to use genomics for improved disease surveillance in Africa. Coordination and leadership are also crucial, which the Africa Centres for Disease Control and Prevention seeks to provide through its institute for pathogen genomics.
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- 2020
47. Need for sustainable biobanking networks for COVID-19 and other diseases of epidemic potential
- Author
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Rosanna W. Peeling, Annelies Wilder-Smith, Debrah I. Boeras, Amadou A. Sall, and John N. Nkengasong
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0301 basic medicine ,Guiding Principles ,International Cooperation ,Pneumonia, Viral ,030106 microbiology ,Communicable Diseases ,Specimen Handling ,Betacoronavirus ,03 medical and health sciences ,0302 clinical medicine ,Global network ,Humans ,030212 general & internal medicine ,Nagoya Protocol ,Epidemics ,Pandemics ,Environmental planning ,Biological Specimen Banks ,Sustainable development ,Diagnostic Tests, Routine ,SARS-CoV-2 ,COVID-19 ,Sustainable Development ,Biobank ,Transparency (behavior) ,Infectious Diseases ,Preparedness ,Communicable Disease Control ,Sustainability ,Business ,Coronavirus Infections - Abstract
Outbreaks of infectious diseases are occurring with increasing frequency and unpredictability. The rapid development and deployment of diagnostics that can accurately and quickly identify pathogens as part of epidemic preparedness is needed now for the COVID-19 pandemic. WHO has developed a global research and innovation forum to facilitate, accelerate, and deepen research collaboration among countries and funders. Great progress has been made in the past decade, but access to specimens remains a major barrier for the development and evaluation of needed quality diagnostics. We present a sustainable model for a global network of country-owned biobanks with standardised methods for collection, characterisation, and archiving of specimens and pathogens to facilitate and accelerate diagnostics development and evaluation for COVID-19 and other diseases of epidemic potential. The biobanking network should be run on the guiding principles of transparency, equitable access, ethics, and respect for national laws that support country ownership and sustainability. Adapting the Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits, sharing of specimens from national biobanks can be rewarded through mechanisms such as equitable access to diagnostics at negotiated prices. Such networks should be prepared for any pathogen of epidemic potential.
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- 2020
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48. Serology testing in the COVID-19 pandemic response
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John N. Nkengasong, Amadou A. Sall, Catherine J. Wedderburn, Amilcar Tanuri, Rosanna W. Peeling, Patricia J. Garcia, David L Heymann, Noah Fongwen, and Debrah I. Boeras
- Subjects
0301 basic medicine ,medicine.medical_specialty ,Time Factors ,media_common.quotation_subject ,Pneumonia, Viral ,purl.org/pe-repo/ocde/ford#3.03.08 [https] ,Antibodies, Viral ,Article ,Serology ,Scarcity ,Betacoronavirus ,03 medical and health sciences ,COVID-19 Testing ,0302 clinical medicine ,pandemic response ,Pandemic ,medicine ,Humans ,030212 general & internal medicine ,Pandemics ,media_common ,Clinical Laboratory Techniques ,SARS-CoV-2 ,business.industry ,Public health ,COVID-19 ,medicine.disease ,Triage ,Virus Shedding ,Test (assessment) ,030104 developmental biology ,Infectious Diseases ,Immunoglobulin M ,Immunoglobulin G ,Scale (social sciences) ,RNA, Viral ,Medical emergency ,Contact Tracing ,Coronavirus Infections ,business ,Situation analysis ,Serology testing - Abstract
Summary The collapse of global cooperation and a failure of international solidarity have led to many low-income and middle-income countries being denied access to molecular diagnostics in the COVID-19 pandemic response. Yet the scarcity of knowledge on the dynamics of the immune response to infection has led to hesitation on recommending the use of rapid immunodiagnostic tests, even though rapid serology tests are commercially available and scalable. On the basis of our knowledge and understanding of viral infectivity and host response, we urge countries without the capacity to do molecular testing at scale to research the use of serology tests to triage symptomatic patients in community settings, to test contacts of confirmed cases, and in situational analysis and surveillance. The WHO R&D Blue Print expert group identified eight priorities for research and development, of which the highest is to mobilise research on rapid point-of-care diagnostics for use at the community level. This research should inform control programmes of the required performance and utility of rapid serology tests, which, when applied specifically for appropriate public health measures to then be put in place, can make a huge difference.
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- 2020
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49. Preparing national tiered laboratory systems and networks to advance diagnostics in Africa and meet the continent’s health agenda: Insights into priority areas for improvement
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Amha Kebede, Pascale Ondoa, Mah Sere Keita, John N. Nkengasong, Aytenew Ashenafi, Collins Odhiambo, Teferi Mekonen, Nqobile Ndlovu, Marguerite Massinga-Loembe, and Yenew Kebede
- Subjects
2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,uptake of diagnostic technology ,lcsh:Public aspects of medicine ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,030231 tropical medicine ,Clinical Biochemistry ,Public Health, Environmental and Occupational Health ,MEDLINE ,health ,lcsh:RA1-1270 ,Priority areas ,laboratory networks ,03 medical and health sciences ,Medical Laboratory Technology ,0302 clinical medicine ,laboratory systems ,africa ,Opinion Paper ,030212 general & internal medicine ,Business ,Environmental planning - Abstract
No abstract available.
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- 2020
50. Accelerating genomics-based surveillance for COVID-19 response in Africa
- Author
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John N. Nkengasong, Alan Christoffels, Ahmed E Ogwell Ouma, Seth C Inzaule, Sofonias K. Tessema, Yenew Kebede, Tulio de Oliveira, and Christian T. Happi
- Subjects
Microbiology (medical) ,lcsh:R5-920 ,2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,SARS-CoV-2 ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,lcsh:QR1-502 ,MEDLINE ,COVID-19 ,Genomics ,Microbiology ,Virology ,lcsh:Microbiology ,Article ,Infectious Diseases ,Geography ,Africa ,Humans ,Public Health Surveillance ,lcsh:Medicine (General) - Published
- 2020
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