122 results on '"Sambo, Maganga"'
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2. Understanding Reservoirs of Multi-Host Pathogens: A One Health Approach to Rabies in Tanzania
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Hayes, Sarah, Lushasi, Kennedy, Changalucha, Joel, Czupryna, Anna, Ferguson, Elaine, Lankester, Felix, Lugelo, Ahmed, Sambo, Maganga, Sikana, Lwitiko, A. Donnelly, Christl, and Hampson, Katie
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- 2025
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3. Perspectives of African stakeholders on gene drives for malaria control and elimination: a multi-country survey
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Finda, Marceline F., Juma, Elijah O., Kahamba, Najat F., Mthawanji, Rhosheen S., Sambo, Maganga, Emidi, Basiliana, Wiener, Susan, O’Brochta, David, Santos, Michael, James, Stephanie, and Okumu, Fredros O.
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- 2023
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4. Testing novel facial recognition technology to identify dogs during vaccination campaigns
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Czupryna, Anna Maria, Estepho, Mike, Lugelo, Ahmed, Bigambo, Machunde, Sambo, Maganga, Changalucha, Joel, Lushasi, Kennedy Selestin, Rooyakkers, Philip, Hampson, Katie, and Lankester, Felix
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- 2023
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5. Measuring, monitoring and improving mass dog vaccination programmes to control and eliminate rabies
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Sambo, Maganga
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616.95 ,Q Science (General) ,SF600 Veterinary Medicine - Abstract
Rabies is an acute viral infection which causes horrifying neurological symptoms that inevitably result in death. Every year at least 59,000 people are estimated to die from rabies and more than 10 million are treated with post-exposure prophylaxis (PEP). Over 90% of human rabies deaths occur in Asia and Africa following bites from domestic dogs. Although human rabies deaths are 100% preventable through the delivery of prompt PEP to bite victims following a bite, PEP is not accessible to many poor rural victims, most of whom subsist on less than US$1.25/day. Empirical and theoretical evidence shows that mass dog vaccination that reaches 70% of susceptible dog population can interrupt the transmission cycle. Rabies has been eliminated from industrialized countries through mass dog vaccination, and the continent-wide elimination of canine rabies from the Americas is now within reach. In contrast, no effective large-scale control of dog rabies has been achieved in Africa and information is still needed to optimise and sustain dog vaccination programmes. The aim of this thesis was to evaluate the rabies control programme in Tanzania. This thesis is presented as a series of three standalone chapters (Chapters 2-4) that are introduced and then summarised by a general introduction (Chapter 1) and a general discussion (Chapter 5) respectively. Achieving high coverage is the most important aim of any vaccination programme; however, assessing the vaccination coverage achieved is often neglected in rabies endemic countries. In Chapter 2, I compare three methods of measuring vaccination coverage (post-vaccination transects, school-based surveys, and household surveys) across 28 districts in different settings in southeast Tanzania and Pemba island in order to determine which is most precise method. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance in producing precise estimates of coverage was compared with a complete dog population census that also recorded dog vaccination status. Our analysis found that transect studies (counting vaccinated and unvaccinated dogs) immediately after the campaign is cheap, quick, and provides precise estimates. Therefore, transects were considered more appropriate for routine monitoring of mass vaccination campaigns than household or school-based surveys. In Chapter 3, I used data from Chapter 2 together with human population census data from Tanzanian Bureau of Statistics to develop a model for estimation of the size of dog populations in Tanzania. Knowledge of the size of the dog population is necessary to adequately plan and achieve the target of vaccinating 70% of susceptible dogs. I demonstrate that estimating dog population size using transect data gave more precise results than either household or school-based surveys. Therefore, transect data were used to develop a predictive model for estimating dog populations in districts lacking transect data. Using this model, I predict a dog population of 2.32 (95% CI 1.57,3.12) million in Tanzania and an average human to dog ratio of 20.7:1. In Chapter 4, I evaluate the implementation and performance of large-scale dog vaccination campaigns against rabies in Tanzania. For an effective rabies control and elimination, it is necessary to conduct vaccination campaigns in every village/street (completeness), achieve coverage of 70% (coverage) and return for dog vaccination within one year (timeliness). Therefore, in this Chapter 4, I assessed vaccination campaigns in terms of completeness, coverage and timeliness; I also investigated factors associated with and potentially causing success or failure of mass dog vaccinations, in terms of completeness and coverage. Overall, this study shows that Tanzania experienced notable challenges in the delivery of mass dog vaccinations. For example, although vaccination completeness improved over time, until the last two rounds of vaccinations, only 25% of districts had 100% campaigns completeness. Additionally, very few districts (27-36% of the study districts) achieved the recommended vaccination coverage of 70% between third and fifth round of vaccinations. Vaccination interval was planned to be annually but vaccinations delayed to more than two years, as a result, vaccinations were conducted in pulsed approach (not annually).
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- 2020
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6. One Health gains momentum in Africa but room exists for improvement
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Fasina, Folorunso O., Bett, Bernard, Dione, Michel, Mutua, Florence, Roesel, Kristina, Thomas, Lian, Kwoba, Emmah, Ayebazibwe, Chrisistom, Mtika, Nebart, Gebeyehu, Daniel T., Mtui-Malamsha, Niwael, Sambo, Maganga, Swai, Emmanuel S., and Bebay, Charles
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- 2022
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7. Tackling barriers to collective action for effective vaccination campaigns: rabies in rural Africa as an example
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Lim, Putthi Cheat, Lembo, Tiziana, Hampson, Katie, Changalucha, Joel, Sambo, Maganga, and Ghosal, Sayantan
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- 2022
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8. Understanding the incidence and timing of rabies cases in domestic animals and wildlife in south-east Tanzania in the presence of widespread domestic dog vaccination campaigns
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Hayes, Sarah, Lushasi, Kennedy, Sambo, Maganga, Changalucha, Joel, Ferguson, Elaine A., Sikana, Lwitiko, Hampson, Katie, Nouvellet, Pierre, and Donnelly, Christl A.
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- 2022
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9. Factors associated with poor compliance to rabies post-exposure prophylaxis among dog bite victims in Maswa District in Tanzania: a cross-sectional study
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Walwa, Budodi Walwa, primary, Kimaro, Esther Gwae, additional, Mpolya, Emmanuel Abraham, additional, and Sambo, Maganga, additional
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- 2024
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10. Perspectives of African Stakeholders on Gene Drives for Malaria Control and Elimination: A Multi-Country Survey
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Finda, Marceline F., primary, Juma, Elijah O., additional, Kahamba, Najat F., additional, Mthawanji, Rhosheen S., additional, Sambo, Maganga, additional, Emidi, Basiliana, additional, Wiener, Susan, additional, O’Brochta, David, additional, Santos, Michael, additional, James, Stephanie, additional, and O, Okumu Fredros, additional
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- 2023
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11. Integrating contact tracing and whole-genome sequencing to track the elimination of dog-mediated rabies: an observational and genomic study
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Lushasi, Kennedy, primary, Brunker, Kirstyn, additional, Rajeev, Malavika, additional, Ferguson, Elaine A, additional, Jaswant, Gurdeep, additional, Baker, Laurie Louise, additional, Biek, Roman, additional, Changalucha, Joel, additional, Cleaveland, Sarah, additional, Czupryna, Anna, additional, Fooks, Anthony R, additional, Govella, Nicodemus J, additional, Haydon, Daniel T, additional, Johnson, Paul CD, additional, Kazwala, Rudovick, additional, Lembo, Tiziana, additional, Marston, Denise, additional, Masoud, Msanif, additional, Maziku, Matthew, additional, Mbunda, Eberhard, additional, Mchau, Geofrey, additional, Mohamed, Ally Z, additional, Mpolya, Emmanuel, additional, Ngeleja, Chanasa, additional, Ng'habi, Kija, additional, Nonga, Hezron, additional, Omar, Kassim, additional, Rysava, Kristyna, additional, Sambo, Maganga, additional, Sikana, Lwitiko, additional, Steenson, Rachel, additional, and Hampson, Katie, additional
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- 2023
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12. Additional file 2 of Understanding the incidence and timing of rabies cases in domestic animals and wildlife in south-east Tanzania in the presence of widespread domestic dog vaccination campaigns
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Hayes, Sarah, Lushasi, Kennedy, Sambo, Maganga, Changalucha, Joel, Ferguson, Elaine A., Sikana, Lwitiko, Hampson, Katie, Nouvellet, Pierre, and Donnelly, Christl A.
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Additional file 2. Vaccination coverage estimates. Estimates for each district for each year during which vaccination campaigns were undertaken. Details of the timings of the vaccination campaign are given for each year.
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- 2023
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13. Additional file 3 of Understanding the incidence and timing of rabies cases in domestic animals and wildlife in south-east Tanzania in the presence of widespread domestic dog vaccination campaigns
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Hayes, Sarah, Lushasi, Kennedy, Sambo, Maganga, Changalucha, Joel, Ferguson, Elaine A., Sikana, Lwitiko, Hampson, Katie, Nouvellet, Pierre, and Donnelly, Christl A.
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Additional file 3. Results of generalized linear models for the incidence of probable domestic dog rabies cases from models containing the mean domestic dog vaccination coverage from two years before cases occurred. The 95% confidence intervals for the estimates are shown in square brackets [].
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- 2023
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14. Additional file 5 of Understanding the incidence and timing of rabies cases in domestic animals and wildlife in south-east Tanzania in the presence of widespread domestic dog vaccination campaigns
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Hayes, Sarah, Lushasi, Kennedy, Sambo, Maganga, Changalucha, Joel, Ferguson, Elaine A., Sikana, Lwitiko, Hampson, Katie, Nouvellet, Pierre, and Donnelly, Christl A.
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Additional file 5. Results of generalized linear models for the incidence of probable jackal rabies cases from models containing the mean domestic dog vaccination coverage from two years before cases occurred. The 95% confidence intervals for the estimates are shown in square brackets [].
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- 2023
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15. Additional file 1 of Understanding the incidence and timing of rabies cases in domestic animals and wildlife in south-east Tanzania in the presence of widespread domestic dog vaccination campaigns
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Hayes, Sarah, Lushasi, Kennedy, Sambo, Maganga, Changalucha, Joel, Ferguson, Elaine A., Sikana, Lwitiko, Hampson, Katie, Nouvellet, Pierre, and Donnelly, Christl A.
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Additional file 1. Location of the probable animal rabies cases used within the subset analysis. Probable animal rabies cases are shown as black diamonds and include all species. The cases considered within the subset analysis are those located in the region outlined in blue. All cases included within the subset are within 10 km of another case.
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- 2023
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16. Additional file 4 of Understanding the incidence and timing of rabies cases in domestic animals and wildlife in south-east Tanzania in the presence of widespread domestic dog vaccination campaigns
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Hayes, Sarah, Lushasi, Kennedy, Sambo, Maganga, Changalucha, Joel, Ferguson, Elaine A., Sikana, Lwitiko, Hampson, Katie, Nouvellet, Pierre, and Donnelly, Christl A.
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Additional file 4. Results of generalized linear models for the incidence of probable domestic dog rabies cases from models containing the mean domestic dog vaccination coverage from three years before cases occurred. The 95% confidence intervals for the estimates are shown in square brackets [].
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- 2023
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17. Additional file 6 of Understanding the incidence and timing of rabies cases in domestic animals and wildlife in south-east Tanzania in the presence of widespread domestic dog vaccination campaigns
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Hayes, Sarah, Lushasi, Kennedy, Sambo, Maganga, Changalucha, Joel, Ferguson, Elaine A., Sikana, Lwitiko, Hampson, Katie, Nouvellet, Pierre, and Donnelly, Christl A.
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Additional file 6. Results of generalized linear models for the incidence of probable jackal rabies cases from models containing the mean domestic dog vaccination coverage from three years before cases occurred. The 95% confidence intervals for the estimates are shown in square brackets [].
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- 2023
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18. Integrating contact tracing and whole-genome sequencing to track the elimination of dog-mediated rabies
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Lushasi, Kennedy, primary, Brunker, Kirstyn, additional, Rajeev, Malavika, additional, Ferguson, Elaine A, additional, Jaswant, Gurdeep, additional, Baker, Laurie, additional, Biek, Roman, additional, Changalucha, Joel, additional, Cleaveland, Sarah, additional, Czupryna, Anna, additional, Fooks, Anthony R, additional, Govella, Nicodemus, additional, Haydon, Daniel T, additional, Johnson, Paul, additional, Kazwala, Rudovick, additional, Lembo, Tiziana, additional, Marston, Denise, additional, Masoud, Msanif, additional, Maziku, Mathew, additional, Mbunda, Eberhard, additional, Mchau, Geofrey, additional, Mohamed, Ally Z, additional, Mpolya, Emmanuel, additional, Ngeleja, Chanasa, additional, Ng’abhi, Kija, additional, Nonga, Hesron, additional, Omar, Khasim, additional, Rysava, Kristyna, additional, Sambo, Maganga, additional, Sikana, Lwitiko, additional, Steenson, Rachel, additional, and Hampson, Katie, additional
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- 2022
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19. Rabies intervention in Tanzania: An innovative animal vaccination model to train One Health focused student workforces to control and eliminate rabies
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Sambo, Maganga, primary, Mahiti, Gladys R., additional, Mohamed, Hussein, additional, Bernard, Jubilate, additional, Coetzer, Andre, additional, Felix, Albert K, additional, Kakoko, Deodatus, additional, Kimboka, Juma E, additional, Mtui-Malamsha, Niwael, additional, Mbunde, Mourice V, additional, Ngou, Athanas A, additional, Nanai, Alphoncina, additional, Nonga, Hezron Emmanuel, additional, Saidi, Khadija, additional, Samson, Richard, additional, Sanga, Valentina, additional, Mdeg, Robinson, additional, Nel, Louis H, additional, Fasina, Folorunso O., additional, and Killewo, Japhet, additional
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- 2022
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20. Scaling-up the delivery of dog vaccination campaigns against rabies in Tanzania
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Sambo, Maganga, primary, Ferguson, Elaine A., additional, Abela-Ridder, Bernadette, additional, Changalucha, Joel, additional, Cleaveland, Sarah, additional, Lushasi, Kennedy, additional, Mchau, Geofrey Joseph, additional, Nanai, Alphoncina, additional, Nonga, Hezron, additional, Steenson, Rachel, additional, Johnson, Paul CD, additional, and Hampson, Katie, additional
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- 2022
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21. Tracking the Elimination of Dog-Mediated Rabies from Pemba Island, Tanzania: An Observational Study
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Lushasi, Kennedy, primary, Brunker, Kirstyn, additional, Rajeev, Malavika, additional, Ferguson, Elaine A., additional, Jaswant, Gurdeep, additional, Baker, Laurie, additional, Biek, Roman, additional, Changalucha, Joel, additional, Cleaveland, Sarah, additional, Czupryna, Anna, additional, Fooks, Anthony R., additional, Govella, Nicodemus, additional, Haydon, Daniel T., additional, Johnson, Paul CD, additional, Kazwala, Rudovick, additional, Lembo, Tiziana, additional, Marston, Denise, additional, Masoud, Msanif, additional, Maziku, Mathew, additional, Mbunda, Eberhard, additional, Mchau, Geofrey, additional, Mohamed, Ally Z., additional, Mpolya, Emmanuel, additional, Ngeleja, Chanasa, additional, Ng’abhi, Kija, additional, Nonga, Hesron, additional, Omar, Khasim, additional, Rysava, Kristyna, additional, Sambo, Maganga, additional, Sikana, Lwitiko, additional, Steenson, Rachel, additional, and Hampson, Katie, additional
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- 2022
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22. Reservoir dynamics of rabies in south‐east Tanzania and the roles of cross‐species transmission and domestic dog vaccination
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Lushasi, Kennedy, primary, Hayes, Sarah, additional, Ferguson, Elaine A., additional, Changalucha, Joel, additional, Cleaveland, Sarah, additional, Govella, Nicodem J., additional, Haydon, Daniel T., additional, Sambo, Maganga, additional, Mchau, Geofrey J., additional, Mpolya, Emmanuel A., additional, Mtema, Zacharia, additional, Nonga, Hezron E., additional, Steenson, Rachel, additional, Nouvellet, Pierre, additional, Donnelly, Christl A., additional, and Hampson, Katie, additional
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- 2021
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23. Use of lay vaccinators in animal vaccination programmes: A scoping review
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Duamor, Christian Tetteh, primary, Hampson, Katie, additional, Lankester, Felix, additional, Sambo, Maganga, additional, Kreppel, Katharina, additional, Wyke, Sally, additional, and Cleaveland, Sarah, additional
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- 2021
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24. Dog ownership practices and responsibilities for children’s health in terms of rabies control and prevention in rural communities in Tanzania
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Sikana, Lwitiko, primary, Lembo, Tiziana, additional, Hampson, Katie, additional, Lushasi, Kennedy, additional, Mtenga, Sally, additional, Sambo, Maganga, additional, Wight, Daniel, additional, Coutts, Jane, additional, and Kreppel, Katharina, additional
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- 2021
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25. Mobile Phones As Surveillance Tools: Implementing and Evaluating a Large-Scale Intersectoral Surveillance System for Rabies in Tanzania
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Mtema, Zacharia, Changalucha, Joel, Cleaveland, Sarah, Elias, Martin, Ferguson, Heather M., Halliday, Jo E. B., Haydon, Daniel T., Jaswant, Gurdeep, Kazwala, Rudovick, Killeen, Gerry F., Lembo, Tiziana, Lushasi, Kennedy, Malishee, Alpha D., Mancy, Rebecca, Maziku, Matthew, Mbunda, Eberhard M., Mchau, Geofrey J. M., Murray-Smith, Roderick, Rysava, Kristyna, Said, Khadija, Sambo, Maganga, Shayo, Elizabeth, Sikana, Lwitiko, Townsend, Sunny E, Urassa, Honorathy, and Hampson, Katie
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Electronic surveillance -- Usage ,Wireless telephones -- Usage ,Rabies -- Diagnosis -- Research ,Wireless telephone ,Wireless voice/data device ,Biological sciences - Abstract
Author(s): Zacharia Mtema 1,2,3, Joel Changalucha 1, Sarah Cleaveland 2, Martin Elias 4, Heather M. Ferguson 1,2, Jo E. B. Halliday 2, Daniel T. Haydon 2, Gurdeep Jaswant 5, Rudovick [...]
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- 2016
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26. The need to improve access to rabies post-exposure vaccines: Lessons from Tanzania
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Changalucha, Joel, primary, Steenson, Rachel, additional, Grieve, Eleanor, additional, Cleaveland, Sarah, additional, Lembo, Tiziana, additional, Lushasi, Kennedy, additional, Mchau, Geofrey, additional, Mtema, Zacharia, additional, Sambo, Maganga, additional, Nanai, Alphoncina, additional, Govella, Nicodem J., additional, Dilip, Angel, additional, Sikana, Lwitiko, additional, Ventura, Francesco, additional, and Hampson, Katie, additional
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- 2019
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27. Progress towards rabies elimination from Pemba Island, Southern Tanzania
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Joel Changalucha, Kassim Omar, Msanif Masoud, Tiziana Lembo, Daniel T. Haydon, Rudovick Kazwala, Katie Hampson, Geofrey J. Mchau, Kristyna Rysava, Kennedy Lushasi, Sarah Cleaveland, Mathew Maziku, Sambo Maganga, and Zacharia Mtema
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Veterinary medicine ,dogs ,040301 veterinary sciences ,Population ,Wildlife ,law.invention ,0403 veterinary science ,03 medical and health sciences ,0302 clinical medicine ,elimination ,law ,Environmental health ,medicine ,030212 general & internal medicine ,education ,General Environmental Science ,education.field_of_study ,biology ,Incidence (epidemiology) ,04 agricultural and veterinary sciences ,biology.organism_classification ,medicine.disease ,vaccination ,3. Good health ,Vaccination ,Tanzania ,Transmission (mechanics) ,Geography ,General Earth and Planetary Sciences ,Rabies ,ISDS 2016 Conference Abstracts ,Canine rabies ,Pemba Island ,Contact tracing - Abstract
Objective Using active surveillance approaches to investigate the transmission dynamics of rabies on Pemba Island and across Southern Tanzania, whilst a large-scale dog vaccination program was underway 1 , to gain a greater understanding of the dynamics of infection as the disease is driven towards elimination. Introduction Rabies is endemic in Tanzania and has circulated on Pemba Island since the late 1990s. In 2010, an elimination programme was initiated in Southern Tanzania to demonstrate that human rabies deaths can be eliminated through mass dog vaccinations. We used active surveillance approaches 2 to investigate the dynamics of rabies across the area where this programme was implemented. Methods Government census data and post-vaccination transects were used to estimate the dog population and coverages achieved by vaccination campaigns. Routine surveillance of animal bite injuries using a mobile phone-based surveillance system 3 and active contact tracing were used to identify animal rabies cases and human exposures. Epidemic trees were constructed using spatiotemporal distances between cases and used to estimate the effective reproduction number (R e ). We examined factors affecting rabies incidence and transmission using generalized linear mixed models. Results We estimated a small dog population of 4095 and low dog:human ratio on Pemba (1:105). Overall island-wide vaccination coverage increased from 16.8% in 2011 to 68.2% in 2014. We found a further 48 human exposures (343%), who either were not reported or did not obtain post exposure prophylaxes (PEP). Routine surveillance was found to detect less than 10% (~8.75%). There was a rapid decline in cases detected on Pemba, from 42 before mass dog vaccinations were implemented in 2011, to 2 cases in 2014 (Figures 1). Since May 2014, no rabies cases have been detected. Similarly, R e declined from 1.02 to 0 and a significant relationship was found with rabies cases decreasing with increasing vaccination coverage ( p = 0.013, Figure 2). Across seven other districts on the Tanzanian mainland we also observed major declines in rabies cases with very few cases of rabies in dogs detected in 2016 (Figure 3). Conclusions We conclude that rabies has been eliminated from domestic dog populations on Pemba over the five years since vaccination campaigns have been implemented. Continued surveillance and investigations of any bite incidents are therefore needed to ensure any subsequent incursions are controlled and freedom from rabies is maintained. On the Tanzanian mainland, it has taken longer to control rabies, however trajectories look promising with several districts close to eliminating the disease. However, detection of some wildlife cases in the last 12 months in these districts indicates the need to further investigate remaining foci and the role of wildlife in maintenance.
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- 2017
28. Comparing methods of assessing dog rabies vaccination coverage in rural and urban communities in Tanzania
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Sambo, Maganga, Johnson, Paul C.D., Hotopp, Karen, Changalucha, Joel, Cleaveland, Sarah, Kazwala, Rudovick, Lembo, Tiziana, Lugelo, Ahmed, Lushasi, Kennedy, Maziku, Mathew, Mbunda, Eberhard, Mtema, Zacharia, Sikana, Lwitiko, Townsend, Sunny E., and Hampson, Katie
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Emerging and Re-emerging Infectious Diseases ,accuracy ,rabies control ,dog rabies ,Veterinary Science ,rabies ,dog vaccination ,rabies elimination - Abstract
Rabies can be eliminated by achieving comprehensive coverage of 70% of domestic dogs during annual mass vaccination campaigns. Estimates of vaccination coverage are, therefore, required to evaluate and manage mass dog vaccination programs; however, there is no specific guidance for the most accurate and efficient methods for estimating coverage in different settings. Here, we compare post-vaccination transects, school-based surveys, and household surveys across 28 districts in southeast Tanzania and Pemba island covering rural, urban, coastal and inland settings, and a range of different livelihoods and religious backgrounds. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance was compared with a complete dog population census that also recorded dog vaccination status. Post-vaccination transects involved counting marked (vaccinated) and unmarked (unvaccinated) dogs immediately after campaigns in 2,155 villages (24,721 dogs counted). School-based surveys were administered to 8,587 primary school pupils each representing a unique household, in 119 randomly selected schools approximately 2 months after campaigns. Household surveys were conducted in 160 randomly selected villages (4,488 households) in July/August 2011. Costs to implement these coverage assessments were $12.01, $66.12, and $155.70 per village for post-vaccination transects, school-based, and household surveys, respectively. Simulations were performed to assess the effect of sampling on the precision of coverage estimation. The sampling effort required to obtain reasonably precise estimates of coverage from household surveys is generally very high and probably prohibitively expensive for routine monitoring across large areas, particularly in communities with high human to dog ratios. School-based surveys partially overcame sampling constraints, however, were also costly to obtain reasonably precise estimates of coverage. Post-vaccination transects provided precise and timely estimates of community-level coverage that could be used to troubleshoot the performance of campaigns across large areas. However, transects typically overestimated coverage by around 10%, which therefore needs consideration when evaluating the impacts of campaigns. We discuss the advantages and disadvantages of these different methods and make recommendations for how vaccination campaigns can be better monitored and managed at different stages of rabies control and elimination programs.
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- 2017
29. Estimating the Size of Dog Populations in Tanzania to Inform Rabies Control
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Sambo, Maganga, primary, Hampson, Katie, additional, Changalucha, Joel, additional, Cleaveland, Sarah, additional, Lembo, Tiziana, additional, Lushasi, Kennedy, additional, Mbunda, Eberhard, additional, Mtema, Zacharia, additional, Sikana, Lwitiko, additional, and Johnson, Paul, additional
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- 2018
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30. Toward Elimination of Dog-Mediated Human Rabies: Experiences from Implementing a Large-scale Demonstration Project in Southern Tanzania
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Mpolya, Emmanuel Abraham, primary, Lembo, Tiziana, additional, Lushasi, Kennedy, additional, Mancy, Rebecca, additional, Mbunda, Eberhard M., additional, Makungu, Selemani, additional, Maziku, Matthew, additional, Sikana, Lwitiko, additional, Jaswant, Gurdeep, additional, Townsend, Sunny, additional, Meslin, François-Xavier, additional, Abela-Ridder, Bernadette, additional, Ngeleja, Chanasa, additional, Changalucha, Joel, additional, Mtema, Zacharia, additional, Sambo, Maganga, additional, Mchau, Geofrey, additional, Rysava, Kristyna, additional, Nanai, Alphoncina, additional, Kazwala, Rudovick, additional, Cleaveland, Sarah, additional, and Hampson, Katie, additional
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- 2017
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31. Estimating the Global Burden of Endemic Canine Rabies
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Hampson, Katie, Coudeville, Laurent, Lembo, Tiziana, Sambo, Maganga, Kieffer, Alexia, Attlan, Michaël, Barrat, Jacques, Blanton, Jesse D., Briggs, Deborah J., Cleaveland, Sarah, Costa, Peter, Freuling, Conrad M., Hiby, Elly, Knopf, Lea, Leanes, Fernando, Meslin, Francois-Xavier, Metlin, Artem, Miranda, Mary Elizabeth, Müller, Thomas, Nel, Louis H., Recuenco, Sergio, Rupprech, Charles E., Schumacher, Carolin, Taylor, Louise, Vigilato, Marco Antonio Natal, Zinsstag, Jakob, and Dushoff, Jonathan
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Dogs ,Endemic Diseases ,Rabies Vaccines ,Rabies ,Vaccination ,Animals ,Humans ,Correction ,Dog Diseases ,Public Health ,Global Health ,Post-Exposure Prophylaxis ,Research Article - Abstract
Background Rabies is a notoriously underreported and neglected disease of low-income countries. This study aims to estimate the public health and economic burden of rabies circulating in domestic dog populations, globally and on a country-by-country basis, allowing an objective assessment of how much this preventable disease costs endemic countries. Methodology/Principal Findings We established relationships between rabies mortality and rabies prevention and control measures, which we incorporated into a model framework. We used data derived from extensive literature searches and questionnaires on disease incidence, control interventions and preventative measures within this framework to estimate the disease burden. The burden of rabies impacts on public health sector budgets, local communities and livestock economies, with the highest risk of rabies in the poorest regions of the world. This study estimates that globally canine rabies causes approximately 59,000 (95% Confidence Intervals: 25-159,000) human deaths, over 3.7 million (95% CIs: 1.6-10.4 million) disability-adjusted life years (DALYs) and 8.6 billion USD (95% CIs: 2.9-21.5 billion) economic losses annually. The largest component of the economic burden is due to premature death (55%), followed by direct costs of post-exposure prophylaxis (PEP, 20%) and lost income whilst seeking PEP (15.5%), with only limited costs to the veterinary sector due to dog vaccination (1.5%), and additional costs to communities from livestock losses (6%). Conclusions/Significance This study demonstrates that investment in dog vaccination, the single most effective way of reducing the disease burden, has been inadequate and that the availability and affordability of PEP needs improving. Collaborative investments by medical and veterinary sectors could dramatically reduce the current large, and unnecessary, burden of rabies on affected communities. Improved surveillance is needed to reduce uncertainty in burden estimates and to monitor the impacts of control efforts., Author Summary Rabies is a fatal viral disease largely transmitted to humans from bites by infected animals—predominantly from domestic dogs. The disease is entirely preventable through prompt administration of post-exposure prophylaxis (PEP) to bite victims and can be controlled through mass vaccination of domestic dogs. Yet, rabies is still very prevalent in developing countries, affecting populations with limited access to health care. The disease is also grossly underreported in these areas because most victims die at home. This leads to insufficient prioritization of rabies prevention in public health agendas. To address this lack of information on the impacts of rabies, in this study, we compiled available data to provide a robust estimate of the health and economic implications of dog rabies globally. The most important impacts included: loss of human lives (approximately 59,000 annually) and productivity due to premature death from rabies, and costs of obtaining PEP once an exposure has occurred. The greatest risk of developing rabies fell upon the poorest regions of the world, where domestic dog vaccination is not widely implemented and access to PEP is most limited. A greater focus on mass dog vaccination could eliminate the disease at source, reducing the need for costly PEP and preventing the large and unnecessary burden of mortality on at-risk communities.
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- 2015
32. Surveillance to Establish Elimination of Transmission and Freedom from Dog-mediated Rabies
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Hampson, Katie, primary, Abela-Ridder, Bernadette, additional, Brunker, Kirstyn, additional, Bucheli, S. Tamara M., additional, Carvalho, Mary, additional, Caldas, Eduardo, additional, Changalucha, Joel, additional, Cleaveland, Sarah, additional, Dushoff, Jonathan, additional, Gutierrez, Veronica, additional, Fooks, Anthony R, additional, Hotopp, Karen, additional, Haydon, Daniel T, additional, Lugelo, Ahmed, additional, Lushasi, Kennedy, additional, Mancy, Rebecca, additional, Marston, Denise A, additional, Mtema, Zac, additional, Rajeev, Malavika, additional, Dourado, Lúcia R. Montebello P, additional, Gonzalez Roldan, J. F., additional, Rysava, Kristyna, additional, Rocha, Silene Manrique, additional, Sambo, Maganga, additional, Sikana, Lwitiko, additional, Vigilato, Marco, additional, and Del Rio Vilas, Victor, additional
- Published
- 2016
- Full Text
- View/download PDF
33. Knowledge, Attitudes and Practices (KAP) about rabies prevention and control: a community survey in Tanzania
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Sambo, Maganga, Lembo, Tiziana, Cleaveland, Sarah, Ferguson, Heather, Sikana, Lwitiko, Simon, Cleophas, Urassa, Honorati, and Hampson, Katie
- Subjects
Disease Ecology ,Adult ,Male ,Health Knowledge, Attitudes, Practice ,lcsh:Arctic medicine. Tropical medicine ,Adolescent ,lcsh:RC955-962 ,Rabies ,Epidemiology ,Global Health ,Pediatrics ,Tanzania ,Young Adult ,Dogs ,Zoonoses ,Medicine and Health Sciences ,Animals ,Humans ,Public and Occupational Health ,Dog Diseases ,Developing Countries ,lcsh:Public aspects of medicine ,Child Health ,Biology and Life Sciences ,lcsh:RA1-1270 ,Tropical Diseases ,Health Care ,Infectious Diseases ,Cross-Sectional Studies ,Veterinary Diseases ,Community Health ,Veterinary Science ,Female ,Behavioral and Social Aspects of Health ,Research Article ,Neglected Tropical Diseases - Abstract
Background Despite being entirely preventable, canine rabies still kills 55,000 people/year in developing countries. Information about local beliefs and practices can identify knowledge gaps that may affect prevention practices and lead to unnecessary deaths. Methodology/Principal Findings We investigated knowledge, attitudes and practices related to rabies and its prevention and control amongst a cross-section of households (n = 5,141) in urban and rural areas of central, southern and northern Tanzania. Over 17% of respondents owned domestic dogs (average of 2.3 dogs/household),>95% had heard about rabies, and>80% knew that rabies is transmitted through dog bites. People who (1) had greater education, (2) originated from areas with a history of rabies interventions, (3) had experienced exposure by a suspect rabid animal, (4) were male and (5) owned dogs were more likely to have greater knowledge about the disease. Around 80% of respondents would seek hospital treatment after a suspect bite, but only 5% were aware of the need for prompt wound cleansing after a bite. Although>65% of respondents knew of dog vaccination as a means to control rabies, only 51% vaccinated their dogs. Determinants of dog vaccination included (1) being a male-headed household, (2) presence of children, (3) low economic status, (4) residing in urban areas, (5) owning livestock, (6) originating from areas with rabies interventions and (7) having purchased a dog. The majority of dog-owning respondents were willing to contribute no more than US$0.31 towards veterinary services. Conclusions/Significance We identified important knowledge gaps related to, and factors influencing the prevention and control of rabies in Tanzania. Increasing knowledge regarding wound washing, seeking post-exposure prophylaxis and the need to vaccinate dogs are likely to result in more effective prevention of rabies; however, greater engagement of the veterinary and medical sectors is also needed to ensure the availability of preventative services., Author Summary Rabies remains a major public health problem in Africa and Asia, although means to control and prevent the disease are available through mass dog vaccination and provision of post-exposure prophylaxis to people exposed to bites by suspect rabid animals. Here we report the results of an extensive community survey on knowledge, attitudes and practices related to rabies control and prevention, covering rural and urban settings in central, northern and southern Tanzania. Our results showed that the majority of people across Tanzania had heard about rabies and knew that it is transmitted by dog bites, but most lacked comprehensive knowledge about key practices, such as the need for wound cleansing, which could prevent unnecessary deaths from the disease. In other circumstances, knowledge (for example, about the need to vaccinate dogs to control rabies) did not reflect good practice. In order to address the knowledge gaps identified by this study, there is a need for interventions aimed at increasing awareness, focusing on simple messages and targeting the community as a whole. This information could be channelled through media, community meetings and professionals including community leaders, health workers, teachers, livestock officers and clinicians.
- Published
- 2014
34. Epidemiological dynamics of rabies in Tanzania and its impacts on local communities
- Author
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Sambo, Maganga Burton
- Subjects
RA Public aspects of medicine ,R Medicine (General) - Abstract
Rabies is a fatal viral zoonotic infection caused by a Lyssavirus. Rabies exerts a major public health and economic burden; it is responsible for at least 55,000 deaths worldwide, predominantly in Africa and Asia. More than 90% of rabies deaths are caused by domestic dogs. Global expenditure on rabies prevention and control exceeds US$500 million per annum. Although human rabies is 100% preventable, through vaccination of animal reservoirs and post-exposure prophylaxis (PEP) of people exposed to bites, no effective large-scale control of rabies has been achieved in sub-Saharan Africa. Effective implementation of sustainable rabies control and prevention programs, involves full participation of individuals, veterinary and medical services. Veterinary services must control rabies transmission through mass dog vaccination campaigns because human deaths are caused by epidemics in domestic dogs, medical services must provide PEP to prevent disease in exposed individuals and exposed individuals must seek PEP and dog owners must take their dogs to be vaccinated. This thesis focuses on factors affecting individuals and medical services. This thesis examines challenges in the control and prevention of rabies in sub-Saharan Africa. Firstly, to address these challenges, we developed an analytical framework to portray the influence of individual and institutional factors within both the veterinary and medical services, in controlling and preventing rabies. The research carried out in chapters two and three investigate different aspects of this framework. Specifically in Chapter 2, we conducted a knowledge, attitude and practice (KAP) survey in seven districts covering southern, central and northern Tanzania. We used the collected data to investigate factors that influence knowledge of rabies and how knowledge of rabies influences attitudes and practice in control and prevention of rabies. Our findings show that knowledge about rabies in Tanzania is limited. However, we found an indication that those who were more knowledgeable of rabies claimed to practise better rabies control and prevention. In Chapter 3, we collected information using contact tracing and questionnaires to evaluate the burden of rabies and its impacts on local communities. The study demonstrated that rabies is a substantial economic concern to bite victims. A bite victim in Tanzania would be required to spend over US$70 to complete WHO recommended PEP schedules. The costs of PEP disproportionately affect bite victims from rural areas where PEP doses are often not available. Families reported spending family allowances, borrowing money and or selling crops or livestock to pay for PEP. Fewer than 10% of families paid for PEP from their salary compared to 15% of patients from urban areas. Otherwise, patients depended on external financial sources such as contributions from relatives or friends or decided not to seek PEP because of the high costs involved. High PEP costs also affected compliance with PEP schedules. The probability of obtaining the first dose of PEP was about 70%, declined slightly for the second and third doses but declined dramatically for the fourth and fifth doses. We also found that 15% of bite victims who did not receive any PEP went on to develop rabies. The costs of PEP were 2 times higher than costs previously reported from Africa. In Chapter 4 we discuss our overall results and conclude that interventions to control and prevent rabies require multi-sector commitment of all key stakeholders.
- Published
- 2012
35. Elucidating the phylodynamics of endemic rabies virus in eastern Africa using whole-genome sequencing
- Author
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Brunker, Kirstyn, primary, Marston, Denise A, additional, Horton, Daniel L, additional, Cleaveland, Sarah, additional, Fooks, Anthony R, additional, Kazwala, Rudovick, additional, Ngeleja, Chanasa, additional, Lembo, Tiziana, additional, Sambo, Maganga, additional, Mtema, Zacharia J, additional, Sikana, Lwitiko, additional, Wilkie, Gavin, additional, Biek, Roman, additional, and Hampson, Katie, additional
- Published
- 2015
- Full Text
- View/download PDF
36. Eliminating Rabies in Tanzania? Local Understandings and Responses to Mass Dog Vaccination in Kilombero and Ulanga Districts
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Bardosh, Kevin, primary, Sambo, Maganga, additional, Sikana, Lwitiko, additional, Hampson, Katie, additional, and Welburn, Susan C., additional
- Published
- 2014
- Full Text
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37. The changing landscape of rabies epidemiology and control
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Cleaveland, Sarah, primary, Beyer, Hawthorne, additional, Hampson, Katie, additional, Haydon, Daniel, additional, Lankester, Felix, additional, Lembo, Tiziana, additional, Meslin, Francois-Xavier, additional, Morters, Michelle, additional, Mtema, Zacharia, additional, Sambo, Maganga, additional, and Townsend, Sunny, additional
- Published
- 2014
- Full Text
- View/download PDF
38. The Burden of Rabies in Tanzania and Its Impact on Local Communities
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Sambo, Maganga, primary, Cleaveland, Sarah, additional, Ferguson, Heather, additional, Lembo, Tiziana, additional, Simon, Cleophas, additional, Urassa, Honorati, additional, and Hampson, Katie, additional
- Published
- 2013
- Full Text
- View/download PDF
39. Measuring, monitoring and improving mass dog vaccination programmes to control and eliminate rabies
- Author
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Sambo, Maganga and Sambo, Maganga
- Abstract
Rabies is an acute viral infection which causes horrifying neurological symptoms that inevitably result in death. Every year at least 59,000 people are estimated to die from rabies and more than 10 million are treated with post-exposure prophylaxis (PEP). Over 90% of human rabies deaths occur in Asia and Africa following bites from domestic dogs. Although human rabies deaths are 100% preventable through the delivery of prompt PEP to bite victims following a bite, PEP is not accessible to many poor rural victims, most of whom subsist on less than US$1.25/day. Empirical and theoretical evidence shows that mass dog vaccination that reaches 70% of susceptible dog population can interrupt the transmission cycle. Rabies has been eliminated from industrialized countries through mass dog vaccination, and the continent-wide elimination of canine rabies from the Americas is now within reach. In contrast, no effective large-scale control of dog rabies has been achieved in Africa and information is still needed to optimise and sustain dog vaccination programmes. The aim of this thesis was to evaluate the rabies control programme in Tanzania. This thesis is presented as a series of three standalone chapters (Chapters 2-4) that are introduced and then summarised by a general introduction (Chapter 1) and a general discussion (Chapter 5) respectively. Achieving high coverage is the most important aim of any vaccination programme; however, assessing the vaccination coverage achieved is often neglected in rabies endemic countries. In Chapter 2, I compare three methods of measuring vaccination coverage (post-vaccination transects, school-based surveys, and household surveys) across 28 districts in different settings in southeast Tanzania and Pemba island in order to determine which is most precise method. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance in producing precise estimates of coverage was compared with
40. Measuring, monitoring and improving mass dog vaccination programmes to control and eliminate rabies
- Author
-
Sambo, Maganga and Sambo, Maganga
- Abstract
Rabies is an acute viral infection which causes horrifying neurological symptoms that inevitably result in death. Every year at least 59,000 people are estimated to die from rabies and more than 10 million are treated with post-exposure prophylaxis (PEP). Over 90% of human rabies deaths occur in Asia and Africa following bites from domestic dogs. Although human rabies deaths are 100% preventable through the delivery of prompt PEP to bite victims following a bite, PEP is not accessible to many poor rural victims, most of whom subsist on less than US$1.25/day. Empirical and theoretical evidence shows that mass dog vaccination that reaches 70% of susceptible dog population can interrupt the transmission cycle. Rabies has been eliminated from industrialized countries through mass dog vaccination, and the continent-wide elimination of canine rabies from the Americas is now within reach. In contrast, no effective large-scale control of dog rabies has been achieved in Africa and information is still needed to optimise and sustain dog vaccination programmes. The aim of this thesis was to evaluate the rabies control programme in Tanzania. This thesis is presented as a series of three standalone chapters (Chapters 2-4) that are introduced and then summarised by a general introduction (Chapter 1) and a general discussion (Chapter 5) respectively. Achieving high coverage is the most important aim of any vaccination programme; however, assessing the vaccination coverage achieved is often neglected in rabies endemic countries. In Chapter 2, I compare three methods of measuring vaccination coverage (post-vaccination transects, school-based surveys, and household surveys) across 28 districts in different settings in southeast Tanzania and Pemba island in order to determine which is most precise method. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance in producing precise estimates of coverage was compared with
41. Measuring, monitoring and improving mass dog vaccination programmes to control and eliminate rabies
- Author
-
Sambo, Maganga and Sambo, Maganga
- Abstract
Rabies is an acute viral infection which causes horrifying neurological symptoms that inevitably result in death. Every year at least 59,000 people are estimated to die from rabies and more than 10 million are treated with post-exposure prophylaxis (PEP). Over 90% of human rabies deaths occur in Asia and Africa following bites from domestic dogs. Although human rabies deaths are 100% preventable through the delivery of prompt PEP to bite victims following a bite, PEP is not accessible to many poor rural victims, most of whom subsist on less than US$1.25/day. Empirical and theoretical evidence shows that mass dog vaccination that reaches 70% of susceptible dog population can interrupt the transmission cycle. Rabies has been eliminated from industrialized countries through mass dog vaccination, and the continent-wide elimination of canine rabies from the Americas is now within reach. In contrast, no effective large-scale control of dog rabies has been achieved in Africa and information is still needed to optimise and sustain dog vaccination programmes. The aim of this thesis was to evaluate the rabies control programme in Tanzania. This thesis is presented as a series of three standalone chapters (Chapters 2-4) that are introduced and then summarised by a general introduction (Chapter 1) and a general discussion (Chapter 5) respectively. Achieving high coverage is the most important aim of any vaccination programme; however, assessing the vaccination coverage achieved is often neglected in rabies endemic countries. In Chapter 2, I compare three methods of measuring vaccination coverage (post-vaccination transects, school-based surveys, and household surveys) across 28 districts in different settings in southeast Tanzania and Pemba island in order to determine which is most precise method. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance in producing precise estimates of coverage was compared with
42. Epidemiological dynamics of rabies in Tanzania and its impacts on local communities.
- Author
-
Sambo, Maganga Burton and Sambo, Maganga Burton
- Abstract
Rabies is a fatal viral zoonotic infection caused by a Lyssavirus. Rabies exerts a major public health and economic burden; it is responsible for at least 55,000 deaths worldwide, predominantly in Africa and Asia. More than 90% of rabies deaths are caused by domestic dogs. Global expenditure on rabies prevention and control exceeds US$500 million per annum. Although human rabies is 100% preventable, through vaccination of animal reservoirs and post-exposure prophylaxis (PEP) of people exposed to bites, no effective large-scale control of rabies has been achieved in sub-Saharan Africa. Effective implementation of sustainable rabies control and prevention programs, involves full participation of individuals, veterinary and medical services. Veterinary services must control rabies transmission through mass dog vaccination campaigns because human deaths are caused by epidemics in domestic dogs, medical services must provide PEP to prevent disease in exposed individuals and exposed individuals must seek PEP and dog owners must take their dogs to be vaccinated. This thesis focuses on factors affecting individuals and medical services. This thesis examines challenges in the control and prevention of rabies in sub-Saharan Africa. Firstly, to address these challenges, we developed an analytical framework to portray the influence of individual and institutional factors within both the veterinary and medical services, in controlling and preventing rabies. The research carried out in chapters two and three investigate different aspects of this framework. Specifically in Chapter 2, we conducted a knowledge, attitude and practice (KAP) survey in seven districts covering southern, central and northern Tanzania. We used the collected data to investigate factors that influence knowledge of rabies and how knowledge of rabies influences attitudes and practice in control and prevention of rabies. Our findings show that knowledge about rabies in Tanzania is limited. However, we found an
43. Epidemiological dynamics of rabies in Tanzania and its impacts on local communities.
- Author
-
Sambo, Maganga Burton and Sambo, Maganga Burton
- Abstract
Rabies is a fatal viral zoonotic infection caused by a Lyssavirus. Rabies exerts a major public health and economic burden; it is responsible for at least 55,000 deaths worldwide, predominantly in Africa and Asia. More than 90% of rabies deaths are caused by domestic dogs. Global expenditure on rabies prevention and control exceeds US$500 million per annum. Although human rabies is 100% preventable, through vaccination of animal reservoirs and post-exposure prophylaxis (PEP) of people exposed to bites, no effective large-scale control of rabies has been achieved in sub-Saharan Africa. Effective implementation of sustainable rabies control and prevention programs, involves full participation of individuals, veterinary and medical services. Veterinary services must control rabies transmission through mass dog vaccination campaigns because human deaths are caused by epidemics in domestic dogs, medical services must provide PEP to prevent disease in exposed individuals and exposed individuals must seek PEP and dog owners must take their dogs to be vaccinated. This thesis focuses on factors affecting individuals and medical services. This thesis examines challenges in the control and prevention of rabies in sub-Saharan Africa. Firstly, to address these challenges, we developed an analytical framework to portray the influence of individual and institutional factors within both the veterinary and medical services, in controlling and preventing rabies. The research carried out in chapters two and three investigate different aspects of this framework. Specifically in Chapter 2, we conducted a knowledge, attitude and practice (KAP) survey in seven districts covering southern, central and northern Tanzania. We used the collected data to investigate factors that influence knowledge of rabies and how knowledge of rabies influences attitudes and practice in control and prevention of rabies. Our findings show that knowledge about rabies in Tanzania is limited. However, we found an
44. Measuring, monitoring and improving mass dog vaccination programmes to control and eliminate rabies
- Author
-
Sambo, Maganga and Sambo, Maganga
- Abstract
Rabies is an acute viral infection which causes horrifying neurological symptoms that inevitably result in death. Every year at least 59,000 people are estimated to die from rabies and more than 10 million are treated with post-exposure prophylaxis (PEP). Over 90% of human rabies deaths occur in Asia and Africa following bites from domestic dogs. Although human rabies deaths are 100% preventable through the delivery of prompt PEP to bite victims following a bite, PEP is not accessible to many poor rural victims, most of whom subsist on less than US$1.25/day. Empirical and theoretical evidence shows that mass dog vaccination that reaches 70% of susceptible dog population can interrupt the transmission cycle. Rabies has been eliminated from industrialized countries through mass dog vaccination, and the continent-wide elimination of canine rabies from the Americas is now within reach. In contrast, no effective large-scale control of dog rabies has been achieved in Africa and information is still needed to optimise and sustain dog vaccination programmes. The aim of this thesis was to evaluate the rabies control programme in Tanzania. This thesis is presented as a series of three standalone chapters (Chapters 2-4) that are introduced and then summarised by a general introduction (Chapter 1) and a general discussion (Chapter 5) respectively. Achieving high coverage is the most important aim of any vaccination programme; however, assessing the vaccination coverage achieved is often neglected in rabies endemic countries. In Chapter 2, I compare three methods of measuring vaccination coverage (post-vaccination transects, school-based surveys, and household surveys) across 28 districts in different settings in southeast Tanzania and Pemba island in order to determine which is most precise method. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance in producing precise estimates of coverage was compared with
45. Measuring, monitoring and improving mass dog vaccination programmes to control and eliminate rabies
- Author
-
Sambo, Maganga and Sambo, Maganga
- Abstract
Rabies is an acute viral infection which causes horrifying neurological symptoms that inevitably result in death. Every year at least 59,000 people are estimated to die from rabies and more than 10 million are treated with post-exposure prophylaxis (PEP). Over 90% of human rabies deaths occur in Asia and Africa following bites from domestic dogs. Although human rabies deaths are 100% preventable through the delivery of prompt PEP to bite victims following a bite, PEP is not accessible to many poor rural victims, most of whom subsist on less than US$1.25/day. Empirical and theoretical evidence shows that mass dog vaccination that reaches 70% of susceptible dog population can interrupt the transmission cycle. Rabies has been eliminated from industrialized countries through mass dog vaccination, and the continent-wide elimination of canine rabies from the Americas is now within reach. In contrast, no effective large-scale control of dog rabies has been achieved in Africa and information is still needed to optimise and sustain dog vaccination programmes. The aim of this thesis was to evaluate the rabies control programme in Tanzania. This thesis is presented as a series of three standalone chapters (Chapters 2-4) that are introduced and then summarised by a general introduction (Chapter 1) and a general discussion (Chapter 5) respectively. Achieving high coverage is the most important aim of any vaccination programme; however, assessing the vaccination coverage achieved is often neglected in rabies endemic countries. In Chapter 2, I compare three methods of measuring vaccination coverage (post-vaccination transects, school-based surveys, and household surveys) across 28 districts in different settings in southeast Tanzania and Pemba island in order to determine which is most precise method. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance in producing precise estimates of coverage was compared with
46. Epidemiological dynamics of rabies in Tanzania and its impacts on local communities.
- Author
-
Sambo, Maganga Burton and Sambo, Maganga Burton
- Abstract
Rabies is a fatal viral zoonotic infection caused by a Lyssavirus. Rabies exerts a major public health and economic burden; it is responsible for at least 55,000 deaths worldwide, predominantly in Africa and Asia. More than 90% of rabies deaths are caused by domestic dogs. Global expenditure on rabies prevention and control exceeds US$500 million per annum. Although human rabies is 100% preventable, through vaccination of animal reservoirs and post-exposure prophylaxis (PEP) of people exposed to bites, no effective large-scale control of rabies has been achieved in sub-Saharan Africa. Effective implementation of sustainable rabies control and prevention programs, involves full participation of individuals, veterinary and medical services. Veterinary services must control rabies transmission through mass dog vaccination campaigns because human deaths are caused by epidemics in domestic dogs, medical services must provide PEP to prevent disease in exposed individuals and exposed individuals must seek PEP and dog owners must take their dogs to be vaccinated. This thesis focuses on factors affecting individuals and medical services. This thesis examines challenges in the control and prevention of rabies in sub-Saharan Africa. Firstly, to address these challenges, we developed an analytical framework to portray the influence of individual and institutional factors within both the veterinary and medical services, in controlling and preventing rabies. The research carried out in chapters two and three investigate different aspects of this framework. Specifically in Chapter 2, we conducted a knowledge, attitude and practice (KAP) survey in seven districts covering southern, central and northern Tanzania. We used the collected data to investigate factors that influence knowledge of rabies and how knowledge of rabies influences attitudes and practice in control and prevention of rabies. Our findings show that knowledge about rabies in Tanzania is limited. However, we found an
47. Epidemiological dynamics of rabies in Tanzania and its impacts on local communities.
- Author
-
Sambo, Maganga Burton and Sambo, Maganga Burton
- Abstract
Rabies is a fatal viral zoonotic infection caused by a Lyssavirus. Rabies exerts a major public health and economic burden; it is responsible for at least 55,000 deaths worldwide, predominantly in Africa and Asia. More than 90% of rabies deaths are caused by domestic dogs. Global expenditure on rabies prevention and control exceeds US$500 million per annum. Although human rabies is 100% preventable, through vaccination of animal reservoirs and post-exposure prophylaxis (PEP) of people exposed to bites, no effective large-scale control of rabies has been achieved in sub-Saharan Africa. Effective implementation of sustainable rabies control and prevention programs, involves full participation of individuals, veterinary and medical services. Veterinary services must control rabies transmission through mass dog vaccination campaigns because human deaths are caused by epidemics in domestic dogs, medical services must provide PEP to prevent disease in exposed individuals and exposed individuals must seek PEP and dog owners must take their dogs to be vaccinated. This thesis focuses on factors affecting individuals and medical services. This thesis examines challenges in the control and prevention of rabies in sub-Saharan Africa. Firstly, to address these challenges, we developed an analytical framework to portray the influence of individual and institutional factors within both the veterinary and medical services, in controlling and preventing rabies. The research carried out in chapters two and three investigate different aspects of this framework. Specifically in Chapter 2, we conducted a knowledge, attitude and practice (KAP) survey in seven districts covering southern, central and northern Tanzania. We used the collected data to investigate factors that influence knowledge of rabies and how knowledge of rabies influences attitudes and practice in control and prevention of rabies. Our findings show that knowledge about rabies in Tanzania is limited. However, we found an
48. Correction: Estimating the Global Burden of Endemic Canine Rabies.
- Author
-
Hampson, Katie, Coudeville, Laurent, Lembo, Tiziana, Sambo, Maganga, Kieffer, Alexia, Attlan, Michaël, Barrat, Jacques, Blanton, Jesse D., Briggs, Deborah J., Cleaveland, Sarah, Costa, Peter, Freuling, Conrad M., Hiby, Elly, Knopf, Lea, Leanes, Fernando, Meslin, François-Xavier, Metlin, Artem, Miranda, Mary Elizabeth, Müller, Thomas, and Nel, Louis H.
- Subjects
RABIES ,LIVESTOCK losses ,U.S. dollar ,VACCINATION ,DOGS - Abstract
This document is a correction notice for an article titled "Estimating the Global Burden of Endemic Canine Rabies." The correction addresses errors in Table 3, specifically the headings for columns six, seven, and eight. The correct order should be Dog vaccination, Dog population management, and Livestock losses. The table provides a breakdown of the economic costs of rabies by cluster in millions of USD, with estimates for different countries and regions. The document also includes a graph and additional information about the clusters and countries included in each cluster. The purpose of this table is unclear without further context or explanation. [Extracted from the article]
- Published
- 2015
- Full Text
- View/download PDF
49. A randomized controlled trial of the effectiveness of a community-based rabies vaccination strategy.
- Author
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Lankester F, Lugelo A, Changalucha J, Anderson D, Duamor CT, Czupryna A, Lushasi K, Ferguson E, Swai ES, Nonga H, Sambo M, Cleaveland S, Wyke S, Johnson PCD, and Hampson K
- Abstract
Background: Approximately 60,000 people die from dog-mediated rabies annually. Low and heterogeneous coverage reduces the effectiveness of dog vaccination campaigns that can eliminate rabies. Campaigns typically involve teams travelling annually to villages to deliver cold chain stored vaccines from centralized headquarters. Thermotolerant vaccines enable novel decentralized delivery of locally-stored vaccines by communities throughout the year. We compared the effectiveness of annual team-based versus continuous community-based dog vaccination strategies., Methods: We conducted a cluster randomized controlled trial across Mara region, Tanzania. Trial clusters were administrative wards (112, on average four villages each). For the team-based arm vaccinators hosted annual static-point clinics, whilst for the community-based arm, a ward-based animal health officer with a village community leader managed vaccinations using vaccines stored within the ward. We measured vaccination coverage, the primary outcome, twice annually per cluster (month 1 and 11) through household surveys over three years (November 2020 to October 2023) and examined spatial and temporal coverage variations as secondary outcomes., Findings: Community-based delivery achieved significantly higher coverage (49-62%) than team-based delivery (22-46%), and consistently exceeded the critical threshold for herd immunity (40%), Odds ratio (OR): 1.48-3.49. The lower less uniform coverage achieved through team-based delivery had a higher monthly probability of falling below the critical threshold (0.6, 95% CI: 0.38-0.81) vs 0.18 (95% CI: 0.04-0.40). Greater declines in coverage over the year were recorded in the team-based arm compared to the community-based., Conclusion: Community-based mass dog vaccination achieves higher more consistent coverage than team-based delivery across settings typical of many sub-Saharan African countries. This approach could play an important role in national rabies elimination programmes aiming to end human rabies deaths by 2030 as part of the global 'zero by 30' strategy.
- Published
- 2024
- Full Text
- View/download PDF
50. Comparing Methods of Assessing Dog Rabies Vaccination Coverage in Rural and Urban Communities in Tanzania.
- Author
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Sambo M, Johnson PC, Hotopp K, Changalucha J, Cleaveland S, Kazwala R, Lembo T, Lugelo A, Lushasi K, Maziku M, Mbunda E, Mtema Z, Sikana L, Townsend SE, and Hampson K
- Abstract
Rabies can be eliminated by achieving comprehensive coverage of 70% of domestic dogs during annual mass vaccination campaigns. Estimates of vaccination coverage are, therefore, required to evaluate and manage mass dog vaccination programs; however, there is no specific guidance for the most accurate and efficient methods for estimating coverage in different settings. Here, we compare post-vaccination transects, school-based surveys, and household surveys across 28 districts in southeast Tanzania and Pemba island covering rural, urban, coastal and inland settings, and a range of different livelihoods and religious backgrounds. These approaches were explored in detail in a single district in northwest Tanzania (Serengeti), where their performance was compared with a complete dog population census that also recorded dog vaccination status. Post-vaccination transects involved counting marked (vaccinated) and unmarked (unvaccinated) dogs immediately after campaigns in 2,155 villages (24,721 dogs counted). School-based surveys were administered to 8,587 primary school pupils each representing a unique household, in 119 randomly selected schools approximately 2 months after campaigns. Household surveys were conducted in 160 randomly selected villages (4,488 households) in July/August 2011. Costs to implement these coverage assessments were $12.01, $66.12, and $155.70 per village for post-vaccination transects, school-based, and household surveys, respectively. Simulations were performed to assess the effect of sampling on the precision of coverage estimation. The sampling effort required to obtain reasonably precise estimates of coverage from household surveys is generally very high and probably prohibitively expensive for routine monitoring across large areas, particularly in communities with high human to dog ratios. School-based surveys partially overcame sampling constraints, however, were also costly to obtain reasonably precise estimates of coverage. Post-vaccination transects provided precise and timely estimates of community-level coverage that could be used to troubleshoot the performance of campaigns across large areas. However, transects typically overestimated coverage by around 10%, which therefore needs consideration when evaluating the impacts of campaigns. We discuss the advantages and disadvantages of these different methods and make recommendations for how vaccination campaigns can be better monitored and managed at different stages of rabies control and elimination programs.
- Published
- 2017
- Full Text
- View/download PDF
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