107 results on '"Njau B"'
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2. The effects of non-specifically activated immunity in rabbits on primary infestation with Rhipicephalus evertsi evertsi
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Njau, B. C.
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- 1990
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3. The interaction between the immune response of rabbits to heterologous antigens and a primary infestation with Rhipicephalus evertsi evertsi
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Njau, B. C., Nyindo, M., and Mutani, A.
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- 1990
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4. PIN127 - HETEROGENEOUS PREFERENCES FOR HIV/AIDS COUNSELING AND TESTING AMONG TWO HIGH RISK POPULATIONS IN NORTHERN TANZANIA - RESULTS FROM A DISCRETE CHOICE EXPERIMENT
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Ostermann, J., primary, Njau, B., additional, Hobbie, A., additional, Mtuy, T., additional, and Thielman, N., additional
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- 2018
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5. Controlling Livestock Diseases in the Tropics by Breeding: A Perspective
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Kasali, O. B., Njau, B. C., Bekele, T., Thomson, E. F., editor, and Thomson, F. S., editor
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- 1988
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6. Preliminary Studies on Chemotherapy of Bovine Theileriosis With Halofuginone in Tanzania
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Njau, B. C., Mkonyi, P. M., Irvin, A. D., editor, Cunningham, M. P., editor, and Young, A. S., editor
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- 1981
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7. Resistance to Rhipicephalus evertsi evertsi in immunosuppressed rabbits
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Njau, B. C.
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- 1989
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8. Acquired resistance in rabbits to immature stages of Rhipicephalus evertsi evertsi
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Njau, B. C., Nyindo, M., and Mutani, A.
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- 1988
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9. Abomasal impaction associated with anorexia and mortality in lambs
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Njau, B. C., Kasali, O. B., and Scholtens, R. G.
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- 1988
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10. The influence of watering practices on the transmission of Fasciola among sheep in the Ethiopian highlands
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Njau, B. C., Kasali, O. B., Scholtens, R. G., and Akalework, N.
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- 1989
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11. Treatment of field cases of East Coast fever with halofuginone lactate
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Njau, B. C., Mkonyi, P. A., Mleche, W. C. H., Kitaly, J. I., and Maiseli, N. C.
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- 1985
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12. Factors associated with management of cervical cancer patients at KCMC Hospital, Tanzania: A retrospective cross-sectional study
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Mosha, D D., Mahande, M M., Ahaz, J J., Mosha, M M., Njau, B B., Kitali, B B., Obure, J J., Mosha, D D., Mahande, M M., Ahaz, J J., Mosha, M M., Njau, B B., Kitali, B B., and Obure, J J.
- Abstract
Cervical cancer is an important public health problem among adult women worldwide. It is the second commonest malignancy in female worldwide and the leading malignancy among women in Tanzania. In most developing countries, cancer of the cervix tends to be diagnosed in its later stages when is less treatable. This study aimed at assessing factors associated with management of cervical cancer at KCMC Hospital in northern Tanzania. A purpose sampling was used to select a total of 200 patient records out of 374 with complete information. Median age of cervical cancer patients was 51 years (range 21-84 years) and 81.5% were either married or co-habiting. Stage of the cervical cancer (X 2 = 28.63, p < 0.001) and age (÷2 = 12.62, P < 0.05) were significant predictors for patient′s management plan, with 56% of cases seen at late cancer stage. Forty-seven percent of the cervical cancer patients were referred to Ocean Road Cancer Institute for radiotherapy and or chemotherapy. Patients discharged home for palliative care were 30% and 17% patients died at the hospital. Known HIV positive patients were significantly associated with death and terminal care seen at late stage than patients with unknown HIV sero-status (X 2 = 20.16, P < 0.001). In conclusion, most of cervical cancer patients at KCMC are seen at late stage necessitating referral for radiotherapy, chemotherapy or palliative care. This may reflect lack of cervical screening in order to early detect and treat pre-malignant disease stage.
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- 2009
13. Motivating Factors and Psychosocial Barriers to Condom Use among out-of-School Youths in Dar es Salaam, Tanzania: A Cross Sectional Survey Using the Health Belief Model
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Katikiro, E., primary and Njau, B., additional
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- 2012
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14. Bacteremic Disseminated Tuberculosis in Sub-Saharan Africa: A Prospective Cohort Study
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Crump, J. A., primary, Ramadhani, H. O., additional, Morrissey, A. B., additional, Saganda, W., additional, Mwako, M. S., additional, Yang, L.-Y., additional, Chow, S.-C., additional, Njau, B. N., additional, Mushi, G. S., additional, Maro, V. P., additional, Reller, L. B., additional, and Bartlett, J. A., additional
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- 2012
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15. Perceived acceptability of home-based couples voluntary HIV counseling and testing in Northern Tanzania
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Njau, B., primary, Watt, M.H., additional, Ostermann, J., additional, Manongi, R., additional, and Sikkema, K.J., additional
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- 2011
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16. Invasive Bacterial and Fungal Infections Among Hospitalized HIV-Infected and HIV-Uninfected Adults and Adolescents in Northern Tanzania
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Crump, J. A., primary, Ramadhani, H. O., additional, Morrissey, A. B., additional, Saganda, W., additional, Mwako, M. S., additional, Yang, L.-Y., additional, Chow, S.-C., additional, Morpeth, S. C., additional, Reyburn, H., additional, Njau, B. N., additional, Shaw, A. V., additional, Diefenthal, H. C., additional, Shao, J. F., additional, Bartlett, J. A., additional, and Maro, V. P., additional
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- 2011
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17. Patient costs for paediatric hospital admissions in Tanzania: a neglected burden?
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Saksena, P., primary, Reyburn, H., additional, Njau, B., additional, Chonya, S., additional, Mbakilwa, H., additional, and Mills, A., additional
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- 2010
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18. Factors associated with management of cervical cancer patients at KCMC Hospital, Tanzania: a retrospective cross-sectional study
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Mosha, D, primary, Mahande, M, additional, Ahaz, J, additional, Mosha, M, additional, Njau, B, additional, Kitalp, B, additional, and Obure, J, additional
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- 2009
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19. Perceived acceptability of home-based couples voluntary HIV counseling and testing in Northern Tanzania.
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Njau, B., Watt, M.H., Ostermann, J., Manongi, R., and Sikkema, K.J.
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DIAGNOSIS of HIV infections , *THERAPEUTICS , *HIV infections , *HIV infection epidemiology , *COUNSELING , *FOCUS groups , *HEALTH services accessibility , *INTERPERSONAL relations , *INTERVIEWING , *MARRIAGE , *RESEARCH methodology , *MEDICAL ethics , *PRIVACY , *RESEARCH funding , *RURAL conditions , *QUALITATIVE research , *PATIENTS' attitudes , *DESCRIPTIVE statistics - Abstract
It is estimated that 5.6% of the Tanzanian population ages 15–49 are infected with HIV, but only 30% of adults have ever had an HIV test. Couples' testing has proven to increase testing coverage and introduce HIV prevention, but barriers include access to testing services and unequal gender dynamics in relationships. Innovative approaches are needed to address barriers to couple's testing and increase uptake of HIV testing. Using qualitative data collection methods, a formative study was conducted to assess the acceptability of a home-based couples counseling and testing (HBCCT) approach. Eligible study participants included married men and women, HIV-infected individuals, health care and home-based care providers, voluntary counseling and testing counselors, and community leaders. A total of 91 individuals participated in focus group discussions (FGDs) and in-depth interviews conducted between September 2009 and January 2010 in rural settings in Northern Tanzania. An HBCCT intervention appears to be broadly acceptable among participants. Benefits of HBCCT were identified in terms of access, confidentiality, and strengthening the relationship. Fears of negative consequences from knowing one's HIV status, including stigma, blame, physical abuse, or divorce, remain a concern and a potential barrier to the successful provision of the intervention. Lessons for implementation highlighted the importance of appointments for home visits, building relationships of confidence and trust between counselors and clients, and assessing and responding to a couple's readiness to undergo HIV testing. HBCCT should addresses HIV stigma, emphasize confidentiality, and improve communication skills for disclosure and decision-making among couples. [ABSTRACT FROM PUBLISHER]
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- 2012
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20. Epizootiology of trypanosomiasis in Lambwe Valley, Kenya, East Africa
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Nesbitt, S. Tarimo, primary, Njau, B. C., additional, and Otieno, L. H., additional
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- 1991
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21. Gender differences in intention to remain a virgin until marriage among school pupils in rural northern Tanzania.
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Njau B, Mtweve S, Manongi R, and Jalipa H
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- 2009
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22. EPIZOOTIOLOGY OF TRYPANOSOMIASIS IN LAMBWE VALLEY, KENYA, EAST AFRICA.
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NESBITT, S. TARIMO, NJAU, B. C., and OTIENO, L. H.
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- 1991
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23. The response of trypanosome-infected water buffaloes and cattle in different areas of fly challenge to normal therapeutic doses of trypanocidal drugs.
- Author
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Njau, B. C., Mkonyi, P. A., and Lekaki, K. A. M.
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- 1986
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24. The Response of Trypanosome-Infected Water Buffaloes and Cattle in Different Areas of Fly Challenge To Normal Therapeutic Doses of Trypanocidal Drugs
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Njau, B., Mkonyi, P., and Lekaki, K.
- Abstract
Laboratory examination of blood smears from water buffaloes in an area of high fly challenge indicated an infection rate of 51.11 % caused by both Trypanosoma congolenseand T. vivax.A similar study in cattle raised in a low fly challenge area showed an infection rate of 22.73% caused by T. congolenseonly. Diminazene aceturate administered as a single dose at 3.5 mg/kg body weight cured the infection in cattle, while a similar dose at 7 mg/kg body weight failed to cure the water buffaloes. Cattle were further protected by a single dose of isometamidium chloride administered at 0.5 mg/kg body weight for 6 weeks of this study. On the other hand, isometamidium chloride administered at 1 mg/kg body weight cured transiently 90% of the infected water buffaloes and 10% persisted with a T. congolenseinfection. It was concluded that the lower dose rates approved by the manufacturers for the two trypanocides treated adequately infected cattle in a low challenge area, but such results were not achieved with the higher dose rates for infected water buffaloes in a high fly challenge area. L’examen de frottis sanguins de buffles (Bubalus bubalus)provenant d’une région fortement infestée de mouches tsé-tsé indique un taux d’infection de 51.11%, dû à Trypanosoma congolenseet T. vivax.Une étude similaire concernant les vaches dans une zone peu infestée montre un taux d’infection de 22.73%, causé par T. congolenseuniquement. De l’acéturate de diminazene administré en une dose de 3.5 mg/kg de poids vif soigne l’infection des vaches, alors que les buffles ne sont pas soignés par une dose de 7 mg/kg. Les vaches ont ensuite été protégées pendant 6 semaines grâce à une dose unique de 0.5 mg/kg de chlorure d’isométamidium, tandis que cette même drogue administrée à raison de 1 mg/kg ne soignait transitoirement que 90% des buffles, les 10% restant présentant une infection à T. congolense.On peut donc en conclure que les faibles doses recommandées par les fabricants pour chaque trypanocides sont adaptées à des vaches exposés à de faibles infestations, mais non à des buffles vivant dans des zones lourdement infestées par les glossines.
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- 1986
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25. Epizootiology of Trypanosomiasis in Lambwe Valley, Kenya, East Africa
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Tarimo Nesbitt, S., Njau, B., and Otieno, L.
- Abstract
The probability of a Glossina pallidipespicking up an infection from a single blood meal in Lambwe Valley was estimated to be 0.0092 for Trypanosoma vivax, 0.0028 for T. congolense, 0.00097 for T. bruceiand 0.00024 for the human infective T, brucei.In cattle, the prevalence of blood protozoa was Trypanosomaspp. 5.55%, Babesiaspp. 2% and Theileriaspp. 33.06%. Thirty-eight point three per cent of the cattle with trypanosomes also had Theileriaspp., 2.12% of the cattle with trypanosomes also had Babesiaspp. and 88.28% of the cattle with babesia had also Theileriaspp. La probabilité pour un Glossina pallidipesde transmettre une infection à partir d’une sucée de sang dans la Vallée le Lambwe a été estimée à 0,0092 pour la Trypanosoma vivax, 0,0028 pour T. congolense, 0,00097 pour T. bruceiet 0,00024 pour contagieux humain T. brucei.Chez les bovins, la prevalence du protozoaire du sang était: Trypanosomaspp. 5,55% Babesiaspp. 2% et Theileriaspp. 33,06. Trente huit virgule trois pour cent de bovins ayant le trypanosomes avaient aussi le Theileriaspp. 2,12% des bovins ayant des trypanosomes avaient aussi le Babesiaspp. et 88,28% des bovins ayant le babesia avaient aussi le Theileriaspp.
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- 1991
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26. Susceptibility of a Trypanosoma congolense Isola te of Water-Buffalo Origin to Diminazene Aceturate and Isometamidium Chloride.
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NJAU, B. C., MKONYI, P. A., and LEKAKI, K.
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- 1988
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27. Immunological Responses and the Role of the Paralyzing Toxin in Rabbits Infested with Rhipicephalus evertsi evertsi
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Njau, B. C., primary, Mutani, A., additional, and Nyindo, M., additional
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- 1986
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28. Susceptibility of a Trypanosoma congolense Isolate of Water-Buffalo Origin to Diminazene Aceturate and Isometamidium Chloride
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Njau, B. C., primary, Mkonyi, P. A., additional, and Lekaki, K., additional
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- 1988
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29. Susceptibility of a Trypanosoma congolenseIsolate of Water-Buffalo Origin to Diminazene Aceturate and Isometamidium Chloride
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Njau, B., Mkonyi, P., and Lekaki, K.
- Abstract
Laboratory mice infected with a Trypanosoma congolenseisolate of water-buffalo origin did not respond when treated with diminazene aceturate (Berenil, Hoechst, West Germany) at 3.5 mg/kg and 7 mg/kg body weight (b.wt.) and also isometamidium chloride (Samorin, May & Baker, Dagenham, England) at doses less than 3 mg/kg b.wt. Effective cure was achieved with isometamidium and diminazene at 3 mg/kg and 14 mg/kg b.wt. respectively; doses in excess of those recommended for use in the field to treat animal trypanosomiasis by the manufacturers. Irregular use of the two drugs on infected water-buffaloes while improperly restrained may be one of the factors responsible for the dual drug resistant T. congolenseisolate emerging. Des souris de laboratoire infectées par inoculation avec des isolats de Trypanosoma congolenseprélevés sur des buffles n’ont pas réagi à un traitement à l’acéturate de diminazène (B>erénil, Hoechst, Rép. féd. d’Allemagne) dosé à 3,5 et 7 mg/kg de poids vif, ni á des doses de moins de 3 mg/kg de poids vif de chlorure d’isométamidium (Samorin, May & Baker, Dagenham, Angleterre). Pour obtenir une guérison, il a fallu employer des doses de 3 mg/kg de poids vif d’isométamidium et de 14 mg/kg de poids vif de diminazène. Ces doses excèdent celles recommandées par les fabricants pour traiter la trypanosomiase animale sur le terrain. L’usage irrégulier et mal contrôlé de ces deux produits pour le traitement de buffles infectés explique en partie l’émergence d’isolats de T. congolenserésistants à ces deux médicaments.
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- 1988
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30. Mobile Phone-Based Confidential Social Network Referrals for HIV Testing (CONSORT): Protocol for a Randomized Controlled Trial.
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Ostermann J, Njau B, van Zwetselaar M, Yamanis T, McClimans L, Mwangi R, Beti M, Hobbie A, Gass SJ, Mtuy T, and Thielman N
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- Humans, Male, Female, Adult, Tanzania epidemiology, Social Networking, Text Messaging, Middle Aged, Telemedicine, HIV Infections diagnosis, HIV Infections epidemiology, HIV Infections prevention & control, Referral and Consultation, Cell Phone, HIV Testing methods
- Abstract
Background: Critical to efforts to end the HIV epidemic is the identification of persons living with HIV who have yet to be diagnosed and engaged in care. Expanded HIV testing outreach efforts need to be both efficient and ambitious, targeting the social networks of persons living with HIV and those at above-average risk of undiagnosed HIV infection. The ubiquity of mobile phones across many high HIV prevalence settings has created opportunities to leverage mobile health (mHealth) technologies to engage social networks for HIV testing outreach, prevention, and treatment., Objective: The purpose of this study is to evaluate the acceptability and efficacy of a novel mHealth intervention, "Confidential Social Network Referrals for HIV Testing (CONSORT)," to nudge at-risk individuals to test for HIV using SMS text messages., Methods: We will conduct the CONSORT study in Moshi, Tanzania, the commercial center and administrative capital of the Kilimanjaro Region in northern Tanzania. After qualitative formative work and pilot testing, we will enroll 400 clients presenting for HIV counseling and testing and 200 persons living with HIV and receiving care at HIV care and treatment centers as "inviters" into a randomized controlled trial. Eligible participants will be aged 18 years or older and live, work, or regularly receive care in Moshi. We will randomize inviters into 1 of 2 study arms. All inviters will be asked to complete a survey of their HIV testing and risk behaviors and to think of social network contacts who would benefit from HIV testing. They will then be asked to whom they would prefer to extend an HIV testing invitation in the form of a physical invitation card. Arm 1 participants will also be given the opportunity to extend CONSORT invitations in the form of automated confidential SMS text messages to any of their social network contacts or "invitees." Arm 2 participants will be offered physical invitation cards alone. The primary outcome will be counselor-documented uptake of HIV testing by invitees within 30 days of inviter enrollment. Secondary outcomes will include the acceptability of CONSORT among inviters, the number of new HIV diagnoses, and the HIV risk of invitees who present for testing., Results: Enrollment in the randomized controlled trial is expected to start in September 2024. The findings will be disseminated to stakeholders and published in peer-reviewed journals., Conclusions: If CONSORT is acceptable and effective for increasing the uptake of HIV testing, given the minimal costs of SMS text reminders and the potential for exponential but targeted growth using chain referrals, it may shift current practices for HIV testing programs in the area., Trial Registration: ClincalTrials.gov NCT05967208; https://clinicaltrials.gov/study/NCT05967208., International Registered Report Identifier (irrid): PRR1-10.2196/55068., (©Jan Ostermann, Bernard Njau, Marco van Zwetselaar, Thespina Yamanis, Leah McClimans, Rose Mwangi, Melkiory Beti, Amy Hobbie, Salomé-Joelle Gass, Tara Mtuy, Nathan Thielman. Originally published in JMIR Research Protocols (https://www.researchprotocols.org), 30.05.2024.)
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- 2024
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31. Predictors of prior HIV testing and acceptance of a community-based HIV test offer among male bar patrons in northern Tanzania.
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Madut DB, Manavalan P, Mtalo A, Peter T, Ostermann J, Njau B, and Thielman NM
- Abstract
Community-based HIV testing offers an alternative approach to encourage HIV testing among men in sub-Saharan Africa. In this study, we evaluated a community-based HIV testing strategy targeting male bar patrons in northern Tanzania to assess factors predictive of prior HIV testing and factors predictive of accepting a real-time HIV test offer. Participants completed a detailed survey and were offered HIV testing upon survey completion. Poisson regression was used to identify prevalence ratios for the association between potential predictors and prior HIV testing or real-time testing uptake. Of 359 participants analyzed, the median age was 41 (range 19-82) years, 257 (71.6%) reported a previous HIV test, and 321 (89.4%) accepted the real-time testing offer. Factors associated with previous testing for HIV (adjusted prevalence ratio [aPR], 95% CI) were wealth scores in the upper-middle quartile (1.25, 1.03-1.52) or upper quartile (1.35, 1.12-1.62) and HIV knowledge (1.04, 1.01-1.07). Factors that predicted real-time testing uptake were lower scores on the Gender-Equitable Men scale (0.99, 0.98-0.99), never testing for HIV (1.16, 1.03-1.31), and testing for HIV > 12 months prior (1.18, 1.06-1.31). We show that individual-level factors that influence the testing-seeking behaviors of men are not likely to impact their acceptance of an HIV offer., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Madut et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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32. Divergent preferences for enhanced HIV testing options among high-risk populations in northern Tanzania: a short report.
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Ostermann J, Njau B, Hobbie AM, Mtuy TB, Masnick M, Brown DS, Mühlbacher AC, and Thielman NM
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- Humans, Male, Female, Tanzania, Surveys and Questionnaires, HIV Testing, HIV Infections diagnosis, HIV Infections prevention & control, Sexually Transmitted Diseases diagnosis
- Abstract
To achieve the UNAIDS target of diagnosing 95% of all persons living with HIV, enhanced HIV testing services with greater attractional value need to be developed and implemented. We conducted a discrete choice experiment (DCE) to quantify preferences for enhanced HIV testing features across two high-risk populations in the Kilimanjaro Region in northern Tanzania. We designed and fielded a survey with 12 choice tasks to systematically recruited female barworkers and male mountain porters. Key enhanced features included: testing availability on every day of the week, an oral test, integration of a general health check or an examination for sexually transmitted infections (STI) with HIV testing, and provider-assisted confidential partner notification in the event of a positive HIV test result. Across 300 barworkers and 440 porters surveyed, mixed logit analyses of 17,760 choices indicated strong preferences for everyday testing availability, health checks, and STI examinations. Most participants were averse to oral testing and confidential partner notification by providers. Substantial preference heterogeneity was observed within each risk group. Enhancing HIV testing services to include options for everyday testing, general health checks, and STI examinations may increase the appeal of HIV testing offers to high-risk populations. Trial registration: ClinicalTrials.gov identifier: NCT02714140.
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- 2023
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33. Feasibility, Acceptability, and Potential Cost-Effectiveness of a Novel Mobile Phone Intervention to Promote Human Immunodeficiency Virus Testing Within Social Networks in Tanzania.
- Author
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Ostermann J, Njau B, Masaki M, Mtuy T, Itemba D, Hobbie A, Yelverton V, Moore S, Yamanis T, and Thielman NM
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- Cost-Benefit Analysis, Feasibility Studies, HIV, Humans, Social Networking, Tanzania epidemiology, Cell Phone, Text Messaging
- Abstract
Abstract: Among 145 individuals surveyed in Tanzania, 42% indicated willingness to test for human immunodeficiency virus in response to a confidential, phone-based text message. On average, participants were likely to provide contact information for 1.5 members of their social networks, suggesting high feasibility and moderate acceptability of a novel mHealth human immunodeficiency virus testing intervention., Competing Interests: Conflicts of Interest: None declared., (Copyright © 2022 American Sexually Transmitted Diseases Association. All rights reserved.)
- Published
- 2022
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34. Gap analysis between expectations and perceptions of pregnant women attending Prevention of Maternal to Child Transmission of HIV services in a private referral hospital in northern Tanzania: A cross-sectional descriptive study.
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John L, Odero N, Nziku J, and Njau B
- Abstract
Objective: Pregnant women satisfaction with the Prevention of Mother-To-Child HIV Transmission services is an essential parameter in the determination of the quality of care and performance. This study aimed to measure the gap between pregnant women expectations of PMTCT services and perceptions of the actual PMTCT services and the relationship between their service gap scores and socio-demographic characteristics., Methods: A cross-sectional descriptive study design was conducted from August to September 2020 on a sample of 105 participants. A pre-tested SERVIQUAL questionnaire was used to collect data and paired sample t-test, independent one-sample t-test, and one-way ANOVA was used to compare mean service gap scores. A p-value of < 0.05 was considered statistically significant., Results: The overall mean gap score was (+ 0.31) indicating pregnant women perceived value of the quality of care of PMTCT services. The gap score in the 5 service dimensions was as follows: empathy (+0.49), tangibles (+0.43), assurance (+0.22), responsiveness (+0.20), and reliability (+0.19). Marital status (p-value 0.031) was the only social demographic characteristic associated with pregnant women service gap scores., Conclusion: Overall, pregnant women perceptions of PMTCT services provided in the RCH clinic at KCMC were meet. Marital status was associated with the overall pregnant women service gap scores and perceived quality of care with PMTCT services. Pregnant women who were married had small service gap scores compared to either divorced or widowed or cohabiting women., Competing Interests: The authors have declared that no competing interests exist.
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- 2021
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35. What factors influence HIV testing? Modeling preference heterogeneity using latent classes and class-independent random effects.
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Ostermann J, Flaherty BP, Brown DS, Njau B, Hobbie AM, Mtuy TB, Masnick M, Mühlbacher AC, and Thielman NM
- Abstract
Efforts to eliminate the HIV epidemic will require increased HIV testing rates among high-risk populations. To inform the design of HIV testing interventions, a discrete choice experiment (DCE) with six policy-relevant attributes of HIV testing options elicited the testing preferences of 300 female barworkers and 440 male Kilimanjaro mountain porters in northern Tanzania. Surveys were administered between September 2017 and July 2018. Participants were asked to complete 12 choice tasks, each involving first- and second-best choices from 3 testing options. DCE responses were analyzed using a random effects latent class logit (RELCL) model, in which the latent classes summarize common participant preference profiles, and the random effects capture additional individual-level preference heterogeneity with respect to three attribute domains: (a) privacy and confidentiality (testing venue, pre-test counseling, partner notification); (b) invasiveness and perceived accuracy (method for obtaining the sample for the HIV test); and (c) accessibility and value (testing availability, additional services provided). The Bayesian Information Criterion indicated the best model fit for a model with 8 preference classes, with class sizes ranging from 6% to 19% of participants. Substantial preference heterogeneity was observed, both between and within latent classes, with 12 of 16 attribute levels having positive and negative coefficients across classes, and all three random effects contributing significantly to participants' choices. The findings may help identify combinations of testing options that match the distribution of HIV testing preferences among high-risk populations; the methods may be used to systematically design heterogeneity-focused interventions using stated preference methods., Competing Interests: Declaration of competing interest The authors declare that they have no conflict of interests.
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- 2021
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36. Effect on growth of exposure to maternal antiretroviral therapy in breastmilk versus extended infant nevirapine prophylaxis among HIV-exposed perinatally uninfected infants in the PROMISE randomized trial.
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Stranix-Chibanda L, Tierney C, Pinilla M, George K, Aizire J, Chipoka G, Mallewa M, Naidoo M, Nematadzira T, Kusakara B, Violari A, Mbengeranwa T, Njau B, Fairlie L, Theron G, Mubiana-Mbewe M, Khadse S, Browning R, Fowler MG, and Siberry GK
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- Adult, Female, Humans, Infant, Male, Anti-Retroviral Agents therapeutic use, Child Development, HIV Infections drug therapy, HIV Infections prevention & control, Milk, Human chemistry, Nevirapine analysis
- Abstract
Background: Malnutrition is highly prevalent in HIV-exposed perinatally uninfected infants (HEUs) increasing the risk of morbidity and mortality throughout the life course. We set out to compare the effect of postnatal exposure to maternal antiretroviral therapy (mART) in breastmilk versus infant Nevirapine prophylaxis (iNVP) on somatic growth of HEUs in the randomized PROMISE trial., Methods and Findings: We randomized 2431 mothers with HIV and their 2444 HEUs from six African countries and India 6-14 days after delivery to mART or iNVP for prevention of breastmilk HIV transmission. The mART regimen contained tenofovir/emtricitabine (99%) plus lopinavir/ritonavir. Infant growth parameters were compared at postnatal week 10, 26, 74 and 104 using World Health Organization (WHO) z-scores for length-for-age (LAZ), weight-for-age (WAZ), and head circumference-for-age (HCAZ). Week 26 LAZ was the primary endpoint measure. Student T-tests compared mean LAZ, WAZ, and HCAZ; estimated mean and 95% confidence interval (CI) are presented. Maternal and infant baseline characteristics were comparable between study arms. The estimated median breastfeeding duration was 70 weeks. After a mean follow-up of 88 weeks, mean LAZ and WAZ were below the WHO reference population mean at all timepoints, whereas mean HCAZ was not. The mART and iNVP arms did not differ for the primary outcome measure of LAZ at week 26 (p-value = 0.39; estimated mean difference (95%CI) of -0.05 (-0.18, 0.07)) or any of the other secondary growth outcome measures or timepoints (all p-values≥0.16). Secondary analyses of the primary outcome measure adjusting for week 0 LAZ and other covariates did not change these results (all p-values≥0.09). However, infants assigned to mART were more likely to have stunting compared to iNVP infants at week 26 (odds ratio (95% CI): 1.28 (1.05, 1.57))., Conclusions: In HEUs, growth effects from postnatal exposure to mART compared to iNVP were comparable for measures on length, weight and head circumference with no clinically relevant differences between the groups. Despite breastfeeding into the second year of life, length and weight were below reference population means at all ages in both arms. Further investment is needed to optimize postnatal growth of infants born to women with HIV., Clinical Trial Registration: ClinicalTrials.gov number NCT01061151., Competing Interests: The authors have declared that no competing interests exist.
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- 2021
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37. Increasing the Uptake of HIV Testing among Men in Tanzania: A Novel Intervention for Bar Patrons.
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Madut DB, Manavalan P, Mtalo A, Peter TA, Ostermann J, Njau B, and Thielman NM
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- Cities, Counseling, HIV Testing, Humans, Male, Mass Screening, Tanzania epidemiology, HIV Infections diagnosis, HIV Infections epidemiology, HIV Infections prevention & control
- Abstract
We investigated a novel community-based HIV testing and counseling (HTC) strategy by recruiting men from bars in northern Tanzania in order to identify new HIV infections. All bars in the town of Boma Ng'ombe were identified and male patrons were systematically invited to participate in a health study. HIV testing was offered to all enrolled participants. Outputs included HIV test yield, cost per diagnosis, and comparison of our observed test yield to that among male patients contemporaneously tested at five local facility-based HTC. We enrolled 366 participants and identified 17 new infections - providing a test yield of 5.3% (95% Confidence interval [CI] 3.3-8.4). The test yield among men contemporaneously tested at five local HTC centers was 2.1% (95% CI 1.6-2.8). The cost-per-diagnosis was $634. Our results suggest that recruiting male bar patrons for HIV testing is efficient for identifying new HIV infections. The scalability of this intervention warrants further evaluation.
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- 2021
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38. The effects of HIV self-testing on the uptake of HIV testing, linkage to antiretroviral treatment and social harms among adults in Africa: A systematic review and meta-analysis.
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Njau B, Damian DJ, Abdullahi L, Boulle A, and Mathews C
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- Africa, HIV Infections psychology, Humans, Anti-HIV Agents therapeutic use, HIV Infections diagnosis, HIV Infections drug therapy, HIV Testing statistics & numerical data, Patient Acceptance of Health Care statistics & numerical data, Self-Testing
- Abstract
Introduction: HIV infection is still a global public health problem. More than 75% of HIV-infected people are in Africa, and up to 54% are unaware of their HIV status, limiting access to antiretroviral treatment., Context and Purpose of the Study: This review aimed to determine whether HIV self-testing (HIVST) increases the uptake of testing, the yield of new HIV-positive diagnoses, and the linkage to antiretroviral treatment, and social harms among adults in Africa., Methods: PubMed, The Cochrane Central Register of Controlled Trials (CENTRAL), Pan African Clinical Trials Registry, The Cochrane Database of Systematic Reviews (CDSR), Databases of Abstracts of Reviews of Effectiveness (DARE), Social Sciences Citation Index, Web of Science and African Index Medicus databases were searched from 1998 to 2019 (updated in December 2019). Eligible trials employed randomized controlled trials (RCTs), before/after studies, and interrupted time series design comparing HIVST to standard HIV testing services or comparing different approaches to HIVST among adults living in Africa were systematically sought., Results: After searching 2,617 citations eleven trials were identified including 59,119 participants from four (4) African countries. Meta-analysis of seven trials showed a significant increase in the uptake of HIVST compared to standard HIV testing services: Both fixed-effects (Rate Ratio (RR) = 2.64, 95% CI: 2.51 to 2.79), and random-effects (RR) = 3.10, 95% CI: 1.80 to 5.37, and a significant increase in the uptake of couples' HIVST (RR = 2.50, 95% CI: 2.29 to 2.73 in fixed-effects models; and RR = 2.64, 95% CI: 2.01 to 3.49 in random-effects model). A decrease in linkage to care and ART was observed in HIVST compared to standard HIV testing services (RR = 0.88, 95% CI: 0.88 to 0.95 in fixed-effects models; and RR = 0.78, 95% CI: 0. 56 to 1.08 in random-effects models). Six RCTs measured social harms, with a total of ten reported cases related to HIVST. One RCT comparing two approaches to HIVST showed that offering home-based HIVST with optional home-initiation of antiretroviral treatment increased the reporting of a positive HIV test result (RR: 1.86; 95% CI: 1.16 to 2.98), and linkage to antiretroviral treatment (RR: 2.94; 95% CI: 2.10 to 4.12), compared with facility-based linkage to antiretroviral treatment., Conclusions: HIVST has the potential to increase the uptake of HIV testing compared to standard HIV testing services. Offering HIVST with optional home initiation of HIV care compared to HIVST with facility-based HIV care increases HIV positivity and linkage to antiretroviral treatment. Reported incidences of intimate partner violence related to HIVST were rare. Future research should focus on the potential of HIVST to reach first-time testers, the effect of using different approaches to HIVST, and strategies for linkage to HIV services., Systematic Review Registration: This systematic review was prospectively registered on the Prospero International Prospective Register of Systematic Review (CRD42015023935)., Competing Interests: The authors have declared that no competing interests exist.
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- 2021
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39. Correlates of Sexual Risky Behaviours, HIV Testing, and HIV Testing Intention among Sexually Active Youths in Northern Tanzania.
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Njau B, Mhando G, Jeremiah D, and Mushi D
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Background: HIV testing services are important entry-point into the HIV cascade to care and treatment in order to slow down the spread of HIV infection. Over half of all new HIV infections in Sub-Saharan Africa occur among young people under the age of 25, particularly women. The study aimed to determine factors influencing young people's decision to undergo HIV testing services in Northern Tanzania., Methods: A total of 536 sexually active participants aged 15 to 24 years old completed a semi-structured questionnaire based on the Health Belief Model (HBM) and the Theory of Planned Behaviour (TPB)., Results: Males compared to femaleparticipants were significantly younger at first age of sexual intercourse (15.4 vs. 16.7 years; p = .001 ). Out of 536 participants, 418(78%) reported inconsistent condom use, and 203/303(67%) were those practicing casual sex. Only, 189/536(35.3%) of the participants reported to have had an HIV-test. Age, socioeconomic status, perceived HIV severity, attitudes and social approval regarding testing and beliefs about testing procedures and perceived barriers to testing were significant predictors of HIV testing (R
2 =.22). Age, unsafe casual sex, perceived severity, HIV-testing attitudes, self-efficacy, social approval, cues for actions and perceived quality of testing procedures were significant and positively related to HIV-testing intentions, while perceived barriers to testing were negatively related (R2 = .36)., Conclusion: The integrated constructs of HBM and TPB provides a framework for identifying correlates of HIV testing behaviours and HIV testing intentions among sexually active youths. Future behaviour change interventions should focus on reduction of sexually risky behaviours, increasing perceived HIV severity, enhance positive attitudes and social approvals on testing, reduce misconceptions about testing procedures, alleviation of perceived barriers to testing and improve testing self-efficacy among sexually active youths in this setting., Competing Interests: Competing Interests: None declared., (© The East African Health Research Commission 2021.)- Published
- 2021
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40. Using discrete choice experiments to design interventions for heterogeneous preferences: protocol for a pragmatic randomised controlled trial of a preference-informed, heterogeneity-focused, HIV testing offer for high-risk populations.
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Ostermann J, Njau B, Hobbie A, Mtuy T, Masaki ML, Shayo A, van Zwetselaar M, Masnick M, Flaherty B, Brown DS, Mühlbacher AC, and Thielman NM
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- Counseling, Female, Humans, Male, Tanzania, HIV Infections diagnosis, HIV Testing
- Abstract
Introduction: Approximately one million undiagnosed persons living with HIV in Southern and Eastern Africa need to test for HIV. Novel approaches are necessary to identify HIV testing options that match the heterogeneous testing preferences of high-risk populations. This pragmatic randomised controlled trial (PRCT) will evaluate the efficacy of a preference-informed, heterogeneity-focused HIV counselling and testing (HCT) offer, for improving rates of HIV testing in two high-risk populations., Methods and Analysis: The study will be conducted in Moshi, Tanzania. The PRCT will randomise 600 female barworkers and 600 male Kilimanjaro mountain porters across three study arms. All participants will receive an HIV testing offer comprised of four preference-informed testing options, including one 'common' option-comprising features that are commonly available in the area and, on average, most preferred among study participants-and three options that are specific to the study arm. Options will be identified using mixed logit and latent class analyses of data from a discrete choice experiment (DCE). Participants in Arm 1 will be offered the common option and three 'targeted' options that are predicted to be more preferred than the common option and combine features widely available in the study area. Participants in Arm 2 will be offered the common option and three 'enhanced' options, which also include HCT features that are not yet widely available in the study area. Participants in Arm 3, an active control arm, will be offered the common option and three predicted 'less preferred' options. The primary outcome will be uptake of HIV testing., Ethics and Dissemination: Ethical approval was obtained from the Duke University Health System IRB, the University of South Carolina IRB, the Ethics Review Committee at Kilimanjaro Christian Medical University College, Tanzania's National Institute for Medical Research, and the Tanzania Food & Drugs Authority (now Tanzania Medicines & Medical Devices Authority). Findings will be published in peer-reviewed journals. The use of rigorous DCE methods for the preference-based design and tailoring of interventions could lead to novel policy options and implementation science approaches., Trial Registration Number: NCT02714140., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2020
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41. Predictors of mortality in treatment experienced HIV-infected patients in northern Tanzania.
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Madut DB, Park LP, Yao J, Reddy EA, Njau B, Ostermann J, Whetten K, and Thielman NM
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- Adult, Female, Humans, Male, Middle Aged, Prognosis, Tanzania, Acquired Immunodeficiency Syndrome drug therapy, Acquired Immunodeficiency Syndrome mortality, Anti-HIV Agents therapeutic use
- Abstract
Background: While factors that drive early mortality among people living with HIV (PLWH) initiating antiretroviral therapy (ART) in sub-Saharan Africa (SSA) have been described, less is known about the predictors of long-term mortality for those with ART experience., Methods: PLWH and on ART attending two HIV treatment clinics in Moshi, Tanzania were enrolled from 2008 through 2009 and followed for 3.5 years. Demographic, psychosocial, and clinical information were collected at enrollment. Plasma HIV RNA measurements were collected annually. Cause of death was adjudicated by two independent reviewers based on verbal autopsy information and medical records. Bivariable and multivariable analyses were conducted using Cox proportional hazard models to identify predictors of mortality., Results: The analysis included 403 participants. The median (IQR) age in years was 42 (36-48) and 277 (68.7%) participants were female. The proportion of participants virologically suppressed during the 4 collection time points was 88.5%, 94.7%, 91.5%, and 94.5%. During follow-up, 24 participants died; the overall mortality rate was 1.8 deaths per 100 person-years. Of the deaths, 14 (58.3%) were suspected to be HIV/AIDS related. Predictors of mortality (adjusted hazard ratio, 95% confidence interval) were male sex (2.63, 1.01-6.83), secondary or higher education (7.70, 3.02-19.60), receiving care at the regional referral hospital in comparison to the larger zonal referral hospital (6.33, 1.93-20.76), and moderate to severe depression symptoms (6.35, 1.69-23.87)., Conclusions: As ART coverage continues to expand in SSA, HIV programs should recognize the need for interventions to promote HIV care engagement for men and the integration of mental health screening and treatment with HIV care. Facility-level barriers may contribute to challenges faced by PLWH as they progress through the HIV care continuum, and further understanding of these barriers is needed. The association of higher educational attainment with mortality merits further investigation., Competing Interests: The authors have declared that no competing interests exist.
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- 2020
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42. Level of knowledge, acceptability, and willingness to use oral fluid HIV self-testing among medical students in Kilimanjaro region, Tanzania: a descriptive cross-sectional study.
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Vara PA, Buhulula LS, Mohammed FA, and Njau B
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- Adult, Cross-Sectional Studies, Female, Humans, Infant, Newborn, Male, Mass Screening, Self-Testing, Tanzania epidemiology, Young Adult, HIV Infections diagnosis, HIV Infections epidemiology, Students, Medical
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Background: HIV Self-Testing (HIVST) is universally accepted as an innovative strategy complimenting existing HIV testing services to archive the UNAIDS, 95-95-95 goals by 2030. However, the adoption of HIVST is lagging in most sub-Saharan countries, including Tanzania. This study aimed to determine the level of knowledge, acceptability, and willingness to use HIVST among Medical students in Kilimanjaro region, Tanzania., Methods: A descriptive cross-sectional study using a self-administered, semi-structured questionnaire was conducted from May to June 2019 among 271 medical students aged 18-44 years enrolled in a degree of Medicine course at Kilimanjaro Christian Medical University College., Results: A total of 271 participants were enrolled (response rate of 100%). The mean age was 23.9 (SD 2.9), the majority (91%) were Christians, being single (92%), and a half (50.2%) were males. More than half (55.7%) was sexually active, 67.5% reported the age of first sexual debut at 19 years and above. The majority (81.5%) reported that they had one sexual partner, 37% used condoms during the last sexual act. The majority (98.7%) had never had a sexually transmitted disease during the past 3 months, 22.5% reported using alcohol when having sex. More than three-quarters (79%) ever tested for HIV, and 41.6% tested for HIV in the past year. More than two-thirds (67.9%) had a high level of knowledge on oral fluid HIV self-test. Being a female was related with high level of knowledge (P = 0.225). The acceptability of HIVST was 62.7%, and about two-thirds showed a willingness to buy a self-test kit if available for public use., Conclusions: The high level of knowledge on oral fluid HIV self-testing, acceptability and willingness to buy self-test kit if available for public use among sexually active medical students underscores the importance of introducing HIVST as a complementary approach for existing HIV testing services in this setting. To make HIVST effective, interventionist should address concerns associated with self-testing, such as lack of pre and post-test counseling, suicidal risks after receiving HIV positive results, perceived risks of inaccurate HIVST test results, lack of linkage to care of individuals receiving HIV positive results, perceived risks of intimate partner violence, coercive testing of a female partner, and perceived high cost of buying self-test kits.
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- 2020
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43. Feasibility of an HIV self-testing intervention: a formative qualitative study among individuals, community leaders, and HIV testing experts in northern Tanzania.
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Njau B, Lisasi E, Damian DJ, Mushi DL, Boulle A, and Mathews C
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- Adolescent, Adult, Aged, Attitude, Feasibility Studies, Female, Focus Groups, HIV Infections epidemiology, Humans, Male, Middle Aged, Patient Acceptance of Health Care, Qualitative Research, Self Efficacy, Social Environment, Tanzania, Young Adult, HIV Infections diagnosis, Mass Screening methods, Self Care
- Abstract
Background: Achieving the 95-95-95 global targets by 2030, innovative HIV testing models, such as HIV self-testing are needed for people, who are unaware of their HIV status. We aimed to explore key informants, mountain climbing porters, and female bar workers' attitudes, perceived norms, and personal agency related to HIV self-testing., Methods: This was a formative qualitative study to inform the design of an HIV self-testing intervention in Northern Tanzania. Informed by the Integrated Behaviour Model, we conducted four focus group discussions, and 18 in-depth interviews with purposively selected participants. Data were analyzed using the framework method., Results: We recruited 55 participants. Most participants had positive attitudes towards HIVST, in that they anticipated positive consequences related to the introduction and uptake of HIVST. These included privacy and convenience, avoidance of long queues at health facilities, reduced counselor workload, and reduced indirect costs (given that transport to health facilities might not be required). Participants expressed the belief that significant people in their social environment, such as parents and peers, would approve their uptake of HIVST, and that they would accept HIVST. Additionally, features of HIVST that might facilitate its uptake were that it could be performed in private and would obviate visits to health facilities. Most participants were confident in their capacity to use HIVST kits, while a few were less confident about self-testing while alone. Strategies to maximize beliefs about personal agency and facilitate uptake included supplying the self-test kits in a way that was easy to access, and advocacy. Perceived potential constraints to the uptake of HIVST were the cost of buying the self-test kits, poverty, illiteracy, poor eyesight, fear of knowing one's HIV status, lack of policy/ guidelines for HIVST, and the absence of strategies for linkage to HIV care, treatment, and support., Conclusions: The findings suggest that HIVST may be feasible to implement in this study setting, with the majority of participants reporting positive attitudes, supportive perceived norms, and self-efficacy. Hence, future HIVST interventions should address the negative beliefs, and perceived barriers towards HIVST to increase HIV testing among the target population in Northern Tanzania.
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- 2020
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44. Pregnant Women Level of Satisfaction on Quality of Care in Reproductive and Child Health clinic at Huruma Designated District Hospital in Rombo District, Kilimanjaro Region, Tanzania.
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Kamanda S, Majaliwa J, Shehe R, Muro F, and Njau B
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Background: The clients' level of satisfaction is an important measure in assessing the quality of health care services provided in health facilities, and is important in enhancing the utilisation of health care services., Objectives: This study aimed to determine pregnant women's level of satisfaction on the quality of care in the Reproductive and Child Health (RCH) clinic at Huruma Designated District Hospital, Rombo Kilimanjaro., Methodology: A cross-sectional study was conducted from May to June 2018 using the Donabediean model. Using systematic sampling, 270 pregnant women were selected to participate in the study. Data was collected using a pre-tested Service Quality(SERVQUAL) questionnaire. Descriptive statistics were performed using univariate and bivariate analysis, and one sample t-test to compare mean gap scores. The principal component analysis was employed to identify key items that measure the quality of care. A p-value of <.05 was considered statistically significant., Results: Overall, pregnant women's level of satisfaction on the quality of care in the Reproductive and Child Health clinic at Huruma DDH was 48.5%. The overall mean gap score (±SD) for the level of satisfaction was -0.53 (±1.69) signifying dissatisfaction with the quality of care. The overall level of satisfaction was associated with level of education (p<.001), occupation (p=.003), residence (p=.035). The levels of dissatisfaction in the 5 service dimensions were: empathy (-0.05), responsiveness (-0.09), assurance (-0.10), tangible (-0.13), and reliability (-0.17)., Conclusion: Overall, pregnant women were dissatisfied with the quality of care provided. Pregnant women who are educated, being employed, and residing in Rombo were more likely to report dissatisfied with the quality of care. To improve the quality of care, lack of adequate staff and inadequate knowledge of the staff at RCH, and improvement in staff-clients interactions, and keeping scheduled appointments need to be improved., Competing Interests: Competing interests: The author(s) declare that they have no competing interests. Competing Interests: None declared., (© The East African Health Research Commission 2020.)
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- 2020
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45. A systematic review of qualitative evidence on factors enabling and deterring uptake of HIV self-testing in Africa.
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Njau B, Covin C, Lisasi E, Damian D, Mushi D, Boulle A, and Mathews C
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- Africa, Humans, Qualitative Research, HIV Infections diagnosis, Health Services Accessibility, Mass Screening methods
- Abstract
Background: More than 40% of adults in Sub-Saharan Africa are unaware of their HIV status. HIV self-testing (HIVST) is a novel approach with a potential to increase uptake of HIV testing and linkage to care for people who test HIV positive. We explored HIV stakeholder's perceptions about factors that enable or deter the uptake of HIV self-testing and experiences of self-testing of adult users in Africa., Methods: This systematic review of qualitative evidence included articles on qualitative studies published or made available between January 1998 to February 2018 on perspectives of key stakeholders, including HIV policymakers, HIV experts, health care providers, and adult men and women (18 years and above) about factors that enable or deter the uptake of HIV self-testing and experiences of self-testing among adult users. We searched CINAHL, MEDLINE in Pubmed, EMBASE, AJOL, PsycINFO, Social Science Citation Index (SSCI), and Web of Science for articles in English on HIVST with qualitative data from different African countries., Results: In total, 258 papers were retrieved, and only nine (9) studies conducted in 5 African countries were eligible and included in this synthesis. Perceived facilitators of the uptake of HIVST were autonomy and self-empowerment, privacy, confidentiality, convenience, opportunity to test, including couples HIV testing, and ease of use. The perceived barriers included the cost of buying self-test kits, perceived unreliability of test results, low literacy, fear and anxiety of a positive test result, and potential psychological and social harms. HIV stakeholder's concerns about HIVST included human right issues, lack of linkage to care, lack of face-to-face counseling, lack of regulatory and quality assurance systems, and quality of self-test kits. Actual HIVST users expressed preference of oral-fluid self-testing because of ease of use, and that it is less invasive and painless compared to finger-stick/whole blood-based HIV tests. Lack of clear instructions on how to use self-test kits, and existing different products of HIVST increases rates of user errors., Conclusions: Overcoming factors that may deter HIV testing, and HIVST, in particular, is complex and challenging, but it has important implications for HIV stakeholders, HIVST users, and public health in general. Research is warranted to explore the actual practices related to HIVST among different populations in Africa.
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- 2019
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46. A prospective study of the immune reconstitution inflammatory syndrome (IRIS) in HIV-infected children from high prevalence countries.
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Cotton MF, Rabie H, Nemes E, Mujuru H, Bobat R, Njau B, Violari A, Mave V, Mitchell C, Oleske J, Zimmer B, Varghese G, and Pahwa S
- Subjects
- Africa South of the Sahara epidemiology, Child, Preschool, Cryptococcus immunology, Cytomegalovirus immunology, Female, HIV-1 immunology, Humans, Incidence, India epidemiology, Infant, Male, Prevalence, Prospective Studies, Colitis epidemiology, Colitis immunology, Cytomegalovirus Infections epidemiology, Cytomegalovirus Infections immunology, HIV Infections epidemiology, HIV Infections immunology, Immune Reconstitution Inflammatory Syndrome epidemiology, Immune Reconstitution Inflammatory Syndrome immunology, Meningitis, Cryptococcal epidemiology, Meningitis, Cryptococcal immunology
- Abstract
Background: The immune reconstitution inflammatory syndrome (IRIS) in HIV-infected infants and young children is relatively understudied in regions endemic for HIV and TB. We aimed to describe incidence, clinical features and risk factors of pediatric IRIS in Sub-Saharan Africa and India., Methods and Findings: We conducted an observational multi-centred prospective clinical study from December 2010 to September 2013 in children <72 months of age recruited from public antiretroviral programs. The main diagnostic criterion for IRIS was a new or worsening inflammatory event after initiating antiretroviral therapy (ART). Among 198 participants, median age 1.15 (0.48; 2.21) years, 38 children (18.8%) developed 45 episodes of IRIS. Five participants (13.2%) had two IRIS events and one (2.6%) had 3 events. Main causes of IRIS were BCG (n = 21; 46.7%), tuberculosis (n = 10; 22.2%) and dermatological, (n = 8, 17.8%). Four TB IRIS cases had severe morbidity including 1 fatality. Cytomegalovirus colitis and cryptococcal meningitis IRIS were also severe. BCG IRIS resolved without pharmacological intervention. On multivariate logistic regression, the most important baseline associations with IRIS were high HIV viral load (likelihood ratio [LR] 10.629; p = 0.0011), recruitment at 1 site (Stellenbosch University) (LR 4.01; p = 0.0452) and CD4 depletion (LR 3.4; p = 0.0654). Significantly more non-IRIS infectious and inflammatory events between days 4 and 17 of ART initiation were noted in cases versus controls (35% versus 15.2%: p = 0.0007)., Conclusions: IRIS occurs commonly in HIV-infected children initiating ART and occasionally has severe morbidity. The incidence may be underestimated. Predictive, diagnostic and prognostic biomarkers are needed., Competing Interests: The authors have declared that no competing interests exist.
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- 2019
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47. Developing national strategies for reaching men with HIV testing services in Tanzania: results from the male catch-up plan.
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Conserve DF, Issango J, Kilale AM, Njau B, Nhigula P, Memiah P, Mbita G, Choko AT, Hamilton A, and King G
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- Adolescent, Adult, Condoms statistics & numerical data, Humans, Interviews as Topic, Male, Mass Screening, Middle Aged, Qualitative Research, Sexual Partners, Tanzania, Young Adult, HIV Infections diagnosis, Health Planning, Health Services Accessibility
- Abstract
Background: According to the 2016-2017 Tanzania HIV Impact Survey, 55% of men diagnosed with HIV during the survey self-reported that they were unaware of their HIV status. As a response, the Government of Tanzania launched a Test and Treat campaign in June 2018 with a focus on reaching men and developed the 2018-2020 Male Catch-Up plan. This article reports (1) the enablers and barriers of HIV testing services (HTS) uptake among men (2) and describes the strategies that were proposed as part of the Male Catch-Up Plan to address some of these barriers., Method: Qualitative in-depth interviews were conducted with 23 men in Dar es Salaam to explore HTS enablers and barriers. To develop the Male Catch-Up Plan strategies, a desk review of published studies, and analyses of national implementers of HIV/AIDS interventions were conducted. An additional 123 interviews were also carried out with key implementers of HIV/AIDS interventions, healthcare workers, secondary school boys and members of the community in Iringa and Tanga., Results: Enablers of HTS included the desire to check one's health, high HIV risk perception, wanting to protect oneself if tested negative, and being encouraged by their sexual partners. Barriers of HTS were fear of a positive test result, and low HIV risk perception. Proposed strategies from the Male Catch-Up Plan to address these barriers included non-biomedical and biomedical approaches. Non-biomedical strategies are social and cultural approaches to promote an enabling environment to encourage health seeking behavior, safe behavior, and providing peer education programs and social marketing to promote condoms. Biomedical approaches consisted of expanding targeted HIV testing, HIV self-testing, and integrating HIV services with other health services., Conclusion: A number of barriers contribute to the low uptake of HTS among men in Tanzania. National strategies have been developed to address these HTS barriers and guide the national Test and Treat campaign focusing on increasing HTS uptake among men.
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- 2019
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48. Trends in maternal and neonatal mortality in South Africa: a systematic review.
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Damian DJ, Njau B, Lisasi E, Msuya SE, and Boulle A
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- Female, Humans, Infant, Infant, Newborn, South Africa epidemiology, Infant Mortality, Maternal Mortality
- Abstract
Background: Measuring and monitoring progress towards Millennium Development Goals (MDG) 4 and 5 required valid and reliable estimates of maternal and child mortality. In South Africa, there are conflicting reports on the estimates of maternal and neonatal mortality, derived from both direct and indirect estimation techniques. This study aimed to systematically review the estimates made of maternal and neonatal mortality in the period from 1990 to 2015 in South Africa and determine trends over this period., Methods: Nationally-representative studies reporting on maternal and neonatal mortality in South Africa were included for synthesis. Literature search for eligible studies was conducted in five electronic databases: Medline, Africa-Wide Information, Scopus, Web of Science and CINAHL. Searches were restricted to articles written in English and presenting data covering the period between 1990 and 2015. Reference lists of retrieved articles were screened for additional publications, and grey literature was searched for relevant documents for the review. Three independent reviewers were involved in study selection, data extractions and achieving consensus., Results: In total, 969 studies were retrieved and 670 screened for eligibility yielding 25 studies reporting data on maternal mortality and 14 studies on neonatal mortality. Most of the studies had a low risk of bias. Estimates from the institutional reporting differed from the international metrics with wide uncertainty/confidence intervals. Moreover, modelled estimates were widely divergent from estimates obtained through empirical methods. In the last two decades, both maternal and neonatal mortality appear to have increased up to 2009, followed by a decrease, more pronounced in the care of maternal mortality., Conclusion: Estimates from both global metrics and institutional reporting, although widely divergent, indicate South Africa has not achieved MDG 4a and 5a goals but made a significant progress in reducing maternal and neonatal mortality. To obtain more accurate estimates, there is a need for applying additional estimation techniques which utilise available multiple data sources to correct for underreporting of these outcomes, perhaps the capture-recapture method., Systematic Review Registration: PROSPERO CRD42016042769.
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- 2019
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49. Prevalence of occupational injuries and knowledge of availability and utilization of post exposure prophylaxis among health care workers in Singida District Council, Singida Region, Tanzania.
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Kimaro L, Adinan J, Damian DJ, and Njau B
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- Adult, Female, HIV Infections rehabilitation, HIV Infections transmission, HIV Infections virology, Health Knowledge, Attitudes, Practice, Humans, Infectious Disease Transmission, Patient-to-Professional, Male, Middle Aged, Needlestick Injuries pathology, Needlestick Injuries rehabilitation, Occupational Exposure prevention & control, Occupational Injuries pathology, Occupational Injuries rehabilitation, Occupational Injuries virology, Post-Exposure Prophylaxis methods, HIV Infections epidemiology, Health Personnel, Needlestick Injuries epidemiology, Occupational Injuries epidemiology
- Abstract
Background: Infection with Human Immunodeficiency Virus is a serious public health problem that threatens the lives of many people including health care workers. Health care workers are frequently exposed to occupational hazards throughout their careers. Health care workers are at risk of being infected by the virus when caring for patients in health care facilities. Utilization of HIV Post-exposure Prophylaxis (HIV PEP) is very vital once an individual is exposed., Aim: The aim of this study is to determine the prevalence of occupational exposure, knowledge of, availability and utilization of post exposure prophylaxis among health care workers in Singida District Council, Tanzania., Methods: A descriptive cross sectional study was conducted from April to May 2013. Health care workers actively treating patients were enrolled from 18 heath facilities in Singida District Council. Data were collected using a self-administered questionnaire, and analysed using Stata version 12., Results: Out of 239 participants, slightly more than half, 124 (52%) had inadequate overall knowledge of HIV PEP. Of the 239, 121(50.6%) participants experienced occupational exposure. Two leading types of exposure were blood splash 57(47.1%) and needle stick injuries 45 (37.2%),respectively. Among the 121 exposed participants, 83(68.6%) reported the exposure incident, 91(75.2%) had an HIV test, 32 (26.4%), started HIV PEP after testing, 28 (23.1%), completed HIV PEP, and 65 (53.7%) had a follow-up HIV test. About two thirds (159/239), of participants reported that HIV PEP services were available at the time the study was conducted, and 49 (20.5%), reported daily access to HIV PEP service., Conclusion: The prevalence of occupational exposure among health care workers is high with low utilization of HIV PEP. The majority of healthcare workers had inadequate knowledge of HIV PEP. The findings highlight the need to improve the level of knowledge of HIV PEP and utilization of PEP among this at-high-risk-group in Singida., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2018
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50. Perceptions of Mental Disorders and Help-Seeking Behaviour for Mental Health Care Within the Maasai Community of Northern Tanzania: An Exploratory Qualitative Study.
- Author
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Daniel M, Njau B, Mtuya C, Okelo E, and Mushi D
- Abstract
Background: Mental disorders are rapidly becoming more prevalent worldwide and are estimated to contribute up to 15% of the global burden of disease by 2020. In Africa, the help-seeking behaviour for mental health care is complex and is hindered by misconceptions and negative attitudes towards mental disorders. This study aimed to explore perceptions of mental disorders and help-seeking behaviour for mental health care within the Maasai community in northern Tanzania., Methods: This qualitative study enrolled a purposive sample of 41 participants from a Maasai community in Arusha Region, northern Tanzania. Participants included modern health-care providers, religious leaders, traditional practitioners, local government leaders, local Maasai leaders, and workers from nongovernmental organisations dealing with mental health. Local interviewers used interview guides to conduct in-depth interviews and focus group discussions in the local language, Kiswahili. The interviews were completed between April and May 2013. We used content analysis to analyse the qualitative data., Results: Study participants attributed mental disorders to supernatural causes, such as curses, witchcraft, demons, and God's will. A few participants also mentioned biological causes and risk behaviours, including perinatal insults, head injuries, and drug abuse. Furthermore, we found that the Maasai community seeks mental health care in a sequential and simultaneous manner from 3 sectors, namely, professional health-care providers, traditional healers, and religious leaders. Traditional healers and religious leaders were preferred over professional health-care providers for the treatment of mental disorders., Conclusion: The Maasai have pluralistic help-seeking behaviour for mental health disorders. Integrating traditional healers in the modern health-care system may be beneficial to addressing mental health issues in this setting., Competing Interests: Competing Interests: None declared., (© The East African Health Research Commission 2018.)
- Published
- 2018
- Full Text
- View/download PDF
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