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Introduction: Mass vaccinations are a main strategy in the deployment of oral cholera vaccines. Campaigns avoid giving vaccine to pregnant women because of the absence of safety data of the killed whole-cell oral cholera (rBS-WC) vaccine. Balancing this concern is the known higher risk of cholera and of complications of pregnancy should cholera occur in these women, as well as the lack of expected adverse events from a killed oral bacterial vaccine. Methodology/Principal Findings: From January to February 2009, a mass rBS-WC vaccination campaign of persons over two years of age was conducted in an urban and a rural area (population 51,151) in Zanzibar. Pregnant women were advised not to participate in the campaign. More than nine months after the last dose of the vaccine was administered, we visited all women between 15 and 50 years of age living in the study area. The outcome of pregnancies that were inadvertently exposed to at least one oral cholera vaccine dose and those that were not exposed was evaluated. 13,736 (94%) of the target women in the study site were interviewed. 1,151 (79%) of the 1,453 deliveries in 2009 occurred during the period when foetal exposure to the vaccine could have occurred. 955 (83%) out of these 1,151 mothers had not been vaccinated; the remaining 196 (17%) mothers had received at least one dose of the oral cholera vaccine. There were no statistically significant differences in the odds ratios for birth outcomes among the exposed and unexposed pregnancies. Conclusions/Significance: We found no statistically significant evidence of a harmful effect of gestational exposure to the rBS-WC vaccine. These findings, along with the absence of a rational basis for expecting a risk from this killed oral bacterial vaccine, are reassuring but the study had insufficient power to detect infrequent events. Trial Registration: ClinicalTrials.gov NCT00709410 Author Summary: Pregnant women are more vulnerable to complications of cholera than other people. It would be helpful to include pregnant women in vaccination campaigns against cholera but pregnant women and their unborn children are highly vulnerable to the potential adverse effects of biological products such as vaccines. The safety of oral cholera vaccines in pregnant women has up to now not been evaluated. During a large mass cholera vaccination campaign in Zanzibar in 2009, women were advised not to participate if they thought they may be pregnant. The large majority (955 or 83%) of women residing in the study area who were to be pregnant during the 9 months following the vaccinations did not participate in the campaign. The remaining 196 (17%) women received the vaccine. A comparison between vaccine exposed and unexposed pregnancies did not reveal any significant differences in outcome between the two groups. The small number of miscarriages, infant deaths and ill infants was similarly distributed between the two groups. These findings are reassuring but continued monitoring of this vaccine when given during pregnancy is recommended. [ABSTRACT FROM AUTHOR]

Introduction: Mass vaccinations are a main strategy in the deployment of oral cholera vaccines. Campaigns avoid giving vaccine to pregnant women because of the absence of safety data of the killed whole-cell oral cholera (rBS-WC) vaccine. Balancing this concern is the known higher risk of cholera and of complications of pregnancy should cholera occur in these women, as well as the lack of expected adverse events from a killed oral bacterial vaccine. Methodology/Principal Findings: From January to February 2009, a mass rBS-WC vaccination campaign of persons over two years of age was conducted in an urban and a rural area (population 51,151) in Zanzibar. Pregnant women were advised not to participate in the campaign. More than nine months after the last dose of the vaccine was administered, we visited all women between 15 and 50 years of age living in the study area. The outcome of pregnancies that were inadvertently exposed to at least one oral cholera vaccine dose and those that were not exposed was evaluated. 13,736 (94%) of the target women in the study site were interviewed. 1,151 (79%) of the 1,453 deliveries in 2009 occurred during the period when foetal exposure to the vaccine could have occurred. 955 (83%) out of these 1,151 mothers had not been vaccinated; the remaining 196 (17%) mothers had received at least one dose of the oral cholera vaccine. There were no statistically significant differences in the odds ratios for birth outcomes among the exposed and unexposed pregnancies. Conclusions/Significance: We found no statistically significant evidence of a harmful effect of gestational exposure to the rBS-WC vaccine. These findings, along with the absence of a rational basis for expecting a risk from this killed oral bacterial vaccine, are reassuring but the study had insufficient power to detect infrequent events. [ABSTRACT FROM AUTHOR]

Key Points: Question: Can a linkage case management intervention decrease mortality among people with HIV in Tanzania during the first year after hospital discharge? Finding: In this randomized clinical trial that involved 500 hospitalized people with HIV, a linkage case management intervention did not reduce 12-month mortality (17.2% with intervention vs 16.8% with standard care; hazard ratio, 1.01; 95% CI, 0.66-1.55; P =.96). Meaning: Among hospitalized people with HIV, linkage case management did not reduce 12-month mortality. Importance: Despite the widespread availability of antiretroviral therapy (ART), people with HIV still experience high mortality after hospital admission. Objective: To determine whether a linkage case management intervention (named "Daraja" ["bridge" in Kiswahili]) that was designed to address barriers to HIV care engagement could improve posthospital outcomes. Design, Setting, and Participants: Single-blind, individually randomized clinical trial to evaluate the effectiveness of the Daraja intervention. The study was conducted in 20 hospitals in Northwestern Tanzania. Five hundred people with HIV who were either not treated (ART-naive) or had discontinued ART and were hospitalized for any reason were enrolled between March 2019 and February 2022. Participants were randomly assigned 1:1 to receive either the Daraja intervention or enhanced standard care and were followed up for 12 months through March 2023. Intervention: The Daraja intervention group (n = 250) received up to 5 sessions conducted by a social worker at the hospital, in the home, and in the HIV clinic over a 3-month period. The enhanced standard care group (n = 250) received predischarge HIV counseling and assistance in scheduling an HIV clinic appointment. Main Outcomes and Measures: The primary outcome was all-cause mortality at 12 months after enrollment. Secondary outcomes related to HIV clinic attendance, ART use, and viral load suppression were extracted from HIV medical records. Antiretroviral therapy adherence was self-reported and pharmacy records confirmed perfect adherence. Results: The mean age was 37 (SD, 12) years, 76.8% were female, 35.0% had CD4 cell counts of less than 100/μL, and 80.4% were ART-naive. Intervention fidelity and uptake were high. A total of 85 participants (17.0%) died (43 in the intervention group; 42 in the enhanced standard care group); mortality did not differ by trial group (17.2% with intervention vs 16.8% with standard care; hazard ratio [HR], 1.01; 95% CI, 0.66-1.55; P =.96). The intervention, compared with enhanced standard care, reduced time to HIV clinic linkage (HR, 1.50; 95% CI, 1.24-1.82; P <.001) and ART initiation (HR, 1.56; 95% CI, 1.28-1.89; P <.001). Intervention participants also achieved higher rates of HIV clinic retention (87.4% vs 76.3%; P =.005), ART adherence (81.1% vs 67.6%; P =.002), and HIV viral load suppression (78.6% vs 67.1%; P =.01) at 12 months. The mean cost of the Daraja intervention was about US $22 per participant including startup costs. Conclusions and Relevance: Among hospitalized people with HIV, a linkage case management intervention did not reduce 12-month mortality outcomes. These findings may help inform decisions about the potential role of linkage case management among hospitalized people with HIV. Trial Registration: ClinicalTrials.gov Identifier: NCT03858998 This randomized trial assesses whether a linkage case management intervention reduces 12-month mortality compared with enhanced standard care among people with HIV not taking antiretroviral therapy (ART) who were hospitalized for any reason. [ABSTRACT FROM AUTHOR]

Estimates for prevalence of high blood pressure (BP) among adolescents in Africa vary widely and few studies, if any, have documented the results of the recommended stepwise BP screening. In this cross-sectional study in Tanzania, we aimed to estimate prevalence of sustained high BP in 3 public secondary schools using the American Academy of Pediatrics BP screening strategy. On Day 1, one screening automated office BP (AOBP) measurement (Step 1) was followed by two more AOBP measurements (Step 2). Repeat AOBP measurements were obtained after about one month on adolescents with high AOBP measurements on Day 1 (Step 3). Participants with sustained high BP underwent 24-h ambulatory BP monitoring (step 4). Of all 500 enrolled participants, the prevalence of high blood pressure at each step in the process was 36.6% (183), 25.6% (128), 10.2% (51), and 2.6%(13) respectively for Steps 1–4. All except 6 students completed all 4 steps of the BP screening algorithm as indicated. We conclude that diagnosis of hypertension in African adolescents should use multiple AOBP measurements over multiple days followed by 24-h ABPM. Screening for high BP in school settings appears to be feasible and could provide a platform for cardiovascular disease education and health promotion. [ABSTRACT FROM AUTHOR]

New classes of long-lasting insecticidal nets (LLINs) containing two active ingredients have been recently recommended by WHO in areas where malaria vectors are resistant to pyrethroids. This policy was based on evidence generated by the first 2 years of our recently published trial in Tanzania. In this Article, we report the final third-year trial findings, which are necessary for assessing the long-term effectiveness of new classes of LLIN in the community and the replacement intervals required. A third year of follow-up of a four-arm, single-blind, cluster-randomised controlled trial of dual active ingredient LLINs was conducted between July 14, 2021, and Feb 10, 2022, in Misungwi, Tanzania. Restricted randomisation was used to assign 84 clusters to the four LLIN groups (1:1:1:1) to receive either standard pyrethroid (PY) LLINs (reference), chlorfenapyr–PY LLINs, pyriproxyfen–PY LLINs, or piperonyl butoxide (PBO)–PY LLINs. All households received one LLIN for every two people. Data collection was done in consenting households in the cluster core area with at least one child between 6 months and 15 years of age who permanently resided in the selected household. Exclusion criteria were householders absent during the visit, living in the cluster buffer area, no adult caregiver capable of giving informed consent, or eligible children who were severely ill. Field staff and study participants were masked to allocation, and those analysing data were not. The primary 24-month endpoint was reported previously; here, we present the secondary outcome, malaria infection prevalence in children at 36 months post LLIN distribution, reported in the intention-to-treat analysis. The trial was registered with ClinicalTrials.gov (NCT03554616) and is now complete. Overall usage of study nets was 1023 (22·3%) of 4587 people at 36 months post distribution. In the standard PY LLIN group, malaria infection was prevalent in 407 (37·4%) of 1088 participants, compared with 261 (22·8%) of 1145 in the chlorfenapyr–PY LLIN group (odds ratio 0·57, 95% CI 0·38–0·86; p=0·0069), 338 (32·2%) of 1048 in the PBO–PY LLIN group (0·95, 0·64–1·42; p=0·80), and 302 (28·8%) of 1050 in the pyriproxyfen–PY LLIN group (0·82, 0·55–1·23; p=0·34). None of the participants or caregivers reported side-effects. Despite low coverage, the protective efficacy against malaria offered by chlorfenapyr–PY LLINs was superior to that provided by standard PY LLINs over a 3-year LLIN lifespan. Appropriate LLIN replacement strategies to maintain adequate usage of nets will be necessary to maximise the full potential of these nets. Department for International Development, UK Medical Research Council, Wellcome Trust, Department of Health and Social Care, and Bill & Melinda Gates Foundation via the Innovative Vector Control Consortium. [ABSTRACT FROM AUTHOR]

Food insecurity is a potential predictor of intimate partner violence. This study (1) describes the prevalence of food insecurity and various forms of intimate partner violence experience among women in Mwanza, Tanzania; and (2) assesses the effect of food insecurity and hunger on various forms of women's experience of intimate partner violence longitudinally. Women (aged 18–70 years) who reported being in a relationship in the past 12 months, who had participated in the control arms of two randomized controlled trials conducted as part of the MAISHA study were interviewed at four time points (N=1,004 at baseline in 2017). Analyses were conducted in 2022. Associations between food insecurity exposures and intimate partner violence outcomes were assessed, and univariate random effect logistic models were conducted to identify relevant sociodemographic variables (including age, education level, and SES) that were statistically significant. Multivariable random effects logistic models were conducted, including time as a fixed effect, to calculate odds ratios indicating associations between food insecurity exposures and intimate partner violence outcomes. Prevalence of food insecurity was 47.7%, 55.6%, 47.2%, and 50.8% for each of the 4 waves, respectively, with significant difference in proportion of food insecurity between baseline and Wave 2. Multivariable random effects models indicated that food insecurity was associated with increased odds of exposure to all forms of intimate partner violence outcomes, and hunger was significantly associated with increased odds of experience of all intimate partner violence outcomes, apart from controlling behaviors. Results from this longitudinal analysis of food insecurity and women's reports of intimate partner violence experience in a low- and middle-income country setting indicate that food insecurity is significantly associated with all forms of intimate partner violence, apart from controlling behaviors, among women in this sample in Mwanza, Tanzania. Policy and programmatic implications include the need for integrated intimate partner violence prevention programming to take into account household food needs. [ABSTRACT FROM AUTHOR]

Objectives: This cross‐sectional survey aimed to explore associations between age of menarche, early sexual debut and high‐risk sexual behaviour among urban Tanzanian schoolgirls. Methods: Secondary schoolgirls aged 17–18 years from Mwanza, Tanzania, participated in structured face‐to‐face questionnaire‐based interviews, conducted by nurses and clinicians. Age of menarche was evaluated in categories of 11–12, 13–14, 15–16 or ≥17 years. Primary outcome measures were self‐reported early sexual debut (first vaginal sex at <16 years) and high‐risk sexual behaviour, including non‐use of condoms, having sex for gifts/money, having older sexual partners and/or other risky behaviours. Results: Of 401 girls enrolled, 174 (43.4%) reported prior vaginal sex. Prevalence of early sexual debut was 14.2% but pressured/forced sex and risky sexual behaviours were common. Adjusted for potential confounding, younger age at menarche was associated with early sexual debut (adjusted odds ratio for linear trend: 1.88 per category, 95% confidence interval: 1.21–2.92, p = 0.005). This association remained after excluding girls with first sex at <8 years or experiencing pressure or force at first sex. Further, adjusted for potential confounding (including ever experiencing forced sex), early sexual debut was associated with high‐risk sexual behaviour (adjusted odds ratio: 2.85, 95% confidence interval: 1.38–5.88, p = 0.004). Conclusions: Among urban Tanzanian school girls, younger age of menarche was associated with early sexual debut, and early sexual debut was associated with high‐risk sexual behaviour. Researchers and public health professionals developing and delivering interventions aimed at preventing adverse sexual health outcomes should consider the impact of these early biological and sexual exposures. [ABSTRACT FROM AUTHOR]

Although alcohol consumption is a well-known risk factor for intimate partner violence (IPV) perpetration, few studies have been conducted among young males in low- and middle-income countries. Alcohol consumption and IPV are both complex phenomena, whose association requires more in-depth exploration regarding drinking patterns and the alcohol-related manifestation of five different forms of IPV. In this study, we sought to explore the relationship between alcohol use and IPV in young Tanzanian men and to identify differences in the magnitude of past-year IPV perpetration among alcohol drinkers and abstainers. Furthermore, we aimed to assess the association between various drinking patterns with the perpetration of different forms of IPV. A cross-sectional survey of 1002 young males residing in Mwanza, Tanzania, was conducted in 2021–2022. Data on alcohol consumption were collected using the alcohol use disorder identification test. IPV perpetration was assessed using an index total of 19 items on acts of physical, sexual, economic, emotional abuse, and controlling behaviour. Logistic regression models were conducted to estimate the relationship between alcohol use and the perpetration of each form of IPV. Among partnered respondents currently consuming alcohol (n = 189, 18.8%), the most and the least prevalent IPV forms in the past 12 months were controlling behaviour (84.1%) and physical IPV (25.4%), respectively. Those reporting recent alcohol consumption reported higher rates of all forms of past-year IPV perpetration compared to abstainers. While no form of IPV was associated with low-risk consumption versus abstention, all forms of IPV were associated with hazardous drinking. Young men who drink alcohol, especially those drinking hazardously, are also more likely to report perpetrating IPV. An understanding of the different drinking patterns and manifestations of forms of IPV can contribute to better-tailored alcohol-related interventions and has the potential to improve young adults' health and reduce IPV perpetration. [ABSTRACT FROM AUTHOR]

Purpose: Depression and suicidal thoughts are associated with intimate partner violence, a major public health problem. Yet little is known about this association among young men in sub-Saharan Africa. This study aims to investigate the relationship between depression, suicidal thoughts and intimate partner violence perpetration, among young men in Tanzania from a representative community-based sample.We conducted a cross sectional survey among 1002 young men aged between 18 and 24 years residing in Mwanza city, Tanzania. Participants were randomly selected from 6 wards that included 3 densely and 3 sparsely populated wards from the Ilemela and Nyamagana districts that were selected using a probability-based multi-stage cluster sampling approach. We collected data on participant’s socio-demographics, depression symptoms using the PHQ9, suicidal thoughts, other psychosocial factors, and perpetration of different forms of intimate partner violence. Analysis was done using Stata version 17.0 and restricted to 828 participants who self-reported being in intimate relationships in the past twelve months. Bivariate and multivariable logistic regression models were employed to determine the association between the outcome variables with intimate partner violence perpetration and other psychosocial factors.Out of 828 young men, 333(40.2%) reported depressive symptoms and 93(11.9%) suicidal thoughts, with 725(87.6%) reporting ever perpetrating any form of intimate partner violence and 653(78.9%) reporting it in the past 12 months. After adjusting for other factors in multivariable models, depressive symptoms were significantly associated with sexual intimate partner violence perpetration (aOR = 2.19, 95%CI = 1.57, 3.04), economic intimate partner violence perpetration (aOR = 1.32 95%CI = 1.01, 1.74), emotional intimate partner violence perpetration (aOR = 1.76, 95%CI = 1.26, 2.46) and controlling behaviours (aOR = 1.46 95%CI = 1.10, 1.93).Depression is a common health problem strongly associated with intimate partner violence perpetration in this study population. Effective interventions to address depression and other mental health problems may help to reduce intimate partner violence perpetration in this population.Researchers and practitioners should develop theory-based research and intervention programmes to address mental health problems such as depression and suicidal thoughts and the perpetration of intimate partner violence. The socio-ecological framework provides an insightful model for multiple level analysis and intervention.Methods: Depression and suicidal thoughts are associated with intimate partner violence, a major public health problem. Yet little is known about this association among young men in sub-Saharan Africa. This study aims to investigate the relationship between depression, suicidal thoughts and intimate partner violence perpetration, among young men in Tanzania from a representative community-based sample.We conducted a cross sectional survey among 1002 young men aged between 18 and 24 years residing in Mwanza city, Tanzania. Participants were randomly selected from 6 wards that included 3 densely and 3 sparsely populated wards from the Ilemela and Nyamagana districts that were selected using a probability-based multi-stage cluster sampling approach. We collected data on participant’s socio-demographics, depression symptoms using the PHQ9, suicidal thoughts, other psychosocial factors, and perpetration of different forms of intimate partner violence. Analysis was done using Stata version 17.0 and restricted to 828 participants who self-reported being in intimate relationships in the past twelve months. Bivariate and multivariable logistic regression models were employed to determine the association between the outcome variables with intimate partner violence perpetration and other psychosocial factors.Out of 828 young men, 333(40.2%) reported depressive symptoms and 93(11.9%) suicidal thoughts, with 725(87.6%) reporting ever perpetrating any form of intimate partner violence and 653(78.9%) reporting it in the past 12 months. After adjusting for other factors in multivariable models, depressive symptoms were significantly associated with sexual intimate partner violence perpetration (aOR = 2.19, 95%CI = 1.57, 3.04), economic intimate partner violence perpetration (aOR = 1.32 95%CI = 1.01, 1.74), emotional intimate partner violence perpetration (aOR = 1.76, 95%CI = 1.26, 2.46) and controlling behaviours (aOR = 1.46 95%CI = 1.10, 1.93).Depression is a common health problem strongly associated with intimate partner violence perpetration in this study population. Effective interventions to address depression and other mental health problems may help to reduce intimate partner violence perpetration in this population.Researchers and practitioners should develop theory-based research and intervention programmes to address mental health problems such as depression and suicidal thoughts and the perpetration of intimate partner violence. The socio-ecological framework provides an insightful model for multiple level analysis and intervention.Results: Depression and suicidal thoughts are associated with intimate partner violence, a major public health problem. Yet little is known about this association among young men in sub-Saharan Africa. This study aims to investigate the relationship between depression, suicidal thoughts and intimate partner violence perpetration, among young men in Tanzania from a representative community-based sample.We conducted a cross sectional survey among 1002 young men aged between 18 and 24 years residing in Mwanza city, Tanzania. Participants were randomly selected from 6 wards that included 3 densely and 3 sparsely populated wards from the Ilemela and Nyamagana districts that were selected using a probability-based multi-stage cluster sampling approach. We collected data on participant’s socio-demographics, depression symptoms using the PHQ9, suicidal thoughts, other psychosocial factors, and perpetration of different forms of intimate partner violence. Analysis was done using Stata version 17.0 and restricted to 828 participants who self-reported being in intimate relationships in the past twelve months. Bivariate and multivariable logistic regression models were employed to determine the association between the outcome variables with intimate partner violence perpetration and other psychosocial factors.Out of 828 young men, 333(40.2%) reported depressive symptoms and 93(11.9%) suicidal thoughts, with 725(87.6%) reporting ever perpetrating any form of intimate partner violence and 653(78.9%) reporting it in the past 12 months. After adjusting for other factors in multivariable models, depressive symptoms were significantly associated with sexual intimate partner violence perpetration (aOR = 2.19, 95%CI = 1.57, 3.04), economic intimate partner violence perpetration (aOR = 1.32 95%CI = 1.01, 1.74), emotional intimate partner violence perpetration (aOR = 1.76, 95%CI = 1.26, 2.46) and controlling behaviours (aOR = 1.46 95%CI = 1.10, 1.93).Depression is a common health problem strongly associated with intimate partner violence perpetration in this study population. Effective interventions to address depression and other mental health problems may help to reduce intimate partner violence perpetration in this population.Researchers and practitioners should develop theory-based research and intervention programmes to address mental health problems such as depression and suicidal thoughts and the perpetration of intimate partner violence. The socio-ecological framework provides an insightful model for multiple level analysis and intervention.Conclusions: Depression and suicidal thoughts are associated with intimate partner violence, a major public health problem. Yet little is known about this association among young men in sub-Saharan Africa. This study aims to investigate the relationship between depression, suicidal thoughts and intimate partner violence perpetration, among young men in Tanzania from a representative community-based sample.We conducted a cross sectional survey among 1002 young men aged between 18 and 24 years residing in Mwanza city, Tanzania. Participants were randomly selected from 6 wards that included 3 densely and 3 sparsely populated wards from the Ilemela and Nyamagana districts that were selected using a probability-based multi-stage cluster sampling approach. We collected data on participant’s socio-demographics, depression symptoms using the PHQ9, suicidal thoughts, other psychosocial factors, and perpetration of different forms of intimate partner violence. Analysis was done using Stata version 17.0 and restricted to 828 participants who self-reported being in intimate relationships in the past twelve months. Bivariate and multivariable logistic regression models were employed to determine the association between the outcome variables with intimate partner violence perpetration and other psychosocial factors.Out of 828 young men, 333(40.2%) reported depressive symptoms and 93(11.9%) suicidal thoughts, with 725(87.6%) reporting ever perpetrating any form of intimate partner violence and 653(78.9%) reporting it in the past 12 months. After adjusting for other factors in multivariable models, depressive symptoms were significantly associated with sexual intimate partner violence perpetration (aOR = 2.19, 95%CI = 1.57, 3.04), economic intimate partner violence perpetration (aOR = 1.32 95%CI = 1.01, 1.74), emotional intimate partner violence perpetration (aOR = 1.76, 95%CI = 1.26, 2.46) and controlling behaviours (aOR = 1.46 95%CI = 1.10, 1.93).Depression is a common health problem strongly associated with intimate partner violence perpetration in this study population. Effective interventions to address depression and other mental health problems may help to reduce intimate partner violence perpetration in this population.Researchers and practitioners should develop theory-based research and intervention programmes to address mental health problems such as depression and suicidal thoughts and the perpetration of intimate partner violence. The socio-ecological framework provides an insightful model for multiple level analysis and intervention.Implications: Depression and suicidal thoughts are associated with intimate partner violence, a major public health problem. Yet little is known about this association among young men in sub-Saharan Africa. This study aims to investigate the relationship between depression, suicidal thoughts and intimate partner violence perpetration, among young men in Tanzania from a representative community-based sample.We conducted a cross sectional survey among 1002 young men aged between 18 and 24 years residing in Mwanza city, Tanzania. Participants were randomly selected from 6 wards that included 3 densely and 3 sparsely populated wards from the Ilemela and Nyamagana districts that were selected using a probability-based multi-stage cluster sampling approach. We collected data on participant’s socio-demographics, depression symptoms using the PHQ9, suicidal thoughts, other psychosocial factors, and perpetration of different forms of intimate partner violence. Analysis was done using Stata version 17.0 and restricted to 828 participants who self-reported being in intimate relationships in the past twelve months. Bivariate and multivariable logistic regression models were employed to determine the association between the outcome variables with intimate partner violence perpetration and other psychosocial factors.Out of 828 young men, 333(40.2%) reported depressive symptoms and 93(11.9%) suicidal thoughts, with 725(87.6%) reporting ever perpetrating any form of intimate partner violence and 653(78.9%) reporting it in the past 12 months. After adjusting for other factors in multivariable models, depressive symptoms were significantly associated with sexual intimate partner violence perpetration (aOR = 2.19, 95%CI = 1.57, 3.04), economic intimate partner violence perpetration (aOR = 1.32 95%CI = 1.01, 1.74), emotional intimate partner violence perpetration (aOR = 1.76, 95%CI = 1.26, 2.46) and controlling behaviours (aOR = 1.46 95%CI = 1.10, 1.93).Depression is a common health problem strongly associated with intimate partner violence perpetration in this study population. Effective interventions to address depression and other mental health problems may help to reduce intimate partner violence perpetration in this population.Researchers and practitioners should develop theory-based research and intervention programmes to address mental health problems such as depression and suicidal thoughts and the perpetration of intimate partner violence. The socio-ecological framework provides an insightful model for multiple level analysis and intervention. [ABSTRACT FROM AUTHOR]

Background: Long-lasting insecticidal nets (LLINs) have successfully reduced malaria in sub-Saharan Africa, but their effectiveness is now partly compromised by widespread resistance to insecticides among vectors. We evaluated new classes of LLINs with two active ingredients with differing modes of action against resistant malaria vectors.Methods: We did a four-arm, cluster-randomised trial in Misungwi, Tanzania. Clusters were villages, or groups of hamlets, with at least 119 households containing children aged 6 months to 14 years living in the cluster's core area. Constrained randomisation was used to allocate clusters (1:1:1:1) to receive one of four types of LLIN treated with the following: α-cypermethrin only (pyrethroid-only [reference] group); pyriproxyfen and α-cypermethrin (pyriproxyfen group); chlorfenapyr and α-cypermethrin (chlorfenapyr group); or the synergist piperonyl butoxide and permethrin (piperonyl butoxide group). At least one LLIN was distributed for every two people. Community members and the field team were masked to group allocation. Malaria prevalence data were collected through cross-sectional surveys of randomly selected households from each cluster, in which children aged 6 months to 14 years were assessed for Plasmodium falciparum malaria infection by rapid diagnostic tests. The primary outcome was malaria infection prevalence at 24 months after LLIN distribution, comparing each of the dual-active-ingredient LLINs to the standard pyrethroid-only LLINs in the intention-to-treat population. The primary economic outcome was cost-effectiveness of dual-active-ingredient LLINs, based on incremental cost per disability-adjusted life-year (DALY) averted compared with pyrethroid-only LLINs, modelled over a 2-year period; we included costs of net procurement and malaria diagnosis and treatment, and estimated DALYs in all age groups. This study is registered with ClinicalTrials.gov (NCT03554616), and is ongoing but no longer recruiting.Findings: 84 clusters comprising 39 307 households were included in the study between May 11 and July 2, 2018. 147 230 LLINs were distributed among households between Jan 26 and Jan 28, 2019. Use of study LLINs was reported in 3155 (72·1%) of 4378 participants surveyed at 3 months post-distribution and decreased to 8694 (40·9%) of 21 246 at 24 months, with varying rates of decline between groups. Malaria infection prevalence at 24 months was 549 (45·8%) of 1199 children in the pyrethroid-only reference group, 472 (37·5%) of 1258 in the pyriproxyfen group (adjusted odds ratio 0·79 [95% CI 0·54-1·17], p=0·2354), 512 (40·7%) of 1259 in the piperonyl butoxide group (0·99 [0·67-1·45], p=0·9607), and 326 [25·6%] of 1272 in the chlorfenapyr group (0·45 [0·30-0·67], p=0·0001). Skin irritation or paraesthesia was the most commonly reported side-effect in all groups. Chlorfenapyr LLINs were the most cost-effective LLINs, costing only US$19 (95% uncertainty interval 1-105) more to public providers or $28 (11-120) more to donors per DALY averted over a 2-year period compared with pyrethroid-only LLINs, and saving costs from societal and household perspectives.Interpretation: After 2 years, chlorfenapyr LLINs provided significantly better protection than pyrethroid-only LLINs against malaria in an area with pyrethroid-resistant mosquitoes, and the additional cost of these nets would be considerably below plausible cost-effectiveness thresholds ($292-393 per DALY averted). Before scale-up of chlorfenapyr LLINs, resistance management strategies are needed to preserve their effectiveness. Poor textile and active ingredient durability in the piperonyl butoxide and pyriproxyfen LLINs might have contributed to their relative lack of effectiveness compared with standard LLINs.Funding: Joint Global Health Trials scheme (UK Foreign, Commonwealth and Development Office; UK Medical Research Council; Wellcome; UK Department of Health and Social Care), US Agency for International Development, President's Malaria Initiative. [ABSTRACT FROM AUTHOR]

Background: Sulphadoxine-pyrimethamine (SP) a widely used treatment for uncomplicated malaria and recommended for intermittent preventive treatment of malaria in pregnancy, is being investigated for intermittent preventive treatment of malaria in infants (IPTi). High levels of drug resistance to SP have been reported from north-eastern Tanzania associated with mutations in parasite genes. This study compared the in vivo efficacy of SP in symptomatic 6-59 month children with uncomplicated malaria and in asymptomatic 2-10 month old infants. Methodology and Principal Findings: An open label single arm (SP) standard 28 day in vivo WHO antimalarial efficacy protocol was used in 6 to 59 months old symptomatic children and a modified protocol used in 2 to 10 months old asymptomatic infants. Enrolment was stopped early (87 in the symptomatic and 25 in the asymptomatic studies) due to the high failure rate. Molecular markers were examined for recrudescence, re-infection and markers of drug resistance and a review of literature of studies looking for the 581G dhps mutation was carried out. In symptomatic children PCR-corrected early treatment failure was 38.8% (95% CI 26.8-50.8) and total failures by day 28 were 82.2% (95% CI 72.5-92.0). There was no significant difference in treatment failures between asymptomatic and symptomatic children. 96% of samples carried parasites with mutations at codons 51, 59 and 108 in the dhfr gene and 63% carried a double mutation at codons 437 and 540. 55% carried a third mutation with the addition of a mutation at codon 581 in the dhps gene. This triple: triple haplotype maybe associated with earlier treatment failure. Conclusion: In northern Tanzania SP is a failed drug for treatment and its utility for prophylaxis is doubtful. The study found a new combination of parasite mutations that maybe associated with increased and earlier failure. [ABSTRACT FROM AUTHOR]

Objectives: To quantify the burden of HIV, syphilis and schistosome infection and associated risk factors among adults living in seven fishing communities of Lake Victoria in northwest Tanzania. Methods: Cross‐sectional study conducted between 2015 and 2016 in the selected communities. In each community, we randomly selected a sample of adults from the general population and from three putative risk groups including the following: (i) fishermen, (ii) fish processors and traders, and (iii) women working in the recreational facilities. Participants were interviewed to obtain information about potential risk factors, and venous blood was collected for detection of HIV, syphilis and schistosome infections. We used logistic regression models to quantify the associations between potential risk factors and HIV, and also between schistosome infection and HIV. Results: We enrolled 1128 people from selected fishing communities. The overall prevalence of HIV, syphilis and schistosome infection was 14.2%, 15.6% and 83.1%, respectively. Female recreational facility workers had the highest prevalence of HIV (30.4%) and syphilis (24%). The odds of being HIV infected were generally higher in all age categories. Transactional sex was commonly reported and especially receiving gifts for sex was found to be strongly associated with HIV (adjusted OR = 2.50; 95% CI: 1.44–4.34, P = 0.008). Confirmed serological syphilis was associated with increased odds of having HIV infection. HIV was not associated with schistosome infection in a combined dataset and when we examined this separately for men and women alone. Conclusions: We observed a high burden of HIV, syphilis and schistosome infections in the fishing communities. Targeted efforts to treat and control infections have the potential to improve health among their residents. [ABSTRACT FROM AUTHOR]

Introduction: Globally, around 30% of ever-partnered women have experienced physical and/or sexual intimate partner violence (IPV) during their lifetime. To date, most research into causes and prevention of IPV involves surveys of women, with little research into risk-factors for male perpetration. This paper describes a survey of male partners of women participating in the MAISHA cluster randomised trial (CRT) of an IPV prevention intervention, in Mwanza City, Tanzania. Using linked couples' data, we explore man-, woman-, and relationship-/household-level factors associated with physical and sexual IPV. Methods: Women were interviewed at baseline and 29-months follow-up. At follow-up, women were asked for consent to invite their partner to participate in the male survey. We describe response rates for the women's follow-up and male partners' surveys, and identify factors associated with women's consent to approach partners. Multivariate logistic regression was used to explore factors associated with women's past-year experiences of physical and sexual IPV. Results: 512 (65%) partnered women consented for the partner to be approached, higher among intervention than control women. 425 (83%) male partners were interviewed. Women consenting were disproportionately likely to be in longer-term relationships. Past-year IPV was associated with lower consent among control women, but greater consent in the intervention arm. Factors associated with increased odds of physical IPV were women's childhood experiences of abuse, young age, women's lower income and women's attitudes justifying IPV. Sexual IPV was associated with women's childhood experiences of abuse, young age, educational disparity within couple, men's alcohol use and women's poor mental health. Conclusions: We successfully conducted a survey of male partners with the full consent of women trial participants. The breadth of factors associated with IPV demonstrates the need for IPV prevention interventions to work with women and men, and specifically couples. Interventions should address risk-factors for both physical and sexual IPV. [ABSTRACT FROM AUTHOR]

Background: Intimate partner violence (IPV) is recognised as an important public health and social problem, with far reaching consequences for women's physical and emotional health and social well-being. Furthermore, controlling behaviour by a partner has a similar impact on women's well-being, yet little is known about the prevalence of this type of behaviour and other related abuses in Tanzania and in other sub-Saharan African countries.Methods: We conducted a cross-sectional study to determine the lifetime and past 12-month prevalence of physical and sexual IPV, economic abuse, emotional abuse and controlling behaviour among ever-partnered women in Mwanza, Tanzania. Women (N = 1049) were enrolled in an ongoing trial (Maisha study) to assess the impact of microfinance combined with gender training on participants' experience IPV, and other related outcomes. Interviews were conducted by same sex interviewers to collect information about socio-demographic characteristics, experiences of specific acts of IPV and abuse, and symptoms of poor mental health status.Results: Overall, about 61% of women reported ever experiencing physical and/or sexual IPV (95% CI: 58-64%) and 27% (95% CI: 24-29%) experienced it in the past 12 months. Partner controlling behaviour was the most prevalent type of abuse with 82% experiencing it in their lifetime and 63% during the past 12 months. Other types of abuses were also common, with 34% of women reporting economic abuse and 39% reporting emotional abuse during the past 12 months. The prevalence of IPV and abuses varied by socio-demographic characteristics, showing much higher prevalence rates among younger women, women with young partners and less educated women. After we adjusted for age and socio-economic status, physical violence (OR = 1.8; 95% CI: 1.3-2.7) and sexual violence (OR = 2.8; 95% CI: 1.9-4.1) were associated with increased reporting of symptoms of poor mental health. Similarly, experience of abuse during the past 12 months was associated with increased reporting of symptoms of poor mental health.Conclusions: The high prevalence of IPV and abuses and its strong links with symptoms of poor mental health underline the urgent need for developing and testing appropriate interventions in settings like Tanzania to tackle both violence and abusive behaviours among intimate partners.Trial Registration: ClinicalTrials.gov - ID NCT02592252 , registered retrospectively on 13 August 2015. [ABSTRACT FROM AUTHOR]

Background: Chlorproguanil-dapsone (CD) has been linked to hemolysis in symptomatic glucose-6-phosphate dehydrogenase deficient (G6PDd) children. Few studies have explored the effects of G6PD status on hemolysis in children treated with Intermittent Preventive Treatment in infants (IPTi) antimalarial regimens. We sought to examine the joint effects of G6PD status and IPTi antimalarial treatment on incidence of hemolysis in asymptomatic children treated with CD, sulfadoxine-pyrimethamine (SP), and mefloquine (MQ). Methods: A secondary analysis of data from a double-blind, placebo-controlled trial of IPTi was conducted. Hemoglobin (Hb) measurements were made at IPTi doses, regular follow-up and emergency visits. G6PD genotype was determined at 9 months looking for SNPs for the A- genotype at coding position 202. Multivariable linear and logistic regression models were used to examine hemolysis among children with valid G6PD genotyping results. Hemolysis was defined as the absolute change in Hb or as any post-dose Hb <8 g/dL. These outcomes were assessed using either a single follow-up Hb on day 7 after an IPTi dose or Hb obtained 1 to 14 or 28 days after each IPTi dose. Findings: Relative to placebo, CD reduced Hb by approximately 0.5 g/dL at day 7 and within 14 days of an IPTi dose, and by 0.2 g/dL within 28 days. Adjusted declines in the CD group were larger than in the MQ and SP groups. At day 7, homo-/hemizygous genotype was associated with higher odds of Hb <8 g/dL (adjusted odds ratio = 6.7, 95% CI 1.7 to 27.0) and greater absolute reductions in Hb (-0.6 g/dL, 95% CI -1.1 to 0.003). There was no evidence to suggest increased reductions in Hb among homo-/hemizygous children treated with CD compared to placebo, SP or MQ. Conclusions: While treatment with CD demonstrated greater reductions in Hb at 7 and 14 days after an IPTi dose compared to both SP and MQ, there was no evidence that G6PD deficiency exacerbated the adverse effects of CD, despite evidence for higher hemolysis risk among G6PDd infants. [ABSTRACT FROM AUTHOR]

Background: Curable, non-viral pathogens account for a significant burden of sexually transmitted infections (STIs), and there is established evidence that STIs increase both HIV acquisition and transmission. We investigated the prevalence, trends, and factors associated with Chlamydia trachomatis, Neisseria gonorrhoeae, Trichomonas vaginalis and Treponema pallidum, and the performance of syndromic management, among a cohort of women working in bars, hotels, and other food and recreational facilities near large-scale mines in northwestern Tanzania. Methods: HIV-negative women aged 18–44 years (N = 966) were enrolled and followed for 12 months in a microbicides feasibility study. We collected sociodemographic and behavioural data, performed clinical examinations, and tested for STIs, at enrolment and 3-monthly. Risk factors for STIs were investigated using logistic regression models with random effects. Sensitivity, specificity and predictive values of syndromic management were calculated. Results: At enrolment, the prevalences of C. trachomatis, N. gonorrhoeae, T. vaginalis, and high-titre active syphilis were 111/956 (12%), 42/955 (4%), 184/945 (19%) and 46/965 (5%), respectively. There were significant decreases over time for C. trachomatis and T. vaginalis (OR trend per month: 0.94 [95% CI 0.91, 0.97]; and 0.95 [0.93, 0.98], respectively; both p<0.001). The majority of these infections were not diagnosed by the corresponding syndrome; therefore, most participants were not treated at the diagnosis visit. Syndromic management was poorly predictive of laboratory-diagnosed infections. We identified a number of risk factors for STIs, including low educational level, some sexual behaviours, and ever having been pregnant. Conclusions: This analysis demonstrates that the prevalences of curable STIs are high among women who work in food and recreational facilities in northwestern Tanzania. Most of these infections are missed by syndromic management. Accurate and affordable rapid-point-of-care tests and innovative interventions are needed to reduce the burden of STIs in this population which is at increased risk for HIV. [ABSTRACT FROM AUTHOR]

Background: Several studies conducted in Northeast Tanzania have documented declines in malaria transmission even before interventions were scaled up. One explanation for these reductions may be the changes in socio-environmental conditions associated with economic development, and in particular improvements in housing construction. Objective: This analysis seeks to identify (1) risk factors for malaria incidence among young children and (2) household and environmental factors associated with mosquito vector numbers collected in the child’s sleeping area. Both analyses focus on housing construction quality as a key determinant. Methodology: For 435 children enrolled in a larger trial of intermittent preventive treatment for malaria in infants in the Korogwe District in Tanga, Northeastern Tanzania, detailed information on their dwelling characteristics were collected in the last year of the trial. Principal components analysis was used to construct an index of housing structure quality and converted to quintile units for regression analysis. Univariate and multivariate random effects negative binomial regressions were used to predict risk factors for child malaria incidence and the mean total number of indoor female Anopheles gambiae and funestus mosquitoes collected per household across three occasions. Findings: Building materials have substantially improved in Korogwe over time. Multivariate regressions showed that residing in rural areas (versus urban) increased malaria incidence rates by over three-fold and mean indoor female A. gambiae and funestus numbers by nearly two-fold. Compared to those residing in the lowest quality houses, children residing in the highest quality houses had one-third lower malaria incidence rates, even when wealth and rural residence were controlled for. Living in the highest quality houses reduced vector numbers while having cattle near the house significantly increased them. Conclusions: Results corroborate findings from other studies that show associations between malaria incidence and housing quality; associations were concentrated amongst the highest quality houses. [ABSTRACT FROM AUTHOR]

Objectives: To prepare for future HIV prevention trials, we conducted prospective cohort studies among women working in food and recreational facilities in northern Tanzania. We examined the prevalence and incidence of HIV and HSV-2, and associated risk factors. Methods: Women aged 18–44 years working in food and recreational facilities were screened to determine their eligibility for the studies. Between 2008–2010, HIV-negative women were enrolled and followed for 12 months. At enrolment and 3-monthly, we collected socio-demographic and behavioural data, and performed clinical examinations for collection of biological specimens that were tested for reproductive tract infections. Risk factors for HIV and HSV-2 incidence were investigated using Poisson regression models. Results: We screened 2,229 and enrolled 1,378 women. The median age was 27 years (interquartile range, IQR 22, 33), and median duration working at current facility was 2 years. The prevalences of HIV at screening and HSV-2 at enrolment were 16% and 67%, respectively. Attendance at the 12-month visit was 86%. HIV and HSV-2 incidence rates were 3.7 (95% confidence interval, CI: 2.8,5.1) and 28.6 (95% CI: 23.5,35.0)/100 person-years, respectively. Women who were separated, divorced, or widowed were at increased risk of HIV (adjusted incidence rate ratio, aRR = 6.63; 95% CI: 1.97,22.2) and HSV-2 (aRR = 2.00; 95% CI: 1.15,3.47) compared with married women. Women reporting ≥3 partners in the past 3 months were at higher HIV risk compared with women with 0–1 partner (aRR = 4.75; 95% CI: 2.10,10.8), while those who had reached secondary education or above were at lower risk of HSV-2 compared with women with incomplete primary education (aRR = 0.42; 95% CI: 0.22,0.82). Conclusions: HIV and HSV-2 rates remain substantially higher in this cohort than in the general population, indicating urgent need for effective interventions. These studies demonstrate the feasibility of conducting trials to test new interventions in this highly-mobile population. [ABSTRACT FROM AUTHOR]

Background: The gold standard for diagnosis of typhoid fever is blood culture (BC). Because blood culture is often not available in impoverished settings it would be helpful to have alternative diagnostic approaches. We therefore investigated the usefulness of clinical signs, WHO case definition and Widal test for the diagnosis of typhoid fever. Methodology/Principal Findings: Participants with a body temperature ⩾37.5°C or a history of fever were enrolled over 17 to 22 months in three hospitals on Pemba Island, Tanzania. Clinical signs and symptoms of participants upon presentation as well as blood and serum for BC and Widal testing were collected. Clinical signs and symptoms of typhoid fever cases were compared to other cases of invasive bacterial diseases and BC negative participants. The relationship of typhoid fever cases with rainfall, temperature, and religious festivals was explored. The performance of the WHO case definitions for suspected and probable typhoid fever and a local cut off titre for the Widal test was assessed. 79 of 2209 participants had invasive bacterial disease. 46 isolates were identified as typhoid fever. Apart from a longer duration of fever prior to admission clinical signs and symptoms were not significantly different among patients with typhoid fever than from other febrile patients. We did not detect any significant seasonal patterns nor correlation with rainfall or festivals. The sensitivity and specificity of the WHO case definition for suspected and probable typhoid fever were 82.6% and 41.3% and 36.3 and 99.7% respectively. Sensitivity and specificity of the Widal test was 47.8% and 99.4 both forfor O-agglutinin and H- agglutinin at a cut-off titre of 1:80. Conclusions/Significance: Typhoid fever prevalence rates on Pemba are high and its clinical signs and symptoms are nonspecific. The sensitivity of the Widal test is low and the WHO case definition performed better than the Widal test. [ABSTRACT FROM AUTHOR]

Summary: Background: Zanzibar, in east Africa, has been severely and repeatedly affected by cholera since 1978. We assessed the effectiveness of oral cholera vaccination in high-risk populations in the archipelago to estimate the indirect (herd) protection conferred by the vaccine and direct vaccine effectiveness. Methods: We offered two doses of a killed whole-cell B-subunit cholera vaccine to individuals aged 2 years and older in six rural and urban sites. To estimate vaccine direct protection, we compared the incidence of cholera between recipients and non-recipients using generalised estimating equations with the log link function while controlling for potential confounding variables. To estimate indirect effects, we used a geographic information systems approach and assessed the association between neighbourhood-level vaccine coverage and the risk for cholera in the non-vaccinated residents of that neighbourhood, after controlling for potential confounding variables. This study is registered with ClinicalTrials.gov, number NCT00709410. Findings: Of 48 178 individuals eligible to receive the vaccine, 23 921 (50%) received two doses. Between February, 2009, and May, 2010, there was an outbreak of cholera, enabling us to assess vaccine effectiveness. The vaccine conferred 79% (95% CI 47–92) direct protection against cholera in participants who received two doses. Indirect (herd) protection was shown by a decrease in the risk for cholera of non-vaccinated residents within a household''s neighbourhood as the vaccine coverage in that neighbourhood increased. Interpretation: Our findings suggest that the oral cholera vaccine offers both direct and indirect (herd) protection in a sub-Saharan African setting. Mass oral cholera immunisation campaigns have the potential to provide not only protection for vaccinated individuals but also for the unvaccinated members of the community and should be strongly considered for wider use. Because this is an internationally-licensed vaccine, we could not undertake a randomised placebo-controlled trial, but the absence of vaccine effectiveness against non-cholera diarrhoea indicates that the noted protection against cholera could not be explained by bias. Funding: Bill & Melinda Gates Foundation, Swedish International Development Cooperation Agency, and the South Korean Government. [Copyright &y& Elsevier]

Background: The gold standard for the diagnosis of cholera is stool culture, but this requires laboratory facilities and takes at least 24 hours. A rapid diagnostic test (RDT) that can be used by minimally trained staff at treatment centers could potentially improve the reporting and management of cholera outbreaks. Methods: We evaluated the Crystal VC™ RDT under field conditions in Zanzibar in 2009. Patients presenting to treatment centers with watery diarrhea provided a stool sample for rapid diagnostic testing. Results were compared to stool culture performed in a reference laboratory. We assessed the overall performance of the RDT and evaluated whether previous intake of antibiotics, intravenous fluids, location of testing, and skill level of the technician affected the RDT results. Results: We included stool samples from 624 patients. Compared to culture, the overall sensitivity of the RDT was 93.1% (95%CI: 88.7 to 96.2%), specificity was 49.2% (95%CI: 44.3 to 54.1%), the positive predictive value was 47.0% (95%CI: 42.1 to 52.0%) and the negative predictive value was 93.6% (95%CI: 89.6 to 96.5%). The overall false positivity rate was 50.8% (213/ 419); fieldworkers frequently misread very faint test lines as positive. Conclusion: The observed sensitivity of the Crystal VC RDT evaluated was similar compared to earlier versions, while specificity was poorer. The current version of the RDT could potentially be used as a screening tool in the field. Because of the high proportion of false positive results when field workers test stool specimens, positive results will need to be confirmed with stool culture. [ABSTRACT FROM AUTHOR]

Background: We conducted a surveillance study to determine the leading causes of bloodstream infection in febrile patients seeking treatment at three district hospitals in Pemba Island, Zanzibar, Tanzania, an area with low malaria transmission. Methods: All patients above two months of age presenting to hospital with fever were screened, and blood was collected for microbiologic culture and malaria testing. Bacterial sepsis and malaria crude incidence rates were calculated for a oneyear period and were adjusted for study participation and diagnostic sensitivity of blood culture. Results: Blood culture was performed on 2,209 patients. Among them, 166 (8%) samples yielded bacterial growth; 87 (4%) were considered as likely contaminants; and 79 (4%) as pathogenic bacteria. The most frequent pathogenic bacteria isolated were Salmonella Typhi (n = 46; 58%), followed by Streptococcus pneumoniae (n = 12; 15%). The crude bacteremia rate was 6/ 100,000 but when adjusted for potentially missed cases the rate may be as high as 163/100,000. Crude and adjusted rates for S. Typhi infections and malaria were 4 and 110/100,000 and 4 and 47/100,000, respectively. Twenty three (51%), 22 (49%) and 22 (49%) of the S.Typhi isolates were found to be resistant toward ampicillin, chloramphenicol and cotrimoxazole, respectively. Multidrug resistance (MDR) against the three antimicrobials was detected in 42% of the isolates. Conclusions: In the presence of very low malaria incidence we found high rates of S. Typhi and S. pneumoniae infections on Pemba Island, Zanzibar. Preventive measures such as vaccination could reduce the febrile disease burden [ABSTRACT FROM AUTHOR]

Background. Variation in the risk of malaria within populations is a frequently described but poorly understood phenomenon. This heterogeneity creates opportunities for targeted interventions but only if hot spots of malaria transmission can be easily identified. Methods. We determined spatial patterns in malaria transmission in a district in northeastern Tanzania, using malaria incidence data from a cohort study involving infants and household-level mosquito sampling data. The parasite prevalence rates and age-specific seroconversion rates (SCRs) of antibodies against Plasmodium falciparum antigens were determined in samples obtained from people attending health care facilities. Results. Five clusters of higher malaria incidence were detected and interpreted as hot spots of transmission. These hot spots partially overlapped with clusters of higher mosquito exposure but could not be satisfactorily predicted by a probability model based on environmental factors. Small-scale local variation in malaria exposure was detected by parasite prevalence rates and SCR estimates for samples of health care facility attendees. SCR estimates were strongly associated with local malaria incidence rates and predicted hot spots of malaria transmission with 95% sensitivity and 85% specificity. Conclusions. Serological markers were able to detect spatial variation in malaria transmission at the microepidemiological level, and they have the potential to form an effective method for spatial targeting of malaria control efforts. [ABSTRACT FROM AUTHOR]

Background: Intermittent preventive treatment in infants (IPTi) is a new malaria control tool. However, it is uncertain whether IPTi works mainly through chemoprophylaxis or treatment of existing infections. Understanding the mechanism is essential for development of replacements for sulfadoxine-pyrimethamine (SP) where it is no longer effective. This study investigated how protection against malaria given by SP, chlorproguanil-dapsone (CD) and mefloquine (MQ), varied with time since administration of IPTi. Methods and Findings: A secondary analysis of data from a randomised, placebo-controlled trial in an area of high antifolate resistance in Tanzania was conducted. IPTi using SP, CD, MQ or placebo was given to 1280 infants at 2, 3 and 9 months of age. Poisson regression with random effects to adjust for potential clustering of malaria episodes within children was used to calculate incidence rate ratios for clinical malaria in defined time strata following IPTi. The short-acting antimalarial CD gave no protection against clinical malaria, whereas long-acting MQ gave two months of substantial protection (protective efficacy (PE) 73.1% (95% CI: 23.9, 90.5) and 73.3% (95% CI: 0, 92.9) in the first and second month respectively). SP gave some protection in the first month after treatment (PE 64.5% (95% CI: 10.6, 85.9)) although it did not reduce the incidence of malaria up to 12 months of age. There was no evidence of either long-term protection or increased risk of malaria for any of the regimens. Conclusion: Post-treatment chemoprophylaxis appears to be the main mechanism by which IPTi protects children against malaria. Long-acting antimalarials are therefore likely to be the most effective drugs for IPTi, but as monotherapies could be vulnerable to development of drug resistance. Due to concerns about tolerability, the mefloquine formulation used in this study is not suitable for IPTi. Further investigation of combinations of long-acting antimalarials for IPTi is needed. Trial Registration: Clinicaltrials.gov NCT00158574 [ABSTRACT FROM AUTHOR]

The article discusses a study which examined the efficacy of sulfadoxine-pyrimethamine, mefloquine and chlorproguanil-dapsone as alternative drugs for intermittent preventive treatment in infants (IPTi) against malaria in an area of high sulfadoxine-pyrimethamine resistance in northeast Tanzania. The double-blind, placebo-controlled trial, randomly assigned infants aged 8 to 16 weeks to either receive a combination of sulfadoxine and pyrimethamine, a combination of chlorproguanil and dapsone, mefloquine, or placebo. Main variable measured was protective efficacy against all episodes of clinical malaria at 2 to 11 months of age. Also detailed is an interpretation of the research findings.

In sub-Saharan Africa (SSA), hospitalized HIV-infected patients who are discharged home have been shown to experience extremely high mortality rate. Daraja is an individual-level, time-limited, five-session case management intervention aiming to link hospitalized HIV-infected patients to outpatient HIV care upon discharge. A randomized control trial will aim at evaluating the efficacy of Daraja intervention on reducing mortality in hospitalized HIV-infected patients upon discharge from hospital. The study will recruit 500 hospitalized HIV-infected adults who are ART naïve or defaulted for >7 days from hospitals in Mwanza region, Tanzania. Participants will be enrolled during hospitalization and a baseline assessment will be done. Participants will be randomized to receive either the standard of care HIV linkage, or the Daraja intervention a day before the expected hospital discharge date. The Daraja intervention includes five sessions delivered by a social worker over a 3-month period. All participants will complete follow-up assessment at month 12 and 24. Measures will include 1-year survival, HIV care continuum outcomes (linkage, retention, antiretroviral adherence, and viral suppression), and cost (incremental cost of the intervention and cost per life saved). Quality assurance data will be collected, and the feasibility and acceptability of the intervention will be described. Statistical analysis will assess the effectiveness of the Daraja intervention on improving survival and HIV care continuum outcomes. Hospitalized HIV-infected patients who are being discharged home have higher mortality due to poor linkage to primary HIV care. The Daraja intervention has the potential to address barriers that prevent successful transition from hospital to primary HIV care. Trial registration : ClinicalTrials.gov , NCT03858998. Registered on 01 March 2019. [ABSTRACT FROM AUTHOR]