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Coxiella burnetii is a zoonotic intracellular bacterium that is widely distributed and affects domestic animals, wildlife, humans and non-mammalian species. This systematic review was aimed at synthesizing research findings on C. burnetii in both domestic and wild animals of South Africa. The systematic review protocol was registered with Open Society Foundations of systematic reviews (https://doi.org/10.17605/OSF.IO/8WS). PRISMA guidelines were followed to collect and evaluate relevant scientific articles published on C. burnetii infecting domestic and wild animals in South Africa. Published articles were sourced from five electronic databases, namely, Google Scholar, PubMed and ScienceDirect, EBSCO and Scopus. Results showed 11 eligible studies involving four domestic animals, three wild animals and one ectoparasite species from seven provinces across South Africa. The occurrence of C. burnetii infection was high in Ceratotherium simum (white rhinoceros) (53.9%), medium in sheep (29.0%) and low in pigs (0.9%). Limpopo province (26%) had the most recorded infections followed by KwaZulu-Natal (19%) and Free State (3%) had the least reported occurrence of C. burnetii. The current study discovered that there is scarcity of published research on prevalence and distribution of C. burnetii infecting domestic and wild animals in South Africa, and this is of concern as this bacterium is an important zoonotic pathogen of "One Health" importance. [ABSTRACT FROM AUTHOR]

Background: Pregnant and parenting adolescent girls are at risk of poor mental health because of stigma and social exclusion. Despite one in four girls starting childbearing by the age of 19 in Africa, no study, to the best of our knowledge, has examined the multi-layered factors (individual, family, friends, and neighborhood-related factors) associated with depressive symptoms among pregnant and parenting girls in Africa. Our study contributes to addressing this gap by examining the socio-ecological factors associated with depression symptoms among pregnant and parenting adolescent girls. Methods: Our study adopted a cross-sectional design. Between March and September 2021, we interviewed 980 pregnant and parenting adolescent girls in Ouagadougou, Burkina Faso, and 669 in Blantyre, Malawi. We recruited pregnant and parenting adolescent girls in randomly selected urban and rural enumeration areas in Burkina Faso (n = 71) and Malawi (n = 66). We assessed depressive symptoms using the Patient Health Questionnaire (PHQ-9), which generated an overall score of 27. We considered a score of 10 or more as probable depression. We also obtained information on individual, family, friends, and neighborhood characteristics. We employed logistic regression models to examine the significant factors associated with probable depression among pregnant and parenting adolescent girls. Results: The prevalence of probable depression was 18.8% and 14.5% in Burkina Faso and Malawi, respectively. At the individual level, having secondary education was significantly associated with a lower likelihood of probable depression in Malawi (AOR: 0.47; 95% CI 0.27–0.82) but not in Burkina Faso. At the family level, denying paternity (AOR: 3.14; 95% CI 1.34–7.11 in Malawi) and no parental support (AOR: 2.08; 95% CI 1.22–3.55 in Burkina Faso) were associated with higher odds of probable depression. At the community level, perceived neighborhood safety was associated with a lower likelihood of probable depression in Malawi (AOR: 0.74; 95% CI 0.61–0.89) and Burkina Faso (AOR: 0.81; 95% CI 0.73–0.90). Having a safety net within the community was associated with lower odds of probable depression in Burkina Faso (AOR: 0.87; 95% CI 0.78–0.96) but not in Malawi. Conclusion: Depressive symptoms are common among pregnant and parenting adolescents, suggesting the need to screen them regularly for depression during antenatal and postnatal visits. Factors associated with depression among pregnant and parenting girls operate at multiple levels suggesting a need for multilevel interventions that address all areas of vulnerabilities. Plain English Summary: Pregnant and parenting adolescents are at a higher risk of poor mental health. If unaddressed or untreated, the consequences may be dire throughout an individual's life. About one in four girls start childbearing before their 19th birthday in Africa. Most of these pregnancies are unintended or unplanned and occur outside wedlock, bringing untoward disruption to every facet of the girl's life. The burden of early parenthood and the stigma of starting childbearing too early and outside wedlock can affect the mental wellness of girls. Yet only a few studies have focused on understanding the burden and drivers of poor mental health among pregnant and parenting girls. Our study contributes to the research on depression among pregnant and parenting girls, highlighting its burden and individual, family, and community drivers. We conducted this study in Ouagadougou, Burkina Faso, and Blantyre, Malawi, between March and September 2021. A total of 980 and 669 pregnant and parenting girls were recruited into this study in Burkina and Malawi. Our analysis shows that 18.8% and 14.5% of pregnant and parenting girls in Burkina Faso and Malawi, respectively, had probable depression. Depression symptoms was higher when girls were older than 17 years, suffered violence from their partners, their partners denied paternity, received no support from their partners and parents, lived in violent neighborhoods, and had no support system in the community. We conclude that depression is high among pregnant and parenting girls. It necessitates screening them for depression during antenatal and postnatal care visits. To effectively address depression among these girls, interventions must canvass support at the family and community levels. [ABSTRACT FROM AUTHOR]

Background: In Cambodia, female entertainment workers (FEWs) are disproportionately affected by global and local disasters, such as the COVID-19 pandemic. To prevent the spread of COVID-19, the government imposed tight restrictions, including closures of entertainment venues, such as karaoke bars, beer gardens, nightclubs, or massage parlors, leading FEWs to face economic and social disruptions. This study aims to assess the relationship between income loss during the pandemic and gender-based violence (GBV) among FEWs in Cambodia to inform future disaster response programs. Methods: We conducted a phone survey in August 2021 with 369 randomly sampled FEWs from a national organization's email list. We used a structured questionnaire to ask the participants about job and income loss, food security, mental health, access to health services, and GBV. We fit a linear regression model to examine the differences in GBV experience between FEWs who lost all their income and those who lost partial income due to the COVID-19 pandemic. Key covariables comprised the number of dependents, smartphone ownership, internet access, food security, and mental health. Multivariable linear regression analysis was conducted. Results: The mean age (31.6 vs. 30.6), years of formal education (6.3 vs. 6.3), marital status (24.2 vs. 23.8 never married), and the number of children (1.3 vs. 1.1) of women reporting having lost all income were not significantly different from those who experienced partial income loss. Overall, GBV experiences were significantly higher in FEWs who lost all income than in those who lost partial income (62.9% vs. 47.4%, p = 0.03). Controlling for the number of dependents, smartphone ownership, and food security, the adjusted odds ratio for GBV was significant in the adjusted model (AOR = 1.23 (1.08–1.40), p = 0.001) indicating that those who experienced total income loss were more likely to experience GBV than those who experienced partial income loss. In addition, they were significantly less likely to be food secure (p = 0.04), less likely to own a smartphone (p = 0.02), and had more dependents (p < 0.001). Conclusion: Disaster response programs should consider the implications of safety measures and government support for both formal and informal workers regarding safety, food access, and mental health support. Food assistance programs should target the most vulnerable informal sector workers during crises. [ABSTRACT FROM AUTHOR]

Objectives: STIs cause inflammation that is detrimental for both HIV risk and reproductive health. We assessed the impact of point-of-care (POC) STI testing, immediate treatment and expedited partner therapy (EPT) on genital tract cytokines among a cohort of young South African women.Methods: HIV-negative women underwent POC testing for Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG) and Trichomonas vaginalis (TV) by Xpert CT/NG and OSOM TV, and for bacterial vaginosis (BV) by microscopy. Women with STIs and/or BV received immediate treatment, EPT for STIs and retested after 6 and 12 weeks. Concentrations of 48 cytokines were measured in cervicovaginal fluid at each visit using multiplex ELISA technology. The impact of STI treatment on cytokine concentrations was assessed by multivariable linear mixed models and principal component analysis.Results: The study enrolled 251 women with median age of 23 years (IQR 21-27). The prevalence of CT, NG and TV were 14.3%, 4.4% and 4.0%, and 34.3% had BV. Women with STIs or BV at baseline (n=94) had significantly higher concentrations of pro-inflammatory cytokines (interleukin (IL)-1α, IL-1β, IL-6, tumour necrosis factor (TNF)-α, TNF-β, IL-18 and macrophage inflammatory factor (MIF)) and chemokines (IL-8, IL-16, macrophage inflammatory protein (MIP)-1α, IFN-α2, monokine induced by gamma interferon (MIG), monocyte chemoattractant protein (MCP)-3, regulated on activation normal T cell expressed and secreted and eotaxin) compared with women without (n=157). STI treatment was strongly associated with reduced concentrations of pro-inflammatory cytokines IL-6 (p=0.004), IL-1β (p=0.013), TNF-α (p=0.018) and chemokines MIG (p=0.008) and growth-related oncogene (GRO)-α (p=0.025). A lower Nugent score was associated with a reduction in pro-inflammatory cytokines IL-1α (p=0.003), TNF-related apoptosis-inducing ligand (p=0.004), MIF (p=0.010) and IL-18 (p<0.001), but an increase in chemokines MIG (p=0.020), GRO-α (p<0.001), IP-10 (p<0.001), MIP-1β (p=0.008) and MCP-1 (p=0.005). Principal component analysis showed differences in STI and BV-related inflammatory profiles, but that resolution restored a profile consistent with vaginal health.Conclusions: A comprehensive STI intervention effectively reduced genital inflammation among young women, thereby improving vaginal health and potentially reducing HIV risk. [ABSTRACT FROM AUTHOR]

Beyond the monopoly environment of the early 100% Condom Use Program in Cambodia, less is known about how current female entertainment workers negotiate condom use on their own, and what factors impact that negotiation. This study aims to understand the experiences of current female entertainment workers in negotiating condom use with clients in Cambodia. Data collection occurred over a period of 3 weeks (August-September 2017) with concurrent data transcription and translation. A total of 27 focus group discussions (FGDs) were conducted in the following groups: pilot FGD (5), karaoke bar (5), massage parlor (5), beer garden (5), on-call sex workers (3), cross-venue groups exploring parenting issues (2), and street-based sex workers (2). Female entertainment workers experience a range of control over negotiating condom use with clients. Participants reported times when they were able to take direct action and successfully insist on condom use, times when they agreed to participate in condomless sex for money in the face of economic insecurity, and times when male clients sabotaged their attempts to negotiate condom use with tricks, verbal threats or threats of violence. These experiences are influenced by alcohol use, economic shocks, trust between partners, and experiences with side effects. Our findings support the development of policies that re-invigorate the structural-level condom promotion programs while also acknowledging the many individual-level factors that shape condom use such as alcohol consumption, economic insecurity, trust, and side effects. [ABSTRACT FROM AUTHOR]

Amorphous and ferromagnetic Al–Ni nanofilms have been grown by the magnetron-sputtering method with some nanosized crystalline grains embedded therein. Resistivity is demonstrated to transit from a positive temperature coefficient to a negative temperature coefficient (NTC) with increasing the fraction of Ni atoms in the Al–Ni nanofilms. The lattice disorder is deduced to induce the Anderson localization of electrons and the formation of polarons so that the NTC of the resistivity is driven in the Al–Ni nanofilms, different from that in the elemental Al and Ni nanofilms. The electron transport in the Al–Ni nanofilms is dominated by polaron hopping while it is also determined by electron–magnon and electron–phonon scatterings. The electron–magnon scatterings are further revealed to have a more important contribution to the electron transport at low temperatures than electron–phonon scatterings in the amorphous Al–Ni nanofilms. A so-called polaron–metal physical model has thus been proposed to well explain the electron transport in disorder lattices with crystalline grains embedded therein. This study may help to optimize the design of nano-engineered devices. [ABSTRACT FROM AUTHOR]

Triacetone triperoxide (TATP) is a high explosive synthesized from easily available reactants making it accessible for illicit uses. In this study, fast detection of TATP is achieved using a novel planar solid-phase microextraction (PSPME) as a preconcentration and sampling device for headspace analysis offering improved sensitivity and reduced sampling time over the conventional fiber-based solid-phase microextraction (SPME) when followed by ion mobility spectrometer (IMS) detection. Quantitation and comparison of the retention capabilities of PSPME as compared to the commercially available SPME were determined using TATP standards and analyzed using gas chromatography-mass spectrometry for SPME analysis and a commercial IMS with no instrumental modification for PSPME. Static and dynamic headspace extractions were used and compared for PSPME extractions, in which low milligram quantities of TATP were detected within 30 s of static mode sampling and less than 5 s in the dynamic mode sampling for PSPME-IMS. [ABSTRACT FROM AUTHOR]