Spatial distribution and factors associated with HIV testing among adolescent girls and young women in Sierra Leone.

BACKGROUND: Sierra Leone faces a significant challenge in addressing HIV/AIDS, particularly among adolescent girls and young women. This age group is considered highly vulnerable due to biological factors and social inequalities. Understanding the prevalence of HIV testing in this demographic is crucial for designing effective prevention and treatment strategies. This study investigated the spatial distribution of HIV testing and its associated factors among adolescent girls and young women in Sierra Leone. METHODS: Data from the 2019 Sierra Leone Demographic and Health Survey was used for the study. The sample comprised 6,062 adolescent girls and young women between the ages of 15 and 24. Spatial autocorrelation and Moran's I statistic were employed to analyze the spatial distribution of HIV testing. An analysis utilising mixed-effect multilevel binary logistic regression was performed to determine the factors associated with HIV testing. The findings were presented as adjusted odds ratios (aOR) and a 95% confidence interval (CI). RESULTS: The national prevalence of HIV testing among adolescents and young women in Sierra Leone was 42.1% [40.3,43.9]. Kailahun, Kambia, Tonkolil, some parts of the Western rural area, and Bonthe districts were found to be statistically significant hotspot for HIV testing. Whereas, Karene, Falaba, Bo, kenema, and some parts of Pujuhun were statistically cold spot districts. Adolescent girls and young women aged 20-24 [aOR = 1.63, 95% CI = 1.29, 2.07] had higher odds of HIV testing than those aged 15-19. Those with secondary/higher education [aOR = 1.87, 95% CI = 1.40, 2.51] had higher odds of HIV testing than those with no education. The odds of HIV testing was higher among adolescent girls and young women who use the Internet [aOR = 1.75, 95% CI = 1.32, 2.33] than those who did not use internet. Adolescent girls and young women with one [aOR = 16.56, 95% CI = 12.31, 22.29] and two or more parity [aOR = 16.37, 95% CI = 10.86, 24.68] had higher odds of HIV testing than those with no parity. The likelihood of HIV testing was higher among adolescent girls and young women who had sex below 18 [aOR = 4.54, 95% CI = 3.25, 6.34] and those who had sex at 18+ [aOR = 5.70, 95% CI = 3.84, 8.45] compared to those who had never had sex. Adolescent girls and young women who visited health facilities in the past 12 months [aOR = 1.82, 95% CI = 1.46, 2.26] had higher odds of HIV testing than those who did not. CONCLUSION: Despite some positive trends, HIV testing rates among adolescent girls and young women in Sierra Leone remain moderate. Spatial autocorrelation analysis consistently revealed hotspots and cold spots for HIV testing, with Kailahun, Kambia, Tonkolil, some parts of the Western rural area, and Bonthe districts remaining persistent hotspots. Age, education, internet use, sexual history, parity, and healthcare access are significant factors influencing testing behaviour. To improve testing rates, the government and policymakers should prioritize educational campaigns, expand internet access, integrate HIV testing into routine healthcare, and address stigma associated with HIV.

Sosuga Virus Detected in Egyptian Rousette Bats (Rousettus aegyptiacus) in Sierra Leone.

Sosuga virus (SOSV), a rare human pathogenic paramyxovirus, was first discovered in 2012 when a person became ill after working in South Sudan and Uganda. During an ecological investigation, several species of bats were sampled and tested for SOSV RNA and only one species, the Egyptian rousette bat (ERBs; Rousettus aegyptiacus), tested positive. Since that time, multiple other species have been sampled and ERBs in Uganda have continued to be the only species of bat positive for SOSV infection. Subsequent studies of ERBs with SOSV demonstrated that ERBs are a competent host for SOSV and shed this infectious virus while exhibiting only minor infection-associated pathology. Following the 2014 Ebola outbreak in West Africa, surveillance efforts focused on discovering reservoirs for zoonotic pathogens resulted in the capture and testing of many bat species. Here, SOSV RNA was detected by qRT-PCR only in ERBs captured in the Moyamba District of Sierra Leone in the central region of the country. These findings represent a substantial range extension from East Africa to West Africa for SOSV, suggesting that this paramyxovirus may occur in ERB populations throughout its sub-Saharan African range.

Isolation of Angola-like Marburg virus from Egyptian rousette bats from West Africa.

Marburg virus (MARV) causes sporadic outbreaks of severe Marburg virus disease (MVD). Most MVD outbreaks originated in East Africa and field studies in East Africa, South Africa, Zambia, and Gabon identified the Egyptian rousette bat (ERB; Rousettus aegyptiacus) as a natural reservoir. However, the largest recorded MVD outbreak with the highest case-fatality ratio happened in 2005 in Angola, where direct spillover from bats was not  shown. Here, collaborative studies by the Centers for Disease Control and Prevention, Njala University, University of California, Davis USAID-PREDICT, and the University of Makeni identify MARV circulating in ERBs in Sierra Leone. PCR, antibody and virus isolation data from 1755 bats of 42 species shows active MARV infection in approximately 2.5% of ERBs. Phylogenetic analysis identifies MARVs that are similar to the Angola strain. These results provide evidence of MARV circulation in West Africa and demonstrate the value of pathogen surveillance to identify previously undetected threats.