Hot-spots of HIV infection in Cameroon: a spatial analysis based on Demographic and Health Surveys data.

BACKGROUND: The Human Immunodeficiency Virus(HIV) infection prevalence in Cameroon has decreased from [Formula: see text] in 2004 to [Formula: see text] in 2018. However, this decrease in prevalence does not show disparities especially in terms of spatial or geographical pattern. Efficient control and fight against HIV infection may require targeting hotspot areas. This study aims at presenting a cartography of HIV infection situation in Cameroon using the 2004, 2011 and 2018 Demographic and Health Survey data, and investigating whether there exist spatial patterns of the disease, may help to detect hot-spots. METHODS: HIV biomarkers data and Global Positioning System (GPS) location data were obtained from the Cameroon 2004, 2011, and 2018 Demographic and Health Survey (DHS) after an approved request from the MEASURES Demographic and Health Survey Program. HIV prevalence was estimated for each sampled area. The Moran's I (MI) test was used to assess spatial autocorrelation. Spatial interpolation was further performed to estimate the prevalence in all surface points. Hot-spots were identified based on Getis-Ord (Gi*) spatial statistics. Data analyses were done in the R software(version 4.1.2), while Arcgis Pro software tools' were used for all spatial analyses. RESULTS: Generally, spatial autocorrelation of HIV infection in Cameroon was observed across the three time periods of 2004 ([Formula: see text], [Formula: see text]), 2011 ([Formula: see text], [Formula: see text]) and 2018 ([Formula: see text], [Formula: see text]). Subdivisions in which one could find persistent hot-spots for at least two periods including the last period 2018 included: Mbéré, Lom et Djerem, Kadey, Boumba et Ngoko, Haute Sanaga, Nyong et Mfoumou, Nyong et So'o Haut Nyong, Dja et Lobo, Mvila, Vallée du Ntem, Océan, Nyong et Kellé, Sanaga Maritime, Menchum, Dounga Mantung, Boyo, Mezam and Momo. However, Faro et Déo emerged only in 2018 as a subdivision with HIV infection hot-spots. CONCLUSION: Despite the decrease in HIV epidemiology in Cameroon, this study has shown that there are spatial patterns for HIV infection in Cameroon and possible hot-spots have been identified. In its effort to eliminate HIV infection by 2030 in Cameroon, the public health policies may consider these detected HIV hot-spots, while maintaining effective control in other parts of the country.

Programme quality indicators of HIV drug resistance among adolescents in urban versus rural settings of the centre region of Cameroon.

BACKGROUND: The high rate of mortality among HIV-vertically infected adolescents might be favoured by HIV drug resistance (HIVDR) emergence, which calls for timeous actions in this underserved population. We thus sought to evaluate program quality indicators (PQIs) of HIVDR among HIV-vertically infected adolescents on antiretroviral therapy (ART). METHODS: A study was conducted in the Centre region of Cameroon among adolescents (10-19 years) receiving ART in two urban (The Mother-Child Centre of the Chantal BIYA Foundation, the National Social Welfare Hospital) and three rural (Mfou District Hospital, Mbalmayo District Hospital and Nkomo Medical Center) health facilities. Following an exhaustive sampling from ART registers, patient medical files and pharmacy records, data was abstracted for seven PQIs: on-time drug pick-up; retention in care; pharmacy stock outs; dispensing practices; viral load coverage; viral suppression and adequate switch to second-line. Performance in PQIs was interpreted following the WHO-recommended thresholds (desirable, fair and/or poor); with p < 0.05 considered significant. RESULTS: Among 967 adolescents (888 urban versus 79 rural) registered in the study sites, validated data was available for 633 (554 in urban and 79 in rural). Performance in the urban vs. rural settings was respectively: on-time drug pick-up was significantly poorer in rural (79% vs. 46%, p = 0.00000006); retention in care was fair in urban (80% vs. 72%, p = 0.17); pharmacy stock outs was significantly higher in urban settings (92% vs. 50%, p = 0.004); dispensing practices was desirable (100% vs. 100%, p = 1.000); viral load coverage was desirable only in urban sites (84% vs. 37%, p < 0.0001); viral suppression was poor (33% vs. 53%, p = 0.08); adequate switch to second-line varied (38.1% vs. 100%, p = 0.384). CONCLUSION: Among adolescents on ART in Cameroon, dispensing practices are appropriate, while adherence to ART program and viral load coverage are better in urban settings. However, in both urban and rural settings, pharmacy stock outs, poor viral suppression and inadequate switch to second-line among adolescents require corrective public-health actions to limit HIVDR and to improve transition towards adult care in countries sharing similar programmatic features.

Inflammatory profile of vertically HIV-1 infected adolescents receiving ART in Cameroon: a contribution toward optimal pediatric HIV control strategies.

Antiretroviral therapy (ART) has improved the lifespan of people living with HIV. However, their immune system remains in a state of sustained activation/inflammation, which favors viral replication and depletion of helper T-cells with varying profiles according to ART-response. We herein sought to ascertain the inflammatory profile of adolescents living with perinatal HIV-1 infection (ALPHI) receiving ART in an African context. In this cross-sectional and comparative study among ART-experienced ALPHI in Yaoundé-Cameroon, HIV-1 RNA was measured by Abbott Real-time PCR; CD4 cells were enumerated using flow cytometry; serum cytokines were measured by ELISA; HIV-1 proviral DNA was genotyped by Sanger-sequencing; and archived drug resistance mutations (ADRMs) were interpreted using Stanford HIVdb.v9.0.1. Overall, 73 adolescents were enrolled (60 ALPHI and 13 HIV-1 negative peers) aged 15 (13-18) years; 60.00% were female. ART median duration was 92 (46-123) months; median viral load was 3.99 (3.17-4.66) RNA Log10 (copies)/mL and median CD4 count was 326 (201-654) cells/mm3. As compared to HIV-negative adolescents, TNFα was highly expressed among ALPHI (p<0.01). Following a virological response, inflammatory cytokines (IFNγ and IL-12), anti-inflammatory cytokines (IL-4 and IL-10) and inflammation-related cytokines (IL-6 and IL-1ß) were highly expressed with viral suppression (VS) vs. virological failure (VF), while the chemokine CCL3 was highly expressed with VF (p<0.01). Regarding the immune response, the inflammatory cytokine TNFα was highly expressed in those that are immunocompetent (CD4≥500 cell/mm3) vs. immunocompromised (CD4<500 cell/mm3), p ≤ 0.01; while chemokine CCL2 was highly expressed in the immunocompromised (p<0.05). In the presence of ADRMs, IL-4 and CCL3 were highly expressed (p=0.027 and p=0.043 respectively). Among ART-experienced ALPHI in Cameroon, the TNFα cytokine was found to be an inflammatory marker of HIV infection; IFNγ, IL-1ß, IL-6, and IL-12 are potential immunological markers of VS and targeting these cytokines in addition to antiretroviral drugs may improve management. Moreover, CCL3 and CCL2 are possible predictors of VF and/or being immunocompromised and could serve as surrogates of poor ART response.

Preliminary assessment of breastfeeding practices in HIV 1-infected mothers (prior to weaning) under the Djoungolo programme on the prevention of mother-to-child transmission of HIV.

BACKGROUND: Human Immunodeficiency virus (HIV) transmission in a breastfeeding population varies from 20% to 45%. OBJECTIVE: To evaluate breastfeeding practices and the early basic HIV transmission rate in HIV-exposed children in the Djoungolo health district (prevention of mother-to-child transmission HIV programme). METHODS: A cross-sectional survey was conducted, targeting breastfeeding mothers recruited from an observational cohort of HIV-positive pregnant women intending to breastfeed. Routine immunological assessment was carried out for all pregnant HIV-positive women coupled with initiation to highly active anti-retroviral therapy (HAART) in those with CD4 cell counts below 350 mm(-3). Early virological diagnosis of HIV infection was done using real-time Polymerase Chain reaction (PCR) RNA for infants aged between 6 weeks and 6 months. Breastfeeding intervention and counselling support were also provided to respondents. RESULTS: Out of 545 women, 287 births were registered of which 64 of the HIV-infected mothers opted for breastfeeding. The mean CD4 cell count was 446 mm(-3); 34.4% of women were taking HAART. The rate of initiation to breastfeeding was observed to be 53% within 1 h following delivery. At 13 weeks, 96.1% were still exclusively breastfeeding on demand with an average of six feedings in the daytime and three feedings during the night. Of the mothers, 18.5% reported at least one episode of breast and/or nipple pain and 4.9% of mothers were practicing mixed feeding. The early rate of HIV transmission among 47 infants assessed was observed to be 4.3% [95% confidence interval 1-10.1]. CONCLUSION: In an HIV context, routine breastfeeding intervention support associated with access to anti-retroviral therapy for women yet requiring treatment for themselves reduces the practice of mixed feeding and slashes the early mother-to-child HIV transmission rate to 4.3% in breastfeeding populations.

[Transfer and transport of newborn babies in vital distress in Yaoundé, Cameroon: situational analysis conducted in a reference hospital]. / Transfert et transport des nouveau-nés en situation de détresse vitale à Yaoundé, Cameroun: analyse situationnelle dans un hôpital de référence.

INTRODUCTION: This study aims to describe transfer modalities of newborn babies in vital distress to the ESSOS Hospital Center in Yaoundé, Cameroon. METHODS: We conducted a prospective cross-sectional study from October 2014 to January 2015. Data were collected using a short questionnaire from the transfer operator. Main parameters: means of transport, reason for transfer, transfer delay, number of detours (itinerary before admission) prevalence for hypothermia, neonatal mortality rate. RESULTS: We recorded 73 transfers during the study period. Nearly 1/5 (22%) of infants were born within the health district of the reference structure. 24/73 newborns were referred for tertiary care centers (33%). The main reason for transfer was prematurity (40%) followed by neonatal asphyxia (26%). Medical transfer was performed in 5/73 (7%) cases, inter-hospital transfer effected through a nurse was performed in 10/73 (13.6%) cases. The average transfer time was 17 hours, 60% of babies were transferred within the first 6 hours of life, 22% (16/73) within the first two hours of life. For more than half of newborns, a transfer to another hospital was done before admission. Hypothermia (central temperature less than 36° C) on arrival was found in 20% of cases. 15/73 (20.5%) of transferred newborns died. The mean temperature in the dead infants upon their arrival to the hospital was 35.5° C versus 37° C in the non-deceased (p = 0.006). The percentage of newborns who underwent =2 tranfers was 57% in the deceased infants versus 30% in the non-deceased ones (p=0,02). CONCLUSION: In Yaoundé, transfers conditions of newborns in precarious conditions of life hinder early neonatal prognosis because of an erratic itinerary, which increases the risk of hypothermia and death. This reinforces the need for a perinatal network.

Trends of early infant feedings practices after counseling in infant born to HIV positive women in Yaoundé, Cameroon.

UNLABELLED: The objective is to describe the trends of infant feedings choices in HIV context after infant feeding counseling. Descriptive retrospective study: Infant feeding counseling (IFC) sessions were offered to HIV pregnant women by the same team of counselors from April 2008 to December 2012. Counseling content was promoting either exclusive breastfeeding (EBF) or exclusive formula feeding (EFF) prior to 2010. Later on, versus EBF+ antiretroviral (ARV) drug given either to the mother or the infant or EFF was the gold standard. Mixed feeding was prohibited. Infants feeding were practices recorded at the first post natal visit. MAIN MEASUREMENT: rate of EBF/ EFF per year and period. We included a total of 1114 live-born babies. During the five year the overall rate of EBF and EFF stood at 41% and 59% respectively. The rate of EBF/EFF was recorded as follow: varies from 25/75% in year one to 52/48% in year five(p ≤ 0.001). The rate of mixed was virtually cancelled during the same period, 3/237 (1.2%) in year one to period 1/165 (0.6%) in the latest period. In conclusion, in Yaoundé, there is a slight increase in breastfeeding rate among HIV exposed infants during the first two months of life. Further investigations are required to confirm this tendency and analyze the new features of breastfeeding practices.