[Assessment of vaccination status and booster vaccinations in adolescents attending school in Libreville, Gabon]

Task-Shifting Immunization Activities to Community Health Workers: A Mixed-Method Cross-Sectional Study in Sahel Region, Burkina Faso

INTRODUCTION

Faced with the frequent disruptions to the health care system and provision of immunization services caused by terrorist attacks that began in 2015, the Sahel region in Burkina Faso initiated resilience strategies, including the task-shifting of immunization activities to community health workers (CHWs). This strategy was designed to involve more CHWs in the vaccination delivery process and ultimately to improve the performance of the health care system.

STRATEGY DEVELOPMENT AND IMPLEMENTATION

The task-shifting strategy began as a pilot in Djibo health district in 2019 and then extended to all 4 districts of the Sahel region. CHWs included both personnel recruited through the Ministry of Health and Public Hygiene processes at the national level and other community members who support the operation of health facilities. They were trained on standardized immunization modules and provided with vaccines by functional health facilities teams. Implementation initiated with the administration of oral antigens by CHWs. Subsequently, their service delivery was expanded to include injectable vaccines in the context of the worsening terrorist attacks and the urgent need to protect the health of local populations affected by the security and humanitarian crisis.

STRATEGY EVALUATION

The intervention was evaluated through an internal programmatic review conducted as a descriptive cross-sectional study implemented from August 1 to October 28, 2022, in the Sahel region, including a survey in Dori health district. CHWs involved in implementing the strategy were considered for interviews. Performance indicators for all antigens have shown an upward trend since the strategy's inception in 2019.

CONCLUSION

The task-shifting of immunization activities to CHWs has been implemented successfully in a region seriously affected by terrorism-related insecurity. It holds the promise of maintaining or even improving performance if institutionalized and scaled up while improving the monitoring of adverse events following immunization by the CHWs.

Drastic sex-dependent etiological distribution in severe liver diseases from Gabon

Chronic liver diseases still represent a worrying public health issue in Sub-Saharan Africa. In this region, emphasis is generally made on hepatocellular carcinoma (HCC) albeit liver cirrhosis (LC) is also responsible for an important death toll. Very few studies have compared the presentation and etiologies of cancer and cirrhosis of the liver in Middle Africa. We conducted a comparative retrospective analysis of 74 and 134 cases of patients with HCC and LC treated in Libreville, Gabon. Viral or lifestyle risk factors, clinical symptoms, and biological features were compared. We observed that ages of diagnosis were 53.2 ± 15.7 years and 48.6 ± 18.6 years for HCC and LC with remarkably low M:F sex ratios (1.3–1.8). Ethanol consumption was highly prevalent in both disease types (65.0%–70.0%). Chronic viral infections with hepatitis B (HBV) or C (HCV) virus were also widespread with slight domination of the former in both diseases (43.4% vs. 34.3%, and 35.9% vs. 28.5%). Patients with HCC were presenting very late with a mean diameter of the main nodule of 84 ± 50 mm and a multifocal pattern in 72.7% of cases. HCC developed on a cirrhotic liver in 91.7% of cases. Serum AFP was frankly elevated (>400 ng/ml) in only 35.8% of HCC cases. The most striking feature of the HCC series was the contrasted contribution of distinct pathogenic etiologies involving sex, viral, metabolic, and toxic factors. A frequently dysmetabolic condition synergizing with hepatitis C (anti-HCV, 73.8% vs 22.7%, p < 0.0001) in females and a male cancer promoted by recreational toxicants and chronic hepatitis B (HBsAg, 83.5% vs 35.9%, p < 0.0001) were observed. Men with HCC were considerably younger than women (46.8 ± 14.5 years vs. 62.2 ± 12.2 years, p < 0.0001). Further studies are now warranted to identify routes of HCV transmission and if they are still fueling reservoirs of future patients. Public policies to prevent alcohol-related harm have also to be urgently implemented in Gabon.