Introduction: Chronic hepatitis B virus infection is very common in sub-Saharan Africa and widely distributed worldwide. The purpose of this study was to determine the prevalence of hepatitis B virus in N'Djamena, Chad. Methodology: This was a cross-sectional study conducted in the city of N'Djamena. Three neighborhoods were randomly selected. The methodology applied was a two-stage probability survey with the neighborhoods as the primary unit and the squares (sectors) as the secondary unit. Persons from the selected households were screened for HBV infection. Results: Two hundred and ninety-nine (299) individuals were recruited in this study series. The majority were men (69.6%). The mean age was 29.5 ± 9 years with extremes of 15 to 45 years. The prevalence of those screened was 24.1% with a male predominance (54.1%). There was a statistically significant difference between HBsAg carriage and sex (p = 0.001). On the other hand, the difference between HBV carriage and education level was not statistically significant. In addition, few people had information on the modes of transmission of HBV and their serological status. Conclusion: Viral hepatitis B is a major global public health problem. However, most of the people recruited in this series were unaware of their status and very few had information on this disease.

Introduction: Viral hepatitis B constitutes a real global public health problem. According to the WHO, Chad is one of the so-called high endemic areas for the hepatitis B virus. The aim of this study was to improve the prevention of hepatitis B virus in the university environment. Methodology: This was a cross-sectional study with a descriptive aim, spread over a period of one year. The university campus of Toukra and the Faculty of Exact and Applied Sciences of Farcha were used as study settings. The data were collected on a standardized form. Results: Five hundred (500) students were interviewed. The average age was 23.06 ± 2.8 years. The sex ratio was 2.9. The vast majority (91.4%) had heard of viral hepatitis B. School and university awareness were the main sources of information. The clinical signs frequently cited by the respondents were fatigue and fever. However, little was known about the mode of transmission. The majority cited saliva as the source of contamination (76.2%). Among the means of prevention, vaccination was cited by 55.8% of participants. Only 19.4% of the participants admitted to being immune to the virus. However, 79.8% wanted to be vaccinated against the disease. The majority (83.4%) felt that going to the health service was the best way to deal with HBV exposure. Conclusion: Although most respondents had good knowledge of the disease, very few were vaccinated. There is a need to expand vaccination to the general population.