Hepatitis B virus (HBV) infection is a major public health problem in the world. In Congo, studies on the prevalence of HBV infection are common but HDV infection is rare. Objective: Contribute to improve the management and prevention of HBV and HDV infections. Patients and Methods: This was a descriptive and cross-sectional study conducted from January to August 2016 in the health services of the various departments of Congo and at the national public health laboratory in Brazzaville. All patients with HBsAg surface antigen who were at least 18 years old and who consented to the study were included. The HBs antigen was first tested by a rapid test then confirmed by ELISA. All HBsAg positive patients were subsequently subjected to a second ELISA test for Delta antibody. The techniques of extraction and conventional and specific gene amplification were carried out on plasma for the identification of the genotypes of the two viruses. The data analysis was done with EpiInfo V7 software. The proportions were compared using the Chi-square test or the Fisher test at the significance level of 5%. Results: 1618 subjects were included, of whom 180 were positive for HBsAg, a frequency of 11.12%. The sex ratio (M/F) was 0.77%, the mean age was 40.2 ± 15.6 years with extremes ranging from 18 to 88 years. Of the 180 HBsAg positive, 22 were anti-VHD positive, a frequency of 12.22%. HBV DNA was amplified in 83.8% (151/180), HDV RNA in 63.6% (14/22). For HBV, three genotypes were identified: E (46.9%), A (43.7%) and D (9.4%), however for VHD three genotypes D1, D5, D8 were identified. Conclusion: Co-infection of hepatitis
It concerned diabetic patients followed in Brazzaville and Pointe-Noire agreeing to the study, after obtaining the opinion of the ethics committee of the research in health science. All samples collected were screened for the presence of anti HCV Ab using a rapid ALERE HCV test and the Monolisa HCV Ag-Ab ultra test for confirmation in Congo. Detection of the viral RNA was done by PCR retrotranscription and genotyping was performed according to the reverse hybridization technique in France. Data analysis was done with EpiInfo 6.0 software (2016); the proportions were compared using the Chi-square test or the Fisher test at the significance level of 5%. Results: Of 447 patients with diabetes mellitus, 49 had HCV positive serology and the sex ratio was 0.63. Seroprevalence of AC anti HCV was 11% (49/447); HCV RNA was detectable in 71.4% (n = 35) patients. The average age of the population was 62 ± 10 years with extremes ranging from 26 to 82 years. The circulating genotypes were 4 (97.1%) and 1 (2.8%). Subtyping was defined in 17.64% (n = 6) of genotype 4 patients; undefined in 82.36% (n = 28) of Genotype 4 patients, and in one of genotype 1 patients. The subtypes identified were subtype 4e (60%), subtype 4e (8.8%), subtype 4a/4c/4d (5.8%), and subtype 4h (2.9%).
Objective: To determine the place of two identification tests for Helicobacter pylori infection available in Congo. Materials and Methods: This was a comparative study carried out in two digestive endoscopy centers in Brazzaville from 1 January to 31 May 2018. Symptomatic patients referred for upper gastrointestinal endoscopy were included systematically. The frequency of infection was determined from two identification tests, namely the rapid urease test in gastric biopsies and the detection of antigen (Ag) for the germ in the stool. The criterion for judging the presence of the germ in each patient was the positivity of at least one of the two tests. The McNEMAR X 2 test (p < 0.05) was used for the comparison of averages. Results: During the study period, 137 consenting patients were included, including 62 men and 75 women. The overall incidence of Helicobacter pylori (Hp) infection was 79.6% (109/28). Of the 137 patients, 18 were urease positive only; 6 were looking for Hp Ag in the stool, and 85 were in the two tests. The frequency of infection was 75.2% (103/137) with the rapid urease test and 66.4% (91/137) with the Hp Ag test in stool. The rapid urease test proved more reliable in the diagnosis of Helicobacter pylori infection than the stool antigen test.
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