Background: The distribution of hepatitis C virus (HCV) genotypes in the Western Province of Saudi Arabia is unknown. The purpose of our study was to determine the prevalent HCV genotypes among HCV seropositive Saudi patients in the Western Province, and to study the relationship between types/subtypes, clinical status and liver histology.
Patients And Methods: Serum samples were collected from 140 consecutive patients attending the Hepatology Clinic with varying grades of liver diseases, high alanine transferase (ALT) for >6 months, positive HCV, qualitative PCR, and who had had liver biopsy. HCV genotyping was determined on patients who had tested positive by both HCV enzyme immunoassay (EIA) and recombinant immunoblot assay (RIBA).
Results: Of the 140 patients, 97 (69.2%) had genotype 4, 18 (12.8%) had genotype 1a, and 16 (11.4%) had genotype 1b. Genotypes 2b and 5 were found in two patients (1.4%) each, while 5 patients (3.6%) had mixed infections with genotypes 4 and 5. Of the 97 patients infected with genotype 4, 84 (86.6%) had chronic active hepatitis (CAH), two (2.1%) had CAH with active cirrhosis, 9 (9.3%) had cirrhosis and two (2.1%) had normal liver histology (NLH).
Conclusion: The most prevalent HCV genotype in the Western Province of Saudi Arabia was genotype 4 (69.2%). Genotype 1b was encountered in 16 (11.4%) patients. For the first time, genotype 5 was identified in the Western Province of Saudi Arabia. Genotypes 1b and 4 were associated with different histological grades of liver disease.
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