Distribution of hepatitis B virus genotypes among patients with chronic infection

Autor: Campos, Gubio Soares, Angelo, Ana Luiza Dias, Ribeiro, Nadia Regina Caldas, Braga, Eduardo Lorens, Santana, Nelma Pereira de, Gomes, Michele Mesquita Soares, Pinho, João Renato Rebello, Carvalho, Wilson Andrade de, Lyra, Luiz Guilherme Costa, Lyra, André Castro
Jazyk: angličtina
Rok vydání: 2006
Předmět:
Zdroj: Repositório Institucional da UFBA
Universidade Federal da Bahia (UFBA)
instacron:UFBA
ISSN: 1478-3231
DOI: 10.1111/j.1478-3231.2006.01280.x
Popis: Texto completo: acesso restrito. p.636–642 Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-08-01T17:57:44Z No. of bitstreams: 1 j.1478-3231.2006.01280.x.pdf: 866168 bytes, checksum: 1e7290b4fe2088d0694be33e7733dc70 (MD5) Made available in DSpace on 2013-08-01T17:57:44Z (GMT). No. of bitstreams: 1 j.1478-3231.2006.01280.x.pdf: 866168 bytes, checksum: 1e7290b4fe2088d0694be33e7733dc70 (MD5) Previous issue date: 2006 Abstract: Hepatitis B virus (HBV) can be classified into at least eight genotypes, A–H. We evaluated the distribution HBV genotypes among patients with chronic infection. Methods: We consecutively evaluated adult patients with chronic HBV infection from Salvador, Brazil. Patients were classified according to HBV infection chronic phases based on HBV-DNA levels and presence of serum HBV markers. HBV-DNA was qualitatively and quantitatively detected in serum by polymerised chain reaction (PCR). Isolates were genotyped by comparison of amino acid mutations and phylogenetic analysis. Results: One-hundred and fourteen patients were evaluated. HBV-DNA was positive in 96 samples. HBV genotype was done in 76. Mean age was 36±11.3. In 61 of 76 cases subjects were classified as inactive HBsAg carriers. Their mean HBV serum level was 1760 copies/ml and 53 of 61 were infected with HBV genotype A, seven with HBV genotype F and one with genotype B. Twelve of the 76 patients had detectable hepatitis B e-antigen (HBeAg) in serum. Ten were infected with HBV genotype A and two with genotype F; most had increased alanine aminotransferase and high HBV-DNA levels. Three patients were in the immunotolerant phase, two were infected with HBV genotype A and one with genotype F. HBV subtyping showed subtypes adw2 and adw4. Conclusions: HBV genotype A adw2 and genotype F adw4 were the most prevalent isolates found. We could not find differences in genotype distribution according to HBV clinical phases and DNA levels. We did not detect HBV genotype D in contrast to a previous study in our center with acute hepatitis B. All inactive HBsAg carriers had low HBV-DNA levels.
Databáze: OpenAIRE
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