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Elevada circulación del genotipo F del virus de la hepatitis B en población infectada urbana no migratoria y migratoria de Venezuela / High circulation of genotype F hepatitis B non-migratory and migratory urban population infected virus Venezuela
Machado, I; Fortes, MP; Vargas-Lovelle, B; López, D; León, R; Senior, M; Bacalao, R; López, CE; Pestana, E; Dagher, L; Piñero, R; Rojas, B; Garassini, ME; Vetencourt, M; Lizarzábal, M; Fernández, S; Silva, E; Balabú, M.
  • Machado, I; s.af
  • Fortes, MP; s.af
  • Vargas-Lovelle, B; s.af
  • López, D; s.af
  • León, R; s.af
  • Senior, M; s.af
  • Bacalao, R; s.af
  • López, CE; s.af
  • Pestana, E; s.af
  • Dagher, L; s.af
  • Piñero, R; s.af
  • Rojas, B; s.af
  • Garassini, ME; s.af
  • Vetencourt, M; s.af
  • Lizarzábal, M; s.af
  • Fernández, S; s.af
  • Silva, E; s.af
  • Balabú, M; s.af
GEN ; 65(2): 105-107, jun. 2011. ilus, tab
Article in Spanish | LILACS | ID: lil-664126
RESUMEN

Introducción:

Se ha demostrado ampliamente que el genotipo F del virus de la hepatitis B (VHB) es dominante en nuestra población Amerindia. Recientemente, nosotros identificamos que en los pacientes infectados por VHB habitantes no migratorios de áreas urbanas venezolanas prevalece también el genotipo F.

Objetivo:

Determinar los genotipos del VHB en portadores crónicos urbanos migratorios y compararlos con el grupo no migratorio. Material y

Métodos:

Se investigaron 136 portadores crónicos del VHB, 110 no inmigrantes y 26 inmigrantes de origen asiático. Se evaluaron antígeno eHB y anti-eHB y los genotipos del VHB, este último mediante PCR.

Resultados:

En los 110 pacientes urbanos venezolanos persistió la elevada frecuencia del genotipo F (95%) con 3 casos coinfectados, 2 por genotipos A+F y 1 caso con genotipos E+F. Interesantemente, 2 casos demostraron genotipo D del VHB. Hepatitis crónica B (HCB) antígeno-e positivo fue diagnosticada en 83 pacientes (80,6%) mientras 20 casos (19,4%) presentaron HCB antígeno-e negativo. En los pacientes asiáticos infectados con un solo genotipo se identificó el C en 11 casos, el B en 4 pacientes, el F en 3 y, en 1 caso, genotipo D. Se demostró coinfección entre estos diferentes genotipos, incluyendo un caso coinfectado con genotipo E. El genotipo F se encontró coinfectando a 4 pacientes, 2 de ellos con genotipo C. Doce casos presentaron HCB antígeno e positivo y 14 pacientes HCB antígeno e negativo. De los pacientes infectados con genotipo C, 7 de ellos (54%), incluyendo los 2 coinfectados con genotipo F, presentaron HCB antígeno-e negativo.

Conclusión:

Es notoria la elevada circulación del genotipo F del VHB en nuestras áreas urbanas...
ABSTRACT

Introduction:

It has been widely demonstrated that the genotype F of hepatitis B virus (HBV) is dominant in our Amerindian population. Recently, we identified that genotype F is prevalent in HBV non-migratory infected patients living in urban areas.

Objective:

To determine the genotypes of HBV in migratory chronic carriers compared to non-migratory population. Material and

Methods:

We investigated 136 chronic HBV carriers, 110 non-immigrants and 26 immigrants of Asian origin. We assessed hepatitis B e-antigen and antibody and HBV genotypes, the latter using PCR.

Results:

High prevalence (95%) of genotype F persisted among 110 Venezuelan urban patients, with 3 co-infected patients, 2 with genotypes A+F and 1 case with E+F. Interestingly, 2 cases showed HBV genotype D. Chronic hepatitis B (CHB) e-antigen positive was diagnosed in 83 patients (80.6%) while 20 cases (19.4%) showed CHB e-antigen negative. In Asian patients infected with one sole genotype, C was identified in 11 cases, B in 4 patients, F in 3, and in 1 case, genotype D. Co-infection was demonstrated among these different genotypes, including one case co-infected with genotype E. Genotype F was found in 4 co-infected patients, 2 with genotype C. Twelve cases had CHB e-antigen positive and 14 CHB e-antigen negative. From patients infected with genotype C, 7 of them (54%), including 2 co-infected with genotype F, demonstrated CHB e-antigen negative.

Conclusion:

It is remarkable the high circulation of HBV genotype F in our urban areas. However, given the distinct outcome described in CHB genotype F and the identification of other genotypes rather than F in urban areas, suggests that inclusion of HBV genotypes in Venezuela, should be considered standard in the management of CHB regardless the patient’s geographical origin.
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Epidemiology / Genotyping Techniques / Hepatitis B Type of study: Evaluation studies / Prognostic study / Risk factors Limits: Female / Humans / Male Country/Region as subject: South America / Venezuela Language: Spanish Journal: GEN Year: 2011 Type: Article

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Full text: Available Index: LILACS (Americas) Main subject: Epidemiology / Genotyping Techniques / Hepatitis B Type of study: Evaluation studies / Prognostic study / Risk factors Limits: Female / Humans / Male Country/Region as subject: South America / Venezuela Language: Spanish Journal: GEN Year: 2011 Type: Article