title: [HCV and HBV seropositivity in university students of the State of Nuevo Leòn, Mexico].
abstract: BACKGROUND
  Viral hepatitis is a contagious disease. Patients infected with hepatitis B virus (HBV) or hepatitis C virus (HCV), may be either chronically symptomatic or asymptomatic, and suffer cirrhosis and high risk of hepatic carcinoma.
  
  
  OBJECTIVE
  Asymptomatic carriers of HBV surface antigen (HBs-Ag) or with anti-HCV antibodies are potentially infectious, and therefore a risk to public health.
  
  
  METHODS
  This work seeks to establish the frequency of seropositivity for HBs-Ag and anti-HCV antibodies in a population of 774 newly accepted students of the Medical School of the Autonomous University of Nuevo Leon, whose average age was 18 years. Second generation ELISA test were used to screen for HBs-Ag and anti-HCV antibodies. HBs-Ag was confirmed by a neutralization test and anti-HCV antibodies were confirmed by a RIBA test.
  
  
  RESULTS
  Three sera were positive for HBs-Ag by ELISA and only one serum (0.13% of analyzed samples) was confirmed by the neutralization technique. On the other hand 12 sera were positive for anti-HCV antibodies by ELISA, and eight of these were confirmed by RIBA (1.03% of the analyzed samples). Intensive reactivity bands were found in two sera, and weak reactivity bands were found in six sera. ELISA screening for anti-HCV antibodies showed 0.5% of false positives.
  
  
  CONCLUSIONS
  This study shows that the frequency of anti-HCV antibodies is 7.95% times higher than that found for HBs-Ag. All seropositive patients were asymptomatic and potentially infective. This demonstrates the need to routinely screen for HBs-Ag and anti-HCV antibodies to establish the prevalence of these diseases in our area.
authors.affiliation: Departamento de Microbiología, Facultad de Medicina y Hospital Universitario Dr. José E. González, UANL.
authors.forename: M S
authors.initials: MS
authors.lastname: Flores-Castañeda
authors.forename: B L
authors.initials: BL
authors.lastname: García-Méndez
authors.forename: R
authors.initials: R
authors.lastname: Tijerina-Menchaca
mesh_terms: D000293:Adolescent; D000328:Adult; D002353:Carrier State / Q000453:epidemiology*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D016174:Hepacivirus / Q000276:immunology*; D006509:Hepatitis B / Q000453:epidemiology* / Q000276:immunology; D006514:Hepatitis B Surface Antigens / Q000032:analysis; D006515:Hepatitis B virus / Q000276:immunology*; D006526:Hepatitis C / Q000453:epidemiology* / Q000276:immunology; D018937:Hepatitis C Antibodies / Q000032:analysis; D006801:Humans; D008297:Male; D008800:Mexico; D013334:Students
chemical_list: D006514:Hepatitis B Surface Antigens; D018937:Hepatitis C Antibodies
vernacular_title: Seropositividad de la infección por HCV y HBV, en Estudiantes Universitarios del Estado de Nuevo León, México.