Hepatitis A Immunity in the District of Aveiro Portugal: An Eleven-Year Surveillance Study 2002–2012Report as inadecuate




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1

Department of Biology and CESAM, University of Aveiro, Aveiro 3810-193, Portugal

2

Clinical Analysis Laboratory Avelab, Rua Cerâmica do Vouga, Aveiro 3800-011, Portugal





*

Author to whom correspondence should be addressed.



Abstract Hepatitis A is a common viral liver disease and brings serious health and economic problems as its epidemiologic pattern changes over time. National serosurveys from developed countries have indicated a decline in HAV hepatitis A virus seroprevalence over time due to the improvement of economic and sanitation levels. The hepatitis A virus HAV immunity rate was surveyed throughout an eleven-year period by sex and age group in Aveiro District. In this retrospective study, blood samples from patients of Aveiro District, in ambulatory regime, collected at the Clinical Analysis Laboratory Avelab between 2002 and 2012 were screened for the presence of antibodies against HAV antigen using a chemiluminescence immunoassay. The global immunity positive total anti-HAV was 60% and only 0.3% of the patients presented recent infection by HAV positive IgM anti-HAV. The HAV immunity was age-dependent p < 0.05, but no significant differences p > 0.05 between sexes were observed. The immunity was similar throughout the study period p > 0.05. The results of this study indicate that young people especially under 25 years old from District of Aveiro are susceptible to HAV infection, constituting a high risk group. The elderly should be also a concern in the future of Hepatitis A infection. View Full-Text

Keywords: Hepatitis A; immunity; surveillance study; epidemiology; Portugal Hepatitis A; immunity; surveillance study; epidemiology; Portugal





Author: Sara Pereira 1, Inês Linhares 1, António Ferreira Neves 2 and Adelaide Almeida 1,*

Source: http://mdpi.com/



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