| secular trends in hepatitis a virus infection among alaska natives. | to assess the epidemiologic characteristics of the population susceptible to hepatitis a virus (hav) infection and determine the natural history of infection, a retrospective survey was done using banked serum specimens. a random sample of 4030 alaska natives statewide was selected, stratified by year of birth and community of residence. overall, 1988 serum samples (49.3%) tested positive for antibody to hav (anti-hav). past hav infection was strongly age-related, increasing from 7% in persons b ... | 1993 | 8376812 |
| impact of recurrent epidemics of hepatitis a virus infection on population immunity levels: bristol bay, alaska. | the dynamics of population-based immunity were examined by using serologic surveys of 7 villages in rural alaska between 2 epidemics of hepatitis a virus (hav) and after the second epidemic (1988-1990). among persons aged 2-30 years, the overall age-adjusted prevalence of antibody to hav (anti-hav) was 51% in 1983 and 49% in 1993 (p=.506). in children aged <5 years, prevalence rates were 0% and 11% in 1983 and 1993, respectively. the prevalence of hav infection increased with age in both surveys ... | 2002 | 12355357 |
| impact of a statewide childhood vaccine program in controlling hepatitis a virus infections in alaska. | historically, alaska experienced cyclic hepatitis a virus (hav) epidemics, and the hav rate among alaska native people was significantly higher than among other racial/ethnic groups. we evaluated the impact of universal childhood vaccination, initiated in 1996, on hav epidemiology in alaska by analyzing hav cases reported to the state of alaska. hav incidence in all age groups declined 98.6% from 60.0/100,000 in 1972-1995 to 0.9/100,000 in 2002-2007. the largest decrease (99.9%) was in alaska na ... | 2010 | 20637769 |
| foodborne hepatitis a--missouri, wisconsin, and alaska, 1990-1992. | person-to-person spread is the predominant mode of transmission of hepatitis a virus (hav) infection. however, based on findings for national surveillance for viral hepatitis, since 1983, 3%-8% of reported hepatitis a cases have been associated with suspected or confirmed foodborne or waterborne outbreaks (1). this report summarizes three recent foodborne outbreaks of hepatitis a and addresses the prevention of this problem. | 1993 | 8321179 |
| positive test results for acute hepatitis a virus infection among persons with no recent history of acute hepatitis--united states, 2002-2004. | hepatitis a is a nationally reportable condition, and the surveillance case definition includes both clinical criteria and serologic confirmation. state health departments and cdc have investigated persons with positive serologic tests for acute hepatitis a virus (hav) infection (i.e., igm anti-hav) whose illness was not consistent with the clinical criteria of the hepatitis a case definition. test results indicating acute hav infection among persons who do not have clinical or epidemiologic fea ... | 2005 | 15889006 |
| hepatitis a vaccination coverage among children aged 24-35 months--united states, 2004-2005. | after the licensure of hepatitis a vaccine in 1995 for children aged > or =24 months, the advisory committee on immunization practices (acip) incrementally expanded the proportion of children for whom it recommended the vaccine. in 1996, acip recommended vaccinating children in communities that had high rates of hepatitis a virus (hav) infection, including american indian/alaska native (ai/an) communities and selected hispanic and religious communities. in 1999, acip extended the recommendation ... | 2007 | 17625495 |
| hepatitis a prevalence among injection drug users. | the purpose of this study was to develop a descriptive model of the association between injection drug use and hepatitis a (hav) in a sample of injection drug users (idus). | 2006 | 16617553 |