Seroprevalence against Norwalk-like human caliciviruses in beijing, China
- PMID: 10568770
- DOI: 10.1002/(sici)1096-9071(200001)60:1<97::aid-jmv16>3.0.co;2-d
Seroprevalence against Norwalk-like human caliciviruses in beijing, China
Abstract
Serum specimens from 1,109 individuals at different ages in Beijing, China, were collected between April 1996 and March 1997 and tested for IgG antibodies against human caliciviruses using enzyme immune assays (EIAs). Baculovirus-expressed recombinant Norwalk virus (rNV) and Mexican virus (rMxV) capsid proteins were used as antigens. The seroprevalence was 89% for rNV and 91% for rMxV. Similar seroprevalence between the two antigens was observed in individual age groups and both genders. Infants had a high seroprevalence (99% for NV and 94% for MxV) at birth. The lowest seroprevalence (41% for rNV and 36% for rMxV) was at 7-11 months of age. A sharp increase in seroprevalence occurred in early childhood, with 65% and 70% at one, 85% and 90% at three, and 100% and 98% at 8-9 years of age for rNV and rMxV, respectively. Forty-three individuals had antibody against rNV but not rMxV and 63 individuals had antibody against rMxV but not rNV, indicating different levels of exposure to the two strains in these individuals. This is the first report of surveillance of antibodies against NV-like viruses in China. The observed high prevalence and early age antibody acquisition suggest that infection by these two human calicivirus strains is common in this population.
Copyright 2000 Wiley-Liss, Inc.
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