The 2001 serological survey in the Czech Republic--viral hepatitis.
Within serological surveys 2001, prevalence of markers of hepatitis viruses A (anti-HAV), B (anti-HBc, HBsAg, anti-HBs) and for the first time also C (anti-HCV) was investigated. Sera were collected in 2001 and tested by respective kits AxSYM, Abbott. HAV: 2,623 sera were tested for the presence of anti-HAV antibodies. Comparison with serological surveys of 1984 and 1996 revealed again shifts of the age prevalence curve for anti-HAV antibodies towards higher age groups corresponding to time intervals between epidemiological surveys. High prevalence rates of anti-HAV antibodies (more than 20%) were only found for the population age groups who lived in the period of high incidence of VHA, i.e. up to 1965. The prevalence of anti-HAV antibodies increased by about 5-10% in the population under 20 years of age, the increase being significant and assumingly attributable to vaccination against VHA, and remained the same as in 1996 in the age group 20-29 years. HBV: 2,568 sera were tested for the presence of anti-HBc antibodies and 76 reactive specimens were further tested for the presence of HBsAg and anti-HBs antibodies. The prevalence of anti-HBc antibodies continuously increases with age. The total prevalence of anti-HBc antibodies calculated for the Czech population is 5.59% compared to 6.95% recorded in 1996. The calculated prevalence rate of HBsAg is 0.56% and that of anti-HBs antibodies is 3.99% for the non-vaccinee population. HCV: The prevalence rate of anti-HCV antibodies was 0.2% with 6 out of 2,950 sera testing positive. Age dependence could not be assessed because of the small number of positive persons. HCV infection is known to afflict high-risk groups, likely to escape a general serological survey, rather than the normal population.
Nemecek
V
V
Centre of Epidemiology and Microbiology, National Institute of Public Health, Prague, Czech Republic. nemecek@szu.cz
Cástková
J
J
Fritz
P
P
Linhartová
A
A
Svandová
E
E
Srámová
H
H
Kríz
B
B
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D018153:Czech Republic / Q000453:epidemiology; D003625:Data Collection; D005260:Female; D006508:Hepatitis Antibodies / Q000097:blood; D006518:Hepatitis Viruses / Q000145:classification / Q000276:immunology; D006525:Hepatitis, Viral, Human / Q000097:blood / Q000453:epidemiology* / Q000276:immunology; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D008875:Middle Aged; D012698:Serologic Tests
D006508:Hepatitis Antibodies