title: [The cohort study on inapparent infection of HFRS in population of Apodemus-type endemic area and in that of Rattus-type endemic area].
abstract: Between 1988 and 1990, the positive seroconversion rates of HFRS were tested with a random sample of 7,145 persons in Apodemus-type endemic area and Rattus-type endemic area(type A; type R) in Shandong Province. The results showed that: (1) the highest positive seroconversion rate was in the group of peasants of 20 to 49 years of age in the area of type A; (2) in the area of type R, there was no statistically significant difference in positive seroconversion rates of age, and housewives had the highest rate. The male/female ratio was 2.1-2.2:1 and 0.9:1, respectively in the two types of endemic area. The ratio of apparent infection to inapparent infection was 1:22.6 and 1:42, respectively in the two types of area. It is concluded that inapparent infection is dominant in HFRS infection and there are probably many potential inapparent infections among the population.
authors.affiliation: Dept. of Epidemiology, Shandong Medical University, Jinan.
authors.forename: G
authors.initials: G
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D002353:Carrier State / Q000453:epidemiology*; D002648:Child; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D004197:Disease Reservoirs; D005260:Female; D006476:Orthohantavirus / Q000145:classification / Q000276:immunology; D006480:Hemorrhagic Fever with Renal Syndrome / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009115:Muridae / Q000382:microbiology*; D051381:Rats / Q000382:microbiology*; D012703:Serotyping
chemical_list: D000914:Antibodies, Viral