[Epidemiological study on leptospirosa infection of host animals and healthy population in flood areas].
OBJECTIVE
To investigate the infection of leptospirosa of host animals and the immune level of healthy population in flood areas.


METHODS
Korth culture was used to culture leptospira for rodent kidney and oxen urine sample. The serogroups of leptospira and leptospira antibody were tested by microscopic agglutination test (MAT).


RESULTS
In flood regions, draw-near-flood region, and new migration region, rodent density was 6.95%, 6.28%, and 8.67%, respectively. The positive rates of rodent with leptospira was 4.63%, 1.35%, and 3.13%, respectively. Leptospira positive rates of oxen urine were 5.88%, 5.98%, and 1.75%, respectively. The main serogroup of leptospira was Icterhamorrhagic and Canicola serogroup. The positive rates of leptospirosa antibody in healthy population was 45.91%, 62.30%, and 58.67%in these 3 regions respectively, which was significantly higher than the average level in China. The dominant serogroups of leptospira in health population were icterhamorrhagic, autumnalis, canicola, pomona and bataviae. The positive rate of antibody had no difference among different age groups.


CONCLUSIONS
The main host animals are rodents and oxen infected with leptospira and the positive rate of leptospira antibody is high in healthy population in the study area. The dominant serogroups in host animals are similar to that in healthy population, which is mostly icterhaemorrhagic.
Zhou
Jia
J
School of Public Health, Central South University,Changsha 410008,China.
Huang
Xin
X
He
Huaxian
H
Zhang
Xiao
X
Liu
Aizhong
A
Yang
Tubao
T
Li
Shuoqi
S
Tang
Xuemin
X
Tan
Hongzhuan
H
D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood* / Q000652:urine*; D002417:Cattle; D002681:China / Q000453:epidemiology; D004190:Disasters; D055868:Floods; D006801:Humans; D007921:Leptospira interrogans / Q000276:immunology / Q000302:isolation & purification*; D007922:Leptospirosis / Q000453:epidemiology*; D015995:Prevalence; D051381:Rats; D016036:Seroepidemiologic Studies
D000907:Antibodies, Bacterial