Avian influenza virus infection in people occupied in poultry fields in Guangzhou city
10.3760/cma.j.issn.0254-6450.2009.11.004
- VernacularTitle:广州市禽类从业人群禽流感病毒感染特征分析
- Author:
Yang LIU
1
;
En-Jie LU
;
Yu-Lin WANG
;
Biao DI
;
Tie-Gang LI
;
Yong ZHOU
;
Li-Li YANG
;
Xiao-Yin XU
;
Chuan-Xi FU
;
Ming WANG
Author Information
1. 广州市疾病预防控制中心
- Keywords:
Avian influenza;
H5N1;
H9N2;
H7N7;
Infection rate
- From:
Chinese Journal of Epidemiology
2009;30(11):1111-1113
- CountryChina
- Language:Chinese
-
Abstract:
Objective To conduct serological investigation on H5N1/H9N2/H7N7 infection among people occupied in poultry fields. Methods Serum samples were collected from people working in live poultry and none-poultry retailing food markets, poultry wholesaling, large-scale poultry breading factories and in small-scale farms, wide birds breeding, swine slaughtering houses and from normal population. Antibodies of H5, H9 and H7 with hemagglutination inhibition and neutralization tests were tested and analyzed. Logistic regression and χ2 test were used. Results Among 2881 samples, 4 were positive to H5-Ab(0.14%), 146 were positive to H9-Ab (5.07%) and the prevalence of H9 among people from live poultry retailing (14.96%) was the highest. Prevalence rates of H9 were as follows: 8.90% in people working in the large-scale poultry breading factories, 6.69% in the live poultry wholesaling business, 3.75% in the wide birds breeding, 2.40% in the swine slaughtering, 2.21% in the non-poultry retailing, 1.77% in the rural poultry farmers and 2.30% in normal population. None was positive to H7-Ab among 1926 poultry workers. Conclusion The H5 prevalence among people was much lower than expected, but the H9 prevalence was higher. None of the populations tested was found positive to H7-Ab. There was a higher risk of AIV infection in live poultry retailing, wholesaling and large-scale breading businesses, with the risk of live poultry retailing the highest. The longer the service length was, the higher the risk existed.
