Avian influenza A(H7N9) and (H5N1) infections among poultry and swine workers and the general population in Beijing, China, 2013-2015.
Although several studies have reported seroprevalences of antibody against avian influenza A(H7N9) virus among poultry workers in southern China, results have varied and data in northern China are scarce. To understand risks of H7N9 and H5N1 virus infections in northern China, a serological cohort study was conducted. Poultry workers, swine workers and the general population in Beijing, China, were evaluated through three surveys in November 2013, April 2014 and April 2015. The highest seroprevalence to H7N9 virus among poultry workers was recorded in the April 2014 and April 2015 surveys (0.4%), while that to H5N1 clade 2.3.4 or clade 2.3.2.1 virus was noted in the April 2014 survey (1.6% and 0.2%, respectively). The incidence of H7N9 virus infections among poultry workers (1.6/1000 person-months) was significantly lower than that of H5N1 clade 2.3.4 infections (3.8/1000 person-months) but higher than that of H5N1 clade 2.3.2.1 infections (0.3/1000 person-months). Compared with the general population, poultry workers were at higher risk of contracting H7N9 virus (IRR: 34.90; p < 0.001) or H5N1 clade 2.3.4 virus (IRR: 10.58; p < 0.001). Although risks of H7N9 and H5N1 virus infections remain low in Beijing, continued preventive measures are warranted for poultry workers.
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.|School of Public Health, Capital Medical University, Beijing, China.
Peng
P
Yang
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Chunna
C
Ma
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Shujuan
S
Cui
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Daitao
D
Zhang
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Weixian
W
Shi
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.|School of Public Health, Capital Medical University, Beijing, China.
Yang
Y
Pan
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Ying
Y
Sun
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Guilan
G
Lu
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Xiaomin
X
Peng
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Jiachen
J
Zhao
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Yimeng
Y
Liu
Beijing Center for Disease Prevention and Control, Beijing, China.|Beijing Research Center for Preventive Medicine, Beijing, China.
Quanyi
Q
Wang
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