[Etiological analysis of enteric infectious diseases during Beijing Olympic Games].
OBJECTIVE
To understand pathogen patterns of enteric infectious diseases and its impact on this pattern due to aggregation of a great deal of foreign visitors during Beijing Olympic Games.


METHODS
The diarrheal patient's rectal swabs and stool specimens were collected from Olympic stadium and hospitals of four districts, including Dongcheng, Xicheng, Haidian and Chaoyang. Enteric multiple pathogens were detected from the total 45 specimens. The culture method was used for the enteric bacteria, ELISA and RT-PCR for the enteric viruses. Molecular typing of Salmonella Enteritidis isolation was completed by PFGE.


RESULTS
It was found that 26 out of 45 cases were positive with 57.8 percent for pathogen detection, and 24 were identified as enteric pathogenic bacteria, including Vibrio parahaemolyticus, Salmonella, diarrheagenic Escherichia coli and Campylobacter jejuni, two as norovirus. There were mixed infections of two pathogenic bacteria for three cases. Ten kinds of pathogens were detected from foreign cases, while five kinds from Chinese cases. A total of 5 PFGE patterns were identified in 10 Salmonella Enteritidis isolates from national and foreign diarrheal cases, which were concentrative in some extent.


CONCLUSIONS
Vibrio parahaemolyticus, Salmonella, diarrheagenic Escherichia coli and Campylobacter jejuni were found to be the primary bacterial pathogens during the Olympic Games. Enteric virus infection existed in summer diarrhea.
Huang
Fang
F
Department of Infectious and Endemic Diseases Control, Beijing Center for Disease Prevention and Control, China. hfxdd1775@yahoo.com.cn
Qu
Mei
M
Liu
Yuan
Y
Yan
Han-qiu
HQ
Gao
Zhi-yong
ZY
Dou
Xiang-feng
XF
Zhang
Hai-yan
HY
Zhang
Zhen
Z
Ma
Jian-xin
JX
Guo
Jing
J
D000328:Adult; D015373:Bacterial Typing Techniques; D016123:Campylobacter jejuni / Q000145:classification / Q000302:isolation & purification; D002681:China; D003967:Diarrhea / Q000453:epidemiology / Q000209:etiology* / Q000382:microbiology / Q000821:virology; D004755:Enterobacteriaceae / Q000145:classification / Q000302:isolation & purification; D004770:Enterovirus / Q000302:isolation & purification; D004927:Escherichia coli Infections / Q000382:microbiology; D005260:Female; D006801:Humans; D008297:Male; D012475:Salmonella / Q000145:classification / Q000302:isolation & purification; D012760:Shigella / Q000145:classification / Q000302:isolation & purification; D013177:Sports; D014736:Vibrio parahaemolyticus / Q000145:classification / Q000302:isolation & purification