The virus isolation analysis of the H5N1 subtype human avain influenza cases in mainland China from 2005 to 2009.
- Author:
Shu-mei ZOU
1
;
Ye ZHANG
;
Zi LI
;
Jie DONG
;
Xin-sheng ZHAO
;
Li-bo DONG
;
Le-ying WEN
;
Cui-ling XU
;
Min WANG
;
Jun-feng GUO
;
He-jiang WEI
;
Rong-bao GAO
;
Xiu-ping WANG
;
Yue-long SHU
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Chick Embryo; China; epidemiology; Humans; Influenza A Virus, H5N1 Subtype; classification; genetics; isolation & purification; Influenza, Human; epidemiology; virology; Respiratory System; virology
- From: Chinese Journal of Experimental and Clinical Virology 2009;23(6):409-411
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo analyse the correlation between the virus isolation and the specimen collection of the H5N1 human high pathogenic avain influenza cases in Mainland China.
METHODSThe specimens were collected in Mainland China from 2005.10 to 2009.3 and the H5N1 viruses were isolated by passage in embryonated chicken eggs.
RESULTSMost specimens were obtained within 14 days after disease onset. For the specimens collected within 7 days, the isolation rate was relatively high and the difference of the positive rate between different years was lower than those specimens collected after 7 days. Most of the samples in our study were collected from the upper or lower respiratory tract with few from blood, feces, et al. The isolation rate of lower respiratory specimens was higher and the difference of the positive rate between different years was relatively lower than those from upper respiratory specimens.
CONCLUSIONWe suggest that the samples should be collected from lower respiratory tract during the acute phase to get the higher isolation rate.