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Volume 23, Number 10—October 2017

Dispatch

Monitoring Avian Influenza Viruses from Chicken Carcasses Sold at Markets, China, 2016

Xiaoxiao Mao1, Jie Wu1, Eric H.Y. Lau, Kit Ling Cheng, Zhifeng Zhong, Yinchao Song, Xunmin Ji, Lirong Zhou, Changwen Ke, Joseph Sriyal Malik Peiris, Hong Wang2Comments to Author , and Hui-Ling Yen2Comments to Author 
Author affiliations: South China Agriculture University, Guangzhou, China (X. Mao, H. Wang); Guangdong Provincial Center for Disease Control and Prevention, Guangzhou (X. Mao, J. Wu, Z. Zhong, Y. Song, L. Zhou, C. Ke); The University of Hong Kong, Hong Kong, China (E.H.Y. Lau, K.L. Cheng, J.S.M. Peiris, H.-L. Yen)

Main Article

Table 2

AIV subtypes detected by qRT-PCR from swabs of chicken carcasses sold at live poultry markets and from chilled poultry supplied through slaughtering industries, Guangzhou, Guangdong Province, China, June–December 2016*

Subtype
Wholesale market
Retail markets
Supermarket
OP
Cloacal
Visceral cavity
OP
Cloacal
Visceral cavity
OP
Cloacal
Visceral cavity
H9 58/67 (86.6) 39/55 (70.9) 32/48 (66.7) 166/207 (80.2) 143/177 (80.8) 131/203 (64.5) 0/2 1/4 (25.0) 0/2
H5 0/67 0/55 0/48 2/207 (1.0) 1/177 (0.6) 4/203 (2.0) 0/2 0/4 0/2
H7 0/67 0/55 2/48 (4.2) 0/207 0/177 2/203 (1.0) 0/2 0/4 0/2
H5+H9 0/67 0/55 0/48 4/207 (1.9) 6/177 (3.4) 5/203 (2.5) 0/2 0/4 0/2
H7+H9 2/67 (3.0) 3/55 (5.5) 2/48 (4.2) 13/207 (6.3) 6/177 (3.4) 10/203 (5.0) 0/2 0/4 0/2
H5+H7+H9 0/67 0/55 0/48 3/207 (1.5) 5/177 (2.8) 7/203 (3.5) 0/2 0/4 0/2
Non-H5/H7/H9 4/67 (6.0) 3/55 (5.5) 1/48 (2.1) 10/207 (4.8) 7/177 (4.0) 27/203 (13.3) 0/2 1/4 (25.0) 1/2 (50.0)
Low copy (nontypeable)† 3/67 (4.5) 10/55 (18.2) 11/48 (22.9) 9/207 (4.4) 9/177 (5.1) 17/203 (8.4) 2/2 (100.0) 2/4 (50.0) 1/2 (50.0)

*Values are no. positive/no. tested (%). AIV, avian influenza virus; OP, oropharyngeal; qRT-PCR, quantitative real-time reverse transcription PCR.
†Samples with matrix gene copy below linear range of quantification (2.903 log10 matrix gene copies/mL) and are negative for H5/H7/H9 by qRT-PCR.

Main Article

1These authors contributed equally to this article.

2These senior authors contributed equally to this article.

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