Rapid discrimination of H5 and H9 subtypes of avian influenza viruses and Newcastle disease virus by multiplex RT-PCR.
Avian influenza and Newcastle disease are the highly contagious and most economically important diseases in poultry industry throughout the world. A multiplex reverse transcription polymerase chain reaction (mRT-PCR) assay was developed for the rapid and specific discrimination of H5 and H9 subtypes of avian influenza viruses (AIV) and Newcastle disease virus (NDV). Three sets of specific primers were applied in the assay based on the sequences of the hemagglutinin gene of H5-AIV, H9-AIV and fusion protein gene of NDV. 59 clinical samples including the throat washes, oral swabs, and cloacal scrapings were detected by mRT-PCR and single RT-PCR (sRT-PCR), respectively. The results indicated that the sensitivity and specificity of mRT-PCR were in accordance with sRT-PCR. The mRT-PCR developed in this study may therefore provide a new avenue to rapid detection of these important pathogens in one reaction.
Chen
Hao-tai
HT
Key Laboratory of Animal Virology of Ministry of Agriculture, State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China, haotaichen@tom.com.
Zhang
Jie
J
Sun
De-hui
DH
Zhang
Ji-le
JL
Cai
Xue-peng
XP
Liu
Xiang-tao
XT
Ding
Yao-zhong
YZ
Ma
Li-na
LN
Yang
Sheng-hai
SH
Jin
Lei
L
Liu
Yongsheng
Y
D000818:Animals; D002645:Chickens / Q000821:virology; D004372:Ducks / Q000821:virology; D053124:Influenza A Virus, H5N1 Subtype / Q000145:classification* / Q000235:genetics; D053127:Influenza A Virus, H9N2 Subtype / Q000145:classification* / Q000235:genetics; D005585:Influenza in Birds / Q000821:virology*; D009521:Newcastle Disease / Q000821:virology*; D009522:Newcastle disease virus / Q000145:classification* / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary*; D012680:Sensitivity and Specificity; D013047:Specific Pathogen-Free Organisms