Azeem S, Guo B, Sun D, Killian ML, Baroch JA, Yoon. Evaluation of PCR-Based Hemagglutinin Subtyping as a Tool to aid in Surveillance of Avian Influenza viruses in Migratory Wild Birds. J Virol Methods. 2022 Aug 2:114594
The surveillance of migratory wild birds (MWBs) for avian influenza virus (AIV) allows detecting the emergence of highly pathogenic AIV that can infect domestic poultry and mammals, new subtypes, and antigenic/genetic variants. The current AIV surveillance system for MWBs in the United States is based on virus isolation (VI) followed by sequencing isolates. This system primarily focuses on the early detection of H5 and H7 AIVs. However, it is suboptimal in assessing diverse AIV subtypes at any given time because of the low VI success rate. To improve such a shortfall, a SYBR? Green-based real-time reverse transcription-polymerase chain reaction (rtRT-PCR) panel was developed for direct HA subtyping of AIVs in oropharyngeal-cloacal (OPC) swabs from MWBs. Under optimal conditions, the PCR panel detected AIVs of all 16 different HA subtypes with an average limit of detection of 102.6 copies/reaction (2μl of extract). In testing 90 OPC swabs from 13 MWB species, the PCR provided a significantly faster turnaround of results and demonstrated the presence of more subtypes and concurrent infection among MWBs compared to what the current surveillance testing algorithm showed. In conclusion, newly developed SYBR? Green rtRT-PCR panel can be a useful tool for monitoring MWBs for AIVs.
See Also:
Latest articles in those days:
- Risk of infection of dairy cattle in the EU with highly pathogenic avian influenza virus affecting dairy cows in the United States of America (H5N1, Eurasian lineage goose/Guangdong clade 2.3.4.4b. ge 12 hours ago
- Avian influenza overview September - November 2025 13 hours ago
- [preprint]Airway organoids reveal patterns of Influenza A tropism and adaptation in wildlife species 13 hours ago
- Cats are more susceptible to the prevalent H3 subtype influenza viruses than dogs 15 hours ago
- Overview of high pathogenicity avian influenza H5N1 clade 2.3.4.4b in wildlife from Central and South America, October 2022-September 2025 15 hours ago
[Go Top] [Close Window]


