Applied research note: Surveillance of newcastle disease virus in a live poultry market in Guangdong, China reveals increasing prevalence of class I NDV
2025
Yulin Yan | Yu Yang | Gaojie Chen | Jing Liu | Runzhi Liu | Jinyue Guo | Zhaoping Liang | Tao Ren | Shujian Huang | Feng Wen
Summary: Newcastle disease, caused by Newcastle disease virus (NDV), poses a significant threat to global poultry production due to its highly contagious nature and diverse genotypes. To assess the current NDV situation in southern China, 335 fecal swab samples were collected from a live poultry market in Foshan, Guangdong Province, between 2023 and 2024. Hemagglutination (HA) testing identified 51 positive samples (15.2 %), followed by RT-PCR confirmation of the M gene in 13 of these samples (3.9 %). Full-length sequencing of the F gene from 12 of the M gene-positive samples (3.6 %) revealed the presence of 12 Class I NDV strains belonging to subtype 1.1.2, highlighting an increasing trend of Class I NDV isolates in the positive samples from this market over time. Our findings underscore the importance of continuous surveillance for NDV, particularly Class I strains, which can be easily overlooked due to their low pathogenicity. The study provides updated data for understanding the evolving epidemic situation of Class I NDV in China, thereby informing the development of effective control strategies to mitigate potential outbreaks and safeguard poultry populations.
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