Pathogen change of avian influenza virus in the live poultry market before and after vaccination of poultry in southern China

Guo, Jin; Song, Wentao; Ni, Xiansheng; Liu, Wei; Wen, Xin; Zhou, Xianfeng; Wang, Wei; He, Fenglan; Wang, Xi; Fan, Guoyin; Zhou, Kun; Chen, Haiying; Chen, Shengen

doi:10.1186/s12985-021-01683-0

Cited by 7 publications

(6 citation statements)

References 35 publications

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“…Although existing vaccines reduce deaths among infected birds, vaccinated birds can still be infected and transmit the virus. Nevertheless, vaccination of poultry against H5 and H7 avian influenza has been compulsory in China since 2017, and there have been no nationwide outbreaks for several years 1718. Authorities in Mexico approved emergency vaccination of poultry against H5N1 in November 2022, and the US will shortly begin testing new vaccines in response to its worst ever H5N1 outbreak 19…”

Section: Vaccinating Poultrymentioning

confidence: 99%

Controlling avian influenza

Leung¹,

Lam

2023

BMJ

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Section: Vaccinating Poultrymentioning

confidence: 99%

Controlling avian influenza

Leung¹,

Lam

2023

BMJ

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“…Strains of highly pathogenic avian influenza (HPAI) virus primarily affect chickens and turkeys [ 83 ], in which they cause severe, systemic disease with high morbidity and mortality. Since 1959, numerous worldwide outbreaks of the disease in poultry and wild birds have been caused by HPAI H5 and H7 viruses carrying diverse NA subtypes [ 95 ]. Transmission of AIVs between birds is followed by direct contact (ingestion or inhalation) with saliva, respiratory secretions, and feces of the infected individual.…”

Section: Influenzamentioning

confidence: 99%

Selected Livestock-Associated Zoonoses as a Growing Challenge for Public Health

Libera

Konieczny

Grabska

et al. 2022

Infectious Disease Reports

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The aim of this paper is to review the most significant livestock-associated zoonoses. Human and animal health are intimately connected. This idea has been known for more than a century but now it has gained special importance because of the increasing threat from zoonoses. Zoonosis is defined as any infection naturally transmissible from vertebrate animals to humans. As the frequency and prevalence of zoonotic diseases increase worldwide, they become a real threat to public health. In addition, many of the newly discovered diseases have a zoonotic origin. Due to globalization and urbanization, some of these diseases have already spread all over the world, caused by the international flow of goods, people, and animals. However, special attention should be paid to farm animals since, apart from the direct contact, humans consume their products, such as meat, eggs, and milk. Therefore, zoonoses such as salmonellosis, campylobacteriosis, tuberculosis, swine and avian influenza, Q fever, brucellosis, STEC infections, and listeriosis are crucial for both veterinary and human medicine. Consequently, in the suspicion of any zoonoses outbreak, the medical and veterinary services should closely cooperate to protect the public health.

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“…Due to the continuing evolution of H5 AIV, vaccine strains are 4 frequently updated to ensure their effectiveness 28,29 . Several studies have suggested that the extensive vaccination of Chinese poultry against H5 AIV has suppressed outbreaks effectively and substantially decreased the prevalence of H5 AIV in live bird markets 26,[29][30][31][32] .…”

Section: Introductionmentioning

confidence: 99%

Association of poultry vaccination with the interspecies transmission and molecular evolution of H5 subtype avian influenza virus

Li,

Raghwani,

Hill

et al. 2023

Preprint

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The effectiveness of vaccinating poultry in preventing the transmission of highly pathogenic avian influenza viruses (AIVs) has been questioned for years and its impact on wild birds is uncertain1–3. Here we reconstruct movements of H5 subtype AIV lineages among vaccinated poultry, unvaccinated poultry, and wild birds, worldwide from 1996 to 2023. We find that lineage transitions among host types are lagged and that movements from wild birds to unvaccinated poultry were more frequent than those from wild birds to vaccinated poultry. However, we also find that the HA gene of the AIV lineage that circulated predominately among Chinese poultry with high vaccination coverage underwent faster evolution and greater nonsynonymous divergence than other lineages. Further, this Chinese poultry lineage contained more codons inferred to be under positive selection, including at known antigenic sites, and its rates of nonsynonymous divergence and adaptative fixation increased after mass poultry vaccination began. Our results indicate that the epidemiological, ecological and evolutionary consequences of widespread AIV vaccination in poultry may be linked in complex ways, and that much work is needed to better understand how such interventions may affect AIV transmission to, within and from wild birds.

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Pathogen change of avian influenza virus in the live poultry market before and after vaccination of poultry in southern China

Cited by 7 publications

References 35 publications

Controlling avian influenza

Controlling avian influenza

Selected Livestock-Associated Zoonoses as a Growing Challenge for Public Health

Association of poultry vaccination with the interspecies transmission and molecular evolution of H5 subtype avian influenza virus

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