ArticleBMC veterinary research2016
Effect of herd size on subclinical infection of swine in Vietnam with influenza A viruses.
Article in BMC veterinary research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.
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Who cites it
19 citing papers in PubMed, 1 synthesis or guideline pooled it, 29 citations in OpenAlex.
- Epidemiological features of influenza circulation in swine populations: A systematic review and meta-analysis.PloS one · 2017Pooled it
- Epidemiology of Influenza A virus in Swiss pig herds: subclinical circulation and associated risk factors.Porcine health management · 2026Article
- Indirect Detection of Swine Influenza Activity in Porcine Blood Using Raman Spectroscopy and Machine Learning.Journal of biophotonics · 2025Article
- Assessment of reproductive challenges and nutritional practices on Pennsylvania sow farms.Translational animal science · 2025Article
- Dynamic of swine influenza virus infection in weaned piglets in five enzootically infected herds in Germany, a cohort study.Porcine health management · 2024Article
- Farm management practices, biosecurity and influenza a virus detection in swine farms: a comprehensive study in colombia.Porcine health management · 2022Article
- A New Sampling Approach for the Detection of Swine Influenza a Virus on European Sow Farms.Veterinary sciences · 2022Article
- Genetic Diversity of the Hemagglutinin Genes of Influenza a Virus in Asian Swine Populations.Viruses · 2022Review
- Reverse Zoonosis of COVID-19: Lessons From the 2009 Influenza Pandemic.Veterinary pathology · 2021Review
- The epidemiology of swine influenza.Animal diseases · 2021Review
- Genetic Characterization of Influenza A Viruses in Japanese Swine in 2015 to 2019.Journal of virology · 2020Article
- A Systematic Review Analyzing the Prevalence and Circulation of Influenza Viruses in Swine Population Worldwide.Pathogens (Basel, Switzerland) · 2020Review
- Surveillance of swine influenza viruses in sentinel familial farms in Hung Yen province in Northern Vietnam in 2013-2014.Zoonoses and public health · 2020Article
- Influenza A virus vaccine research conducted in swine from 1990 to May 2018: A scoping review.PloS one · 2020Article
- Spatiotemporal dynamics and risk factors of rotavirus A circulation in backyard pig farms in a Philippine setting.Tropical animal health and production · 2019Article
- Experimental infection of pigs with H1 and H3 influenza A viruses of swine by using intranasal nebulization.BMC veterinary research · 2018Article
- Evidence for Cross-species Influenza A Virus Transmission Within Swine Farms, China: A One Health, Prospective Cohort Study.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2018Article
- Surveillance for respiratory and diarrheal pathogens at the human-pig interface in Sarawak, Malaysia.PloS one · 2018Article
- Influenza A Viruses of Swine (IAV-S) in Vietnam from 2010 to 2015: Multiple Introductions of A(H1N1)pdm09 Viruses into the Pig Population and Diversifying Genetic Constellations of Enzootic IAV-S.Journal of virology · 2017Article
Corrections and comments
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Authors and funding
19 authors at 5 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundInfluenza A viruses of swine (IAV-S) cause acute and subclinical respiratory disease. To increase our understanding of the etiology of the subclinical form and thus help prevent the persistence of IAV-S in pig populations, we conducted active virologic surveillance in Vietnam, the second-largest pig-producing country in Asia, from February 2010 to December 2013.
resultsFrom a total of 7034 nasal swabs collected from clinically healthy pigs at 250 farms and 10 slaughterhouses, we isolated 172 IAV-S from swine at the weaning and early-fattening stages. The isolation rate of IAV-S was significantly higher among pigs aged 3 weeks to 4.5 months than in older and younger animals. IAV-S were isolated from 16 large, corporate farms and 6 family-operated farms from among the 250 farms evaluated. Multivariate logistic regression analysis revealed that "having more than 1,000 pigs" was the most influential risk factor for IAV-S positivity. Farms affected by reassortant IAV-S had significantly larger pig populations than did those where A(H1N1)pdm09 viruses were isolated, thus suggesting that large, corporate farms serve as sites of reassortment events.
conclusionsWe demonstrate the asymptomatic circulation of IAV-S in the Vietnamese pig population. Raising a large number of pigs on a farm has the strongest impact on the incidence of subclinical IAV-S infection. Given that only some of the corporate farms surveyed were IAV-S positive, further active monitoring is necessary to identify additional risk factors important in subclinical infection of pigs with IAV-S in Vietnam.
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