Virus survival and fitness when multiple genotypes and subtypes of influenza A viruses exist and circulate in swine.

Virus survival and fitness when multiple genotypes and subtypes of influenza A viruses exist and circulate in swine. Virology. 2019 Apr 09;532:30-38 Authors: Ma J, Shen H, McDowell C, Liu Q, Duff M, Lee J, Lang Y, Hesse D, Richt JA, Ma W Abstract We performed swine influenza virus (SIV) surveillance in Midwest USA and isolated 100 SIVs including endemic and reassortant H1 and H3 viruses with 2009 pandemic H1N1 genes. To determine virus evolution when different genotypes and subtypes of influenza A viruses circulating in the same swine herd, a virus survival experiment was conducted in pigs mimicking field situations. Five different SIVs were used to infect five pigs individually, then two groups of sentinel pigs were introduced to investigate virus transmission. Results showed that each virus replicated efficiently in lungs of each infected pig, but only reassortant H3N2 and H1N2v viruses transmitted to the primary contact pigs. Interestingly, the parental H1N2v was the majority of virus detected in the second group of sentinel pigs. These data indicate that the H1N2v seems to be more viable in swine herds than other SIV genotypes, and reassortment can enhance viral fitness and transmission. PMID: 31003122 [PubMed - as supplied by publisher]
Source: Virology - Category: Virology Authors: Tags: Virology Source Type: research

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Source: Frontiers in Physiology - Category: Physiology Source Type: research
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Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
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Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
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Source: Vaccine - Category: Allergy & Immunology Authors: Tags: Vaccine Source Type: research
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Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
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Source: Emerging Infectious Diseases - Category: Infectious Diseases Authors: Tags: Emerg Infect Dis Source Type: research
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Source: Infection, Genetics and Evolution - Category: Genetics & Stem Cells Authors: Tags: Infect Genet Evol Source Type: research
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