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      Influenza A Pandemic (H1N1) 2009 Virus Infection in Domestic Cat

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          Abstract

          Influenza A pandemic (H1N1) 2009 virus continues to rapidly spread worldwide. In 2009, pandemic (H1N1) 2009 infection in a domestic cat from Iowa was diagnosed by a novel PCR assay that distinguishes between Eurasian and North American pandemic (H1N1) 2009 virus matrix genes. Human-to-cat transmission is presumed.

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          Most cited references11

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          Transmission of equine influenza virus to dogs.

          Molecular and antigenic analyses of three influenza viruses isolated from outbreaks of severe respiratory disease in racing greyhounds revealed that they are closely related to H3N8 equine influenza virus. Phylogenetic analysis indicated that the canine influenza virus genomes form a monophyletic group, consistent with a single interspecies virus transfer. Molecular changes in the hemagglutinin suggested adaptive evolution in the new host. The etiologic role of this virus in respiratory disease was supported by the temporal association of rising antibody titers with disease and by experimental inoculation studies. The geographic expansion of the infection and its persistence for several years indicate efficient transmission of canine influenza virus among greyhounds. Evidence of infection in pet dogs suggests that this infection may also become enzootic in this population.
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            Genetic reassortment of avian, swine, and human influenza A viruses in American pigs.

            In late summer through early winter of 1998, there were several outbreaks of respiratory disease in the swine herds of North Carolina, Texas, Minnesota, and Iowa. Four viral isolates from outbreaks in different states were analyzed genetically. Genotyping and phylogenetic analyses demonstrated that the four swine viruses had emerged through two different pathways. The North Carolina isolate is the product of genetic reassortment between H3N2 human and classic swine H1N1 influenza viruses, while the others arose from reassortment of human H3N2, classic swine H1N1, and avian viral genes. The hemagglutinin genes of the four isolates were all derived from the human H3N2 virus circulating in 1995. It remains to be determined if either of these recently emerged viruses will become established in the pigs in North America and whether they will become an economic burden.
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              Avian H5N1 influenza in cats.

              During the 2003 to 2004 outbreak of avian influenza A (H5N1) virus in Asia, there were anecdotal reports of fatal infection in domestic cats, although this species is considered resistant to influenza. We experimentally inoculated cats with H5N1 virus intratracheally and by feeding them virus-infected chickens. The cats excreted virus, developed severe diffuse alveolar damage, and transmitted virus to sentinel cats. These results show that domestic cats are at risk of disease or death from H5N1 virus, can be infected by horizontal transmission, and may play a role in the epidemiology of this virus.
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                Author and article information

                Journal
                Emerg Infect Dis
                Emerging Infect. Dis
                EID
                Emerging Infectious Diseases
                Centers for Disease Control and Prevention
                1080-6040
                1080-6059
                March 2010
                : 16
                : 3
                : 534-537
                Affiliations
                [1]Iowa State University, Ames, Iowa, USA (B. A. Sponseller, E. Strait, A. Jergens, J. Trujillo, K. Harmon, H. Bender, K. Waller, K. Miles, T. Pearce, K.-Y. Yoon, P. Nara)
                [2]US Department of Agriculture National Veterinary Services Laboratories, Ames (L. Koster, M. Jenkins-Moore, M. Killian, S. Swenson)
                Author notes
                Address for correspondence: Brett A. Sponseller, 2134 College of Veterinary Medicine, Iowa State University, 1600 S 16th St, Ames, IA 50011-1248, USA; email: baspon@ 123456iastate.edu
                Article
                09-1737
                10.3201/eid1603.091737
                3322044
                20202440
                9a1f968b-7a4a-4d5c-a6e3-f9b84b2e873d
                History
                Categories
                Dispatch
                Dispatch

                Infectious disease & Microbiology
                expedited,case report,influenza,viruses,real-time pcr,dispatch,zoonoses,cat,pandemic (h1n1) 2009

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