Author: Romagosa, Anna; Allerson, Matt; Gramer, Marie; Joo, Han Soo; Deen, John; Detmer, Susan; Torremorell, Montserrat
Title: Vaccination of influenza a virus decreases transmission rates in pigs Document date: 2011_12_20
ID: 0q8fedqf_52
Snippet: The mean length of the infectious periods (i.e. time between the first and the last day that virus could be detected from nasal swabs (± SD)) in the seeder and in contact pigs are shown in Table 4 . The seeder pigs remained PCR positive for an average of 5.08 ± 0.6 days post infection (dpi) and no differences were observed among them. The average infectious period for the contact infected NV pigs was 4.5 ± 1.07 days and 3.50 ± 1.84 days for t.....
Document: The mean length of the infectious periods (i.e. time between the first and the last day that virus could be detected from nasal swabs (± SD)) in the seeder and in contact pigs are shown in Table 4 . The seeder pigs remained PCR positive for an average of 5.08 ± 0.6 days post infection (dpi) and no differences were observed among them. The average infectious period for the contact infected NV pigs was 4.5 ± 1.07 days and 3.50 ± 1.84 days for the contact infected pigs in the HE group. The infectious period was 1 day shorter in pigs vaccinated with the HE vaccine than in the NV pigs, but the difference was not statistically significant (p = 0.192). The infectious period for the contact infected pigs in the HO group was zero. In addition, the average number of days between exposure and the first pig detected positive was significantly longer in pigs from the HE group (6.87 ± 4.17) compared to the NV group (2.83 ± 1.14) (p = 0.0015).
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