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  • Title: Porcine parvovirus: natural and experimental infections of the porcine fetus and prevalence in mature swine.
    Author: Redman DR, Bohl EH, Ferguson LC.
    Journal: Infect Immun; 1974 Oct; 10(4):718-23. PubMed ID: 4426705.
    Abstract:
    Antibodies against porcine parvovirus were detected in 17 of 116 prenursing pig sera. Antibodies against transmissible gastroenteritis or ECPO-6 (an enterovirus) were not detected in prenursing sera of the pigs tested. Seventy-seven percent of 129 serum samples from 23 Ohio farms and 82% of 96 samples from slaughter plants in Ohio were serologically positive for porcine parvovirus. Mummies or other abnormalities were not observed in newly born pigs exposed to porcine parvovirus by the transuterine route 101 days after gestation. Indirect evidence suggested that the virus had not spread to other fet uses following exposure after 101 days at least not in a sufficient amount of time to stimulate detectable antibody. Direct intrafetal exposure to porcine parvovirus (i.m. injection, transutero) after 62 days of gestation resulted in dealth and mummification of the two fetuses, and apparently in the subsequent spread of the virus, as five of nine live pigs born were serologically positive for porcine parvovirus and these five pigs had not been injected with the virus. Immunoglobulin G was detected in all newborn pigs irregardless of known antigenic stimulation or the presence of specific antibody. In general, the presence of immunoglobulin M or immunoglobulin A in fetal serum was correlated with a history of antigenic stimulation or the presence of detectable antibody.
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