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Nursery pig health and performance

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dc.contributor.advisor Friendship, Robert De Bruyn, Karen Marie 2019-09-12T19:10:58Z 2019-09-12T19:10:58Z 2019-09 2019-08-02 2019-09-12
dc.description.abstract The growth performance and the presence of common respiratory pathogens were studied. Fifty nurseries were sampled including farms that routinely used in-feed antimicrobials (conventional), and farms that used no antimicrobials. These latter farms were classified as “raised-without-antibiotics” (RWA) and organic. No difference was found between the growth rates of RWA and conventional nursery pigs (P > 0.05), while organic pigs grew slower than conventional pigs (P < 0.001). Based on serology, approximately a third of nurseries were seropositive for porcine reproductive and respiratory syndrome virus and this had a negative impact on individual pig growth rates. 80 % of nurseries were seropositive for influenza A virus. It was observed that most farms vaccinated weaned pigs for Mycoplasma hyopneumoniae so seroprevalence was not possible to assess. Despite vaccination, 73 % of these nurseries were classified as seronegative based on samples taken from pigs at the end of the nursery stage. en_US
dc.description.sponsorship OMAFRA New Directions, OMAFRA U of G Research partnership, Ontario Pork en_US
dc.language.iso en en_US
dc.rights Attribution 4.0 International *
dc.rights.uri *
dc.subject nursery pig en_US
dc.subject swine en_US
dc.subject health en_US
dc.subject performance en_US
dc.subject Mycoplasma hyopneumoniae en_US
dc.subject Porcine reproductive and respiratory syndrome en_US
dc.subject Influenza A virus en_US
dc.subject growth en_US
dc.subject organic en_US
dc.subject Raised without antibiotics (RWA) en_US
dc.subject antibiotic-free en_US
dc.title Nursery pig health and performance en_US
dc.type Thesis en_US Population Medicine en_US Master of Science en_US Department of Population Medicine en_US
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Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International