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Fig. 2 | Porcine Health Management

Fig. 2

From: Associations between animal and herd management factors, serological response to three respiratory pathogens and pluck lesions in finisher pigs on a farrow-to-finish farm

Fig. 2

Least square means ± standard error for sample-to-positive (S/P) ratio values for Actinobacillus pleuropneumonia (App) and Mycoplasma hyopneumoniae (Mhyo) and sample-to-negative (S/N) ratio values swine influenza virus (SIV) by production flow for finisher pigs at slaughter. All pigs were born within 1 week from a single farrowing batch and followed from birth to slaughter on an Irish farrow-to-finish commercial farm. All pigs were slaughtered at 24 weeks and were retrospectively classified into three production flows according to the time required to move to the next production stage (Flow 1 = normal; Flow 2 = delayed by 1 week; Flow 3 = delayed by more than 1 week). Pigs were selected from each flow in a nested case control study matched by sow parity, birth body weight and number of piglets born alive. Swine influenza virus sample-to-negative values are inversely proportional to the quantity of antibodies present.a,b Within each pathogen, significant differences between production flows; P < 0.05

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Porcine Health Management

ISSN: 2055-5660

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