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Exposure to environmental stressors result in increased viral load and further reduction of production parameters in pigs experimentally infected with PCV2b.

Patterson R, Nevel A, Diaz AV, Martineau HM, Demmers T, Browne C, Mavrommatis B, Werling D - Vet. Microbiol. (2015)

Bottom Line: Porcine circovirus type 2 (PCV2) has been identified as the essential, but not sole, underlying infectious component for PCV-associated diseases (PCVAD).These stressors were identified recently as risk factors leading to the occurrence of severe PCVAD on a farm level.Furthermore, all stressors led to an increased viral load in serum and tissue as assessed by qPCR, although levels did not reach statistical significance.

View Article: PubMed Central - PubMed

Affiliation: Royal Veterinary College, Department of Pathology and Pathogen Biology, Hawkshead Lane, AL9 7TA, UK.

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Related in: MedlinePlus

Mean Average daily weight gain (ADG) of treatment groups per study week. With the exception of control pigs (C), all pigs were infected with PCV2b (V) on week 0 and subjected to high stocking density (SD), high temperatures (T) or both (SD T). Weights were recorded weekly up to 8 weeks post inoculation. Average daily weight gain per week was calculated for each pig, and a mean ADG per treatment group estimated. Stars shown above the graph indicate significant ANOVA p-values between the C and treatment groups, with: *p < 0.05; **p < 0.01; ***p < 0.001. P-values for LSD post hoc test are presented within the text.
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fig0010: Mean Average daily weight gain (ADG) of treatment groups per study week. With the exception of control pigs (C), all pigs were infected with PCV2b (V) on week 0 and subjected to high stocking density (SD), high temperatures (T) or both (SD T). Weights were recorded weekly up to 8 weeks post inoculation. Average daily weight gain per week was calculated for each pig, and a mean ADG per treatment group estimated. Stars shown above the graph indicate significant ANOVA p-values between the C and treatment groups, with: *p < 0.05; **p < 0.01; ***p < 0.001. P-values for LSD post hoc test are presented within the text.

Mentions: Each pig in the study was weighed weekly and the mass of feed consumed by pigs in each room throughout each week was recorded. The mean weekly mass (Fig. 1) and the mean average daily weight gain (ADG, Fig. 2) and feed conversion ratios (FCR, Table 1) were recorded for each room.


Exposure to environmental stressors result in increased viral load and further reduction of production parameters in pigs experimentally infected with PCV2b.

Patterson R, Nevel A, Diaz AV, Martineau HM, Demmers T, Browne C, Mavrommatis B, Werling D - Vet. Microbiol. (2015)

Mean Average daily weight gain (ADG) of treatment groups per study week. With the exception of control pigs (C), all pigs were infected with PCV2b (V) on week 0 and subjected to high stocking density (SD), high temperatures (T) or both (SD T). Weights were recorded weekly up to 8 weeks post inoculation. Average daily weight gain per week was calculated for each pig, and a mean ADG per treatment group estimated. Stars shown above the graph indicate significant ANOVA p-values between the C and treatment groups, with: *p < 0.05; **p < 0.01; ***p < 0.001. P-values for LSD post hoc test are presented within the text.
© Copyright Policy - CC BY
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4441105&req=5

fig0010: Mean Average daily weight gain (ADG) of treatment groups per study week. With the exception of control pigs (C), all pigs were infected with PCV2b (V) on week 0 and subjected to high stocking density (SD), high temperatures (T) or both (SD T). Weights were recorded weekly up to 8 weeks post inoculation. Average daily weight gain per week was calculated for each pig, and a mean ADG per treatment group estimated. Stars shown above the graph indicate significant ANOVA p-values between the C and treatment groups, with: *p < 0.05; **p < 0.01; ***p < 0.001. P-values for LSD post hoc test are presented within the text.
Mentions: Each pig in the study was weighed weekly and the mass of feed consumed by pigs in each room throughout each week was recorded. The mean weekly mass (Fig. 1) and the mean average daily weight gain (ADG, Fig. 2) and feed conversion ratios (FCR, Table 1) were recorded for each room.

Bottom Line: Porcine circovirus type 2 (PCV2) has been identified as the essential, but not sole, underlying infectious component for PCV-associated diseases (PCVAD).These stressors were identified recently as risk factors leading to the occurrence of severe PCVAD on a farm level.Furthermore, all stressors led to an increased viral load in serum and tissue as assessed by qPCR, although levels did not reach statistical significance.

View Article: PubMed Central - PubMed

Affiliation: Royal Veterinary College, Department of Pathology and Pathogen Biology, Hawkshead Lane, AL9 7TA, UK.

Show MeSH
Related in: MedlinePlus