Survey of PPV and SE shows vaccination failure on Canadian farms

Researchers from Hipra recommend a revision of vaccination protocols following the discovery of vaccination failures on Canadian farms.

10 July 2019

5 minute read

By: Mike DeGroot

Table 3 columns by 6 rows shows sample size of 476 — Table 1
Herd sampling. Min-Max means the minimum or maximum number of samples submitted per farm for each cluster

Chart showing that gilts and sows are significantly different groups when antibodies respond to PPV — Figure 1
Antibody response against PPV in sows of different parity; results are represented as average and standard deviation of the percentage of negative breeders per farm. Different letters denote a statistical significant difference (Mann-Whitney U test; p<0.05).

Chart showing that gilts and sows are significantly different groups when antibodies respond to SE but with lower percent incidence than PPV — Figure 2
Antibody response against SE in sows of different parity; results are represented as average and standard deviation of the percentage of negative breeders per farm. Different letters denote a statistical significant difference (Mann-Whitney U test; p<0.05).

References
References
[1] Shimoji Y
(2000)	Microbes Infect 965-972.
[2] Giménez-Lirola LG. et al.
(2012)	J Microbiol Methods, 91: 73-79.

Mike DeGroot

Hipra

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