2.1.6 Does the farm size influence the Ileitis ELISA profile?
It is often argued that large farms have more difficulties to meet good animal health requirements than smaller farms. For L. intracellularis the opposite seems to be true (Figure 2.1.6a).
Figure 2.1.6 a
Ileitis ELISA values in small farms (< 800 fattening places) and big farms (> 800 fattening places).
* means with non overlapping 0.95 confidence intervals are significantly different.
Because, pigs in smaller farms showed an earlier seroconversion and significantly higher ELISA values at the 13 th week of life than pigs from larger farms. Large farms appear to be able to meet the sanitary requirements better than smaller farms. Although the probability to see an early seroconversion is higher in smaller than in bigger farms, any decision of the timing of treatment or vaccination should be based on the individual profile of the respective farm.
© Boehringer Ingelheim Animal Health GmbH, 2006
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