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Pig Journal Volume: 61
Publication date: June 2008

Research Papers

COSTS OF SUB-CLINICAL ILEITIS DURING FINISHING: AN EXPERIMENTAL APPROACH
A.M. SCHOLZ, S. NUSKE, P. KREMER and M. FORSTER

Abstract
It is widely acknowledged that ileitis can cause economic losses in pig herds in the absence of any overt clinical signs such as diarrhoea or increased mortality. In order to evaluate the costs of sub-clinical ileitis, a study was performed at the Livestock Centre Oberschleissheim of the Ludwig Maximilian's University Munich comparing the biological and economic performances of pigs protected against the damage of Lawsonia intracellularis infection by vaccination against those of control animals.

The cost of sub-clinical ileitis reached 7.6 €per pig. The main factors affected were growth rate, feed conversion efficiency and carcase value. The vaccinated group had a significantly higher carcase weight (+5.7 kg/pig), a significantly higher growth rate (+56 g/d), in addition to a slightly improved feed conversion efficiency (-0.15 kg/kg). Although the carcase composition did not differ significantly between the groups, an increased payment of +0.02 €/kg was received for vaccinated animals a consequence of improved fulfillment of contract specification in AUTOFOM classification and weight category.

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