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  • Title: [Analysis of losses due to subclinical small intestinal coccidiosis caused by Eimeria acervulina and Eimeria maxima under field conditions].
    Author: Voeten AC, Orthel FW, van Rijen MA.
    Journal: Tijdschr Diergeneeskd; 1988 Sep 15; 113(18):989-98. PubMed ID: 3176009.
    Abstract:
    Subclinical coccidiosis of broiler chickens caused by Eimeria (E.) acervulina and E. maxima results in a negative effect on feed conversion and retardation of growth. In the present report investigations in 80 broiler flocks are described in which the relationship between age of infection and economic effects were analysed under field conditions. Under these conditions, infections with E. acervulina and E. maxima were found to have a negative effect on growth and feed conversion, that this negative effect persists and accumulates for approximately three weeks following infection, and is subsequently completely or partly compensated for by increased growth rates. In the present study it was established that the losses due to subclinical coccidiosis of the small intestine in the 80 flocks investigated amounted to 6.4 cents per chicken under conditions occurring in the Netherlands. Ionophorous coccidiostats did not prevent infection with E. acervulina and E. maxima but did prevent infections with E. brunetti, E. necatrix and E. tenella.
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