| Summary: | <p/> <p>Three experiments were carried out to examine the consequences of concurrent infections with <it>Ascaridia galli </it>and <it>Escherichia coli </it>in chickens raised for table egg production. Characteristic pathological lesions including airsacculitis, peritonitis and/or polyserositis were seen in all groups infected with <it>E. coli</it>. Furthermore, a trend for increased mortality rates was observed in groups infected with both organisms which, however, could not be confirmed statistically. The mean worm burden was significantly lower in combined infection groups compared to groups infected only with <it>A. galli</it>. It was also shown that combined infections of <it>E. coli </it>and <it>A. galli </it>had an added significant negative impact on weight gain.</p>
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