ABSTRACT
The interactive effect of Escherichia coli and pure caecal Eimeria sp. in broiler chickens was studied. Single and dual orally inoculations were assessed in 6 groups of 20 chicks each. Neither mortalities nor clinical signs were recorded on inoculated groups or control. There was a significant decrease in body weights in groups infected either with E. coli or caecal Eimeria sp. or with both pathogens. The total oocyst output and caecal lesion score were high and severe in chicks infected with caecal Eimeria sp. alone or with E. coli prior to caecal Eimeria infection. Low oocyst output and moderate caecal lesion score were noticed in chicks inoculated with E. coli prior to or together with caecal Eimeria infection. The results suggested a synergistic action between E. coli and caecal Eimeria sp. in producing gross lesions. The electrophoretic distribution of serum proteins decreased in all chicks compared with control. The changes in serum protein fractions differed in inoculated groups and all protein components decreased quantitatively compared with controls. It was also shown that E. coli did not always invade the blood stream
Subject(s)
Animals , Coccidiosis/veterinary , Escherichia coli/pathogenicity , Eimeria/pathogenicity , Cecal Diseases/parasitology , ChickensABSTRACT
E reportada a observaçâo de lesoes pseudocistica em cecos pilóricos de sardinha-verdadeira (Sardinella brasiliensis) associada a parasitose por Scolex pleuronectis. Dos 250 espécimes necropsiados, 65 por ciento apresentavam a lesâo que se caracterizava, histopatologicamente, por esclerose e retraçâo do tecido conjuntivo da camada submucosa originando, como consequencia, a estenose cecal