CONCURRENT CRYPTOSPORIDIOSIS AND CHICKEN ANEMIA VIRUS-INFECTION IN BROILER-CHICKENS - 2ND COMMUNICATION

According to several data of the literature, cryptosporidia are opport unistic parasites. Associating with different viruses, they may cause respiratory, intestinal or/and kidney alterations. Concurrent infectio n with Cryptosporidium baileyi and chicken anaemia virus (CAV) was obs erved in a flock of 8000 4-week-old broiler chickens. The birds, showi ng overt symptoms of stunted growth and 25% mortality from hatching to 4 weeks of age, harboured the protozoan in the epithelial cells of th e bursa of Fabricius (Fig's I to 4) and the urodeal portion of the clo aca. This is the first report on an outbreak of avian cryptosporidiosi s associated with CAV and first avian cryptosporidiosis diagnosed in H ungary.