Avian cecal coccidiosis by Eimeria tenella
Eimeria tenella is an intestinal parasite belonging to the family Eimeriidae that causes a hemorrhagic typhlitis in birds. Their oocysts have a size of 19×32 microns and have no micropyles. These morphological characteristics along the specificity of cecal lesions facilitate the clinical diagnosis at farm level using a simple pocket microscope. The development of cecal coccidiosis in poultry may be due to inefficiency of coccidiostats, by emergence of resistance, or continuous reinfection due to the presence of Alphitobius diaperinus, a coprophag beetle that acts as a vector of many pathogens (Salmonella, Corynebacterium, avian infectious bursal disease, Newcastle disease virus, Eimeria, Choanotaenia and Railletina) in poultry farm.