Porcine coccidiosis caused by Isospora suis mainly occurs in piglets ranged from one to three months.

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• The causative agents of acute coccidiosis are （）
• The clinical signs of caecal coccidiosis include （）
• Prevention of avian coccidiosis could be achieved by drug prevention and vaccine immunization.
• The preventive drugs of avian coccidiosis include ivermectin, maduramicin ammonium premix and diclazuril premix etc.
• The effective drug for avian coccidiosis is（）