Parasporal crystal proteins of Bacillus thuringiensis strain BT6, originating from the faeces of Sika Deer, demonstrate anticoccidial activity against Eimeria tenella in chickens

摘要

The parasporal crystal proteins (Cry) of?Bacillus thuringiensis?(Bt) strain BT6, which was isolated from Sika Deer faeces, exhibited a similar effect with diclazuril for controlling the infection with?Eimeria tenella?in chickens. A far more considerable body weight gain was found in the chickens treated with BT6 Cry proteins, as compared to chemical drug-treated groups, infected-untreated groups and even the uninfected group. This work is a preliminary contribution aiming to develop Bt Cry proteins for fighting coccidiosis in chickens.