Abstract
Ivermectin was used for treating a breeding colony of guineapigs heavily infested with fur mite Chirodiscoides caviae. In preliminary experiments on different dosages and routes of administration, spraying with diluted Ivomec® (ivermectin 0.2 mg/ml) as well as applying undiluted ivermectin (10 mg/ml) drops on the fur proved effective and practical. The breeding colony was treated with diluted ivermectin aerosol and retreated two weeks later with undiluted ivermectin drops applied to the coat. After 3 months neither mites nor mite eggs were observed on microscopic examination. Two-and-a-half years later, the guineapigs are still free of mites.