Fifty-six hamsters with demodicosis were treated with daily oral administra
tion of ivermectin (0.3 mg/kg). Thirty-three cases (58.9%) were cured and 6
cases (10.7%) had improved clinically but needed to continue treatment. Of
5 cases (8.9%) who relapsed within 3 months and were retreated with iverme
ctin, 4 were cured and I needed further treatment. Five cases (8.9%) had im
proved clinically but died within 3 months. Seven cases (12.5%) had not imp
roved and died within 3 months. Overall 49 (87.5%) hamsters had improved cl
inically. No significant differences in prognosis of demodicosis were detec
ted according to sex, breed, age and clinical features, but the prognosis o
f demodicosis in hamsters with concurrent disease was poor.