Various amounts of chitosan (10-200 mg/kg) were administered subcutane
ously to dogs. Anorexia and mortality were observed in dogs given dose
s above 50 mg/kg, and above 150 mg/kg, respectively. In hematologic fi
ndings leukocytosis and increasing of serum LDH(2) and LDH(3) isoenzym
es were characteristic. From the findings of autopsy, severe hemorrhag
ic pneumonia was observed in all dead dogs. Chitosan causes lethal pne
umonia to dogs. Copyright (C) 1996 Elsevier Science Limited.