Possible Clues:

• A disease of the foot initially infecting rodent
• A painful complaint one finds gnawing in America
• Creature a soldier's dragged in unconscious
• Complaint found in sloth or South American rodent
• Creature a soldier captures abroad
• First letter with complaint I received on rodent
• A disease beginning to incapacitate rodent
• Rabbit's tropical lookalike
• Rodent disease found in sloth
• Rodent, one put down after a painful disease