Miscellaneous Bacterial Infections ---------------------------------- A wide variety of other bacteria can cause illness in pet mice and rats. Your veterinarian is best equipped to diagnose and prescribe medications for these diseases. Wounds (from fighting and other forms of trauma) are commonly infected with bacteria that already exist within the living quarters. Abscesses commonly result from wounds when they have gone unnoticed and untreated. Successful treatment of certain wounds (especially long and deep cuts) and abscesses requires veterinary intervention. Abscesses usually must be surgically opened because the relatively solid nature of rodent pus precludes lancing and draining them.