Serology: Kilham Rat Virus (KRV), Toolan’s H-1 Parvovirus (H-1), Pneumocystis carinii (PCAR), Rat Coronavirus (SDAV/RCV), Rat Minute Virus (RMV), Rat Parvovirus (RPV), Rat Theilovirus (RTV), Cilia-Associated Respiratory Bacillus (CARB), Lymphocytic Choriomeningitis Virus (LCMV), Mouse AdeNovirus-1 (MAV-FL, MAV-1), Mycoplasma pulmonis, (MPUL). Fecal PCR: Helicobacter (HELICO), Pinworms (PIN), Klebsiella oxytoca (KOXY), Klebsiella pneumoniae (KPNE). Oral PCR: Rodentibacter pneumotropica (RPNEU), Rodentibacter heylii (RHEYL). Skin PCR: Fur mites (FUR).