Kilham Rat Virus (KRV), Pneumocystis carinii (PCAR), Rat Coronavirus (SDAV/RCV), Rat Minute Virus (RMV), Rat Parvovirus (RPV), Rat Theilovirus (RTV) & Toolan’s H-1 Parvovirus (H-1), Cilia-Associated Respiratory Bacillus (CARB), Lymphocytic Choriomeningitis Virus (LCMV), Mouse AdeNovirus-1 (MAV-FL), Mycoplasma pulmonis (MPUL), Pneumonia Virus of Mice (PVM), Respiratory Enteric Virus III (REO), and Sendai Virus (SEV).