Viruses: Mouse Hepatitis Virus (MHV), Mouse Minute Virus (MMV), Mouse Parvovirus (MPV), Murine Norovirus (MNV), Rotavirus/Epizootic Diarrhea of Infant Mice (EDIM), Theiler’s Mouse Encephalomyelitis Virus (TMEV/GDVII), Lymphocytic Choriomeningitis Virus (LCMV), Mouse Adenovirus-1 (MAV-FL), Mouse Adenovirus-2 (MAV-K87), Pneumonia Virus of Mice (PVM), Respiratory Enteric Virus III (REO), and Sendai Virus (SEV). Bacteria and Fungi: Mycoplasma pulmonis, (MPUL) and Clostridium piliforme (CPILI).