Virus: Mouse Hepatitis Virus (MHV), Mouse Minute Virus (MMV), Mouse Parvovirus (MPV), Murine Norovirus (MNV), Theiler’s Mouse Encephalomyelitis Virus (TMEV/GDVII), Rotavirus/Epizootic Diarrhea of Infant Mice (EDIM), Mouse AdeNovirus-1 (MAV-FL, MAV-1), Mouse AdeNovirus-2 (MAV-K87, MAV-2), Respiratory Enteric Virus III (REO), Ectromelia Virus (ECTR), Lymphocytic Choriomeningitis Virus (LCMV), Pneumonia Virus of Mice (PVM), and Sendai Virus (SEV). Bacteria: Helicobacter (HELICO), Mycoplasma pulmonis (MPUL), Campylobacter spp (CAMPY), Citrobacter rodentium (CROD), Cilia-Associated Respiratory Bacillus (CARB), Clostridium piliforme (CPIL), Salmonella spp. (SALM), Streptobacillus moniliformis (SMONI), Proteus mirabilis (PMIR), Bordetella bronchiseptica (B.bron, BBRO), Bordetella hinzii (BHIN), Corynebacterium kutscheri (CKUT), Klebsiella oxytoca (KOXY), Klebsiella pneumoniae (KPNE), Rodentibacter pneumotropica (RPNEU), Rodentibacter heylii (RHEYL), Pseudomonas aerugiNosa (PAER), Staphylococcus aureus (SAUR), Streptococcus pneumoniae (SPNE), Streptococcus agalactiae (SAGA), Streptococcus B hem canis (SCAN), Streptococcus B hem equi subs. Zooepidemicus (SEQU), Streptococcus B hem pyogenes (SPYO). Fungi: Pneumocystis carinii (PCAR). Parasites: Fur mites (FUR), Pinworm (PIN), Giardia (GIAR), Spironucleus muris (SMUR), Cryptosporidium spp. (CRYP), Entamoeba muris (EMUR), and Tritrichomonas muris (TMUR).