Virus: Rat Coronavirus (SDAV/RCV), Rat Minute Virus (RMV), Rat Parvovirus (RPV), Toolan’s H-1 Parvovirus (H-1), Kilham Rat Virus (KRV), Rat Theilovirus (RTV), Mouse Adenovirus FL, K87 (MAV), Respiratory Enteric Virus III (REO), Pneumonia Virus of Mice (PVM), Hantaan Virus (HAN), and Sendai Virus (SEV). Bacteria: Helicobacter (HELICO), Streptobacillus moniliformis (SMONI), Mycoplasma pulmonis, (MPUL), Campylobacter spp (CAMPY), Cilia-Associated Respiratory Bacillus (CARB), Clostridium piliforme (CPIL), Salmonella spp. (SALM), Proteus mirabilis (PMIR), Bordetella bronchiseptica (B.bron, BBRO), 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 B hem canis (SCAN), Streptococcus B hem equi subs. Zooepidemicus (SEQU), and 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).