Viruses: Guinea Pig Adenovirus (GPADV), Parainfluenza Virus 3 (PIV-3), Sendai Virus (SEV), and Guinea Pig CMV (GPCMV). Bacteria and Fungi: Bordetella Bronchiseptica (BBRO), Corynebacterium kutscheri (CKUT), Streptococci b-hemolytic (not group D) (SBETA), and Streptococcus pneumoniae (SPNE), Clostridium piliforme (CPILI), Encephalitozoon cuniculi (ECUN), Salmonella spp. (SALM), and Streptobacillus Moniliformis (SMONI). Parasites: Endoparasites and Ectoparasites.