Preface. Chapter 1: Respiratory System: Bacterial: Bordetella bronchiseptica, Streptococcus zooepidemicus, Mycoplasma, Chlamydophia felis. Viral: Canine influenza virus, Canine parainfluenza virus, Canine adenovirus, Feline herpesvirus, Feline calicivirus, Canine respiratory coronavirus. Fungal/Mycotic: Cryptococcus, Aspergillus, Blastomyces, Coccididioidomyces, Histoplasma. Parasitic/Protozoal: Nasal Mites (Pneumonyssoides caninum), Dirofilaria, Angiostrongylus vasorum, Wolbachia. Lungworms: Oslerus osleri, Capillaria/ Eucoleus/Paragonimus, kellitcotti, Aleurostrongylus, Crenosoma, Filaroides.Chapter 2: Enteric (GI): Bacterial GI: Salmonella, Campylobacter, Clostridium perfringens, Clostridium difficile, Yersinia. Other/clinical relevance: E.coli, Helicobacter. Viral GI: Canine parvovirus, Feline panleukopenia virus, Norovirus, Coronavirus, Rotavirus. Parasitic/Protozoal GI: Cryptosporidum, Giardia, Coccidia, Tritrichomonas, Toxocara, Baylisascaris, Echinococcus, Taenia, Whipworms, Hookworms, Physaloptera, Hetrobilharzia, Ollulanus. Fungal GI: Histoplasma. Parasitic - Liver & pancreatic flukes: Platynosonum concinnum, Eurytrema procyonis. Chapter 3: Urinary System: Bacterial: Bacterial Cystitis & pyelonephritis & prostatitis, Staph, Strep, Enterococcus, E.coli, Leptospira, MDR, Mycoplasma, Ureaplasma, Coryne, Fungal: UTI. Parasitic - Renal: Dioctophyme renale. Chapter 4: Neurologic System: Bacterial: Clostridium tetani, Clostridium botulinum. Viral: Rabies, EEE, West Nile virus, Pseudorabies, Distemper, Prions. Chapter 5: The Skin and Wounds: A. The Skin: Parasitic: Otodectes, Demodex, Cheyletiella, Sarcoptes, Notoedres, Sporothrix, Cuterebra. Fungal: Dermatophytes. Bacterial: Pyoderma, Otitis, Staph sp..B. Draining Wounds: Bacterial: Nocardia, Actinomyces, C. Atypical pathogens: Bacterial: Mycobacterium-NTM, TB & feline leprosy. Chapter 6: Hematologic and Multi-system (Vector borne) Pathogens: Bacterial: Bartonella, Ehrlichia, Anaplasma, Rickett