Stephen C. Barr, BVSc, MVS, PhD, DACVIM

Giardia, cryptosporidia, and tritrichomonas.

Sandfly vectors (not in US) transmit flagellated parasites into the skin of a host, where it often localizes in the cat. In dogs, there is invariably spread of the parasite throughout the body to most organs, although renal failure is the most common cause of death.

Parasites are minor cause of nasal disease in dogs and cats. However, they should be added to a differential diagnosis list of nasal disease. This review will discuss the biology, diagnosis, disease, and treatment of these parasites, and discuss the differential diagnosis, and the methodology for treating at least one differential diagnosis, that of nasal aspergillosis in dogs and cats.

Tick-borne diseases of dogs and cats causing vasculitis leading to multisystemic dysfunction often characterized by thrombocytopenia and hyperglobulinemia.

Protozoal disease (genus: Babesia) of dogs and cats where merozoites (piroplasms) infect RBCs.

Parasites are major causes of respiratory tract disease in the dog and cat. Recent advances in therapy of these diseases have been made providing the practicing veterinarian with a more rational treatment modality. This review will discuss the biology, diagnosis, disease, and treatment of respiratory parasites (protozoan, nematode, trematode, and arthropods) of the dog and cat emphasizing chemotherapeutics.