Cholelithiasis Basic Information Definition A cholelith is a calculi that develops anywhere within the biliary tree and includes hepatoliths (within intrahepatic ducts) and choledocholiths (within the common bile duct). Choleliths…

Abscess, Perirectal Basic Information Definition Abscessation around the aboral rectum and the anus Epidemiology Risk Factors Anorectal lymphadenopathy can progress to abscessation. Anorectal lymphadenopathy is more common in horses 3…

Colitis X Basic Information Definition Peracute colitis, endotoxic shock, and anaphylaxis of unknown etiology Epidemiology Contagion and Zoonosis Although an infectious or toxic cause is suspected, disease typically occurs in…

Cyanide Toxicosis Basic Information Definition Cyanide poisoning in animals usually results from ingestion of plants containing cyanogenic glycosides. Poisoning may also occur when cyanide is inhaled as gaseous hydrogen cyanide…

Bots Basic Information Definition Infection with larvae of one or more species of botfly. Second- and third-stage larvae of Gasterophilus intestinalis and Gasterophilus nasalis cause focal mucosal irritation in the…

Depigmentation Disorders (Vitiligo) Basic Information Definition • Leukoderma: Depigmentation of the skin • Leukotrichia: Depigmentation of the hair • Reticulated leukotrichia: Cross-hatched or netlike pattern of leukotrichia • Spotted leukotrichia:…

Cryptorchidism Basic Information Definition A state in which a stallion has one or both testes in a location other than the scrotum Synonym(s) Retained testicles, rigs, ridgelings, or originals Epidemiology…

Cystitis, Bacterial Basic Information Definition Bacterial infection of the urinary bladder Epidemiology Risk Factors • Urolithiasis • Neoplasia • Incontinence • Iatrogenic contamination (eg, passage of endoscopes, catheters) Associated Conditions…

Dermatitis, Contact Basic Information Definition Rare form of hypersensitivity associated to contact with potential allergens. Substances that have been identified as potential sources are soaps, shampoos, plants, bedding material, topical…

Cryptosporidiosis Basic Information Definition Infection of the gastrointestinal (GI) tract by the protozoan parasite Cryptosporidium parvum, causing diarrhea Species, Age, Sex Horses of any age may potentially be affected, but…