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Organophosphate toxicity causes cholinergic overstimulation (SLUD signs: salivation, lacrimation, urination, defecation) along with muscle tremors, colic, and sweating. It may occur from exposure to contaminated pasture, pesticides, or feed. Hypocalcemia in horses is rare. Ionophore toxicity causes myocardial necrosis and weakness, not cholinergic signs. Equine metabolic syndrome is a chronic condition with obesity and laminitis. NAVLE requires rapid recognition and treatment (atropine, pralidoxime, supportive care).

BVD virus can cause acute mucosal disease in persistently infected cattle, producing erosions, bloody diarrhea, and “button ulcers” in the cecum/colon. Salmonellosis causes hemorrhagic enteritis but not button ulcers. Johne’s disease causes chronic wasting, not acute hemorrhagic diarrhea. Winter dysentery leads to self-limiting diarrhea in adults, not ulceration. NAVLE emphasizes herd health, viral pathogenesis, biosecurity, and diagnostics (PCR, ELISA).

Blastomycosis, caused by Blastomyces dermatitidis, is endemic to the Mississippi, Ohio, and Missouri River valleys. It causes pyogranulomatous pneumonia with cavitary lesions, sometimes disseminating to skin and eyes. Histoplasmosis is also endemic but usually causes diffuse granulomas. Coccidioidomycosis occurs in the Southwest. Cryptococcus is more common in cats. NAVLE emphasizes fungal diagnostics, geography, and antifungal therapy.

Professional competency includes integrity and conflict-of-interest management. Accepting gifts creates bias and undermines trust. Ethical prescribing is based solely on medical efficacy, safety, and client affordability. Disclosure does not mitigate ethical conflict. NAVLE evaluates awareness of professional boundaries, ethical standards, and responsible prescribing. Maintaining objectivity ensures patient welfare and public confidence in veterinary medicine.

Equine infectious anemia (EIA), caused by a lentivirus, is diagnosed via the Coggins test (AGID). Clinical signs include fever, anemia, weight loss, and edema. Piroplasmosis is tick-borne and diagnosed via blood smears/PCR. Influenza and EVA cause respiratory disease, not chronic anemia. NAVLE emphasizes regulatory medicine, lifelong carrier states, and mandatory reporting.