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  • Title: Streptococcus equi meningoencephalomyelitis in a foal.
    Author: Finno C, Pusterla N, Aleman M, Mohr FC, Price T, George J, Holmberg T.
    Journal: J Am Vet Med Assoc; 2006 Sep 01; 229(5):721-4. PubMed ID: 16948585.
    Abstract:
    CASE DESCRIPTION: A 4-month-old American Paint Horse colt was evaluated because of acute onset of ataxia, left-sided head tilt, and fever and a recently noticed heart murmur. Upper respiratory tract infection caused by Streptococcus equi subsp equi had been diagnosed at 3 months of age. CLINICAL FINDINGS: Hematologic abnormalities included leukocytosis, mature neutrophilia, monocytosis, and mild anemia. Analysis of a CSF sample revealed high total protein concentration and total nucleated cell count; nucleated cells consisted mainly of degenerate neutrophils. Results of a real-time PCR assay were positive for S equi subsp equi, and a diagnosis of S equi subsp equi meningoencephalomyelitis was made. TREATMENT AND OUTCOME: Treatment included administration of potassium penicillin and fluids, but the foal developed uroperitoneum and was subsequently euthanized. Postmortem examination revealed meningoencephalomyelitis, and S equi subsp equi was cultured from a brain aspirate. Additional findings included suppurative cystitis with rupture and neutrophilic myocarditis. CLINICAL RELEVANCE: Findings suggest that S equi subsp equi meningoencephalomyelitis should be considered in the differential diagnosis for foals with neurologic signs that have a history of strangles or exposure to affected horses.
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