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J Am Vet Med Assoc. 1989 May 1;194(9):1281-6.

Description of an epizootic and persistence of Streptococcus equi infections in horses.

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  • 1Department of Clinical Studies, New Bolton Center, University of Pennsylvania, Kennett Square 19348.

Abstract

The age-specific attack rates of Streptococcus equi infections of the upper respiratory tract and lymph nodes (strangles) in horses for the different age groups were 17.6% for broodmares, 47.5% for 1-year-old horses, and 37.5% for foals. Streptococcus equi was isolated from nasal, pharyngeal, or lymph node specimens in 31 (60.8%) of 51 sick horses. A male 1-year-old horse, shipped from Kentucky to farm A, was considered to be the index case. Six (19.4%) of 31 horses with strangles remained as shedders of S equi after clinical signs of the disease had ended. Shedders of S equi were not identified from horses that were exposed to infected horses but never developed strangles.

PMID:
2722660
[PubMed - indexed for MEDLINE]
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