title: Unusual outbreak of clinical mastitis in dairy sheep caused by Streptococcus equi subsp. zooepidemicus.
abstract: This work describes an outbreak of clinical mastitis affecting 13 of 58 lactating ewes due to Streptococcus equi subsp. zooepidemicus. S. equi subsp. zooepidemicus was isolated in pure culture from all milk samples. All the clinical isolates had identical biochemical profiles and antimicrobial susceptibility patterns and also exhibited indistinguishable macrorestriction patterns by pulsed-field gel electrophoresis, indicating that all cases of mastitis were produced by a single strain.
authors.affiliation: Departamento de Patología Animal I (Sanidad Animal), Facultad de Veterinaria, Universidad Complutense, 28040 Madrid, Spain.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Las Heras
authors.forename: Ana I
authors.initials: AI
authors.lastname: Vela
authors.forename: Elena
authors.initials: E
authors.lastname: Fernández
authors.forename: Emilio
authors.initials: E
authors.lastname: Legaz
authors.forename: Lucas
authors.initials: L
authors.lastname: Domínguez
authors.forename: Jose F
authors.initials: JF
authors.lastname: Fernández-Garayzábal
mesh_terms: D000818:Animals; D004196:Disease Outbreaks; D016521:Electrophoresis, Gel, Pulsed-Field; D005260:Female; D008413:Mastitis / Q000453:epidemiology / Q000662:veterinary*; D008892:Milk / Q000382:microbiology; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D013290:Streptococcal Infections / Q000453:epidemiology / Q000662:veterinary*; D018502:Streptococcus equi / Q000235:genetics / Q000302:isolation & purification*