Outbreak of mastitis in ewes caused by Streptococcus agalactiae

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Published: Nov 29, 2017
DOI: https://doi.org/10.12681/jhvms.15075
Keywords:
Mastitis Streptococcus agalactiae sheep
A. ZDRAGAS (Α. ΖΔΡΑΓΚΑΣ)
Veterinary Research Institute of Thessaloniki, National Agricultural Research Foundation
P. TSAKOS (Π. ΤΣΑΚΟΣ)
Institute of Infectious and Parasitic Diseases, Center of Veterinary Institutes of Thessaloniki
C. KOTZAMANIDIS (Χ. ΚΟΤΖΑΜΑΝΙΔΗΣ)
Laboratory of Industrial Microbiology, Hellenic Sugar Industry
K. ANATOLIOTIS (Κ. ΑΝΑΤΟΛΙΩΤΗΣ)
Institute of Infectious and Parasitic Diseases, Center of Veterinary Institutes of Thessaloniki
I. TSAKNAKIS (Η. ΤΣΑΚΝΑΚΗΣ)
Institute of Infectious and Parasitic Diseases, Center of Veterinary Institutes of Thessaloniki
Abstract

Many cases of acute clinical mastitis, in seven neighboring sheep flocks of Larissa Prefecture, were investigated. The causative agent was identified by biochemical and serological tests as Streptococcus agalactiae. Further investigation of the isolates by pulsed-field gel electrophoresis (PFGE) revealed identical profiles. The results indicate that S. agalactiae should be considered as a significant pathogen that induces mastitis in ewes; the disease is characterized by high morbidity, easy transmission between ewes and rapid reduction in milk production. The antibiotic therapy proved to be ineffective, even though antibiotics administered after the sensitivity test, however, the administration of an autovaccine was promising.

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