Microbiologic characterization of equine mastitis

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Motta, Rodrigo Garcia [UNESP]
Listoni, Fernando José Paganini [UNESP]
Ribeiro, Márcio Garcia [UNESP]
Bussalaro, Viviane Aparecida
Link, Angélica
Almeida, Rodrigo Pressoto
Cappellozza, Bruno Ieda

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Mastitis occurrence in mares is low if compared to other livestock species. The microorganisms often isolated and detected in milk and mammary gland secretions of mares are Streptococcus beta-haemolytica, Staphylococcus spp., Pseudomonas aeruginosa, Actinobacillus spp., and enterobacter. The present experiment was designed to evaluate the main microorganisms present in the milk of healthy mares and having a mammary infection. One hundred and ten mammary glands from 55 lactating mares were analyzed, ranging from 15 to 150 d post-partum. The mastitis diagnostic was performed through analysis of the milk via the screened test of the mug with dark background (Tamis), mammary gland inflammation and/or systemic signs. The subclinical mammary gland infection was characterized via the California Mastitis Test (CMT). From the 55 lactating mares, 2 (3.64%) had clinical mastitis. Following the CMT, the mares presented: 13 (23.60%), 7 (12.72%), and 12 (21.88%) scores from 1+, 2+, and 3+, respectively. From the 110 mamary glands were analysed, in 47 (85.45%) of these samples strains of microorganisms were isolated. In summary, results from our experiment suggest a low occurrence of clinical mastitis in lactating mares.



Mares, Mastitis, Microorganisms

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Journal of Bacteriology and Parasitology, v. 5, n. 3, p. 186-188, 2014.