Mastite subclínica em cabras do Semiárido Paraibano.

Abstract

Aiming to contribute to knowledge about mastitis in goats was done a review of the disease and a study on properties of dairy goats where were analyzed epidemiological and etiological aspects of the disease, in the state of Paraíba and in vitro susceptibility of the etiologic agents to antimicrobial drugs. The literature review identified that the main agents responsible for mastitis in goats are Staphylococcus spp and, according to the presentation, the mastitis are classified as clinical and subclinical. The diagnosis of clinical mastitis is performed by visualizing changes in milk and mammary gland and subclinical form is diagnosed by direct tests such as microbiological isolation and indirect tests, such as California Mastitis Test and Somatic Cell Count. The bacteriological tests are considered the gold standard for diagnosis of intramammary infection. In small ruminants, detailed protocols for treatment of mastitis are not available and these are treated similarly and with drugs available for cattle. Spontaneous cure, commonly reported in cases of subclinical mastitis, often does not occur in goats. The field study was conducted in eight properties semiarid Paraiba. A total of 1990 milk samples were submitted to CMT, microbial isolation, bacterioscopy exams and proof of identification. The CMT showed weak correlation with the microbial isolation, 12.41% of intramammary infections (IIM) and 1.88% of clinical mastitis were identified. A total of 248 bacterial isolates were obtained, with a predominance of Staphylococcus spp. Among these, SCN were the most frequent (86.89%). There were no significant differences regarding age and the occurrence of mastitis. The persistent mastitis was present in 9.34% of the animals. The highest rates of resistance were observed for penicillin (62.61%), tetracycline (23.53%) and oxacillin (19.75%). Resistance to some antimicrobials demonstrates concern about the emergence of strains with multidrug resistant The occurrence of mastitis in goats of different ages and parity, the low association of CMT with microbiological testing shows that many aspects of mastitis goats are not yet understood and need to be clarified for the adoption of appropriate control strategies to the specie.