Abstract
1024x768 Mastitis is an inflammation of the mammary gland caused mainly by microorganisms, altering the characteristics of milk and results in significant economic losses for this production complex. The study aimed to determine the main causative agents of bovine mastitis in a dairy farm in Rio Pomba city, Minas Gerais state, Brazil, and evaluate the use of plant extract and antibiotics commonly used in the control of microorganisms that cause this disease. Raw milk samples coming from 47 dairy cow were individually collected for microbiological evaluation. We also evaluated the sensitivity of isolates from the plant extract and the antibiotics commonly used in the farm. It was found that 17.0 %, 31.9 %, 85.4 % and 38.3 % of the samples presented, respectively, Staphylococcus aureus , coliforms, faecal coliforms and Escherichia coli. Furthermore, most of the samples showed counts of aerobic mesophilic microorganisms and Streptococcus sp. between 10 4 and 10 5 CFU.mL -1 , while the counts of S. aureus ranged between 10 2 and 10 3 CFU.mL -1 in most of samples. A higher efficacy of tetracycline on the isolates of S. aureus was verified and of ampicillin on the E. coli isolates. All isolates of the latter bacteria were resistant to plant extract. Due to the high incidence of microorganisms, we emphasize the need for implementation of Good Agricultural Practices in milk production, because these bacteria are coming from hair, skin, mucous membranes of animals and/or belonging to the enteric microbiota of mammals, respectively. Normal 0 21 false false false PT-BR X-NONE X-NONE st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:Tabela normal; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:Calibri,sans-serif;}
Highlights
A mastite bovina é uma doença de grande importância na pecuária leiteira, que ocasiona a inflamação da glândula mamária, sendo responsável por perdas econômicas significativas
Segundo Silva et al, (2010) esse composto apresenta potencial para tratamento de mastite bovina, uma vez que foi o mais efetivo dos extratos naturais testados contra S. aureus isolados de leite cru da região de Rio Pomba, MG
A contagem de microrganismos mesófilos aeróbios, estafilococos e estafilococos coagulase positiva em leite cru foi realizada de acordo com o preconizado na Instrução Normativa n.°62 (BRASIL, 2003)
Summary
Amostras de 200 mL de leite cru foram coletadas assepticamente em frascos de vidro esterilizados de cada bovino em lactação de uma unidade produtora de leite do município de Rio Pomba, totalizando 47 amostras durante os meses de setembro de 2011 a fevereiro de 2012. Imediatamente após a coleta, as amostras foram refrigeradas e encaminhadas para o Laboratório de Microbiologia de Alimentos do Departamento de Ciência e Tecnologia de Alimentos do Instituto Federal de Educação, Ciência e Tecnologia do Sudeste de Minas Gerais (IF Sudeste MG), Campus Rio Pomba para análises
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