RESUMO
Milk is considered one of the finest food because its composition presents several important elements for human nutrition, but problems with animal health, such as mastitis, leads to the decrease in its production and quality. Mastitis is a bovine udder disease that has been the cause of low productivity and offers potential risk to the animals health. Therefore, attention to the sanitary control of animals is very important. This study aimed to evaluate the milk microbiological quality of cows from a herd which is-composed of breed mixed /Jersey. Milk samples were collected fortnight in February and March of 2011, in 15 lactating cows that exhibited a herds profile. Each collection totaled 60 samples and a total of 240 samples were obtained in the period. The samples were collected individually in sterile test tubes, previously identified with animals name and number and mammary quarter. The teats were individually washed with water, dried with disposable paper and then dipped within antiseptic solution of iodine alcohol. The material was packed in insulated box material provided with ice cubes and taken to the laboratory for bacterial isolation and identification. The isolation and identification of strains were performed at Laboratory of the Milk Quality, in Instituto de Zootecnia. From 240 milk samples, 101 (42.08%) were infected and the microorganisms found and its prev
ês.
RESUMO
The concern in milk quality, milk production, and in animals welfare is in constant increase. Mastitis is recognized as the main disease affecting dairy animals because of changing in milk composition and reduction in milk production. In Brazil, the highest incidence of mastitis is related to infectious agents. This study aimed to investigate the incidence of pathogenic microorganisms in milk produced by 60 cows from four dairy farms (15 cows/farm) located at Sao Paulo state, Brazil. Milk samples from each teat were collected fortnight in sterile tubes, previously identified, during two months. In each herd 240 samples were obtained, except on the farm A, where an extra collection was done, in a total amount of 300 samples. On the farm A, the sampling was done in a period of transition between the dry and rainy season. On the farm B, samples were collected mostly in the season of high temperatures. On the farm C the collections were made over a period of heat and humidity. On the farm D, on a period of warmer temperatures and reduced rainfall. The isolation and identification of microorganisms were conducted at Laboratory of Milk Quality from Instituto de Zootecnia, Nova Odessa, São Paulo, Brazil. Aliquots of 100 mL of milk were grown on plates with 5% sheep blood agar. After incubation, they were used for the production of catalase and Gram stain. Gram positive and catalase p
O artigo não apresenta resumo em português.
RESUMO
The concern in milk quality, milk production, and in animals welfare is in constant increase. Mastitis is recognized as the main disease affecting dairy animals because of changing in milk composition and reduction in milk production. In Brazil, the highest incidence of mastitis is related to infectious agents. This study aimed to investigate the incidence of pathogenic microorganisms in milk produced by 60 cows from four dairy farms (15 cows/farm) located at Sao Paulo state, Brazil. Milk samples from each teat were collected fortnight in sterile tubes, previously identified, during two months. In each herd 240 samples were obtained, except on the farm A, where an extra collection was done, in a total amount of 300 samples. On the farm A, the sampling was done in a period of transition between the dry and rainy season. On the farm B, samples were collected mostly in the season of high temperatures. On the farm C the collections were made over a period of heat and humidity. On the farm D, on a period of warmer temperatures and reduced rainfall. The isolation and identification of microorganisms were conducted at Laboratory of Milk Quality from Instituto de Zootecnia, Nova Odessa, São Paulo, Brazil. Aliquots of 100 mL of milk were grown on plates with 5% sheep blood agar. After incubation, they were used for the production of catalase and Gram stain. Gram positive and catalase p
O artigo não apresenta resumo em português.
RESUMO
Milk is considered one of the finest food because its composition presents several important elements for human nutrition, but problems with animal health, such as mastitis, leads to the decrease in its production and quality. Mastitis is a bovine udder disease that has been the cause of low productivity and offers potential risk to the animals health. Therefore, attention to the sanitary control of animals is very important. This study aimed to evaluate the milk microbiological quality of cows from a herd which is-composed of breed mixed /Jersey. Milk samples were collected fortnight in February and March of 2011, in 15 lactating cows that exhibited a herds profile. Each collection totaled 60 samples and a total of 240 samples were obtained in the period. The samples were collected individually in sterile test tubes, previously identified with animals name and number and mammary quarter. The teats were individually washed with water, dried with disposable paper and then dipped within antiseptic solution of iodine alcohol. The material was packed in insulated box material provided with ice cubes and taken to the laboratory for bacterial isolation and identification. The isolation and identification of strains were performed at Laboratory of the Milk Quality, in Instituto de Zootecnia. From 240 milk samples, 101 (42.08%) were infected and the microorganisms found and its prev
ês.