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Abstract

Incidence of clinical and subclinical mastitis was studied in 2419 purebred and crossbred Holstein cows from 28 farms in São Paulo and Minas Gerais, Brazil. A total of 9527 quarters were examined. Percentage of quarters positive for clinical mastitis was 6.48%, 17.45% of cows having at least 1...

Author(s)
Costa, E. O. da; Melville, P. A.; Ribeiro, A. R.; Watanabe, E. T.; White, C. R.; Pardo, R. B.
Citation
Revista Brasileira de Medicina Veterinária, 1995, 17, 5, pp 215-217
Abstract

A survey was made on the aetiology of intramammary infections in dairy cattle in the states of São Paulo and Minas Gerais during 1992-1993. Animals from dairy farms of 19 counties were examined. Primiparous and multiparous cows in different stages of lactation and dry periods were evaluated. Milk...

Author(s)
Costa, E. O. da; Benites, N.; Carciofi, A. C.; Melville, P. A.; Prada, M. S.; Ribeiro, A. R.; Watanabe, E.
Publisher
Società Italiana di Buiatria, Bologna, Italy
Citation
Proceedings 18th World Buiatrics Congress: 26th Congress of the Italian Association of Buiatrics, Bologna, Italy, August 29-September 2, 1994. Volume 1., 1994, pp 825-828
Abstract

Sensitivity in vitro to 12 different antibiotics was studied in mastitis agents isolated from 3130 milk samples in 1992 and from 5696 milk samples in 1993 collected from cows with clinical and subclinical mastitis. Samples were cultured on blood agar at 37°C. Results showed an increase between 1992 ...

Author(s)
Costa, E. O. da; Melville, P. A.; Ribeiro, A. R.; Viani, F. C.; White, C. R.
Citation
Revista Brasileira de Medicina Veterinária, 1995, 17, 6, pp 260-263
Abstract

This study was conducted to evaluate the proportion of clinical mastitis occurrence in relation to subclinical mastitis and to correlate these data with the main aetiological agents in Brazilian dairy herds. The study was conducted during 5 years in 257 dairy herds located in São Paulo and Minas...

Author(s)
Costa, E. O.; Garino Júnior, F.; Watanabe, E. T.; Ribeiro, A. R.; Silva, J. A. B.
Publisher
Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, São Paulo, Brazil
Citation
Napgama, 2001, 4, 3, pp 10-13
Abstract

The purpose of this study was to determine the seasonality of the occurrence of environmental bovine mastitis in 70 dairy herds located in São Paulo and Minas Gerais, Brazil between 1997 and 2000. 11 125 milk samples from 4469 dairy cows were analysed. 509 (4.58%) cases of environmental mastitis...

Author(s)
Ribeiro, A. R.; Garino Júnior, F.; Silva, J. A. B.; Watanabe, E. T.; Valle, C. R.; Costa, E. O.
Publisher
Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, São Paulo, Brazil
Citation
Napgama, 2001, 4, 4, pp 10-14
Abstract

This study was conducted to evaluate the in vitro susceptibility of 50 E. coli strains isolated from mastitis cases in São Paulo and Minas Gerais, Brazil, to 17 antimicrobial agents, using the Kirby and BAUER diffusion tests. It was shown that there was a high resistance to penicillin (100%) and...

Author(s)
Garino Júnior, F.; Ribeiro, A. R.; Silva, J. A. B.; Ribeiro, M. G.; Costa, E. O.
Publisher
Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, São Paulo, Brazil
Citation
Napgama, 2000, 3, 2, pp 19-22
Abstract

Strip cup tests for mastitis were performed on 3574 cows, at different stages of lactation, from 28 herds in the States of São Paulo and Minas Gerais, Brazil. Of 13 718 tests performed 6.39% were positive. Samples of milk from infected quarters was collected aseptically, inoculated into blood agar...

Author(s)
Costa, E. O. da; Benites, N. R.; Melville, P. A.; Pardo, R. B.; Ribeiro, A. R.; Watanabe, E. T.
Citation
Revista Brasileira de Medicina Veterinária, 1995, 17, 4, pp 156-158
Abstract

In spite of several factors causing the number of somatic cell counts in milk to increase, the main factor is the increase in udder inflammatory processes, indicative of subclinical mastitis. Many values have been given for the normal cell count of milk; usually an uninfected mammary gland has a...

Author(s)
Costa, E. O.; Benites, N. R.; Thiers, F. O.; Ribeiro, A. R.; Garino Júnior, F.; Silva, J. A. B.
Publisher
Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, São Paulo, Brazil
Citation
Napgama, 2000, 3, 2, pp 14-18

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