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The aim of this study was to assess prevalence of three main diseases related to dairy production in urban cattle herds: brucellosis, tuberculosis and mastitis. Serum samples collected from 290 bovines have been tested for brucellosis using antigen buffered test. A global prevalence of 13.2 % has been observed, and the females were significantly (p < 0.05) more infected than the males (14.3 % vs 5.6 %). Simple IntraDermoTuberculination (IDT) test with the PPD tuberculin was used on 325 cows. The global prevalence of the infection was 27.7 %, with a very high significant variation (p < 0.001) between 2 years old animals and those over 6 years. From 98 individual milk samples submitted to California Mastitis Test (CMT), mean cellular concentration was 5385. 103 ± 1061.103 TCN/ml. The prevalence of the three studied diseases is important enough to retain the attention of farmers, as well as technical and city authorities. This is particularly the case for tuberculosis and brucellosis which are major zoonosis and which can seriously damage consumer health.

Factores determinantes del grado de información medioambiental divulgada en las grandes empresas que operan en Portugal: un análisis univariante