Fluxo de leite, morfometria de tetos e a prevalência de mastite subclínica em vacas Gir

Marco Aurélio de Felicio Porcionato; Weber Vilas Boas Soares; Carolina Barbosa Malek dos Reis; Cristina Simões Cortinhas; Lucinéia Mestieri; Marcos Veiga dos Santos

doi:10.1590/S1678-3921.pab2010.v45.8778

Authors

Marco Aurélio de Felicio Porcionato Universidade de São Paulo
Weber Vilas Boas Soares Agência de Tecnologia dos Agronegócios
Carolina Barbosa Malek dos Reis Universidade de São Paulo
Cristina Simões Cortinhas Universidade de São Paulo
Lucinéia Mestieri Universidade de São Paulo
Marcos Veiga dos Santos Universidade de São Paulo

DOI:

https://doi.org/10.1590/S1678-3921.pab2010.v45.8778

Keywords:

Gir, lactation, mammary gland, milking, morphology

Abstract

The aim of this work was to evaluate the association between milk flow, teat morphological measurements and subclinical mastitis prevalence in Gir cows. Eighty cows in the 2^nd and 3^rdlactations, with 90 to 200 days of lactation, were divided according to milk flow during milking into fast or slow groups. Teat morphometry was assessed by ultrasound scanning of the right anterior teat and external measurements. Milk samples were collected for somatic cells count (SCC) and microbiological culture. The association of morphometry and external measurements of the teats with the SCC and microorganisms found in milk were analysed. Milk flow was significantly correlated to milk production. Gir cows with slower milk flow had longer teat canal and greater milk yield, in comparison to cows with fast milk flow. Teat-end to floor distance influenced SCC of Gir cows. Prevalence of subclinical mastitis and the type of mastitis-causing pathogens were not affected by milk flow during milking.