Control of subclinical mastitis in lactating cows, using intramammary antibiotics

Pedraza, G.C.; Maza, L.E. de la; Alegria, R.G.; Zurich, Z.L.

Agricultura Tecnica 46(3): 277-282


Quarters from Holstein-Friesian cows with CMT graded 2 and 3 were not treated (controls) or treated at successive milkings with 2 or 4 intramammary infusions of cloxacillin and chloramphenicol (equiv. to 1 g of antibiotic) in a 2 x 3 factorial experiment with 25 udders per treatment group. Milk samples were taken 1 and 4 wk after the final application of antibiotics.