PREVALENCE OF INTRAMAMMARY INFECTIONS DURING THE DRY PERIOD IN ARGENTINA

摘要

The therapy for dry cows has mainly two objectives: eliminate existing infections at dry off, and prevent the incidence of new infections during the dry period. It is well known that the elimination of the pre-existing intramammary infections (IMI) turns to be less important with the amount of animals infected when the percentage of animals infected with contagious pathogens is reduced. In the last years it has been noted in our country an increase of cases of clinical mastitis in cows that have just given birth caused by environmental pathogens (coliforms and Strep, non ag). The objective of this paper is to evaluate the prevalence of new IMI in cows and heifers at beginning of lactation.