Environmental Mastitis
نویسنده
چکیده
Mastitis is the more economically important disease in dairy herds. Costs originated by this disease are not only those related to lost of milk production, treatment of sick animals or culled cows, but also those related with the prevention of this disease. Intramammary infections (IMI) are most of the times caused by infection with bacterial pathogens that could be divided into contagious or environmental pathogens. The first of these are characterize to cause cow to cow infections mainly through contaminated milking equipment, milker hands, or cloths used to clean and wipe udders. In this group, Staphylococcus aureus, Streptococcus agalactiae and Mycoplasmas spp. are the main organisms. Environmental pathogens are those that live in the cow's environment and include environmental streptococci (Streptococcus uberis and S. dysgalactiae) and coliforms (Escherichia coli). These two bacterial groups account for more than the 80% of environmental mastitis.
منابع مشابه
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To analyze the effects of some environmental factors such as herd, year, season of calving, stage of lactation on mastitis incidence, a total of 101147 monthly test day somatic cell counts collected from 13977 Iranian Holstein heifers calved between 2002 and 2006 in 183 herds were used. The event of mastitis in cows was coded as 1 if their somatic cell count at specific test day was greater tha...
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