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[Hibitan and Iosan SST in the prevention of subclinical mastitis in cows].

The effect was tested of the disinfection preparations hibitan and iozan SST under field conditions in the course of six months. The animals treated were included in two groups: group I--with 20 cows, and group II--with 39 cows. All animals were free of mastitis-causing agents. The udder of the animals in the first was disinfected with hibitan-super-concentrate (7.5 per cent chlorhexidin gluconate). Prior to milking the udder was washed with a 0.12 per cent solution. After milking the teats were disinfected with a hibitan cream. The udder of the animals of the second group was disinfected with iozan SST (17.6 per cent tensit-iodo-iodide complex). Prior to milking the udder was washed a 0.5 per cent solution, and the teats after milking were disinfected with a 33 per cent iozan SST solution. It was found that the washing of the udder and teats as indicated above in the course of 6 months rules out the outbreak of the infectious subclinical mastitits in cows. It is suggested to adopt the use of the two preparations to prevent mastitis in field and farm practice.