Seasonal contamination of milk with butyric bacteria

Sezonska kontaminacija mlijeka bakterijama buteme kiseline istraživana je u uzorcima zbirnog sirovog mlijeka u toku tri godine 1987.-1989. Utvrđeno je da je mlijeko proizvedeno u ljetnoj sezoni (april-septembar) značajno manje kontaminirano nego mlijeko proizvedeno u zimskoj sezoni (oktobar-mart). Broj spora se u mlijeku ljetne sezone kretao od 0 do 200, u prošeku 67 spora/l. Spore nisu uopće nađene u 48% analiziranih uzoraka iz ljetnog perioda. Samo oko 34% uzoraka mlijeka iz zimske sezone je imalo manje od 2000 spora/l. Sve ostalo mlijeko, oko 66%, bilo je kontaminirano velikim brojem spora i uopće nije bilo pogodno za izradu sireva.Seasonal contamination of milk with Butyric Bacteria was examinated in bulk milk over three years, 1987-1989. It was found that milk produced in summer season (April-September) was considerably less contaminated than milk of winter season (October-March). Spore counts in summer milk were varying from 0 to 200, mean 67 per liter, and in winter milk from 700 to 70.000, mean 12.665 spores per liter. Spores have not been detected in 48% analyzed samples of summer milk. Only about 34% samples of winter milk had less than 2.000 spores per liter. About 66% of samples contained higher number of spores and were unsuitable for cheesemaking