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SPORE FORMING BACTERIA ISOLATED FROM STERILIZED MILK IN MOSUL MILK PLANT | ||
| Mesopotamia Journal of Agriculture | ||
| Article 15, Volume 33, Issue 3, 2005, Pages 99-102 PDF (0 K) | ||
| DOI: 10.33899/magrj.2005.35828 | ||
| Author | ||
| F.O. Mohammed | ||
| Abstract | ||
| This study was performed to detect the spore forming bacteria that frequently represent the major bacteria in sterilized milk that might cause milk deterioration. A total of 46 isolates were noticed in sterilized milk produced by the Mosul milk plant through a period of four months (July, August, September and October). These isolated bacteria all belonged to the genus Bacillus which included B.subtilis, B.circulans, B.licheniformis and B.megaterium that represented 52,23,15 and 8% , respectively. The influence of storing process for 4 weeks at 35°C on the number of spores and upon the ratio of deteriorated sterilized milk samples revealed that the number of spores increased upon the increase in storage time and ranged from 3-97 spores/ml. and it was also noticed that the percentage of deteriorated milk samples were relatively high, 5% during the third week of storage in August followed by another 5% the next week. While during September, the deterioration took place through the fourth week and had 10% of the stored bottles, whereas no deterioration was observed through both July and October. The acidity levels of sterilized milk were within the normal, 0.18 – 0.23 % which leads to a conclusion that deterioration due to the proteolysis of milk proteins. | ||
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