LB bovine milk microbial contamination evaluation by researching their genetic origin | Latvijas Brūnās šķirnes govju piena mikrobiālās piesārņotības vērtējums pēc to ģenētiskās izcelsmes
2010
Dujina, I., Latvia Univ. of Agriculture, Sigulda (Latvia). Research Inst. of Biotechnology and Veterinary Medicine Sigra | Jemeljanovs, A., Latvia Univ. of Agriculture, Sigulda (Latvia). Research Inst. of Biotechnology and Veterinary Medicine Sigra | Konosonoka, I.H., Latvia Univ. of Agriculture, Sigulda (Latvia). Research Inst. of Biotechnology and Veterinary Medicine Sigra
The most important target in dairy husbandry in the world is to harvest high quality, unpolluted milk. The most important measure in cultivation of dairy cow herd is to choose the correct genotypic and phenotypic brood stock for crossing. The aim of the research work is to analyze the fresh milk of different bulls' daughters, to find cows the effects of cows' genetic predisposition on microbial contamination, and somatic cell count (SCC) in milk. We can find in literature describing increasing resistance to some diseases like leukemia, tuberculosis, brucellosis, mastitis, foot disorders. This indicates that the genetic resistance and the animal's genetic immunity to diseases is found. Experimental work was carried in breed Latvijas Brūnās (LB) dairy cows shed which belongs to SIA Palsa and is situated in civil parish Varini, Smiltene County in year 2008/2009. It is compared seven different bulls daughters microbial contamination of fresh milk and SCC. Comparing SCC samples between the lines of bull daughters researching average value of the uniformity of dispersion analysis, observed that the SCC was statistically significantly different (F = 2.1, p is greater than 0.05) in different lines of bull daughters. But at the same housing and feeding conditions in two breeding bulls daughter groups drastically changed the common bacteria and coagulase negative number of bacteria in raw milk, indicating the resistance of different cows, after assessing the genetic background.
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