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http://dx.doi.org/10.5187/JAST.2006.48.6.907

Inhibition Activity Against Pathogenic Organism of Probiotic Bacteria and Characterization of Inhibition Activity of Isolated Bacteria from Calf Dejecta  

배임희 (Department of Animal Science & Technology, College of Industrial Sciences, Chung-Ang University)
변정열 (Department of Animal Science & Technology, College of Industrial Sciences, Chung-Ang University)
배귀석 (Department of Animal Science & Technology, College of Industrial Sciences, Chung-Ang University)
이상석 (Department of Animal Science, Sunchon National University)
장문백 (Department of Animal Science & Technology, College of Industrial Sciences, Chung-Ang University)
윤영호 (Department of Animal Science & Technology, College of Industrial Sciences, Chung-Ang University)
Publication Information
Journal of Animal Science and Technology / v.48, no.6, 2006 , pp. 907-920 More about this Journal
Abstract
This study was conducted to investigate the inhibitory activity of Lactobacillus spp., Bacillus ssp., and calf fecal isolates against pathogenic Salmonella typhimurium, E. coli, Listeria monocytogenes, and Staphylococcus aureus. Among thirteen strains of Lactobacillus ssp. tested, Lactobacillus helveticus CU631 showed the highest inhibition against three pathogens, whereas Bacillus spp. showed a weak inhibitory activity. Four calf fecal isolates were identified as Lactobacillus pentosus CU13, CU05, Pediococcus pentosaceus CUR02, and Lactobacillus lactis ssp. lactis CUM14. The whole cell and cell wall components of L. rhamnosus CU02 and L. pentosus CU13 were active in the inhibition of L. monocytogenes. The medium components and levels, which affect on the inhibitory activity, were revealed as Tween 80 1.0%, peptone 3.0%, yeast extract 3.0%, glucose 3.0%, beef extract 3.0%, and NaCl 1.0～3.0%, respectively. Inhibitory activity of the supernatant culture medium was not affected by catalase and proteinase K treatment but affected by heat treatment at 80℃ and netralization, which implies that the inhibitory activity is due to the production of organic acids during the growth. L. pentosus CU13 and L. rhamnosus CU02 exhibited broad inhibition spectrum against 16 out of 21 strains including some pathogens. Oral administration of L. rhamnosus CU02 to the mice infected with E. coli O157:H7 was proven to be effective to recover their body weight during the experimental period.
Keywords
Inhibition activity Lactobacillus spp.; Bacillus spp.; calf dejecta isolates; Escherichia coli O157:H7
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