RATIONAL EVALUATION OF ANTIMICROBIAL PROPERTIES OF LACTOBACILLI ISOLATES AGAINST SOME PATHOGENIC MICROORGANISMS: A NEW METHOD COMPARING THE SUSCEPTIBILITY OF INDICATOR MICROORGANISMS

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MALEKI H.; MISAGHI A.; AMINI M.; SAIDI A.; AKBARI NOGHABI K.

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Journal: Iranian Journal of Veterinary Medicine Year:2013 | Volume:7 | Issue:4 Page(s): 243-252

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Title

RATIONAL EVALUATION OF ANTIMICROBIAL PROPERTIES OF LACTOBACILLI ISOLATES AGAINST SOME PATHOGENIC MICROORGANISMS: A NEW METHOD COMPARING THE SUSCEPTIBILITY OF INDICATOR MICROORGANISMS

Author(s)

Keywords

ASPERGILLUS PARASITICUSQ2

CANDIDA PARAPSILOSISQ2

DATA ORGANIZATION METHODQ2

ESCHERICHIA COLI O157:H7Q2

LISTERIA MONOCYTOGENESQ2

Abstract

BACKGROUND: Lactobacilli are known as a valuable source of antimicrobial compounds and have a high potential of use in food biopreservation against food related microorganisms.OBJECTIVES: Antimicrobial potency of 63 dairy lactobacilli isolates against four highly important food-related microorganisms were evaluated. In addition, a new way in data organization was introduced, which led to a more informative and rational comparison of indicator microorganisms' susceptibilities to a set of compounds. Correlation of pH and antimicrobial properties was investigated.METHODS: Microbroth dilution assay was used to evaluate indicator microorganisms' susceptibility to lactobacilli CFCS (cell free culture supernatant). Results were organized by both the conventional way - demonstrating the minimum inhibitory and lethal concentrations of CFCS - and a new suggested method, representing comparative effectiveness of each CFCS specimen against indicator microorganisms of comparison interest.RESULTS: Susceptibilities of tested strains were in the following order: Escherichia coli O157: H7>Listeria monocytogenes>ASPERGILLUS PARASITICUS>Candida parapsilosis. Despite the high susceptibility of L. monocytogenes, it showed the highest resistance to death among the tested microorganisms.Eefficiency of Lactobacilli CFCS in killing the tested strains showed the following susceptibility order: E. coli O157: H7>A. parasiticus>C. parapsilosis>L. monocytogenes. Antimicrobial property was in correlation with the pH value of CFCS. PH had a pronounced impact on susceptibilities of C. parapsilosis and E. coliin pH values of concentrated CFCS lower than 4 and 4.5, respectively.CONCLUSIONS: Potency of lactobacilli isolates in growth inhibition of the indicator microorganisms was found promising, and the suggested DATA ORGANIZATION METHOD provided additional information, leading to more precise comparison of indicator microorganisms.

Cites

INHIBITORY POTENTIAL OF METABOLITES FROM LACTOBACILLUS CASEI AGAINST PHENOTYPIC CHARACTERISTICS OF SALMONELLA TYPHIMURIUM LT2

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APA: Copy

MALEKI, H., MISAGHI, A., AMINI, M., SAIDI, A., & AKBARI NOGHABI, K.. (2013). RATIONAL EVALUATION OF ANTIMICROBIAL PROPERTIES OF LACTOBACILLI ISOLATES AGAINST SOME PATHOGENIC MICROORGANISMS: A NEW METHOD COMPARING THE SUSCEPTIBILITY OF INDICATOR MICROORGANISMS. IRANIAN JOURNAL OF VETERINARY MEDICINE (INTERNATIONAL JOURNAL OF VETERINARY RESEARCH), 7(4), 243-252. SID. https://sid.ir/paper/157899/en

Vancouver: Copy

MALEKI H., MISAGHI A., AMINI M., SAIDI A., AKBARI NOGHABI K.. RATIONAL EVALUATION OF ANTIMICROBIAL PROPERTIES OF LACTOBACILLI ISOLATES AGAINST SOME PATHOGENIC MICROORGANISMS: A NEW METHOD COMPARING THE SUSCEPTIBILITY OF INDICATOR MICROORGANISMS. IRANIAN JOURNAL OF VETERINARY MEDICINE (INTERNATIONAL JOURNAL OF VETERINARY RESEARCH)[Internet]. 2013;7(4):243-252. Available from: https://sid.ir/paper/157899/en

IEEE: Copy

H. MALEKI, A. MISAGHI, M. AMINI, A. SAIDI, and K. AKBARI NOGHABI, “RATIONAL EVALUATION OF ANTIMICROBIAL PROPERTIES OF LACTOBACILLI ISOLATES AGAINST SOME PATHOGENIC MICROORGANISMS: A NEW METHOD COMPARING THE SUSCEPTIBILITY OF INDICATOR MICROORGANISMS,” IRANIAN JOURNAL OF VETERINARY MEDICINE (INTERNATIONAL JOURNAL OF VETERINARY RESEARCH), vol. 7, no. 4, pp. 243–252, 2013, [Online]. Available: https://sid.ir/paper/157899/en

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