THE INHIBITORY EFFECT OF ISOLATED LACTOBACILLI FROM INFANT FECES ON SOME ENTERIC PATHOGENS

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NOUROUZI JAMILEH; KARGAR MOHAMMAD; RAZEGHI R.

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Journal: HAKIM RESEARCH JOURNAL Year:2005 | Volume:7 | Issue:4 Page(s): 31-39

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Title

THE INHIBITORY EFFECT OF ISOLATED LACTOBACILLI FROM INFANT FECES ON SOME ENTERIC PATHOGENS

Author(s)

NOUROUZI JAMILEH | KARGAR MOHAMMAD | RAZEGHI R. | Issue Writer Certificate

Keywords

LACTOBACILLUSQ4

INFANTFECESQ4

INHIBITORY EFFECTQ4

Abstract

Introduction: Lactobacilli are the most frequent normal microflora in human's gastrointestinal tract and found in feces. The aim of this study was to isolate lactobacilli from feces of children aged between 6 to 24 months who were breast-fed, formula-fed or both and determine their INHIBITORY EFFECT on enteric pathogens (E. coli, Salmonella, Shigella). Methods: Samples from 100 infant feces were collected and cultured on MRS medium. Lactobacilli were isolated and identified by standard methods (morphology, microscopic shape, fermentation of carbohydrates and biochemical tests). The growth of isolated bacteria at different temperature, pH and the INHIBITORY EFFECT by spot on the lawn, blank disk and well diffusion on enteric pathogens (E. coli, Salmonella, Shigella), resistance to common antibiotics and bile were examined. Results: The isolated bacteria were L. fermentum, L. plantarum, L. rhamnosus, L. gasseri, L. reuteri, L. crispatus, and L. acidophilus. About 67% of lactobacilli were isolated from breast-fed children, 18.75% from formula-fed children and 13. 75% from breast and formula-fed children at the same time. Conclusion: Our results show that the number of lactobacilli in the feces of breast- fed children is predominant. It may be substances in breast milk that help better growth of lactobacilli and by producing more inhibitory substances can change the entric pH that inhibit the growth and prevent the incidence of disease such as diarrhea. Hence, breast feeding is recommended. On the other hand, the INHIBITORY EFFECT of substances from isolated lactobacilli from infant feces with breast - fed children was stable at low pH, high temperature, different concentration of bile salts, so, they might be considered as probiotic bacteria.

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APA: Copy

NOUROUZI, JAMILEH, KARGAR, MOHAMMAD, & RAZEGHI, R.. (2005). THE INHIBITORY EFFECT OF ISOLATED LACTOBACILLI FROM INFANT FECES ON SOME ENTERIC PATHOGENS. HAKIM RESEARCH JOURNAL, 7(4), 31-39. SID. https://sid.ir/paper/29554/en

Vancouver: Copy

NOUROUZI JAMILEH, KARGAR MOHAMMAD, RAZEGHI R.. THE INHIBITORY EFFECT OF ISOLATED LACTOBACILLI FROM INFANT FECES ON SOME ENTERIC PATHOGENS. HAKIM RESEARCH JOURNAL[Internet]. 2005;7(4):31-39. Available from: https://sid.ir/paper/29554/en

IEEE: Copy

JAMILEH NOUROUZI, MOHAMMAD KARGAR, and R. RAZEGHI, “THE INHIBITORY EFFECT OF ISOLATED LACTOBACILLI FROM INFANT FECES ON SOME ENTERIC PATHOGENS,” HAKIM RESEARCH JOURNAL, vol. 7, no. 4, pp. 31–39, 2005, [Online]. Available: https://sid.ir/paper/29554/en

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