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Journal of Medical Microbiology and Infectious Diseases، جلد ۵، شماره ۱، صفحات ۱۲-۱۶
عنوان فارسی
چکیده فارسی مقاله
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عنوان انگلیسی Isolation of Gram-positive Bacteria from Different Sources and Evaluation of their Probiotic Properties
چکیده انگلیسی مقاله Introduction: Probiotics are defined as live non-pathogenic microorganisms and if administered in adequate amounts, can have beneficial effects on their hosts. This study aimed to isolate Gram-positive bacteria from different sources and to evaluate their probiotic properties. Methods: We obtained five samples from various sources including yogurt, infant feces, cheese, and soil under aseptic methods. The samples were inoculated on MRS agar and M17 medium. Biochemical assays identified isolated bacteria. The probiotic effect of isolated bacteria was tested by applying acidic pH 2.0, 0.3% w/v bile salt concentration and gastric juice in the samples. The antibiotic susceptibility profiling and their antimicrobial effects against Escherichia coli, Staphylococcus aureus, Salmonella enterica and Pseudomonas aeruginosa, were determined. Results: Four Gram-positive bacteria including Lactobacillus acidophilus, Bifidobacterium bifidum, Lactococcus lactis and Bacillus subtilis were isolated from yogurt, infant feces, cheese, and soil, respectively. Except for B. subtilis, all the isolated bacteria were catalase-negative and non-motile. The results showed that viable count of L. acidophilus, B. bifidum, and L. lactis was significantly high (P< 0.05), and B. subtilis was sensitive. The isolates showed an antimicrobial effect against all indicator pathogens except P. aeruginosa. The isolated B. subtilis showed no antimicrobial effect. The antibiotic susceptibility was determined for ten different antibiotics. All the isolates were susceptible to most of the antibiotics (table 6) and resistant to penicillin G, gentamicin, vancomycin, and kanamycin. Conclusion: The species L. acidophilus, B. bifidum, and L. lactis fulfilled the criteria for probiotic properties and can be used in field conditions as probiotics.
کلیدواژه‌های انگلیسی مقاله Identification, Gram-Positive Bacteria, Probiotic
نویسندگان مقاله محمد فیصل شهباز اکرم | muhammad faisal shahbaz akram
institute of microbiology, university of agriculture, faisalabad, pakistan


محمد اشرف | muhammad ashraf
institute of microbiology, university of agriculture, faisalabad, pakistan


سلطان علی | sultan ali
institute of microbiology, university of agriculture, faisalabad, pakistan


سیده iqra کاظمی | syeda iqra kazmi
institute of microbiology, university of agriculture, faisalabad, pakistan
نشانی اینترنتی http://jommid.pasteur.ac.ir/browse.php?a_code=A-10-110-1&slc_lang=en&sid=en
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/350/article-350-569210.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Other
نوع مقاله منتشر شده Original article
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