Article Abstract

Volume 30, No. (2), 2020 (April)
IN VITRO CHARACTERIZATION OF PROBIOTIC PROPERTIES AND ANTI-CAMPYLOBACTER ACTIVITY OF LACTOBACILLUS SPP. ISOLATED FROM POULTRY, FERMENTED FOODS AND HUMAN FAECES
M. Khan1,2, *A. A. Anjum1, M. Nawaz1 and A. R. Awan3

1Department of Microbiology, University of Veterinary and Animal Sciences, Lahore, Pakistan
2Department of Microbiology, Faculty of Life Sciences, University of Central Punjab, Lahore
3Institute of Biochemistry and Biotechnology, University of Veterinary and Animal Sciences, Lahore, Pakistan

Corresponding Author: aftab.anjum@uvas.edu.pk
Page Number(s): 336-344
Published Online First: March 02, 2020
Publication Date: March 02, 2020
ABSTRACT

The aim of the present study was to isolate and characteriz­e indigenous lactobacilli targeting inhibition of Campylobacter jejuni. Lactobacilli (n=150) were isolated from poultry droppings (62), fermented foods (yogurt and pickles) (78) and human faeces (10). Selected isolates were identified to specie level by amplifying and sequencing their 16SrDNA universal primers.  All isolates were screened for their anti-Campylobacter activity by well diffusion assay. Out of 150, 07 isolates (PL22, PL53, PL120, PL135, PL141, PL145 and PL149) had stable anti-Campylobacter activity at pH 7. Selected isolates (n=08) were further characterized for their tolerance to low pH and bile salts, antibiotic susceptibility, auto-aggregation and co-aggregation properties. All selected isolates had significant tolerance to low pH (>50% survival at pH 3), bile salts (0.3%), auto-aggregation and co-aggregation properties. Selected isolates were had no acquired resistance to penicillin, tetracycline, ampicillin and erythromycin. PL53, PL120 and PL149 showed significantly higher (p<0.05) reduction (> 3 log10) of Campylobacter jejuni ATCC 33291 in broth culture. It is concluded that L. gallinarum PL53, L. paracasei PL120 and L. gallinarum PL149 have probiotic properties and anti-campylobacter activity.

Keywords: Probiotics, Lactobacillus, Campylobacter, pH tolerance, antimicrobial activity

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Journal Impact Factor: 0.5 | (JCR Year: 2025) | Cite Score: 1.3

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Print ISSN: 1018-7081

Electronic ISSN: 2309-8694

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