CHARACTERIZATION OF SOME PROBIOTIC PROPERTIES OF LACTOBACILLUS GASSERI MA-1 FROM HUMAN MILK
Abstract
Human milk is a source of various lactic acid bacteria with the potential of probiotics. The aim of this study was to screen in vitro some probiotic properties of Lactobacillus gasseri MA-1 originated from human milk. The strain showed γ-hemolytic activity (no hemolytic activity) and susceptibility to Chloramphenicol, Cloxacillin and Penicillin G antibiotics. MA-1 with safety properties also exhibited a good tolerance to pH 2 and 0.3% bile conditions. L. gasseri MA-1 showed high ability of auto-aggregation (97%). The co-aggregation activities the strain with five human (Listeria monocytogenes ATCC 7644, Escherichia coli ATCC 35218, Salmonella enteritidis ATCC 13076, Escherichia coli O157:H7 and Salmonella enteritidis RSKK 171) and two fish (Streptococcus agalactiae and Vibrio alginolyticus) originated bacteria varied from 45% to 57%. The results indicated that, L. gasseri MA-1 strain could be a promising candidate for probiotic products.
Keywords
human breast milk, tolerance to gastrointestinal condition, auto-aggregation, co-aggregation
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