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OJVRTM
Online Journal of Veterinary Research©
Volume 10 (2):134-144, 2006. Extensively redacted 2018..
Antimicrobial probiotic effects of selected
avian intestinal lactic acid bacteria.
SUMMARY
Mojgani
N, Torshizi M, Molae M., Probiotic potential of Avian Intestinal
Lactic Acid Bacteria Onl
J Vet Res., 10 (2):134-145, 2006. A
total of 250 chicken intestinal specimens were screened for Lactic Acid
Bacteria (LAB) by routine cultural, morphological and biochemical reactions.
Seventy five were identified and characterized for probiotic activity. Lactobacillus acidophilus RNL26, Lactobacillus fermentum
RNL 44 and Lactobacillus salivarrius RNL 49T were resistant to acidic pH and
high bile salt concentrations. The strains inhibited gram positive Clostridium perfringens, Staphylococcus aureus and
Listeria monocytogenes. Only L. fermentum RNL 44 inhibited gram negative Salmonella enteritidis and S. typhimurium.
Because neutralized and catalase treated supernatant fluid from L. acidophilus RNL26 and L. salivarrius RNL 49 retained antibacterial activity, we surmise
that bacteriocin was responsible for antimicrobial
effects. We conclude that
although the strains of LAB survived acidic conditions and bile
concentration to variable extent, only L. acidophilus RNL 26, L. fermentum RNL 44 and L.
salivarrius RNL 49 could be considered as
potential ingredients for a chicken probiotic feed formulation. Results of our In vitro study with LAB strains should be confirmed In vivo. The strains were characterized in vitro for cholesterol removal, aggregation, co-aggregation,
and cell surface hydrophobicity.
Key Words: Lactic Acid Bacteria, In vitro, Antimicrobial, Poultry, Probiotic.
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