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Characterization of Lipolytic Producing Proteus and Klebsiella Strains Isolated from Fermented Foods


Paper Type 
Contributed Paper
Title 
Characterization of Lipolytic Producing Proteus and Klebsiella Strains Isolated from Fermented Foods
Author 
Somboon Tanasupawat* [a], Mukkharin Phoottosavako [b] and Suwimon Keeratipibul [b]
Email 
Somboon.T@chula.ac.th
Abstract:
The aim of this research was to characterize the lipolytic producing Gram-negative, facultatively anaerobic, rod-shaped bacteria isolated from fermented foods collected in ThailandAll isolates were  identified based on their phenotypic characteristics and 16S rRNA gene sequence analyses. Nine isolates (Group 1)  belonged to the genus Proteus and one in Group 2 was Klebsiella based on 16S rRNA gene sequence similarity. The isolates in Group 1  (NM3-7, PR10-2, PR10-3, PR11-3, PR11-4, PR12-2, NM28-1, NM42-8 and NM42-10) were closely related to Proteus mirabilis ATCC 29906T with 99.78-100% similarity. Isolate NM42-1 in Group 2 was closely related to Klebsiella ozaenae ATCC 11296 T with 99.85% similarity. The isolates were sensitive to  carbenicillin, imipenem, novobiocin, penicillin G, streptomycin, sulphoanmides, ampicillin, cephalothin, gentamicin, kanamycin and tobramycin, but they were resistant to bacitracin,  clindamycin, erythromycin, tetracycline and vancomycin. Proteus isolates showed lipolytic activity for Tween 20, Tween 40, Tween 60 or Tween 80 ranging from 0.10±0.02-0.57±0.00 U/mL, whereas Klebsiella isolate exhibited  0.10±0.02 -0.24±0.04 U/mL. P. mirabilis PR11-3 exhibited the highest activity on Tween 80 at pH 8.0 when incubated for 18 h.
Start & End Page 
1007 - 1015
Received Date 
2014-09-19
Revised Date 
Accepted Date 
2015-01-06
Full Text 
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Correspondence & Author Name 
Somboon Tanasupawat*,
Keyword 
Antibiotic sensitivity, fermented foods, Klebsiella, Proteus, lipolytic activity
Volume 
Vol.43 No.5 (OCTOBER 2016)
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Chiang Mai Journal of Science

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