The Effect of pH and Temperature on Motility of Listeria SpeciesSyed M. Khalid, Shakeel A. Khan, Roquya SiddiquiFrom Department of Microbiology, University of Karachi, Karachi- 75270, Pakistan.
The effect of pH of the medium and temperature of incubation was studied on motility of four strains of 2 Listeria species. All the strains were found to be non-motile at pH 4. The motility was observed at a pH range of 5.5 to 9.0. However, the optimum pH and temperature for motility was 7.0 and 22°C respectively. The strains NCTC 7973 and C-274 were, however, motile at pH 5.0. At pH 10, NCTC 5214 m, C-274 and NCTC 7973 were motile at 22°C with the exception of C-274 which was motile also at 35°C. NCTC 5214 m was motile at pH 11 only at 22°C whereas C-274 was motile at both 22 and 35°C. Keywords: Listeria, pH, temperature
Syed M. Khalid, Shakeel A. Khan, Roquya Siddiqui. The Effect of pH and Temperature on Motility of Listeria Species. Med J Islamic World Acad Sci. 1992; 5(1): 28-31
Corresponding Author: Syed M. Khalid, Pakistan |
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