DISTRIBUTION AND DETERMINANTS OF LISTERIA SPP. AMONG SURFACE WATER SAMPLESV.J. AJAY KUMAR*, C. LATHA, B. SUNIL, V.L. GLEEJA AND V.R. DHANYAAbstract Surface water samples (n-328) from different districts of Kerala, India were screened for the presence of Listeria organisms. The organisms were identified up to species level by biochemical tests and pathogenesity assays. The results were confirmed using a commercial lateral flow assay kit. Nine isolates of Listeria were obtained which included L. innocua (seven isolates), L. grayi and L. ivanovii (One isolate each). The pH and Chemical oxygen demand (COD) of the water samples were also assessed. The pH of the samples ranged from 5.2 to 8.9 with an average of 7.10 + 0.0323. The COD ranged between 3 mg/L to 4554 mg/L. On statistical analysis using regression correlation analysis, it was found that the presence of Listeria had significant correlation with COD of the water samples (P<0.01).
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