| molecular characterization of vibrio cholerae o139 bengal isolated from water and the aquatic plant eichhornia crassipes in the river ganga, varanasi, india. | a collection of ten strains of vibrio cholerae o139, comprising six isolates from eichhornia crassipes, two from water of the river ganga, and one each from a well and a hand pump, were characterized. all the strains carried the ctx genetic element (ctxa, zot, and ace) except for the st gene and carried structural and regulatory genes for toxin-coregulated pilus (tcpa, tcpi, and toxr), adherence factor (ompu), and accessory colonization factor (acfb); all produced cholera toxin (ct). these strai ... | 2003 | 12676727 |