Fig. 4From: Toxigenic Vibrio cholerae O1 in vegetables and fish raised in wastewater irrigated fields and stabilization ponds during a non-cholera outbreak period in Morogoro, Tanzania: an environmental health studyCholera haemolysin gene (hlyA) detected in fish isolates using PCR at 727 bp. LD DNA ladder, lane 1 to 6 are V. cholerae DNA samples, NC negative control, PC positive controlBack to article page