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. 2013 Feb;81(2):531–541. doi: 10.1128/IAI.00982-12

Table 1.

Abundance of chxA (cholix toxin) gene among Vibrio cholerae strains used in this study

Serogroup Country Source No. of strains Presence or absencea of chxA
O1 (n = 485) India Clinical 260
India Environmental 208
Brazil Clinical 10
Bangladesh Clinical 4
Peru Clinical 3
O139 (n = 84) India Clinical 61
Bangladesh Clinical 23
Non-O1/non-O139 (n = 196) India Clinical 64
India Clinical 18 +
India Environmental 79
India Environmental 35 +
Total 765 53
a

−, absence; +, presence.