Prevalence of antibodies reactive to P. vivax coiled coil fragments in volunteers from PNG and Colombia.

aHuman sera sample were tested at 1∶200 dilution. bCorresponds to number and percentage of positive volunteers; Percentage of positive responses evaluated as OD values above the negative control mean + 3SD. Sera samples obtained from Swiss adult donors with no malaria history and no previous travel to malaria-endemic areas were used as negative control. cPercentage of OD ratio higher than 2 between the mean of the experimental and the mean of the control sera OD. dp value calculated by Fisher's exact test between PNG and Colombia. NS = not significant (p>0.05).