Paragonimiasis in Manipur

A survey was undertaken in the east district of Imphal valley of Manipur, India, using an intradermal test with saline extract of adult Paragonimus westermani as test antigen to find out the prevalence of paragonimiasis and some of the epidemiological factors attributable to it. A total of 3,467 individuals of both sexes aged five years and above were tested. A total of 2934 persons admitted eating crabs and among them 234 were found reactive to Paragonimus antigen. The prevalence rate observed was 6.7 per cent. The proportion of positive reactors (8.0%) among the crab eaters compared to 0.1 per cent among those-who did not eat crabs was highly significant (P < 0.01)