COMPARATIVE-STUDY OF TRICHURIS-TRICHIURA FROM NONHUMAN-PRIMATES AND FROM MAN, AND THEIR DIFFERENCE WITH T-SUIS

Whipworms from the macaque and baboon were studied by light and scanni ng electron microscopy. They were identified as Trichuris trichiura, t hough a slight variation was observed in the length of spicule as comp ared with the whipworms collected from man. Moreover, a row of small k nob-like structures was observed at the base of the pericloacal papill ae of T. trichiura from the monkey by scanning electron microscopy. T. trichiura from non-human primates and man has been reported to be mor phologically indistinguishable from T. suis. However, this study showe d that males of T trichiura from both the monkey and man can be differ entiated from T. suis from the pig on the basis of the presence of a p air of pericloacal papillae and a cluster of small papillae near the c audal end in the former, which is totally absent in the latter.