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Image of the Week for July 16, 2007

Other Tapeworm Infections. Proglottids of Dipylidium caninum. Such proglottids (average mature size 12 mm x 3 mm) have two genital pores, one in the middle of each lateral margin. Proglottids may be passed singly or in chains, and occasionally may be seen dangling from the anus. They are pumpkin seed-shaped when passed and often resemble rice grains when dried. The genital pores are clearly visible in the carmine-stained proglottid shown in D. The proglottid shown in E (size 15 mm x 3 mm, preserved in formalin), was passed by a 9 month-old boy in the state of Oregon.
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