The Life Cycle of Paragonimus kellicotti in Cats

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Abstract
Migration and development of P. kellicotti were studied in cats killed 1-265 days after feeding 15-20 metacercariae from the hearts of naturally infected crayfish. Metacercariae excysted in the intestine and appeared in the peritoneal cavity within 24 h. Some young flukes penetrated the diaphragm and migrated to the pleural cavity in the 1st wk, but most penetrated the pleura 10-14 days post infection [p.i.]. No flukes were found in the pleural cavity after 23 days p.i. By 4 wk p.i., the flukes were well established within lung parenchyma, mainly in the right caudal lobe, where most of their growth occurred. Eggs were seen in flukes, on the 34th day p.i. and in feces 2 days later. Estimated daily ova production ranged from 1000-2000 eggs/fluke per day.

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