| human fascioliasis in corozal, puerto rico. | a limited survey for human infection with f. hepatica was conducted in the mountain region of corozal, puerto rico. this region was selected because bovine fascioliasis was hyperendemic, watercress was grown locally for human consumption, and lymnaea cubensis snails (an intermediate host for f. hepatica in puerto rico) were found in the watercress farms. of 110 fecal samples examined 12 were positive for f. hepatica. seven matched serum samples were also positive for f. hepatica antibodies by co ... | 1982 | 7077460 |