The feces of 145 patients were examined in this laboratory during the past four and one-half months. Thirty-five of these examinations were made relative to the function of the pancreas, or as controls; the remaining 110 in patients suffering with chronic diarrheas, anemias, or unexplainable abdominal conditions. In sixty-five of these 110 patients one or more of the following intestinal parasites were found; viz., Amœba, Trichomonas intestinalis, Cercomonas intestinalis. Balantidium coli, Strongyloides intestinalis, Lamblia intestinalis, Ascaris lumbricoides or Trichocephalus dispar. Thirty-four of the sixty-five patients, in whom these intestinal parasites were found, had never been south of the state of Iowa. Of this latter group, eleven were infected with Entamœba tetraqena and one with Entamœba histolytica.
These findings are so contrary to the generally existing belief that such organisms are rarely seen in persons who have never lived in, nor visited, southern countries, that they have been considered sufficiently important
SISTRUNK WE. INTESTINAL PARASITES FOUND IN INDIVIDUALS RESIDING IN THE NORTHWEST: FREQUENT PRESENCE OF PROTOZOA IN PATIENTS WHO HAVE NEVER BEEN IN SOUTHERN COUNTRIES. JAMA. 1911;LVII(19):1507–1509. doi:10.1001/jama.1911.04260110007003
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