Volume 84, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Human paragonimiasis is an emerging disease in Missouri. To characterize local parasites, we examined crayfish from three rivers. Metacercaeriae consistent with were detected in 69%, 67%, and 37% of crayfish from the Big Piney, Huzzah, and Black Rivers, respectively. Sequencing of the second internal transcribed spacer and other DNA markers confirmed the species identification and the presence of identical parasite sequences in clinical specimens from two human cases. Mongolian gerbils were infected by intraperitoneal injection with 3–8 metacercariae. Most gerbils died 15–49 days post-infection. Necropsies showed pulmonary hemorrhage with necrosis, and flukes as long as 8 mm were recovered from intrathoracic tissues. Western blot analysis using antigen showed a strong antibody response in gerbils 39 days post-infection. These results demonstrate that is common in Missouri crayfish. The gerbil model may be useful for research on the pathogenesis, immunology, and treatment of paragonimiasis.


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  • Received : 12 Jan 2011
  • Accepted : 24 Feb 2011
  • Published online : 01 Jun 2011

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