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infectado. Este é o primeiro relato de hospedeiros paratênicos de D. renale no Brasil e,<br />
provavelmente, também é o primeiro na região Neotropical.<br />
Palavras-chave: Dioctophyme renale, larva, morfologia, Chaunus ictericus,<br />
hospedeiros paratênicos, peixes.<br />
ABSTRACT - Dioctophyme renale larvae have been found in cysts surrounded by mild<br />
granulomatous reaction in the gastric wall of 5.17% (3/58) Chaunus ictericus specimens<br />
from São Cristóvão district, Três Barras municipality, Santa Catarina State, Brazil.<br />
However, larvae of this nematode were not found neither in Chaunus schneideri from<br />
the same region nor in analyzed fish of the orders Siluriformes, Characiformes and<br />
Perciformes. The nematode larvae were immunostained in tissue of paratenic host by<br />
methods of immunohistochemistry and indirect immunofluorescence in tissues, using<br />
sera from mice immunized with antigen produced from the esophagus of adults of D.<br />
renale. The larvae of this parasite obtained from C. ictericus was able to reach<br />
adulthood in a dog experimentally infected. This is the first report of paratenic hosts for<br />
D. renale in Brazil, and probably is also the first in the Neotropical region.<br />
Key words: Dioctophyme renale, larvae, morphology, Chaunus ictericus, paratenic<br />
hosts, fishes.<br />
1. INTRODUÇÃO<br />
Dioctophyme renale é um nematódeo parasito do rim de carnívoros domésticos e<br />
silvestres no Brasil. Pode ser observado erraticamente na cavidade peritoneal,<br />
especialmente em canídeos, e, raramente, ocorre em outros órgãos e tecidos<br />
(MEASURES, 2001). Sua epidemiologia envolve um ciclo evolutivo complexo, em que<br />
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