Developmental Stages of Trypanosoma (Megatrypanum) freitasi Rego, Magalhaes & Siqueira, 1957 in the Opossum Didelphis marsupialis (Marsupialia, Didelphidae)

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Abstract
Tyrpanosoma (Megatrypanum) Freitasi, a parasite of marsupials of the genus Didelphis, has ben found to undergo in the lumen of the scent (anal) glands of its vertebrate host, a cycle such as usually occurs in the intestinal tract of the insect vectors of trypanosomatids and similar to what has been reported for Trypanosoma (Schizotrypanum) cruzi. The invertebrate host of Trypanosoma fritasi is still unknown. Developmental stages of the trypanosome in its mammalian host, especially the dividing epimastigotes, multinucleate plasmodial forms and rosettes found in the lumen of the scent glands of a naturally infected Didelphis marsupials are described and illustrated.