Banca de QUALIFICAÇÃO: ROGÉRIO ANTONIO RIBEIRO RODRIGUES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : ROGÉRIO ANTONIO RIBEIRO RODRIGUES
DATE: 19/11/2024
TIME: 14:00
LOCAL: LABORATÓRIO DE HISTOLOGIA E EMBRIOLOGIA ANIMAL
TITLE:

GASTROINTESTINAL HELMINTHS OF THE INTESTINE OF Saimiri sciureus IN THE URBAN REGION OF THE MUNICIPALITY OF BELEM-PA

KEY WORDS:

Acanthocephala, Parasite, Saimiri sciureus, Amazon

PAGES: 50
BIG AREA: Ciências Biológicas
AREA: Parasitologia
SUBÁREA: Helmintologia de Parasitos
SPECIALTY: Helmintologia Animal
SUMMARY:

There are approximately 133 species of non-human primates in Brazilian territory, of which 80 are found in the Amazon territory. Various species of neotropical primates can be found in the Rodrigues Alves Botanical Garden in Amazonia, as this place is an important representative of a conservation and preservation environment. These primate species are potential hosts for helminths from various phyla, such as Nematoda, Platyhelminthes and Acanthocephala. The aim of this study is to investigate which helminths occur in Saimiri sciureus from the Rodrigues Alves Botanical Garden in Amazonia, and to describe the histological changes that occur in the intestine of S. sciureus due to the parasitic interaction of these helminths with the intestine. The specimens of S. sciureus were donated by the Rodrigues Alves Botanical Garden of Amazonia, Belém-PA, to the Animal Pathology Laboratory (LABOPAT) of the Federal Rural University of Amazonia, after being found dead. These specimens were submitted to necroscopic examination to determine their cause of death. In the small intestine, the presence of helminths from the Nematoda, Platyhelminthes and Acanthocephala phyla were detected. The helminths were fixed in 10% buffered formalin. The parasitized intestine samples were sent to the Histology and Embryology Laboratory (LHEA) at the Federal Rural University of Amazonia to identify the helminths and describe the histological changes using light microscopy and scanning electron microscopy. The nematodes found parasitizing the small intestine of S. sciureus exhibited characteristics of the Family Oxyuridae and the Genus Trypanoxyuris. The platyhelminth helminths belonged to the Cestoda Class, while the acanthocephalan helminths were diagnosed as belonging to the Prosthenorchis Genus. These helminths were responsible for inducing serious morphological changes in the intestines of the hosts. From the light microscopy analysis of the intestines parasitized by Prosthenorchis, it was possible to identify the helminth anchored in the mucosal layer, passing through the underlying layers until it reached the muscular layer. Scanning electron microscopy made it possible to analyze the external morphological characteristics of the helminth and the details of the tissue lesions caused by them. The helminths from the Nematoda and Platyhelminthes phyla will need to be subjected to more in-depth analysis in order to diagnose the helminth species. The Acanthocephala showed characteristics of the Prosthenorchis elegans species. This helminth is responsible for severe morphological changes and for impairing the vital function of the parasitized organ in S. sciureus.

COMMITTEE MEMBERS:
Presidente - 2313941 - ELANE GUERREIRO GIESE
Interna - 1661748 - ERIKA RENATA BRANCO
Interna - 1733442 - ANA RITA DE LIMA
Externo ao Programa - 3100340 - RAUL HENRIQUE DA SILVA PINHEIRO - UFRAExterno à Instituição - TIAGO PAIXAO MANGAS - IFPA
Externo à Instituição - PAULO HENRIQUE LEAL BERTOLO - UNESP
Externa à Instituição - ELAINE LOPES DE CARVALHO - UFRA