Rodrigues Rogério Antonio Ribeiro, Pereira Washington Luiz Assunção, Pinheiro Raul Henrique da Silva, Giese Elane Guerreiro
Programa de Pós-graduação em Saúde e Produção Animal na Amazônia, Instituto da Saúde e Produção Animal, Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil.
Laboratório de Patologia Animal, Instituto da Saúde e Produção Animal, Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil.
Rev Bras Parasitol Vet. 2025 Mar 31;34(1):e021824. doi: 10.1590/S1984-29612025013. eCollection 2025.
Non-human primates are potential hosts for helminths of various phyla, and the presence of these parasites can cause changes in organ morphology and functionality. In this study, we present the alterations induced by the presence of acanthocephalan parasites in the small intestine of a snub-nosed monkey that died in the Bosque Rodrigues Alves, municipality of Belém, Pará state, Brazil. Ten specimens of Saimiri sciureus had their intestines analyzed and the parasites recovered were cleaned, quantified, fixed and observed using light microscopy and scanning electron microscopy, and fragments of the intestine were separated for histological analysis to identify the alterations. All the animals were parasitized, and a total of 50 specimens representing the Acanthocephala Phylum were recovered, which morphologically showed characteristics compatible with Prosthenorchis elegans (Diesing, 1851). Light microscopy revealed the presence of parasites attached to the mucosal layer, passing through the underlying layers until they reached the muscular layer. Scanning electron microscopy showed the tissue lesions caused by the proboscis hooks and the flattening of the intestinal villi in the presence of the parasite. The presence of the parasites in the intestine changed the morphology of the organ, possibly causing loss of functionality at the site of attachment and adjacent tissue.
非人灵长类动物是各种门类蠕虫的潜在宿主，这些寄生虫的存在会导致器官形态和功能的变化。在本研究中，我们展示了在巴西帕拉州贝伦市博斯克·罗德里格斯·阿尔维斯死亡的一只短鼻猴小肠中，棘头虫寄生虫的存在所引发的改变。对10只松鼠猴的肠道进行了分析，将回收的寄生虫进行清理、计数、固定，并使用光学显微镜和扫描电子显微镜进行观察，同时分离出肠道片段进行组织学分析以确定改变情况。所有动物均被寄生，共回收了50个代表棘头虫门的标本，其形态显示出与秀丽前棘头虫（迪辛，1851年）相符的特征。光学显微镜显示寄生虫附着在黏膜层，穿过下层直至到达肌肉层。扫描电子显微镜显示了在寄生虫存在的情况下，吻钩造成的组织损伤以及肠绒毛的扁平化。肠道中寄生虫的存在改变了器官的形态，可能导致附着部位及相邻组织的功能丧失。
