de Quadros Rosiléia Marinho, Júnior Jary André Carneiro, Raffi Max Farjallat, Casagrande Renata Assis, Bassini-Silva Ricardo
Departamento de Medicina Veterinária, Centro de Ciências Agroveterinárias, Universidade do Estado de Santa Catarina (Cav Udesc), Lages, SC, Brazil.
Laboratório de Zoologia e Parasitologia, Universidade do Planalto Catarinense (UNIPLAC), Lages, SC, Brazil.
Vet Res Commun. 2025 Jun 12;49(4):221. doi: 10.1007/s11259-025-10784-y.
This study aims to document the first record of the trematode Collyriclum faba in Brazil. This species parasitizes various bird groups, including Passeriformes, Galliformes, and domestic birds, across Europe, Northeast Asia, and the Americas. An Azure Jay (Cyanocorax caeruleus) found in Praia Grande, Santa Catarina State, southern Brazil, exhibited an unusual enlargement and obliteration of the pericloacal region by an approximately 4 cm diameter, multilobular mass was firm in consistency. A sample of the excised tissue was extracted and sent for histopathological analysis, revealing eight adult C. faba specimens within the cyst. Each cyst cavity contained two parasites, surrounded by fibrous connective tissue, forming multiple cavitations. Longitudinal and transverse sections of the trematodes showed a tegument-covered body with parenchymal lining inside the cavity. The uterus contained numerous thick-walled, yellowish-brown eggs. The parasites were encircled by a predominant infiltrate of macrophages, multinucleated giant cells, and diffuse heterophils, accompanied by bacterial colonies, resulting in the formation of a parasitic heterophilic granuloma.
本研究旨在记录巴西首次发现的吸虫科豆形殖吸虫。该物种寄生于欧洲、东北亚和美洲的各种鸟类群体，包括雀形目、鸡形目和家禽。在巴西南部圣卡塔琳娜州大普拉亚发现的一只天蓝鸦（Cyanocorax caeruleus），其泄殖腔周围区域出现异常肿大，被一个直径约4厘米的多叶状肿块占据，质地坚硬。切除的组织样本被提取并送去进行组织病理学分析，结果显示囊肿内有8只成年豆形殖吸虫标本。每个囊肿腔内有两只寄生虫，周围是纤维结缔组织，形成多个空洞。吸虫的纵切面和横切面显示，其体表有被膜覆盖，腔内有实质内衬。子宫内有许多厚壁、黄褐色的卵。寄生虫周围主要是巨噬细胞、多核巨细胞和弥漫性嗜异性粒细胞浸润，并伴有细菌菌落，导致形成寄生性嗜异性肉芽肿。
