First records of molluscs naturally infected with Angiostrongylus cantonensis (Nematoda: Metastrongyloidea) in Northeastern Brazil, including new global records of natural intermediate hosts

• Published in: Revista do Instituto de Medicina Tropical de São Paulo
• Main Authors: Jucicleide Ramos-de-Souza, Silvana Carvalho Thiengo, Monica Ammon Fernandez, Suzete Rodrigues Gomes, Jéssica Corrêa Antônio, Marianna de Carvalho Clímaco, Juberlan Silva Garcia, Arnaldo Maldonado-Junior, Luciene Barbosa, Silvio Santana Dolabella
• Format: Article in Journal/Newspaper
• Language: English
• Published: Universidade de São Paulo (USP) 2018
• Subjects: Eosinophilic meningitis; Angiostrongylus; Achatina fulica; Bulimulus tenuissimus; Cyclodontina fasciata; Land snails; Arctic medicine. Tropical medicine; RC955-962; Infectious and parasitic diseases; RC109-216; Arctic; Barra
• Online Access: https://doi.org/10.1590/s1678-9946201860051; https://doaj.org/article/1f20c1fca6d94ca5a15fb11389e4fe5b

ABSTRACT Human neural angiostrongyliasis is an emerging infectious disease caused by nematode Angiostrongylus cantonensis. The present study investigated the presence of Angiostrongylus spp. in terrestrial molluscs collected from the following areas in the Metropolitan Region of Aracaju, Sergipe State, Brazil: Barra dos Coqueiros, Nossa Senhora do Socorro, Sao Cristovao and Aracaju. In total, 703 specimens representing 13 mollusc species were screened for Angiostrongylus spp. Larvae of Angiostrongylus spp. were found in three species. Larvae recovered from Achatina fulica were used for experimental infection in Wistar rats (Rattus norvegicus). For specific identification of nematodes, the mitochondrial cytochrome c oxidase subunit I (COI) was sequenced from both larvae and adults recovered from molluscs and rats, respectively. Infection with A. cantonensis was detected in all municipalities and in the following three host species: Bulimulus tenuissimus, Cyclodontina fasciata (Barra dos Coqueiros), and A. fulica (Aracaju, Nossa Senhora do Socorro and Sao Cristovao). Co-infections were also found with Caenorhabditis sp. and Strongyluris sp. larvae. This is the first study of the helminth fauna associated with the terrestrial malacofauna in Sergipe State, and confirms that these three snail species are involved in the transmission of A. cantonensis in the state. In addition, B. tenuissimus and C. fasciata are newly reported natural hosts of the parasite.