NUEVOS DATOS ACERCA DE TEREANCISTRUM PARVUS KRITSKY ET AL. Y T. PARANAENSIS KARLING ET AL. (MONOGENEA: DACTYLOGYRIDAE) DE LEPORINUS OBTUSIDENS VALENCIENNES (CHARACIFORMES: ANOSTOMIDAE) DEL LAGO GUAÍBA, REGIÓN SUR DE BRASIL

Terencistrum parvus Kritsky, Thatcher & Kayton, 1980 e T. paranaensis Karling, Lopes, Takemoto & Pavanelli, 2014, são registrados pela primeira vez em brânquias de Leporinus obtusidens Valenciennes, 1837 do Lago Guaíba, Rio Grande do Sul, região sul do Brasil. Tereancistrum paranaensis teve sua descrição original alterada para corrigir a posição da vagina, que foi descrita como dextra, quando na verdade é sinistra, além disso, alguns dados morfométricos foram revisados. A descrição de T. parvus é complementada com desenhos de um espécime montado in toto, detalhes da vagina e gônadas, bem como com medidas das estruturas internas dos espécimes coletados em brânquias de piava, L. obtusidens do Lago Guaíba

Presence of eggs of Toxocara spp. and hookworms in a student environment in Rio Grande do Sul, Brazil

Environmental contamination by parasite forms was studied on a university campus in the municipality of Pelotas, Rio Grande do Sul. Soil samples were analyzed using the modified Caldwell & Caldwell technique to identify parasite forms. Nematode eggs were detected in 62% of the samples. Among the parasites detected, eggs of Toxocara spp. and Ancylostomatidae were the most prevalent parasites in the studied area throughout the study period. The results demonstrated that there is significant environmental contamination, thereby representing a risk of zoonotic infection for humans frequenting the study area

Metazoan parasites of Geophagus brasiliensis (Perciformes: Cichlidae) in Patos lagoon, extreme south of Brazil

Abstract This study has evaluated the parasitic fauna of 79 pearl cichlids (Geophagus brasiliensis) from the estuary of Patos Lagoon (31° 57' S and 52° 06' W), Rio Grande do Sul, Brazil, during the months of May and June in 2011 and 2012. All the hosts analyzed were infected with at least one species of parasite. A total of eleven metazoa were identified in 459 specimens collected. The trematode Austrodiplostomum compactum (34.2%) and ergasilids Ergasilus lizae (32.9%) and Gauchergasilus lizae (32.9%) were the most prevalent species. The trematodes Thometrema overstreeti and Posthodiplostomum sp. had significantly higher prevalence in fish longer than 20 cm. The sex of the host had no effect on parasite prevalence and abundance. Pearl cichlids are registered as a new host for the trematodes Lobatostoma sp., Homalometron pseudopallidum and Thometrema overstreeti, for the ergasilids Ergasilus lizae and Gauchergasilus euripedesi and for the argulid Argulus spinolosus. The crustacean E. lizae is recorded in Rio Grande do Sul for the first time