Parasites of the genus Clinostomum Leidy, 1856, are widely distributed across all continents and can infect vertebrates from various groups. In fish, they are known as causative agents of "white spot disease," which, in some cases, may lead to host mortality. Reports of new hosts for these trematodes have been steadily increasing. In this context, the present study documents new host Acestrorhynchus falcirostris (Cuvier, 1819) for the species Clinostomum marginatum(Rudolphi, 1819) and contributes to understanding its distribution in the Brazilian Amazon.

This study investigates the parasitic fauna of Mugil curema Valenciennes, 1836 (Mugilidae) from Laguna, southern Santa Catarina, Brazil, being the first parasitological survey of this species in the region. A total of 52 specimens were examined for ecto- and endoparasites. The external examination revealed Ergasilidae specimens and copepod eggs on the gills, while the monogenean Metamicrocotyla macracantha (Alexander, 1954) was identified. Internal prospection showed the presence of the acanthocephalan Neoechinorhynchus curemai Noronha, 1973 and one unidentified digenean from the family Haploporidae. Histopathological analysis revealed hepatic lesions and mild inflammation in intestinal tissue. These findings underscore the importance of parasites in M. curema, contributing to the ecological understanding of parasitism in marine fish and its potential implications for human health and en...

Capillaria plica Rudolphi, 1819, a parasitic nematode, infects the urinary tract of both domestic and wild carnivores. Despite its global presence, clinical reports are rare in certain regions, including Brazil. This study documents the first occurrence of C. plica in a Puma concolor Linnaeus, 1771 (Puma) from Santa Catarina, southern Brazil, marking the first report of this parasite in the southern part of the country. Necropsy and urinary sediment analysis revealed the presence of C. plica eggs and adult nematodes. The parasite's diagnosis is challenging due to its subclinical nature and the difficulty in visualizing eggs and adults, especially in wild felids. This case highlights the importance of urinalysis in wild carnivores for diagnosing urinary capillariasis and emphasizes the need for heightened awareness of this parasitic disease, particularly in under-researched regions.