During studies of helminth parasites of Australoheros facetus (Jenyns, 1842) collected in the Pampulha dam, Belo Horizonte, Minas Gerais, Brazil, in June and July 2011, it was verified the natural infection of these fishes by larval cestodes. From 20 specimens of A. facetus analyzed, 13 (65%) presented metacestodes in the intestine, with the mean intensity 2.69 (1-7) and mean abundance 1.8 (0-7). After morphological characterization, the parasites were identified as Parvitaenia macropeos (Wedl, 1855). This is the first report of metacestodes of Parvitaenia in Brazil and P. macropeos in South America. Australoheros facetus is a new host known for P. macropeos.

Strongyloides cruzi Rodrigues, 1968 was found in Ophiodes striatus (Spix, 1825) from Itabirito, state of Minas Gerais, Brazil. The morphology of the nematodes obtained was briefly described and compared with previous reports of Strongyloides spp. from lizards. Taxonomic comments about these parasites are presented and a species of Strongyloides, a genus whose members have rarely been reported in lizards, is for the first time observed in an anguid reptile.

Malacological surveys were carried out in lakes located near the São Francisco River or its tributaries in Iguatama, Minas Gerais, Brazil, between July 2009 and September 2010. Of 2.609 specimens of Biomphalaria straminea (Dunker, 1848) collected, 14 (0.54%) were infected by amphistomecercariae. Metacercariae obtained in solid subtract were used to perform experimental infection of AKR/J strain of mice. It was verified the presence of eggs of the parasite in the feces of the mice 30 days after infection. Adult parasites recovered from the intestinal caecum were identified as Zygocotyle lunata (Diesing, 1836). This is the first report of Z. lunata in B. straminea from Brazil.

Heterakis Dujardin, 1845 es un nemátodo que parasita las aves y presenta distribución cosmopolita. En Brasil, se registran 14 especies que ocurren en diferentes especies domesticadas y silvestres. Entre las especies reportadas, Heterakis gallinarum (Schrank, 1788) representa una amenaza potencial para los criaderos comerciales ya que es un vector de Histomonas meleagridis Smith, 1895, protozoario Trichomonadida que causa histomoniasis en las aves, una infección grave que puede ser letal y causar pérdidas económicas catastróficas. El presente estudio regsitra la ocurrencia de H. gallinarum en el ciego de pollos de corral (Gallus gallus domesticus Linnaeus, 1758) vendidos en un gran centro comercial de Vitoria, Espirito Santo, Brasil. En este estudio se describen e ilustran los tres ejemplares machos y tres hembras encontrados.