SummaryDue to an inadequate knowledge about threats to the sea turtle, we aimed to evaluate the helminth fauna of Chelonia mydas which had died on the southern coast of Espirito Santo, Brasil and described the associated tissue pathological lesions. Retrospective and prospective studies on turtle parasites were conducted and tissues samples were collected. 106 of 212 of sea turtles (50 %) were parasitized, and 47 of 106 of infected animals 43.0 % (47/106) were in poor health condition. Seven trematoda families covering 19 different helminths species were identifi ed. Turtles were inhabited with one or more species of parasites, and there was no signifi cant association between parasitism and weakness of the animals. Trematode eggs, with or without giant cells in tissues of various organs were observed.

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Background The Callithrix geoffroyi are increasingly present in Brazilian urban areas, where they are vulnerable to health problems. The purpose of this study was a description of hematology and nine blood chemistry parameters of free‐ranging C. geoffroyi. Methods Thirty individuals were captured in urban‐forested settings. The marmosets were anesthetized, venopunctioned, and released shortly after recovery. The analysis was carried on in a veterinary laboratory, using automatic cells counter, staining methods, and an automatic biochemical analyzer. Results and Conclusions Male and female free‐ranging C. geoffroyi have similar hematological and blood chemistry values. The adults presented higher concentrations of erythrocytes (P <.02) and hemoglobin (P <.02) than young marmosets. The platelet concentration was lower (P <.05) in adults comparing to young marmosets. There were not statistically significant differences between young and adult blood chemistry concentrations. This is the first time that are presented hematology and blood biochemistry data on free‐ranging C. geoffroyi.