Canine visceral leishmaniasis (CVL), caused by Leishmania infantum (Ross, 1903), is an emerging disease in Uruguay, posing significant public and animal health challenges. This study aimed to evaluate the relationship between clinical signs and hematological, hepatic, and renal alterations in dogs seropositive for L. infantum in Uruguay. Canids were classified according to the absence/presence of clinical signs as asymptomatic (no apparent signs of disease), oligosymptomatic (less than three clinical signs compatible with CVL), polysymptomatic (three to six clinical signs), and hypersymptomatic (with more than six clinical signs). Laboratory analysis revealed significant alterations in hematological, hepatic, and renal parameters as the number of clinical signs increased. Polysymptomatic and hypersymptomatic dogs exhibited significant decreases in erythrocytes, hemoglobin, hematocrit, me...

Studies on parasites are essential tools for understanding the ecological dynamics of variations in population abundance, structural changes in communities, and the coevolutionary processes of their hosts. They play a fundamental role in modulating biodiversity and serve as excellent models for studying host-parasite relationships. In this context, we used samples collected in species surveys in four protected areas to describe the endoparasite communities of Enyalius bibroniiBoulenger, 1885 (Squamata: Leiosauridae) in the Caatinga domain of northeastern Brazil and investigated the factors that influence the composition of these communities. We analyzed 166 specimens of E. bibronii. The composition of endoparasites varied between sampling sites, but we identified six parasitic species, with Physaloptera lutzi Cristófaro, Guimaraes & Rodrigues, 1976 and Parapharyngodon alvarengai Fre...