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...

Parasitological studies are important to understand the host-parasite interaction, providing information on the coevolution, biogeography, morphology, and diet of the species. The present study describes the endoparasite fauna of the lizard Phyllopezus pollicaris (Spix, 1825) in the Palmares National Forest, Piauí State, Brazil, a tropical forest covered by transitional vegetation between the Caatinga and Cerrado biomes. Furthermore, we investigated the influence of lizards’ size and sex on endoparasite infection patterns. We analyzed 23 individuals of P. pollicaris, of which 18 were infected by at least one helminth, belonging to the Nematoda phylum: Spauligodon oxkutzcabiensis (Chitwood, 1938), Strongyloides sp., and Parapharyngodon sp. Overall, S. oxkutzcabiensis showed the highest prevalence (73.9%), mean infection intensity (8.64 ± 12.7), and mean abundance (6.39 ± 11.5). We ob...