Publications

characterization of toxins from the broad-banded water snake helicops angulatus (linnaeus, 1758): isolation of a cysteine-rich secretory protein, helicopsin.	helicops angulatus (broad-banded water snake) according to recent proposals is presently cited in the family dipsadidae, subfamily xenodontinae, forming the tribe hydropsini along with the genera hydrops and pseudoeryx. the current work characterizes the proteolytic and neurotoxic activities of h. angulatus crude toxins from salivary excretion (se) and describes the isolation and identification of a cysteine-rich secretory protein (crisp) called helicopsin. the se lethal dose (ld₅₀) was 5.3 mg/k ...	2010	20931174
new records of helminths in reptiles from five states of brazil.	forty five specimens representing nine species of reptile (salvator merianae, enyalius bilineatus, amphisbaena alba, xenopholis undulatus, chironius fuscus, helicops angulatus, chironius flavolineatus, erythrolamprus viridis and crotalus durissus) collected in five brazilian states were examined for helminths. twelve helminth species were found as follow: nine nematoda (physaloptera tupinambae, strongyluris oscari, paracapillaria sp., dracunculus brasiliensis, physaloptera liophis, serpentirhabi ...	2018	29489929
uterine and eggshell modifications associated with the evolution of viviparity in south american water snakes (helicops spp.).	the evolution of viviparity requires eggshell thinning to bring together the maternal uterus and extraembryonic membranes to form placentae for physiological exchanges. eggshell thinning likely involves reduced activity of the uterine glands that secrete it. we tested these hypotheses by comparing the uterine and eggshell structure and histochemistry among oviparous and viviparous water snakes (helicops) using phylogenetic methods. eggshell thinning occurred convergently in all three origins of ...	2018	29656535
non-venomous snakebites in the western brazilian amazon.	in this study, we examined the clinical manifestations, laboratory evidence, and the circumstances of snakebites caused by non-venomous snakes, which were treated at the regional hospital of juruá in cruzeiro do sul.	2019	31166491