Publications

first reported case of thrombocytopenia from a heterodon nasicus envenomation.	the vast majority of the 2.5 million annual worldwide venomous snakebites are attributed to viperidae or elapidae envenomations. of the nearly 2000 colubridae species described, only a handful are known to cause medically significant envenomations. considered medically insignificant, heterodon nasicus (western hognose snake) is a north american rear-fanged colubrid common in the legal pet trading industry. previously reported cases of envenomations describe local pain, swelling, edema, and blist ...	2019	30465776
ontogenetic shifts in the diet of plains hog-nosed snakes (heterodon nasicus) revealed by stable isotope analysis.	wild snake diets are difficult to study using traditional methods, but stable isotopes offer several advantages, including integrating dietary information over time, providing data from individuals that have not fed recently, and avoiding bias towards slowly-digesting prey items. we used stable isotope signatures of carbon and nitrogen from scale tissue, red blood cells, and blood plasma to assess the diet of wild plains hog-nosed snakes (heterodon nasicus) in illinois. we developed bayesian mix ...	2017	27692795
non-front-fanged colubroid snakes: a current evidence-based analysis of medical significance.	non-front-fanged colubroid snakes (nffc; formerly and artificially taxonomically assembled as "colubrids") comprise about 70% of extant snake species and include several taxa now known to cause lethal or life threatening envenoming in humans. although the medical risks of bites by only a handful of species have been documented, a growing number of nffc are implicated in medically significant bites. the majority of these snakes have oral products (duvernoy's secretions, or venoms) with unknown bi ...	2013	23462380
a new species of eimeria (apicomplexa: eimeriidae) from the western hognose snake, heterodon nasicus (serpentes: xenodontidae), from texas.	a new species of coccidian (apicomplexa: eimeriidae) is described from the feces of a western hognose snake heterodon nasicus (serpentes: xenodontidae) collected from texas, and housed in the collection of the zoological society of london. oocysts of eimeria mchenryi n. sp. are cylindrical, 35.0 ± sd 1.4 (32-37) × 17.0 ± 0.7 (16-18) µm; the shape index (length/width) is 2.05. a micropyle, oocyst residuum, and polar granule are absent. sporocysts are subspherical 9.3 (7-11.5) × 7.7 (6-9) µm, with ...	2011	21506855
a case study of megaselia scalaris (diptera: phoridae) causing ocular myiasis in a western hognose snake.	late instar larvae of the scuttle fly, megaselia scalaris loew, were found near the right eye of a live captive-reared western hognose snake, heterodon nasicus baird and girard. dissection and removal of the snake's dorsal cranial bones revealed tissue degradation of the infected eye, the optic nerve, and the brain case; we suggest that these factors contributed to the death of this snake. this case study further demonstrates the opportunistic behavior of m. scalaris.	2011	21845957
metastatic ductal adenocarcinoma in a western hognose snake (heterodon nasicus).	a 17-yr-old western hognose snake (heterodon nasicus) presented with a prominent midcoelomic swelling. surgical exploration revealed a large, multicystic, irregular, tan, and firm mass grossly effacing the splenopancreas. the mass was subsequently removed. histologically, the mass was composed of tubules of columnar to flattened neoplastic cells with an abundant stroma and moderate cellular atypia consistent with a scirrhous adenocarcinoma, likely ductal in origin, given the location of the neop ...	2010	20597225
local envenoming by the western hognose snake (heterodon nasicus): a case report and review of medically significant heterodon bites.	a case of clinically significant local envenoming resulting from a bite inflicted by a western hognose snake, heterodon nasicus, is described. the patient was bitten while offering a juvenile mouse to a captive snake. the snake maintained a grip on the patient's arm (left anticubital fossa) for several minutes. the bite resulted in marked edema, ecchymoses, lymphadenopathy, cutaneous signs suggestive of mild cellulitis and blister formation. there were no systemic effects. recovery was complete ...	2009	19393681
relict snakes of north america and their relationships within caenophidia, using likelihood-based bayesian methods on mitochondrial sequences.	this paper focuses on the phylogenetic relationships of eight north american caenophidian snake species (carphophis amoena, contia tenuis, diadophis punctatus, farancia abacura, farancia erytrogramma, heterodon nasicus, heterodon platyrhinos, and heterodon simus) whose phylogenetic relationships remain controversial. past studies have referred to these "relict" north american snakes either as colubrid, or as neotropical dipsadids and/or xenodontids. based on mitochondrial dna ribosomal gene sequ ...	2004	15223038
characterization of venom (duvernoy's secretion) from twelve species of colubrid snakes and partial sequence of four venom proteins.	r.e. hill and s.p. mackessy. characterization of venom (duvernoy's secretion) from twelve species of colubrid snakes and partial sequence of four venom proteins. toxicon xx, xx-yy, 2000. - venomous colubrids, which include more than 700 snake species worldwide, represent a vast potential source of novel biological compounds. the present study characterized venom (duvernoy's gland secretion) collected from twelve species of opisthoglyphous (rear-fanged) colubrid snakes, an extremely diverse assem ...	2000	10858509