Snake Bites by Bothrops lanceolatus in Martinique.

Bothrops lanceolatus, a member of the Viperidae family and Crotalinae subfamily, is the only snake causing envenomation in Martinique, which is the only place it exists in the world. Any bite by this snake may result in severe thrombotic complications including cerebral, pulmonary, and myocardial infarction and affecting the patient's vital or functional prognosis. The exact composition of the venom as well as the mechanisms of toxicity involved are still debated today. The first specific antivenom immunotherapy (AVI), Bothrofav1, manufactured in 1991, reduced mortality and morbidity significantly. In 2004, however, an increase in the number of cases of Bothrops lanceolatus envenomation-induced ischemic strokes despite early AVI administration, raised questions about its effectiveness and encouraged the development of a second AVI, Bothrofav2, which became available in February 2011. Causes of the failures with the first AVI remain hypothetical, and the effectiveness of the second is under evaluation. This article reviews the published data available on this rare envenomation, present in one of our French overseas departments and discusses its fascinating scientific and medical issues.