summerrain1 0 Posté(e) le 7 octobre 2008 Bon, je suis en pleine rédaction de mon dossier CDC, que je demande pour divers colubridés, dont les Chionactis. Vite fait pour ceux qui ne connaissent pas c'est un genre de couleuvres nord-américaines insectivores fouisseurs d'une taille adulte d'environ 40cm, très colorés. Il y a deux espèces, C. occipitalis (4 ssp) et C. palarostris (2 ssp), pour illustration une occipitalis : http://www.californiaherps.com/snakes/images/cooccipitalisriv04.jpg Là où j'ai besoin d'aide, c'est qu'il semblerait que ce soit un opistodonthe (opistodonte ? je sais plus l'écrire...), donc salive toxique (comme les Heterodon) qui normalement est à peine suffisante pour tuer un invertébré (dont ils se nourrissent). Ils ne sont d'ailleurs pas soumis à CDC à la base. Mais j'aimerais quand même détailler un peu la composition dudit venin et ses effets sur l'homme. D'où question : où puis-je trouver ces infos (en anglais ou en français, je suis billingue) ? Partager ce message Lien à poster Partager sur d’autres sites
askook 0 Posté(e) le 7 octobre 2008 Je n'ai rien trouvé Juste cela, mais tu as dû déjà consulter ( http://www.toxinology.com/index.cfm ) Chionactis occipitalis venom General: Venom Neurotoxins Unknown General: Venom Myotoxins Unknown General: Venom Procoagulants Unknown General: Venom Anticoagulants Unknown General: Venom Haemorrhagins Unknown General: Venom Nephrotoxins Unknown General: Venom Cardiotoxins Unknown General: Venom Necrotoxins Unknown General: Venom Other Unknown Clinical Effects General: Dangerousness Unknown, but unlikely to cause significant envenoming, most unlikely to be dangerous (based on current, limited, information). General: Rate of Envenoming: Unknown but likely to be low General: Untreated Lethality Rate: Unlikely to prove lethal, based on current (limited) information General: Local Effects Insufficient clinical reports to know, but most likely minor local pain & swelling only General: Local Necrosis Insufficient clinical reports to know, but local necrosis most unlikely General: General Systemic Effects Insufficient clinical reports to know, but systemic effects not expected General: Neurotoxic Paralysis Insufficient clinical reports to know, but unlikely to occur General: Myotoxicity Insufficient clinical reports to know, but unlikely to occur General: Coagulopathy & Haemorrhages Insufficient clinical reports to know, but unlikely to occur General: Renal Damage Insufficient clinical reports to know, but unlikely to occur General: Cardiotoxicity Insufficient clinical reports to know, but unlikely to occur General: Other Insufficient clinical reports to know Chionactis palarostris Venom General: Venom Neurotoxins Unknown General: Venom Myotoxins Unknown General: Venom Procoagulants Unknown General: Venom Anticoagulants Unknown General: Venom Haemorrhagins Unknown General: Venom Nephrotoxins Unknown General: Venom Cardiotoxins Unknown General: Venom Necrotoxins Unknown General: Venom Other Unknown Clinical Effects General: Dangerousness Unknown, but unlikely to cause significant envenoming, most unlikely to be dangerous (based on current, limited, information). General: Rate of Envenoming: Unknown but likely to be low General: Untreated Lethality Rate: Unlikely to prove lethal, based on current (limited) information General: Local Effects Insufficient clinical reports to know, but most likely minor local pain & swelling only General: Local Necrosis Insufficient clinical reports to know, but local necrosis most unlikely General: General Systemic Effects Insufficient clinical reports to know, but systemic effects not expected General: Neurotoxic Paralysis Insufficient clinical reports to know, but unlikely to occur General: Myotoxicity Insufficient clinical reports to know, but unlikely to occur General: Coagulopathy & Haemorrhages Insufficient clinical reports to know, but unlikely to occur General: Renal Damage Insufficient clinical reports to know, but unlikely to occur General: Cardiotoxicity Insufficient clinical reports to know, but unlikely to occur General: Other Insufficient clinical reports to know PS: Opisthodonte est la bonne orthographe Partager ce message Lien à poster Partager sur d’autres sites
summerrain1 0 Posté(e) le 7 octobre 2008 vi, c'est le seul site que j'ai trouvé, mais bon des "unknown" partout ça risque de faire léger dans le dossier Merci pour l'orthographe Partager ce message Lien à poster Partager sur d’autres sites
Chance-reptil-virus 0 Posté(e) le 8 octobre 2008 Salut Summerrain, Une petite vidéo de Chionactis: Chionactis> Légèrement toxique / Mildly Toxic Snakes: http://www.greenvalleyweb.com/pages/az-life/warnings/poisonous-snakes.php ------------------------- Lis ce texte, un lien est donné, peut-être y trouveras-tu quelques infos: " Default Phylogenetic basis for snake venoms Here's someinformation about the basis of snake venoms. There are a large number of species of snakes that produce venom-like effects after a bite. The ones you mentioned above are only a few. However, very few ever produce severe medically significant effects. One of my particular interests concerns shovelnose snakes and their relationship with scorpion, in particular centruroides spp. - bark scorpions). There have been anecdotal reports of people being bitten by shovelnose snakes (chionactis spp.) and feeing numbness and other neurological signs after the bite around the bite site. As has been mentioned to me by another researcher, all colubrid snakes are descended from a venomous common ancestor, most retain a venom gland, and most secrete many of the original toxin families found in the ancestral advanced snake, so there is no mystery as to where Chionactis might get any toxic secretions from. Check out the papers by Fry et al (2003) and Fry and W?ster (2004), which you can download from http://biology.bangor.ac.uk/~bss166/Publications.htm. Also, as was pointed out to me, there are a number of different toxins that can cause tingling or other neurological symptoms. For instance, most colubrids have three-finger toxins, which include, among other things, the neurotoxins that kill you after elapid bites - these may well produce tingling or other neurological symptoms after colubrid bites, when injected in minute quantities. Here's a start for you in you are interested in the purely scientific aspects. Two researchers that are at the forefront are Dr. Wuster and Fry. Check out the website mentioned above. Dr. Joe (Desert snakeman) " ----------------------- Pour l'instant, c'est tout ce que j'ai pu trouver et c'est bien peu, désolée. A très bientôt. Partager ce message Lien à poster Partager sur d’autres sites
