This time about the immune system.
And, first of all, immune to the poison of snakes possess a snake)))
However, not all. And even more than that: there are cases when the snake was seriously suffering from their own poison!
So, in 2002, a major female Cobra Naja annulifera almost died from necrosis as a result of smokos. And this was exactly what the result of your own poison, because the dead tissue were sterile – no infection, the only poison!
Extensive abscess fallen into necrosis after smokus Naja annulifera
But this is a rare case – usually vipers and asps can safely bite yourself, nothing will be changed. Although, detailed studies “of cmomunity” quite a bit, and while deployed to answer such a philosophical question .
Except that there is data on the blood of jararaca ( Bothropoides jararaca ), showing a particular structure of fibrinogen. Fibrinogen (aka factor I) is a protein that plays an important role in blood clotting in vertebrates. Usually if the damage to the walls of blood vessels runs long and complex biochemical reaction involving many different cells and enzymes – in particular, a protein called fibrinogen (freely floating in the blood plasma) is ultimately converted into fibrin, which is a thick network of thin threads, which confused everything that swims in the blood. Roughly speaking, the resulting “dried blood” on the exit wounds – is precisely the fibrin network.
To ensure that fibrinogen is turned into fibrin, it is necessary first to act with an enzyme called thrombin (which, if you are not injured, just in the blood doesn’t swim).
So here are some components of the venom of Viper is identical in its effect with thrombin! As a result, after the bite you start snowballing uncontrolled coagulation (i.e. DIC).
However, the fibrinogen of the blood of araragi resistant to their venom! And yet the poison of the rattle-snake and bushmaster)))
Of course, garrak, Cascavel, bushmasters and many other snakes that are resistant to your (and others) the poison must be much more interesting adaptations in addition to the “buggy” of fibrinogen. But it is a matter of future research =)
As for other, non-poisonous snakes – among them are also missing the “immunicon”. Especially this famous mussurana ( Clelia ) and some species of the genus Lampropeltis, often eating rattle snakes. By the way, our snakes also do not care for the poison of vipers ( Vipera berus and V. aspis ).
Mussurana eats rattlesnake
If you take the snakes are not immune and there are many other speeedo (logical).
Birds from this famous bird-Secretary that legal accidents cobras to death, and eagles of the genus Circaetus . often catching vipers…
From mammals is monstrous badgers-the honey robots, and hedgehogs and, of course, some mongooses ( Herpestidae ).