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The Gaboon viper (Bitis gabonica), also called the Gaboon adder, is a large and highly venomous viper species found in the rainforests and savannas of sub-Saharan Africa. [ 1 ] [ 3 ] [ 2 ] Like all other vipers, it is venomous .
This test is often referred to as dilute Russell's viper venom time (dRVVT). The coagulant in the venom directly activates factor X, which turns prothrombin into thrombin in the presence of factor V and phospholipid. The venom is diluted to give a clotting time of 23 to 27 seconds and the phospholipid is reduced to make the test extremely ...
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The venom glands are relatively small. Unlike most vipers, Fea's viper is oviparous and hibernates during the winter. [3] The color pattern of Fea's viper is striking; dorsally, its basic body color is a shiny, deep blue-gray to black, marked by several widely spaced, thin (one or two scales), white-orange crossbands.
Macrovipera lebetinus, known as the blunt-nosed viper, Lebetine viper, Levant viper, [3] and by other common names, is a viper species found in North Africa, much of the Middle East, and as far east as Kashmir. Like all other vipers, it is venomous. Five subspecies are currently recognized, including the nominate race described here. [4]
Some snake venom zinc metalloproteinases [14] consist of an N-terminal catalytic domain fused to a disintegrin domain. Such is the case for trimerelysin I (HR1B), atrolysin E (Ht-e) and trigramin. It has been suggested that these proteinases are able to cleave themselves from the disintegrin domains and that the latter may arise from such a ...
In most instances, the viper injects a venom that tends to immobilize, not kill, its prey before ingestion. In this case, the main venom glands secrete a toxin that inhibits the prey's sympathetic response to flee or fend off its predator. This essentially stuns the animal so that the predator can easily attack. [18]
The Crotalinae, commonly known as pit vipers, [2] [3] or pit adders, are a subfamily of vipers found in Asia and the Americas. Like all other vipers, they are venomous.They are distinguished by the presence of a heat-sensing pit organ located between the eye and the nostril on both sides of the head.