A doctor is treating a patient with viper snake bite. He should not forget that viper venom is:
## Core Concept
Viper snake venom is a complex mixture of bioactive molecules, including enzymes and non-enzymatic proteins. The venom primarily causes **hemotoxic** effects, leading to coagulopathy, renal failure, and local tissue necrosis. Understanding the composition and effects of viper venom is crucial for managing snakebite patients effectively.
## Why the Correct Answer is Right
The correct answer, **C. Hemotoxic**, is right because viper venom contains a variety of enzymes, such as **phospholipase A2**, **jararhagin**, and **viperin**, which disrupt cell membranes, induce inflammation, and interfere with the coagulation cascade. This results in a consumptive coagulopathy, characterized by **defibrination**, **thrombocytopenia**, and **prolonged clotting times**. The hemotoxic effects of viper venom are well-documented and guide the treatment approach for viper snakebites.
## Why Each Wrong Option is Incorrect
**Option A:** Neurotoxic - This is incorrect because neurotoxic effects are more characteristic of **elapid** snake venom (e.g., cobras, kraits), which primarily affects the nervous system by blocking **acetylcholine receptors** or mimicking **acetylcholine** at synapses.
**Option B:** Cytotoxic - While viper venom does have cytotoxic effects, contributing to local tissue necrosis, this option is too broad and does not specifically capture the primary toxic effect of viper venom, which is **hemotoxicity**.
**Option D:** Myotoxic - This is incorrect because myotoxic effects, which primarily damage muscle tissue, are more commonly associated with certain **sea snake** venoms.
## Clinical Pearl / High-Yield Fact
A key clinical pearl for managing viper snakebites is the importance of **early administration of antivenom** to neutralize the venom and prevent progression of systemic and local effects. Additionally, **supportive care**, including monitoring for coagulopathy and renal failure, is critical in the management of these patients.
## Correct Answer: C. Hemotoxic