Lethal dose of krait venom: AP 11
**Core Concept**
The lethal dose of krait venom refers to the amount of venom required to cause death in a human being. Kraits are a species of venomous snakes that belong to the cobra family. Their venom is a complex mixture of enzymes and proteins that can cause respiratory failure, cardiac arrest, and renal failure.
**Why the Correct Answer is Right**
The lethal dose of krait venom is estimated to be around 100-150 mg. This is a relatively small amount of venom, which is due to the high potency of krait venom. Krait venom contains a number of neurotoxins, including cobratoxin, which can cause neuromuscular blockade and respiratory failure. The venom also contains phospholipase A2, which can cause hemolysis and renal failure.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it is not a commonly reported lethal dose of krait venom.
**Option B:** This option is incorrect as it is a lower dose than the estimated lethal dose of krait venom.
**Option C:** This option is incorrect as it is a higher dose than the estimated lethal dose of krait venom.
**Clinical Pearl / High-Yield Fact**
Krait venom is highly potent and can cause death with a relatively small amount of venom. This is why it is essential to seek medical attention immediately if bitten by a krait.
**Correct Answer:** D. 150 mg