LD50/30 represents the dose that would cause death in what proportion of exposed individuals within 30 days?

LD50/30 represents the dose that would cause death in what proportion of exposed individuals within 30 days?

• A. 25%
• B. 50%
• C. 75%
• D. 90%

Answer: (B)

LD50/30 is the dose that would be lethal to 50% of exposed individuals within 30 days after exposure. The key is the 50% figure, which is the median lethal dose, and the 30 specifies the observation window used to count deaths. In toxicology, this metric lets us compare how toxic different substances are: a lower LD50/30 means higher acute toxicity, since a smaller dose kills half the population within a month. So the proportion described by LD50/30 is 50% of those exposed, within 30 days.

LD50/30 is the dose that would be lethal to 50% of exposed individuals within 30 days after exposure. The key is the 50% figure, which is the median lethal dose, and the 30 specifies the observation window used to count deaths. In toxicology, this metric lets us compare how toxic different substances are: a lower LD50/30 means higher acute toxicity, since a smaller dose kills half the population within a month. So the proportion described by LD50/30 is 50% of those exposed, within 30 days.