KROK 1 2016 – Question 163 · KROK (Medicine) · Microbiology, Virology, and Immunology
A laboratory has been investigating virulence of a diphtheria agent. In the process of the experiment the infection was introduced intraperitoneally into test animals. The dosage of bacteria resulting in 95% mortality of test animals was found. What unit of virulence measurement was determined?
- A. LD5
- B. LD50
- C. DCL
- D. ID
- E. DLM
Hint
Compare the percentage of deaths given in the stem with the proportion of animals that each classical unit of lethal dose is defined to kill, and pick the unit that matches best.
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