In an Experiment to Determine the Infectious Dose for a Specific

question 61

Multiple Choice

In an experiment to determine the infectious dose for a specific organism, 50% of the test subjects must develop the disease following a specific dose. This is quantified as the (ID₅₀) and is a measure of the pathogenicity of that organism. Assess the following data from an experiment involving 200 mice and determine the ID₅₀ for the infectious agent. Infectious Dose Living Mice Dead Mice
10³ 190 10
10⁴ 150 50
10⁵ 120 80
10⁶ 100 100
10⁷ 0 200

• A) 10³ organisms
• B) 10⁴ organisms
• C) 10⁵ organisms
• D) 10⁶ organisms

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Definitions:

Allergens

Substances that are recognized by the immune system and can cause an allergic reaction in susceptible individuals.

Coronary Artery

An artery supplying blood to the heart muscle, critical for providing oxygen and nutrients to the heart.

Bypassing

The act of avoiding or circumventing an obstacle or pathway, often used in medical terms to describe surgical procedures that reroute bodily functions.

Blockage

An obstruction that prevents movement or flow, often referring to the clogging of passages or pathways in biological or mechanical systems.