Question:
Which of the following is NOT an example of direct transmission in communicable diseases?
Which of the following is NOT an example of direct transmission in communicable diseases?
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Airborne respiratory spread is classed as indirect transmission.
Updated On: Jun 23, 2026
- Transplacental (vertical)
- Soil
- Respiratory
- STD
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The Correct Option is C
Solution and Explanation
Step 1: Modes of transmission are grouped into direct and indirect. Direct transmission includes direct contact, droplet infection, contact with soil, inoculation into skin or mucosa, and transplacental (vertical) transmission. Step 2: Sexually transmitted disease (option D) is spread by direct contact, contact with soil (option B) is listed under direct transmission, and transplacental spread (option A) is direct vertical transmission, so all three are direct. Step 3: Indirect transmission includes vehicle-borne (water, food, milk), vector-borne, and airborne spread. Step 4: Respiratory transmission (option C), in the sense of airborne droplet nuclei suspended in air, falls under indirect (airborne) transmission rather than direct droplet contact, making it the correct negative answer here.
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