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Question

Difficulty: MediumHuman Physiology, Health, and Diseases

Among the following infectious human diseases, which one is caused by a bacterial pathogen rather than a viral, protozoan, or fungal organism?

  1. DiphtheriaAnswer
  2. B
    Yellow Fever
  3. C
    Toxoplasmosis
  4. D
    Histoplasmosis

Answer

Diphtheria is the disease caused by a bacterial pathogen (Corynebacterium diphtheriae).
Diphtheria is an infection of the upper respiratory tract or skin caused by the Gram-positive bacterium Corynebacterium diphtheriae.

Step-by-Step Solution

1
Identify the causative organism for each disease listed in the choices.
Diphtheria is caused by Corynebacterium diphtheriae (bacterium); Yellow Fever is caused by Flavivirus (virus); Toxoplasmosis is caused by Toxoplasma gondii (protozoan); Histoplasmosis is caused by Histoplasma capsulatum (fungus).
Classifying each disease by its etiology helps isolate the bacterial disease.
2
Select the choice matching the bacterial pathogen requirement.
Diphtheria is the only bacterial infection among the options.
The question specifically asks for the disease caused by a bacterium.

Key Concept

Human Infectious Diseases and Pathogen Etiology
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Topics

Human Physiology, Health, and Diseases

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