Which component of the chain of infection is the microorganism that causes disease?
Correct answer: A. The infectious agent
- A. The infectious agent
- B. The source reservoir
- C. The portal of entry
- D. The susceptible host
Explanation
The infectious agent is the disease-producing microorganism, such as a bacterium, virus, parasite or fungus. A reservoir supports the organism, while the portal of entry is the route into the host.
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About Communicable Diseases
Communicable diseases are studied through the chain of infection, including the agent, reservoir, mode of transmission, portal of entry and susceptible host. Coverage includes isolation, disinfection, immunization, surveillance and outbreak control, with attention to diseases such as tuberculosis, malaria, hepatitis, polio and diarrheal infections.
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