Which structure is a common portal of entry for pathogens causing intestinal infection?
Correct answer: B. The gastrointestinal tract
- A. The intact skin surface
- B. The gastrointestinal tract
- C. The external ear canal
- D. The hair shaft
Explanation
The gastrointestinal tract is a portal of entry when contaminated food or water is swallowed. Intact skin usually prevents entry, while hair and the external ear canal are not typical routes for intestinal infection.
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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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