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Infectious Cycle of Pathogens Quiz

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Questions and Answers

What is the best method for preventing illnesses transmitted by water, food, and direct contact?

Sanitation (correct)

Antibiotics

Vaccination

Immune system boosters

Which of the following is a characteristic of E. coli?

1µm diameter, ~2µm length

~1µm diameter, 2µm length (correct)

2µm diameter, ~1µm length

~2µm diameter, 1µm length

What is the primary factor limiting the impact of vaccination in preventing infections?

Insufficient government support

Ineffective vaccine delivery systems

Limited by research and development (correct)

Lack of public awareness

What is the main function of bacterial capsules?

Prevent phagocytosis by PMN. Signup and view all the answers

How do bacteria within biofilms resist antimicrobial agents?

By forming a physical barrier against antimicrobial agents. Signup and view all the answers

How does antigenic variation occur in Neisseria gonorrhoeae pilin?

Via homologous recombination between the expressed locus (pilE) and a silent locus (pilS). Signup and view all the answers

What is the approximate size range of viruses?

0.002-0.2 μm Signup and view all the answers

Which of the following organisms possess a defined nucleus and other organelles?

Fungi Signup and view all the answers

Which type of microorganism contains noncellular, infectious proteins?

Parasites Signup and view all the answers

Which mechanism is NOT used by bacterial toxins to inhibit host cells?

Protein synthesis inhibitors Signup and view all the answers

Which bacterial organism causes severe watery diarrhea and belongs to the O1 and O139 serotypes?

Vibrio cholerae Signup and view all the answers

What is the primary treatment for the disease caused by Vibrio cholerae?

Oral rehydration Signup and view all the answers

Which characteristic is NOT associated with Vibrio cholerae?

Non-motile Signup and view all the answers

What is the virulence factor responsible for causing severe watery diarrhea in Vibrio cholerae infection?

Cholera toxin Signup and view all the answers

Who is at risk of Vibrio cholerae infection and when are they at risk?

Children and adults in developing countries, during rainy seasons Signup and view all the answers