Question 1

Which of the following viruses is most commonly associated with upper respiratory tract infections such as the common cold?

Accepted Answer

Rhinovirus

Question 2

What is the primary portal of entry for common cold viruses?

Accepted Answer

Nasal mucosa and conjunctival surface of the eyes

Question 3

Which factor does NOT directly affect the signs and symptoms of respiratory tract infections (RTIs)?

Accepted Answer

The color of the pathogen

Question 4

A patient presents with nasal stuffiness, itching, and watery nasal discharge lasting for 10 days. Which classification of rhinosinusitis is most likely?

Accepted Answer

Subacute rhinosinusitis

Question 5

Which antiviral drug is used to treat influenza and acts by inhibiting neuraminidase?

Accepted Answer

Oseltamivir

Question 6

Which type of influenza virus is most common and can infect multiple species?

Accepted Answer

Type A

Question 7

A hospital-acquired pneumonia is most likely caused by which of the following organisms?

Accepted Answer

Klebsiella pneumoniae

Question 8

Which of the following is a key feature of Mycobacterium tuberculosis that makes it difficult for the body to destroy?

Accepted Answer

Waxy capsule

Question 9

Which immune response is primarily responsible for controlling tuberculosis infection?

Accepted Answer

Cell-mediated immunity (T-cells)

Question 10

A positive tuberculin skin test indicates:

Accepted Answer

Previous infection and cell-mediated immune response to M. tuberculosis

Question 11

Histoplasmosis is most commonly acquired by:

Accepted Answer

Inhalation of spores from soil containing bird or bat droppings

Question 12

Which laboratory test provides the fastest diagnosis for histoplasmosis?

Accepted Answer

Antigen detection in blood or urine

Question 13

Dimorphic fungi exhibit which of the following growth patterns?

Accepted Answer

Grow as yeasts at body temperature and as molds at room temperature

Question 14

Which of the following is NOT a primary causative factor for lung cancer?

Accepted Answer

Vitamin C deficiency

Question 15

Which category of bronchogenic carcinoma is most closely related to smoking?

Accepted Answer

Squamous cell lung carcinoma

Question 16

A newborn develops respiratory distress syndrome (RDS). Which of the following best explains the underlying pathophysiology?

Accepted Answer

Immature Type II alveolar cells fail to produce enough surfactant, leading to high surface tension and alveolar collapse

Question 17

Which of the following is a common manifestation of respiratory failure in infants and children?

Accepted Answer

Nasal flaring and grunting during expiration

Question 18

Which equation best represents the relationship between surface tension ($$T$$), pressure ($$P$$), and radius ($$r) in $$the alveoli, relevant to respiratory distress syndrome?

Accepted Answer

$$P = \frac{2T}{r}$$

Question 19

Which of the following mechanisms is the most common way fungi spread to cause respiratory infections?

Accepted Answer

Inhalation of spores

Question 20

A patient with a history of chronic lung disease develops pneumonia after being hospitalized for two weeks. Which classification of pneumonia does this represent?

Accepted Answer

Hospital-acquired pneumonia

30 Patho

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