A 45-year-old man presents with fever, cough, and chest pain. A chest X-ray shows a cavitary lesion in the right upper lobe. Which microorganism is most likely responsible for this condition?
Practice Questions
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Q1
A 45-year-old man presents with fever, cough, and chest pain. A chest X-ray shows a cavitary lesion in the right upper lobe. Which microorganism is most likely responsible for this condition?
Streptococcus pneumoniae
Mycobacterium tuberculosis
Klebsiella pneumoniae
Legionella pneumophila
The cavitary lesion in the right upper lobe is characteristic of pulmonary tuberculosis, which is caused by Mycobacterium tuberculosis.
Questions & Step-by-step Solutions
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Q
Q: A 45-year-old man presents with fever, cough, and chest pain. A chest X-ray shows a cavitary lesion in the right upper lobe. Which microorganism is most likely responsible for this condition?
Solution: The cavitary lesion in the right upper lobe is characteristic of pulmonary tuberculosis, which is caused by Mycobacterium tuberculosis.
Steps: 7
Step 1: A 45-year-old man has symptoms: fever, cough, and chest pain.
Step 2: A chest X-ray is done to look at his lungs.
Step 3: The X-ray shows a cavitary lesion in the right upper lobe of the lung.
Step 4: Cavitary lesions in the lungs are often associated with certain infections.
Step 5: One common cause of cavitary lesions in the lungs is pulmonary tuberculosis.
Step 6: Pulmonary tuberculosis is caused by a bacterium called Mycobacterium tuberculosis.
Step 7: Therefore, the microorganism most likely responsible for this man's condition is Mycobacterium tuberculosis.
