A 45-year-old man with diabetes developed a chronic cough and intermittent fever. A chest radiograph resulted in a preliminary diagnosis of tuberculosis. However, the patient is tuberculin test negative. An employment history revealed that he is a heating contractor who installed ductwork on the roofs and in the attics of old buildings that were bird-nesting sites. Tissue biopsy from a pulmonary lymph node was taken. This specimen would MOST LIKELY reveal macrophages filled with:
A. Acid-fast bacilli
B. Yeast cells
C. Trophozoites
D. Merozoites
Answer:B
A 45-year-old man with diabetes developed a chronic cough and intermittent fever. A chest radiograph resulted in a preliminary diagnosis of tuberculosis. However, the patient is tuberculin test negative. An employment history revealed that he is a heating contractor who installed ductwork on the roofs and in the attics of old buildings that were bird-nesting sites. Tissue biopsy from a pulmonary lymph node was taken. This specimen would MOST LIKELY reveal macrophages filled with:
A. Acid-fast bacilli B. Yeast cells C. Trophozoites D. Merozoites