Which of the following specimens are commonly collected as the first step in identification of a pathogen? 1. Blood 2. Urine 3. Sputum 4. Pleural fluid 5. Stool
a. 4 and 5 only
b. 2 and 3 only
c. 1, 2, and 4 only
d. 1, 2, 3, 4, and 5
ANS: D
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