The type of specimen collected for mycobacterial studies that must be neutralized with 10% sodium carbonate is:
a. spontaneously produced sputum.
b. gastric lavage.
c. transtracheal aspiration.
d. bronchial lavage.
B
Many specimen types, other than respiratory samples, contain normal flora and require deconta-mination and concentration. Gastric lavages should be processed within 4 hours of collection or neutralized with 10% sodium carbonate and refrigerated until processed as for sputum.
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