Percutaneous lung aspirate is:

a. acceptable.
b. not acceptable.


A
Because indigenous anaerobes are often present in large numbers as normal flora on mucosal surfaces, even minimal contamination of a specimen can give misleading results. Respiratory secretions that pass through the upper respiratory tract will likely be contaminated with upper respiratory tract flora, but those that are collected in such a way that protects the specimen are acceptable.

Biology & Microbiology

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