Samples from bursae (olecranon, patellar, sub-acromial etc.) have always been for me in a bit of a “grey zone”, when it comes microbiological processing.
Not as critical as joint aspirates, but more important than superficial swabs.
We find it difficult to know exactly what to do with them in the microbiology lab, in terms of work-up, incubation period, and even communicating the results.
Bursa samples possibly need a section of their own within the manuals, so everyone is clear what to do with respect to them.
Best wishes for the holiday season!