Tissue and Biopsies (Bacteriology)
A biopsy may be defined as a portion of tissue removed from the
living body for further examination. Ideally these specimens should
be discussed with the laboratory prior to sampling to ensure that
transport and processing are timely and appropriate tests are
Collection container (including preservatives):
Tissue or biopsy material in a microbiologically CE marked leak
proof container without formalin
Specimen type: Tissue, Biopsy, ulcer biopsy
Collection: Collect specimens before
antimicrobial therapy where possible.
Specimen transport: Specimens should be
transported and processed as soon as possible
Minimum volume of sample: Large enough to carry
out all microscopy preparations and cultures.
Special precautions: If specimen is small,
place it in sterile water to prevent desiccation.
Measurement units: Not applicable
Biological reference units: Not applicable
Turn round time for provisional result (working
days): Gram stain: 30mins - 2hours within receipt into the
Microbiology laboratory, on request.
Culture: 1 day
Turn round time to final result (working days):
Clinical decision points: Not applicable
Factors known to significantly affect the
results: Specimens received in formol-saline are not
suitable for culture. If processing is delayed, refrigeration is
preferable to storage at ambient temperature. Delays of over 48 hr