Test Name: MYCOBACTERIA CX (CF)
EPIC Search Term: LABCFAFB
Synonyms: AFB CULTURE MYCOBACTERIAL CULTURE MAI CULTURE MAC CULTURE ACID FAST CULTURE
Panel Composition: For patients diagnosed with Cystic fibrosis.
Acid fast bacteria (Mycobacteria) culture
Acid fast bacteria stain
Cultures positive for acid fast bacteria are referred to ARUP Laboratory for identification and susceptibility testing when applicable.
Preferred Container: 1 x Sterile Container
Sample Type: Lower Respiratory specimens
Minimum Volume: 5-10 mL
Special Collection Instructions: Sputum or Tracheal aspirate - Early morning specimen. Collect specimen on 3 consecutive days early morning as soon as patient awakens. Volume should be 5-10 mL obtained from deep cough (not spit) and placed in sterile container.
Specimen Information: This test should be ordered on patients with Cystic fibrosis only and only on Respiratory specimens.
Specimen Transport: Deliver sample to lab immediately.
Causes for Rejection: Specimens collected on swabs are not acceptable and will be rejected without prior approval of the Microbiology Medical Director or clinical pathologist on call.
Testing Frequency: Specimens inoculated M-TH 0700-1000, Friday 0700-1100.
AFB stains read M-F 0700 - 1530.
Cultures read daily M-F. Negative reports updated weekly on Tuesday.
Expected Turn Around Time: Negative cultures - 42-49 days.
Reference Ranges: Culture - No Acid Fast Bacilli Isolated
Stain - No Acid Fast Bacilli Seen.
Test Performed By: Texas Children's Hospital Pathology Services

Available at TCH Main Campus: 832-824-5152
6621 Fannin, MC 1-2261
Houston, TX 77030-2399
Lab Section: Microbiology