
August 2022
Ampath | ampath.co.za
Overview
Severe pneumonia—including community-acquired (CAP), hospital-acquired (HAP), and ventilator-associated pneumonia (VAP)—remains a leading cause of morbidity and mortality.
Why this matters:
- Rapid and accurate pathogen identification:
- Supports antimicrobial stewardship
- Improves patient outcomes
- Aids infection control
- Helps tailor antibiotic therapy
About the Panel
The Biofire® FilmArray® Pneumonia Panel Plus is an FDA-cleared, CE-marked, multiplex nucleic acid amplification test for simultaneous detection of multiple pathogens and resistance markers.
Sample types:
- Sputum-like specimens: Sputum and tracheal aspirates
- Bronchoalveolar lavage (BAL)
Turnaround time:
- ~1 hour from sample loading
Specimen mnemonic:
- PNEUMOPCR
Laboratory TAT:
- 6 hours from receipt
Pathogens and Markers Detected
✅ Bacteria (Semi-quantified by DNA copy number)
Enterobacterales:
- Enterobacter cloacae complex
- Escherichia coli
- Klebsiella pneumoniae
- Klebsiella oxytoca
- Klebsiella aerogenes
- Proteus species
- Serratia marcescens
Non-lactose fermenters:
- Acinetobacter calcoaceticus–baumannii complex
- Pseudomonas aeruginosa
Gram-positive bacteria:
- Staphylococcus aureus
- Streptococcus agalactiae
- Streptococcus pneumoniae
- Streptococcus pyogenes
Other Gram-negative bacteria:
- Haemophilus influenzae
- Moraxella catarrhalis
✅ Atypical Bacteria:
- Chlamydophila pneumoniae
- Legionella pneumophila
- Mycoplasma pneumoniae
✅ Respiratory Viruses:
- Adenovirus
- Coronaviruses (seasonal)
- Human metapneumovirus
- Human rhinovirus/enterovirus
- Parainfluenza virus
- Influenza A
- Influenza B
- Respiratory Syncytial Virus (RSV)
- Middle East Respiratory Syndrome Coronavirus (MERS-CoV)
❗ Note: SARS-CoV-2 is not included in this panel.
✅ Antimicrobial Resistance Markers:
Gram-negative resistance genes:
- CTX-M (ESBL)
- OXA-48-like
- NDM
- VIM
- KPC
- IMP
Gram-positive resistance gene:
- mecA/C (for MRSA)
Performance
Sensitivity and specificity:
- Sputum-like specimens:
- Sensitivity: 96.3%
- Specificity: 97.2%
- Bronchoalveolar lavage specimens:
- Sensitivity: 96.2%
- Specificity: 98.3%
Semi-quantification bins for bacteria:
10⁴, 10⁵, 10⁶, and ≥10⁷ copies/mL
Important Notes & Considerations
- Interpret results carefully, especially in patients with:
- Prior hospital admissions
- Recent or ongoing antibiotic use
- Colonisation rather than active infection
- The panel detects DNA/RNA, not viability—positive results may reflect non-viable organisms.
- Only the resistance genes listed are detected.
- Culture remains essential for full susceptibility testing.
- Pathogens NOT detected by this panel (consider additional testing for):
- Mycobacterial species
- Cytomegalovirus (CMV)
- Pneumocystis jirovecii
- Aspergillus species
- Stenotrophomonas maltophilia
- Burkholderia cepacia complex
- Less common Enterobacterales linked to HAP/VAP
- Semi-quantitative data may overestimate pathogen load and may not match culture results.
🔍 Discuss complex or multi-pathogen results with your microbiologist.
📌 For pricing or medical aid reimbursement queries, contact your Ampath representative.
Continue Reading