MicrobialIdentificationSystemQualityChecker

Microbial Identification System Quality Checker — Control of Microbial Identification Quality

ℹ️  Utility checks reliability of microbial identification results (MALDI-TOF MS / Biochemical Systems):
   • Log Score (Confidence Index): ≥2.0 for species, ≥1.7 for genus
   • Discrimination Index (Difference from 2nd result): ≥0.2
   • Spectrum/Test Quality Status: Valid

⚠️  CRITICAL: Log Score < 1.7 means the microorganism is NOT IDENTIFIED!
   Confirmation by sequencing (16S rRNA) or other methods is required.

Usage:
 MicrobialIdentificationSystemQualityChecker.exe                            → demo mode (console output)
 MicrobialIdentificationSystemQualityChecker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,IsolateID,IdentifiedSpecies,LogScore,SecondBestLogScore,SpectrumQCStatus

Example:
 MICRO-ID-2026-001,ISO-001,Staphylococcus_aureus,2.45,1.80,Valid

— WHY IS THIS NEEDED?
Rapid and accurate identification of contaminants is critical for investigating deviations in sterile manufacturing.
• Systems like MALDI-TOF MS (Bruker, Shimadzu) or Vitek 2 are standards in modern microbiology labs.
• Log Score reflects the degree of similarity of the mass spectrum or biochemical profile with the database.
• High score (>2.0) ensures species-level identification with high probability.
• Automation eliminates risk of erroneous interpretation of borderline results by operators.

⚠️  CRITICAL:
• Database must be regularly updated and validated.
• Quality of colony isolation (purity of culture) directly affects spectrum quality.
• Low discrimination index (small difference between 1st and 2nd result) indicates system inability to reliably distinguish close species.
• Results with low scores must be sent for confirmatory testing.

Key features:
• Assessment of identification reliability by Log Score.
• Verification of result specificity (Discrimination Index).
• Control of technical spectrum/test quality.

Critical parameters:
• Log Score: >= 2.0 (Species), >= 1.7 (Genus)
• Discrimination Delta: >= 0.2
• Spectrum QC: Valid

💡 Usage tips:
1. Use standard protein extraction protocols for MALDI-TOF.
2. Regularly calibrate instrument using reference strains.
3. For rare microorganisms, check for entries in the database.
4. Save raw spectra for retrospective analysis upon database updates.
5. Integrate results with Contamination Trending System.

⚠️ Note: Unlike phenotypic methods, MALDI-TOF is based on protein profile analysis. This makes it fast but sensitive to cultivation conditions (colony age, medium).