WaterMicrobiologyQualityChecker

Water Microbiology Quality Checker — Control of Water Microbiological Purity

ℹ️  Utility checks microbiological quality of Purified Water (PW) and Water for Injection (WFI) according to Ph. Eur. 2.6.12 and USP <1231>:
     • TAMC (Total Aerobic Microbial Count): ≤ 100 CFU/mL
     • TYMC (Total Yeast and Mold Count): ≤ 10 CFU/mL
     • Pseudomonas aeruginosa: Absent in 100 mL
     • Coliforms: Absent in 100 mL
     • Strict control of incubation conditions (TAMC: 30-35°C, 3-5 days; TYMC: 20-25°C, 5-7 days)

⚠️  CRITICAL: Detection of Pseudomonas aeruginosa or coliforms is unacceptable!
     TAMC exceedance > 100 CFU/mL indicates biofilm in water purification system or sampling violation.

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

Input format:
BatchNumber,WaterType,TAMC_CFU_per_ml,TYMC_CFU_per_ml,PseudomonasAeruginosa,Coliforms,IncubationTemp_TAMC,IncubationTemp_TYMC,IncubationDays_TAMC,IncubationDays_TYMC

Example (0=Absent, 1=Present):
  WMI-2026-PW-001,PW,5.0,2.0,0,0,32.5,22.5,4,6

— WHY IS THIS NEEDED?
Water is a main component of most dosage forms. Microbiological contamination of water can lead to product spoilage, reduced efficacy, and patient risk (especially for parenterals).
Regular bioburden monitoring is necessary for validation and maintenance of the water purification system.

⚠️  CRITICAL:
• TAMC ≤ 100 CFU/mL — standard limit for PW and WFI at point of use.
• TYMC ≤ 10 CFU/mL — control of fungal contamination.
• Sampling: Must be performed aseptically after disinfection of sampling point and flushing sufficient volume.
• Incubation: Violation of temperature regime or incubation time invalidates the test.
• Action Levels: Facility may have stricter internal limits (e.g., 50 CFU/mL) for early warning.

Key features:
• Check of total microbial counts (TAMC/TYMC)
• Control of absence of specific pathogens
• Validation of incubation parameters
• Generation of reports for microbiology lab and LIMS LabWare
• Compliance with GMP and Pharmacopoeia requirements

Critical parameters:
• TAMC: ≤ 100 CFU/mL
• TYMC: ≤ 10 CFU/mL
• Pseudomonas aeruginosa: Absent
• Coliforms: Absent
• TAMC Incubation: 30-35°C, 3-5 days
• TYMC Incubation: 20-25°C, 5-7 days

💡 Usage tips:
1. Filtration: For water with low bioburden, membrane filtration method (filtering 100 mL or more) is recommended.
2. Media: Use R2A agar for TAMC (more sensitive to water bacteria than TSA) and SDA or DG18 for TYMC.
3. Neutralization: If water contains residual disinfectants (chlorine, ozone), use neutralizers in media or during filter rinsing.
4. Trends: Analyze data dynamically. A sharp spike in bioburden even within limits may indicate a problem.
5. Biofilm: Main source of contamination is biofilm in pipes. Regular system sanitization is mandatory.

⚠️ Note: Water microbiology is an indicator of the entire water preparation system status. A positive result requires immediate investigation and possibly re-sanitization of the loop.