Countstar Mira FL Pro Microbial Cell Analyzer

Overview

The Countstar Mira FL Pro Microbial Cell Analyzer is a high-precision, automated imaging-based cell counter engineered for quantitative analysis of microbial and sub-micron biological particles—including Escherichia coli, Pichia pastoris, Saccharomyces cerevisiae, platelets, and microalgae such as Chlorella. Unlike conventional flow cytometry or Coulter-based systems, the Mira FL Pro employs brightfield and fluorescence microscopy coupled with fixed-focus optical architecture and AI-driven image segmentation to deliver reproducible, morphology-aware enumeration and viability assessment. Its 10× objective lens—optimized for small-particle resolution—and 8.3 megapixel CMOS sensor enable reliable detection of objects ranging from ~1 µm to 20 µm in diameter, bridging a critical gap between traditional hemocytometer manual counting and high-end flow platforms. Designed for QC laboratories, bioprocess development teams, and academic microbiology cores, the instrument operates on a standardized 20 µL sample volume and delivers results within 20–50 seconds per assay—without dilution, calibration beads, or fluidic complexity.

Key Features

• Fixed-focus optical system eliminates autofocus drift and ensures consistent focal plane across repeated measurements—critical for inter-run comparability in longitudinal studies or process monitoring.
• AI-powered image analysis engine trained on diverse microbial morphologies (rods, ovoids, spheres, chains) enables adaptive thresholding and object classification without manual parameter tuning.
• Dual-mode detection: simultaneous brightfield counting and dual-channel fluorescence (e.g., Acridine Orange/Propidium Iodide or Calcein AM/PI) for membrane integrity–based viability assessment.
• Modular consumable compatibility: supports both legacy Countstar standard chambers and newly engineered 60-µm-deep chambers optimized for low-sedimentation-rate microbes and platelets.
• GMP-ready architecture: role-based user permissions, electronic signatures, full audit trail, and secure data export—validated against FDA 21 CFR Part 11 requirements.
• Integrated 3Q validation package (Installation Qualification, Operational Qualification, Performance Qualification) with protocol templates and test reports for rapid regulatory acceptance.

Sample Compatibility & Compliance

The Mira FL Pro demonstrates robust performance across Gram-negative bacteria (E. coli), methylotrophic yeasts (P. pastoris), and budding yeasts (S. cerevisiae), as well as eukaryotic micro-particles including human platelets and Chlorella vulgaris. Its optical design minimizes diffraction-limited blurring at sub-5 µm dimensions, while the AI classifier distinguishes clustered cells from debris based on texture, edge gradient, and aspect ratio—not just intensity or size thresholds. The system complies with ISO 20391-1:2018 (cell counting methodology standards) and supports GLP/GMP workflows through configurable data retention policies, encrypted database storage, and seamless integration with LIMS via CSV or XML export. All firmware and software revisions are version-controlled and documented per ICH Q9 risk management principles.

Software & Data Management

The embedded Countstar Analysis Suite v4.x provides intuitive workflow navigation, real-time image preview, and batch processing for up to five samples in sequence. Each measurement generates a comprehensive report including total count, viable count, viability %, coefficient of variation (CV%), particle size distribution histogram, and annotated fluorescence overlay images. Raw TIFF stacks and processed metadata are stored with immutable timestamps and operator IDs. Server synchronization enables centralized backup to network-attached storage (NAS) or cloud repositories; optional printer drivers support direct PDF report generation with institutional letterhead and digital signature embedding. Audit logs record all user actions—including parameter changes, result overrides, and export events—with tamper-evident hashing compliant with 21 CFR Part 11 Subpart B.

Applications

• Biopharmaceutical upstream process monitoring: rapid yeast or bacterial titer assessment during fermentation and seed train expansion.
• Vaccine manufacturing QC: quantification of microbial cell banks and working stocks prior to cryopreservation or passage.
• Cell therapy R&D: platelet enumeration and functional viability testing using Calcein AM staining protocols aligned with ISCT guidelines.
• Microalgal biotechnology: growth kinetics tracking of Chlorella and Nannochloropsis under varying nutrient or light conditions.
• Antibiotic susceptibility screening: time-kill curve analysis via serial imaging of treated E. coli cultures over 24 h.
• Educational laboratories: hands-on training in microbial enumeration, fluorescence microscopy, and digital image analysis fundamentals.

FAQ

What is the minimum detectable particle size with the Mira FL Pro?
The system reliably resolves particles ≥1 µm in diameter under optimal staining and chamber loading conditions, validated using NIST-traceable silica microspheres and cultured E. coli strains.
Does the instrument require daily calibration or maintenance?
No routine optical recalibration is needed due to the fixed-focus design; however, periodic verification using Countstar’s QC microsphere kit (Cat. No. CS-QC-01) is recommended per ISO 20391-2 for continued accuracy assurance.
Can third-party counting chambers be used?
Only Countstar-branded chambers—standard depth (100 µm) and high-resolution 60-µm variants—are supported to ensure consistent meniscus formation, depth-dependent magnification correction, and AI model alignment.
Is remote software update supported?
Yes, firmware and application updates can be deployed via secure HTTPS connection using authenticated administrator credentials; all updates include SHA-256 checksum verification and rollback capability.
How is data integrity ensured during power failure or unexpected shutdown?
The system implements atomic write operations and journaling file system (ext4) to prevent partial saves; unsaved image buffers are retained in non-volatile RAM and recovered upon restart.