HRH Bio-Secure Aerosol Pathogen Transmission System for Animal Models

Overview

The HRH Bio-Secure Aerosol Pathogen Transmission System for Animal Models is an integrated, Class III biological safety-compliant exposure chamber engineered specifically for controlled investigation of respiratory pathogen transmission dynamics among small and medium-sized laboratory animals. Designed to operate within a certified Class III biosafety cabinet, the system enables rigorous experimental modeling of three primary transmission routes—direct contact, short-range droplet transmission (≤5 cm), and long-range aerosol transmission (up to 1.5 m)—under fully contained, personnel- and environment-protected conditions. Its operational architecture adheres to the airflow containment, structural integrity, and leakage performance requirements specified in RB/T 199–2015, ensuring validated biosafety integrity across all exposure configurations. The system supports longitudinal studies involving non-human primates (e.g., cynomolgus macaques), ferrets, guinea pigs, rats, and mice, with dedicated restraint interfaces for NHP handling and routine procedural access (e.g., serial blood sampling, oropharyngeal swabbing) without compromising containment.

Key Features

• Class III BSC-integrated design with dual-stage HEPA filtration on exhaust and pre-filtered inflow; all filters equipped with validated decontamination and integrity test ports per ISO 14644-3 and EN 1822 standards
• Configurable airflow control: 1–50 L/min for rodent cohorts; 20–100 L/min for non-human primate exposures—each independently adjustable and digitally logged
• Real-time environmental monitoring of O₂, CO₂, NH₃, temperature (±0.3°C), and relative humidity (±2% RH) with automated threshold-based acoustic-optical alarms
• Modular animal housing compartments with large-radius internal corners to eliminate shadow zones and facilitate vaporized hydrogen peroxide (VHP) decontamination cycles
• Dedicated bioaerosol sampling port calibrated for 28.3 L/min volumetric flow, compatible with standard impingers (e.g., AGI-30), cyclones, and filter cassettes per ISO 15544 and ASTM D6300
• Embedded industrial-grade controller with audit-trail-enabled software supporting protocol scheduling, parameter logging, and event-triggered data capture

Sample Compatibility & Compliance

The system accommodates species-specific housing modules for Macaca fascicularis, Mustela putorius furo, Cavia porcellus, Rattus norvegicus, and Mus musculus, with optional customization for weight- and behavior-matched cohort configurations. All exposure protocols are designed to comply with GB 14925–2010 for ambient environmental parameters during housing and challenge phases. Structural sealing performance meets RB/T 199–2015 Class III BSC work-area leakage limits (≤1 × 10⁻⁶ m³/s at 125 Pa differential pressure). The system supports GLP-aligned study execution through traceable calibration records, user-access-level permissions, and electronic signature-capable workflow logs.

Software & Data Management

The HRH Control Suite v3.2 provides a deterministic real-time operating environment compliant with IEC 62304 Class B software safety requirements. It features time-synchronized acquisition of airflow rates, gas concentrations, and chamber climate variables at 1 Hz resolution. Data exports are generated in CSV and HDF5 formats, with metadata embedded per MIAME/ISA-Tab conventions. Audit trails record all user actions—including parameter modifications, alarm acknowledgments, and calibration events—with immutable timestamps and operator IDs. Optional integration with LIMS platforms is supported via HL7 v2.5.1 and RESTful API endpoints, enabling alignment with FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed in regulated preclinical research settings.

Applications

This system is deployed in high-containment virology and immunology laboratories for mechanistic studies of influenza A virus, SARS-CoV-2, Mycobacterium tuberculosis, and other WHO Risk Group 3 pathogens. Typical use cases include: quantification of transmission efficiency across strain variants under controlled humidity gradients; evaluation of antiviral prophylaxis impact on aerosol-mediated spread; comparative assessment of mucosal immune responses following droplet versus aerosol challenge; and validation of personal protective equipment (PPE) and ventilation interventions using surrogate pathogen aerosols. Its modular architecture also permits adaptation for inhalation toxicology studies requiring precise aerosol dosimetry and concurrent physiological telemetry.

FAQ

Does the system support simultaneous multi-species exposure within a single run?
No. Each experimental run is configured for a single species cohort to maintain consistent airflow dynamics, exposure geometry, and behavioral confinement parameters.
Can the chamber be validated for ISO 14644-1 Class 5 cleanroom equivalence during operation?
While not rated as a cleanroom, the internal airflow uniformity and particle removal efficiency meet or exceed ISO 14644-1 Class 5 criteria for airborne particulate concentration (<3,520 particles/m³ ≥0.5 µm) when operated at nominal flow rates with intact HEPA filters.
Is third-party certification for RB/T 199–2015 compliance included with delivery?
Yes. A full factory-issued biosafety performance report—covering containment integrity, airflow velocity mapping, and filter leak testing—is provided prior to commissioning.
What maintenance intervals are recommended for HEPA filters and sensor calibration?
HEPA filters require integrity testing every 6 months and replacement every 24 months under continuous operation; environmental sensors are calibrated annually against NIST-traceable references.
Can the system interface with external telemetry systems for ECG or core temperature monitoring?
Yes. Analog and digital I/O ports support synchronization with commercial telemetry platforms (e.g., Data Sciences International, Ponemah) via TTL triggers and analog voltage inputs.