Palintest Legionella PRO On-Site Rapid Test Kit

Overview

The Palintest Legionella PRO On-Site Rapid Test Kit is a field-deployable lateral flow immunoassay engineered for the qualitative detection of Legionella pneumophila in water samples, with validated reactivity across serogroups 1 through 15. Unlike conventional culture-based methods—which rely on bacterial proliferation under selective conditions—the Legionella PRO employs highly specific monoclonal antibodies conjugated to colloidal gold nanoparticles to capture and visualize target antigens directly from environmental water matrices. This immunochromatographic principle enables detection of both culturable cells and viable but non-culturable (VBNC) forms, a physiologically dormant state induced by environmental stressors (e.g., chlorine exposure, nutrient limitation, temperature fluctuation), wherein bacteria retain metabolic activity and pathogenic potential but fail to grow on standard BCYE agar media. As such, the kit addresses a critical gap in routine legionellosis risk assessment: the underreporting of VBNC L. pneumophila that eludes ISO 11731–2 culture enumeration yet remains infectious.

Key Features

• 25-minute total assay time—from sample collection to visual result interpretation—enabling real-time decision support during routine monitoring or outbreak response.
• Tri-line test strip architecture: distinct capture lines for serogroup 1, pooled serogroups 2–15, and an internal procedural control line—ensuring analytical specificity and assay validity in a single run.
• No instrumentation required: fully self-contained, ambient-temperature stable format; no cold chain, centrifugation, enrichment, or reader device needed.
• Validated for diverse sample types: tap water, cooling tower sump water, hot water system returns, spa/pool fill water, and surface swabs from showerheads, storage tanks, and humidifiers.
• High functional sensitivity: LOD of 100 CFU/L in representative water matrices, as verified per DB/T 485–2020 protocol requirements and aligned with UK Health and Safety Executive (HSE) Action Levels for routine surveillance.

Sample Compatibility & Compliance

The Legionella PRO kit is compatible with unfiltered or minimally filtered (≤5 µm) water samples, including those containing low turbidity (<5 NTU) or residual disinfectants at typical operational concentrations (e.g., ≤0.5 mg/L free chlorine). Swab-based sampling using provided sterile polyester-tipped applicators allows direct surface testing of biofilm-prone fixtures without extraction steps. The method satisfies the technical performance criteria outlined in China’s DB/T 485–2020 “Rapid Detection Method for Legionella pneumophila in Water” and aligns with the UK HSE’s Approved Code of Practice L8 (2013, rev. 2022) for legionella risk management in water systems. While not intended for regulatory reporting in lieu of ISO 11731–2 culture confirmation, it serves as a primary screening tool compliant with GLP-aligned field protocols and supports audit-ready documentation when integrated into facility water safety plans (WSMPs).

Software & Data Management

As a non-instrumented, visual-read assay, the Legionella PRO does not require proprietary software or digital connectivity. However, its standardized result interpretation (positive/negative/invalid) integrates seamlessly into electronic maintenance management systems (CMMS) and water safety plan digital logs. Users may record batch number (e.g., 500500), sampling location, date/time, operator ID, and result image via mobile capture—supporting traceability and retrospective review. For laboratories operating under FDA 21 CFR Part 11 or EU Annex 11 frameworks, optional QR-coded lot-specific certificates of analysis (CoA) and printable result templates are available upon request to facilitate audit trails and data integrity compliance.

Applications

• Routine surveillance of domestic hot water (DHW) return lines and storage tanks in healthcare facilities, hotels, and residential high-rises.
• Pre-commissioning verification and post-shock chlorination validation in cooling towers and HVAC condensate systems.
• Investigative screening during suspected legionellosis cases—enabling rapid site triage prior to confirmatory ISO culture or qPCR.
• Validation of point-of-use filter efficacy and biofilm removal interventions on faucet aerators and showerheads.
• Training and competency assessment for facility engineers and water hygiene contractors under UK HSE or CIBSE TM13 guidance.

FAQ

Does this test detect non-pneumophila Legionella species?
No. The Legionella PRO is specifically designed for Legionella pneumophila serogroups 1–15 and does not cross-react with other Legionella species (e.g., L. longbeachae, L. micdadei).
Can results be quantified?
No. The assay provides qualitative (yes/no) detection only. Semi-quantitative estimation is not supported; signal intensity is not calibrated to concentration.
Is enrichment required?
No. Direct testing of water or swab extracts is performed without pre-enrichment, filtration, or centrifugation—consistent with field usability requirements.
How should negative results be interpreted in high-risk systems?
A negative result does not rule out presence below 100 CFU/L or non-target serogroups/species. Confirmatory ISO 11731–2 culture remains mandatory for regulatory compliance and outbreak investigation.
What is the shelf life and storage condition?
24 months from manufacture when stored at 2–30 °C; do not freeze. Kit components remain stable after opening for up to 1 hour under ambient laboratory conditions.