Overview
CEN ISO/TS 17919:2013 - Microbiology of the food chain - PCR for the detection of food‑borne pathogens - Detection of botulinum type A, B, E and F neurotoxin‑producing clostridia - is a horizontal technical specification for molecular detection of clostridia carrying genes for botulinum neurotoxins (BoNT) types A, B, E and F. The method targets genetic sequences (DNA) encoding BoNTs, not the active toxins; therefore a PCR-positive result does not necessarily indicate the presence of toxin in the sample. The specification applies to products for human consumption, animal feed, and environmental samples.
Key Topics and Requirements
- Scope and principle: outlines a PCR‑based workflow for detecting BoNT gene targets across diverse sample matrices.
- Sample handling: requirements for sample preparation and microbial enrichment prior to nucleic acid extraction.
- Nucleic acid extraction: guidance on extracting DNA from enriched cultures and environmental/food matrices.
- PCR amplification and detection: describes amplification strategies and detection options (end‑point and real‑time). Annexes include:
- Annex B - Multiplex PCR assays with agarose gel electrophoresis (informative).
- Annex C - Real‑time PCR assays for BoNT types A, B, E, F (informative).
- Annex D - preparation of C. botulinum spores (informative).
- Confirmation: procedures for confirming positive PCR results and interpreting gene detection versus toxin presence.
- Reagents, equipment and controls: lists essential media, PCR reagents, instrumentation and quality controls needed for reliable detection.
- Regulatory and intellectual property notice: the document flags potential patent claims related to some elements (patent holder contact is provided in the original text).
Applications and Who Uses It
CEN ISO/TS 17919:2013 is intended for:
- Food safety laboratories and commercial testing labs performing molecular surveillance for botulinum‑related hazards.
- Public health and clinical reference laboratories monitoring outbreak sources or environmental reservoirs.
- Feed manufacturers and quality teams assessing animal feed contamination risks.
- Research institutions studying distribution and genetics of BoNT‑producing Clostridia.
Practical uses include routine screening, outbreak investigation support, environmental monitoring and method standardization across laboratories.
Related Standards
- Part of the ISO “Microbiology of the food chain” family of documents covering PCR methods for food‑borne pathogen detection and developed in collaboration between ISO/TC 34 and CEN/TC 275. Laboratories typically implement ISO/TS 17919 alongside other ISO methods for food microbiology and confirmatory toxin assays when toxin presence must be demonstrated.
Keywords: ISO/TS 17919:2013, PCR, botulinum, Clostridium botulinum, botulinum neurotoxin, food microbiology, food safety, real‑time PCR, multiplex PCR, animal feed, environmental sampling.