Document Detail

Neurotoxin gene profiling of clostridium botulinum types C and D native to different countries within Europe.
MedLine Citation:
PMID:  22344654     Owner:  NLM     Status:  MEDLINE    
Clostridium botulinum types C and D, as well as their mosaic variants C-D and D-C, are associated with avian and mammalian botulism. This study reports on the development of low-density macroarrays based on the GeneDisc cycler platform (Pall-GeneDisc Technologies) applied to the simultaneous detection of the C. botulinum subtypes C, C-D, D, and D-C. The limit of detection of the PCR assays was 38 fg of total DNA, corresponding to 15 genome copies. Artificially contaminated samples of cecum showed a limit of detection below 50 spores/g. The tests were performed with a large variety of bacterial strains, including C. botulinum types C (n = 12), C-D (n = 29), D (n = 5), and D-C (n = 10), other botulinum neurotoxin (BoNT)-producing Clostridium strains (n = 20), non-BoNT-producing clostridia (n = 20), and other bacterial species (n = 23), and showed a high specificity. These PCR assays were compared to previously published real-time PCRs for the detection of C. botulinum in 292 samples collected from cases of botulism events in four European regions. The majority of the samples originated from wild birds (n = 108), poultry (n = 60), and bovines (n = 56). Among the 292 samples, 144 were positive for either the bont/C-D or the bont/D-C gene by using the GeneDisc arrays. The reliability of the results tallied to 97.94%. Interestingly, only BoNT mosaics, types C-D and D-C, were found in naturally contaminated samples whatever their animal origin and their geographical location. Further investigations should now be performed in order to check that mosaic types dominate in Europe and that acquisition of mosaic types helps in survival or adaptation to particular niche.
Cedric Woudstra; Hanna Skarin; Fabrizio Anniballi; Lucia Fenicia; Luca Bano; Ilenia Drigo; Miriam Koene; Marie-Hélène Bäyon-Auboyer; Jean-Philippe Buffereau; Dario De Medici; Patrick Fach
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-02-17
Journal Detail:
Title:  Applied and environmental microbiology     Volume:  78     ISSN:  1098-5336     ISO Abbreviation:  Appl. Environ. Microbiol.     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-04-11     Completed Date:  2012-07-13     Revised Date:  2013-06-26    
Medline Journal Info:
Nlm Unique ID:  7605801     Medline TA:  Appl Environ Microbiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3120-7     Citation Subset:  IM    
ANSES (French Agency for Food, Environmental and Occupational Health Safety), Food Safety Laboratory, Maisons-Alfort, France.
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MeSH Terms
Bacteriological Techniques / methods*
Botulinum Toxins / analysis*,  classification,  genetics
Botulism / diagnosis*
Clostridium botulinum / genetics,  isolation & purification*
Feces / microbiology
Genetic Variation*
Nucleic Acid Hybridization / methods
Polymerase Chain Reaction / methods
Sensitivity and Specificity
Reg. No./Substance:
0/botulinum toxin type C; 0/botulinum toxin type D; EC Toxins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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