Abstract：
:Clostridium botulinum group III is mainly responsible for botulism in animals. It could lead to high animal mortality rates and, therefore, represents a major environmental and economic concern. Strains of this group harbor the botulinum toxin locus on an unstable bacteriophage. Since the release of the first complete C. botulinum group III genome sequence (strain BKT015925), strains have been found to contain others mobile elements encoding for toxin components. In this study, seven assays targeting toxin genes present on the genetic mobile elements of C. botulinum group III were developed with the objective to better characterize C. botulinum group III strains. The investigation of 110 C. botulinum group III strains and 519 naturally contaminated samples collected during botulism outbreaks in Europe showed alpha-toxin and C2-I/C2-II markers to be systematically associated with type C/D bont-positive samples, which may indicate an important role of these elements in the pathogenicity mechanisms. On the contrary, bont type D/C strains and the related positive samples appeared to contain almost none of the markers tested. Interestingly, 31 bont-negative samples collected on farms after a botulism outbreak revealed to be positive for some of the genetic mobile elements tested. This suggests loss of the bont phage, either in farm environment after the outbreak or during laboratory handling.
journal_name
Anaerobejournal_title
Anaerobeauthors
Woudstra C,Le Maréchal C,Souillard R,Anniballi F,Auricchio B,Bano L,Bayon-Auboyer MH,Koene M,Mermoud I,Brito RB,Lobato FCF,Silva ROS,Dorner MB,Fach Pdoi
10.1016/j.anaerobe.2017.12.009subject
Has Abstractpub_date
2018-02-01 00:00:00pages
71-77eissn
1075-9964issn
1095-8274pii
S1075-9964(17)30232-9journal_volume
49pub_type
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