Diversity among French Bacillus anthracis isolates.

Area of Science:

• Veterinary epidemiology
• Microbial genetics
• Zoonotic disease research

Background:

• Regular outbreaks of animal anthrax (Bacillus anthracis) occur in France.
• Epidemiological links between these anthrax outbreaks are poorly understood.
• Understanding the genetic diversity of Bacillus anthracis is crucial for tracking disease spread.

Purpose of the Study:

• To investigate the genetic diversity and epidemiological links of Bacillus anthracis isolates in France.
• To identify distinct genotypes and their geographical distribution.
• To improve understanding of anthrax transmission dynamics.

Main Methods:

• Utilized eight-locus multilocus variable-number tandem repeat analysis (MLVA) typing.
• Analyzed a collection of 50 Bacillus anthracis isolates from France.
• Compared genetic profiles to identify distinct genotypes and clusters.

Main Results:

• Identified eight distinct Bacillus anthracis genotypes within the French isolates.
• These genotypes belonged to two dissimilar genetic clusters.
• Observed clear regional strain patterns: B2 genotypes were prevalent in southern France, and A1a genotypes were found exclusively in northern France.

Conclusions:

• Multilocus variable-number tandem repeat analysis effectively differentiates Bacillus anthracis strains in France.
• Distinct genetic clusters and regional prevalence of specific genotypes suggest localized transmission patterns.
• Further research into the epidemiology of animal anthrax in France is warranted based on these genetic findings.