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Detection and Isolation of Campylobacter spp. from Raw Meat
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Detection and Isolation of Campylobacter spp. from Raw Meat

Published on: February 23, 2024

Multilocus sequence typing of Campylobacter jejuni from broilers.

Petra Griekspoor1, Eva Olsson Engvall, Björn Olsen

  • 1Section for Zoonotic Ecology and Epidemiology, University of Kalmar, SE-391 82 Kalmar, Sweden.

Veterinary Microbiology
|September 8, 2009
PubMed
Summary
This summary is machine-generated.

Genetic diversity of Campylobacter jejuni in Swedish broilers was studied using multilocus sequencing typing (MLST). Most isolates matched known broiler genotypes, but environmental sources may also influence Campylobacter jejuni in poultry.

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Culture Methods to Determine the Limit of Detection and Survival in Transport Media of Campylobacter Jejuni in Human Fecal Specimens

Published on: March 10, 2020

Area of Science:

  • Microbiology
  • Bacterial genetics
  • Food safety

Background:

  • Campylobacter jejuni is a leading cause of bacterial gastroenteritis globally.
  • Poultry, particularly broilers, are a major reservoir for C. jejuni.
  • Understanding the genetic diversity of C. jejuni in broilers is crucial for effective control strategies.

Purpose of the Study:

  • To investigate the genetic diversity of Campylobacter jejuni isolates from Swedish broilers.
  • To compare genetic profiles obtained through pulsed-field gel electrophoresis (PFGE) and multilocus sequencing typing (MLST).
  • To identify potential sources and transmission routes of C. jejuni in broiler populations.

Main Methods:

  • Multilocus sequencing typing (MLST) was employed to genotype 100 C. jejuni isolates from Swedish broilers.
  • Isolates were initially characterized using pulsed-field gel electrophoresis (PFGE).
  • Sequence types (STs) and clonal complexes were analyzed and compared to existing databases.

Main Results:

  • MLST identified 44 distinct sequence types (STs), while PFGE revealed 69 types, indicating higher discriminatory power of MLST.
  • Eighteen novel STs were discovered, and 26 STs belonged to previously defined clonal complexes.
  • While most isolates belonged to genotypes commonly found in broilers and humans, three clonal complexes (ST-206, ST-677, ST-1034) typically associated with wild birds and environmental sources were also detected.

Conclusions:

  • The genetic makeup of C. jejuni in Swedish broilers is largely consistent with previously identified broiler-associated genotypes.
  • The presence of genotypes linked to environmental sources suggests potential transmission pathways influencing broiler C. jejuni populations.
  • Environmental surveillance and control measures may be important for reducing C. jejuni contamination in poultry.