Two community outbreaks of human infection with Yersinia enterocolitica

Area of Science:

• Microbiology
• Infectious Diseases
• Epidemiology

Background:

• Yersinia enterocolitica is a significant bacterial pathogen causing human infections worldwide.
• Community outbreaks of Yersinia enterocolitica are less commonly reported than sporadic cases.
• Previous research has identified various sources and transmission routes for Yersinia enterocolitica, including contaminated food and water.

Purpose of the Study:

• To describe two distinct community outbreaks of Yersinia enterocolitica infection in Shizuoka, Japan.
• To characterize the Yersinia enterocolitica strains involved in these outbreaks.
• To investigate the potential sources and modes of transmission for the identified outbreaks.

Main Methods:

• Epidemiological investigation of human cases.
• Bacteriological analysis of clinical isolates, including serotyping and biotyping.
• Environmental sampling and food source investigation were attempted.

Main Results:

• Two separate community outbreaks of Yersinia enterocolitica infection were identified in Shizuoka, Japan.
• All isolated strains belonged to Yersinia enterocolitica O antigen group 3, biotype 4.
• Despite extensive investigation, the definitive source and mode of spread for both outbreaks could not be established.

Conclusions:

• These represent the first reported community outbreaks of Yersinia enterocolitica in Japan, and potentially globally.
• The specific etiological agent was confirmed as Yersinia enterocolitica O:3, biotype 4.
• Further research is needed to elucidate common sources and transmission pathways for Yersinia enterocolitica community outbreaks.