Community outbreak of Yersinia pseudotuberculosis

Area of Science:

• Microbiology
• Epidemiology
• Infectious Diseases

Background:

• Yersinia pseudotuberculosis is a bacterial pathogen that can cause various illnesses.
• Community outbreaks of Yersinia pseudotuberculosis are rare and require thorough investigation.
• This report details the first conclusive community outbreak of Yersinia pseudotuberculosis.

Purpose of the Study:

• To describe the epidemiology and characteristics of a Yersinia pseudotuberculosis outbreak.
• To identify the causative agent and its serotype.
• To assess the immune response in affected individuals.

Main Methods:

• Clinical data collection from affected individuals (pupils, teachers, food attendant).
• Microbiological analysis to detect and isolate causative organisms from patients.
• Serological testing (agglutinin titers) on pupil sera to determine immune response.

Main Results:

• A total of 535 pupils, 5 teachers, and 1 food attendant contracted Yersinia pseudotuberculosis.
• Causative organisms were identified in 19 out of 30 tested patients, all belonging to serotype VA.
• 488 out of 653 pupils exhibited elevated agglutinin titers, indicating infection.

Conclusions:

• The study confirms a significant community outbreak of Yersinia pseudotuberculosis in Kurashiki, Japan.
• Serotype VA was identified as the causative agent.
• The findings highlight the importance of surveillance and rapid response to bacterial outbreaks.