Infections due to Yersinia enterocolitica serotypes O:2,3 and O:4 acquired in South Florida

Area of Science:

• Microbiology
• Infectious Diseases
• Public Health

Background:

• Yersinia enterocolitica is a bacterial pathogen known to cause gastrointestinal illness and other infections.
• While common in temperate climates, its prevalence in semitropical regions warrants further investigation.

Observation:

• This report details four recent cases of Yersinia enterocolitica infection diagnosed in Florida.
• Two cases manifested as acute mesenteric lymphadenitis, a common presentation in children.
• The remaining two cases presented with septicemia, a more severe systemic infection.

Findings:

• Three of the four Yersinia enterocolitica isolates belonged to the uncommon serotype O:2,3.
• The fourth isolate was identified as serotype O:5.
• These serotypes are less frequently reported in the United States compared to others.

Implications:

• The findings suggest a potential increase in Yersinia enterocolitica occurrence in semitropical areas of the U.S.
• The identification of uncommon serotypes may indicate evolving epidemiology or regional adaptation.
• Further surveillance and research are needed to understand the public health implications of these infections in new geographic areas.