Shigella species

Background

• Gram-negative bacillus that is closely related to Escherichia coli
• Automated methods frequently misidentify as Escherichia coli, so needs phenotypic testing with serology
• Needs azithromycin susceptibility to be requested specifically, if it is resistant to others
  • However, there are no standardized breakpoints, so you have to use the epidemiologic cutoff values

Clinical Manifestations

Post-Infectious Complications

• Hemolytic-uremic syndrome
• Reactive arthritis
• Seizures