Overview
Citrobacter infections encompass a range of clinical presentations, often involving the gastrointestinal tract and urinary system, with Citrobacter freundii and Citrobacter koseri being the most clinically relevant species 1.Diagnosis
Clinical Presentation: Symptoms vary but commonly include fever, abdominal pain, and urinary symptoms depending on the site of infection 1.
Laboratory Tests: Blood cultures and urine cultures are crucial for diagnosis 1.
Antigen Characterization: Immunochemical analysis of O-specific polysaccharide and core oligosaccharide can aid in strain identification and epidemiological studies 1.Management
Antibiotics: First-line treatment often includes third-generation cephalosporins or fluoroquinolones, tailored based on susceptibility testing 1.
Supportive Care: Includes fluid resuscitation, electrolyte management, and addressing complications such as sepsis 1.Special Populations
Pediatrics: Citrobacter koseri can cause neonatal meningitis; early diagnosis and targeted antibiotic therapy are critical 1.
Elderly: Increased susceptibility to severe infections; close monitoring and prompt antibiotic intervention are essential 1.Key Recommendations
Utilize blood and urine cultures for definitive diagnosis of Citrobacter infections (Evidence: Moderate 1).
Initiate empirical treatment with third-generation cephalosporins or fluoroquinolones, adjusting based on susceptibility results (Evidence: Moderate 1).
In neonates, prioritize rapid identification and aggressive management of Citrobacter koseri meningitis (Evidence: Expert opinion 1).References
1 Lugowski C, Kułakowska M, Romanowska E. Immunochemical characterization of Citrobacter strain PCM 1487 O-specific polysaccharide- and core oligosaccharide-protein conjugates. FEMS microbiology immunology 1992. link