Aerococcus bacteremia associated with granulocytopenia.

Area of Science:

• Medical Microbiology
• Hematology
• Infectious Diseases

Background:

• Granulocytopenic patients with acute leukemia are susceptible to infections.
• Oral mucositis can serve as a portal of entry for pathogens.
• Aerococcus species are increasingly recognized as potential opportunistic pathogens.

Observation:

• Two cases of bacteremic infection caused by aerococci in granulocytopenic patients with acute leukemia and oral mucositis were documented.
• Bloodstream isolates from both patients exhibited resistance to prophylactic oral antibiotics.
• One patient succumbed to septic shock, while the other showed persistent high concentrations of aerococci in oral surveillance cultures.

Findings:

• Aerococcus bacteremia can lead to severe outcomes, including septic shock, in immunocompromised individuals.
• Antibiotic resistance in aerococci strains poses a significant challenge for infection control and treatment.
• Surveillance cultures revealed aerococci in a notable proportion of other acute leukemia patients, albeit at lower concentrations.

Implications:

• Enhanced surveillance for Aerococcus species is crucial in granulocytopenic patients, particularly those with oral mucositis.
• The findings underscore the importance of monitoring antibiotic resistance patterns in opportunistic pathogens.
• Further research is needed to understand the pathogenesis and optimal management of aerococcal infections in hematology-oncology settings.