Bacteria-Associated Cytokine Storm Syndrome.

Area of Science:

• Immunology
• Infectious Diseases
• Critical Care Medicine

Background:

• Cytokine storm syndromes (CSS) are severe inflammatory conditions often triggered by infections.
• While viruses are common causes, bacterial pathogens, particularly intracellular ones, are increasingly implicated in CSS.
• The clinical presentation of CSS can mimic sepsis or multi-organ dysfunction, complicating diagnosis.

Purpose of the Study:

• To highlight the significant role of bacterial infections as precipitants of cytokine storm syndromes.
• To emphasize the importance of recognizing and treating bacterial infections in patients with CSS.
• To discuss common bacterial causes of CSS, with a focus on pediatric cases.

Main Methods:

• Review of literature and clinical case discussions focusing on bacterial precipitants of CSS.
• Analysis of diagnostic challenges and criteria for CSS, including HLH-2004 and condition-specific criteria.
• Emphasis on clinical suspicion and diagnostic equipoise between CSS and bacterial infections.

Main Results:

• Bacterial infections are frequently reported triggers for CSS, often presenting subtly.
• Delayed diagnosis of underlying bacterial infections can occur due to overlapping clinical features with CSS.
• Prompt treatment of identified bacterial infections is essential for optimal CSS management.

Conclusions:

• Cytokine storm syndromes should be suspected in critically ill patients with sepsis-like symptoms or multi-organ dysfunction.
• A high index of suspicion is required to diagnose CSS, especially when bacterial infections are the underlying cause.
• Maintaining diagnostic equipoise between CSS and bacterial infections is vital for timely and effective treatment.