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Zoonotic Bacterial Infections Triggering Cytokine Storm Syndrome.

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Zoonotic bacterial infections can cause severe hemophagocytic lymphohistiocytosis (HLH), also known as cytokine storm syndrome (CSS). Early recognition of symptoms like fever and low blood counts is crucial for managing these life-threatening conditions.

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Area of Science:

  • Infectious Diseases
  • Immunology
  • Hematology

Background:

  • Zoonotic infections pose significant health risks, with potential for severe systemic complications.
  • Hemophagocytic lymphohistiocytosis (HLH) and cytokine storm syndrome (CSS) are life-threatening hyperinflammatory conditions.
  • Bacterial pathogens are frequently implicated in zoonotic infections leading to HLH/CSS.

Purpose of the Study:

  • To highlight the association between zoonotic bacterial infections and HLH/CSS.
  • To review the spectrum of bacterial agents causing HLH/CSS.
  • To outline the common clinical presentations of these infections.

Main Methods:

  • Literature review of zoonotic bacterial infections associated with HLH/CSS.
  • Analysis of clinical manifestations reported in affected patients.

Main Results:

  • Bacteria are the most common cause of zoonotic infection-related HLH.
  • Key bacterial species implicated include Brucella spp., Rickettsia spp., Ehrlichia, Coxiella burnetii, Mycobacterium spp., and Bartonella spp.
  • Common symptoms include fever, cytopenias, and hepatosplenomegaly; rash, jaundice, and lymphadenopathy are less frequent.

Conclusions:

  • Zoonotic bacterial infections are a critical, often under-recognized, cause of HLH/CSS.
  • Prompt diagnosis and management are essential for improving patient outcomes.
  • Awareness of causative agents and clinical signs is vital for clinicians.