Can leptospirosis cause systemic illness such as fever, severe myalgia, headache, conjunctival redness, acute kidney injury, jaundice, hemorrhagic manifestations, or meningitis in a patient who is immunosuppressed from high‑dose steroids?

Yes, leptospirosis can absolutely cause all of these manifestations

Leptospirosis is fully capable of causing the entire constellation of symptoms described—fever, severe myalgia, headache, conjunctival redness (suffusion), acute kidney injury, jaundice, hemorrhagic manifestations, and meningitis—and this occurs regardless of immunosuppression status. 1

Clinical Presentation Spectrum

Leptospirosis presents along a spectrum from mild flu-like illness to severe, life-threatening disease (Weil's disease). The disease follows a characteristic biphasic course 1:

Bacteremic Phase (Days 1-7)

• Fever with rigors
• Severe myalgia, particularly of the calves
• Headache
• Conjunctival suffusion (a highly suggestive finding) 1

Immune Phase (Days 8-10 onward)

• Recurrent fever
• Hepatorenal syndrome with:
  • Acute kidney injury (often nonoliguric with hypokalemia) 2
  • Jaundice with mild transaminase elevation but high bilirubin 1
• Hemorrhagic manifestations due to capillary fragility (clotting tests often normal) 1
• Meningitis or meningoencephalitis 3
• Pulmonary hemorrhage/ARDS in severe cases 4

Key Diagnostic Features

The combination you describe is classic for leptospirosis. Conjunctival suffusion is particularly suggestive and should raise immediate suspicion 1. Look for:

• History of water/animal exposure (rats, dogs, cattle, flooding, recreational water sports) 1
• Proteinuria and hematuria on urinalysis 1
• Thrombocytopenia (65% of cases) 3
• Polymorphonuclear leukocytosis 1
• Renal failure with high bilirubin but only mild transaminase elevation 1

Critical Pitfall Regarding Immunosuppression

The severe immune phase of leptospirosis is actually immunologically mediated 1. This creates a theoretical concern that high-dose steroids might worsen outcomes. A systematic review found that corticosteroids are ineffective in severe leptospirosis and may increase nosocomial infections 5. The most recent Cochrane review (2025) confirms there is no evidence supporting corticosteroid use 6.

This means your immunosuppressed patient on high-dose steroids can still develop all these manifestations, but the steroids will not protect them and may actually complicate their course.

Management Approach

Start treatment immediately upon clinical suspicion—do not wait for serological confirmation 1:

• Penicillin or tetracycline antibiotics during the bacteremic phase 1
• For severe disease (Weil's disease with jaundice): intravenous penicillin G for 2 weeks 7
• Supportive care including renal replacement therapy if needed 7, 2
• Do not add corticosteroids despite the immunosuppression 5, 6

Prognostic Indicators

Two factors independently predict severe disease 3:

• Clinical jaundice (p=0.005)
• Cardiac involvement on exam or ECG (p<0.02)

Mortality in pulmonary hemorrhagic syndrome approaches 50%, with death typically occurring within 72 hours of symptom onset 4. Early recognition and antibiotic therapy are critical.