Nocardia spp. Pneumonia in a Solid Organ Recipient: Role of Linezolid

Area of Science:

• Infectious Diseases
• Nephrology
• Pulmonology

Background:

• Renal transplant recipients are immunocompromised, increasing susceptibility to opportunistic infections.
• Nocardia species are uncommon pathogens causing severe pulmonary infections in immunocompromised individuals.

Observation:

• A 68-year-old renal transplant recipient developed pneumonia due to Nocardia pseudobrasiliensis, presenting with hypoxic respiratory failure.
• The patient had a sulfonamide allergy, precluding standard Nocardia treatment.
• Initial treatment with linezolid was effective but led to severe sensory neuropathy after four months.

Findings:

• Successful treatment of Nocardia pneumonia was achieved with linezolid followed by azithromycin.
• The patient experienced a complete clinical and radiological resolution of pneumonia and remained disease-free for four years.
• This case underscores the challenges in treating nocardiosis in patients with drug allergies or multidrug-resistant strains.

Implications:

• Highlights the need for alternative antimicrobial strategies for nocardiosis, especially in patients with sulfonamide allergies.
• Demonstrates the potential for severe, treatment-limiting side effects with prolonged linezolid use.
• Emphasizes careful monitoring for adverse events during long-term antibiotic therapy in transplant patients.