Central Nervous System Infections in Solid Organ Transplant Recipients: Results from the Swiss Transplant Cohort Study.

van den Bogaart, Lorena; Lang, Brian M; Rossi, Simona; Neofytos, Dionysios; Walti, Laura N; Khanna, Nina; Mueller, Nicolas J; Boggian, Katia; Garzoni, Christian; Mombelli, Matteo; Manuel, Oriol (2022). Central Nervous System Infections in Solid Organ Transplant Recipients: Results from the Swiss Transplant Cohort Study. Journal of infection, 85(1), pp. 1-7. Elsevier 10.1016/j.jinf.2022.05.019

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OBJECTIVES

To describe the epidemiology and clinical presentation of central nervous system (CNS) infections in solid organ transplant (SOT) recipients in the current era of transplantation.

METHODS

Patients from the Swiss Transplant Cohort Study (STCS) transplanted between 2008 and 2018 were included with a median follow-up of 3.8 years. Epidemiological, microbiological, and clinical data were extracted from the STCS database and patients' medical records. We calculated incidence rates and 90-day survival of transplant recipients with CNS infection.

RESULTS

Among 4762 patients, 42 episodes of CNS infection in 41 (0.8%) SOT recipients were identified, with an overall incidence rate of 2.06 per 1000 patient-years. Incidence of CNS infections was similar across all types of transplantations. Time to CNS infection onset ranged from 0.6 to 97 months after transplant. There were 22/42 (52.4%) cases of viral infections, 11/42 (26.2%) of fungal infections, 5/42 (11.9%) of bacterial infections and 4/42 (9.5%) of probable viral/bacterial etiology. Clinical presentation was meningitis/encephalitis in 25 cases (59.5%) and brain-space occupying lesions in 17 cases (40.5%). Twenty-three cases (60.5%) were considered opportunistic infections. Diagnosis were achieved mainly by brain biopsy/necropsy (15/42, 36%) or by cerebrospinal fluid analysis (20/42, 48%). Up to 40% of cases (17/42) had concurrent extra-neurological disease localizations. Overall, 90-day mortality rate was 29.0% (73.0% for fungal, 14.0% for viral and 11.0% for bacterial and probable infections, p<0.0001).

CONCLUSIONS

CNS infections were rare in the STCS, with viral meningoencephalitis being the most common disease. Fungal infections were associated with a high mortality.

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