Guillain—Barré Syndrome following Primary Cytomegalovirus Infection: A Prospective Cohort Study

Background. Little is known about the epidemiology and the prognostic factors of Guillain—Barré syndrome (GBS) following primary infection with cytomegalovirus (CMV-GBS). Methods. We prospectively followed up 506 patients with cases of GBS who were admitted to our center from 1996 through 2006. We diagnosed 63 (12.4%) CMV-GBS cases by immunoglobulin (Ig) M detection and IgG avidity. Plasma CMV DNA was detected at hospital admission. Patient subgroups were compared using Fisher's exact test and the Wilcoxon rank-sum test. Temporal variations were analyzed with time series methods. Results. Patients with CMV-GBS were mostly young (median age, 32 years; sex ratio, 0.85), but we also identified a subpopulation of patients consisting of women aged >50 years. Sensory defects (in 72% of cases) and facial palsy (49%) were frequent, and test results positive for CMV DNA in plasma at hospital admission (found in 62% of cases) tended to be associated with objective sensory defect (P = .052). The main factors associated with long-term neurological sequelae (21%) were older age (P