Clinical Scorecard: Utilization of Phage Immunoprecipitation Sequencing for Diagnosing Enterovirus D68 as a Contributing Factor in Guillain-Barré Syndrome Cases

At a Glance

Key Highlights

• GBS often follows respiratory or gastrointestinal infections, with enterovirus D68 recently implicated as a trigger.
• Phage immunoprecipitation sequencing (PhIP-Seq) can detect intrathecal antibodies in cerebrospinal fluid to support etiological diagnosis when direct pathogen detection is inconclusive.
• A severe pediatric GBS case with prior EV-D68 respiratory infection was confirmed by detecting CSF antibodies using PhIP-Seq.

Guideline-Based Recommendations

Diagnosis

• Consider GBS diagnosis in patients with progressive symmetric ascending weakness and pain, especially following recent infection.
• Use clinical examination including reflex testing and cranial nerve assessment.
• Employ MRI imaging to detect nerve root enhancement supporting diagnosis.
• Utilize PhIP-Seq for detecting intrathecal antibodies against suspected pathogens when CSF PCR is negative or inconclusive.

Management

• Monitor respiratory function closely due to risk of respiratory failure requiring intubation.
• Provide supportive care in PICU including respiratory support and vasopressors for autonomic instability.
• Early recognition and treatment of GBS variants such as AIDP are critical.

Monitoring & Follow-up

• Regular neurological assessments to track progression of weakness and cranial nerve involvement.
• Monitor respiratory status and autonomic function vigilantly.
• Follow antibody levels and clinical response where applicable.

Risks

• Rapid progression to respiratory failure and cranial nerve dysfunction.
• Potential for autonomic instability requiring vasopressor support.
• Diagnostic delays due to low pathogen yield in CSF testing.

Patient & Prescribing Data

Pediatric patients with suspected GBS and antecedent respiratory infections including EV-D68

PhIP-Seq can aid in confirming infectious etiology to guide diagnosis and management, especially when conventional CSF pathogen detection is negative.

Clinical Best Practices

• Obtain paired serum and CSF samples early in the disease course for antibody profiling.
• Use PhIP-Seq to detect intrathecal antibody production against enterovirus D68 and other pathogens.
• Integrate clinical, imaging, and advanced serological data for comprehensive diagnosis.
• Provide multidisciplinary care in PICU with readiness for respiratory and autonomic support.

References

• GBS incidence and clinical features
• Phage immunoprecipitation sequencing methodology
• Enterovirus D68 and neurological complications