PANDAS
Post-Streptococcal Neuropsychiatric Autoimmune Disorder
Primary risk age: 3 to 12 Years (Pre-pubertal pediatric onset)
- Urgency
- Moderate
- Typical age
- 3 to 12 Years (Pre-pubertal pediatric onset)
- Body system
- Developmental & Behavioral
Typical course: Weeks to months depending on antibiotic response and symptom management.
Reviewed against AAP · CDC · WHO · NHS guidance Last reviewed 2026-06-13
1. Summary & Pathophysiology
Post-Streptococcal Neuropsychiatric Autoimmune Disorder
Pathophysiology (Development Path)
Streptococcal antibodies created during infection cross-react with proteins in the basal ganglia of the brain (molecular mimicry). This triggers localized neuroinflammation, disrupting neurotransmitter pathways and causing a sudden onset of tics, compulsions, and emotional instability.
Primary Causes & Etiology
Autoimmune cross-reactivity following an infection with Group A Beta-Hemolytic Streptococcus (GAS), such as strep throat or scarlet fever.
2. Symptom Continuum
- Early Onset Signs
Abrupt, "overnight" onset of severe obsessive-compulsive behaviors (symmetry compulsions, contamination fears) or motor/vocal tics.
- Progressive Phase
Severe separation anxiety, emotional lability (sudden rage or crying), deterioration in handwriting and fine motor control, and insomnia.
- Severe Indicators
Sensory sensitivities, urinary frequency or bedwetting, food restriction due to choking or contamination fears, and panic episodes.
3. Clinical Verification
Clinical diagnosis based on five criteria: OCD/tics onset, pediatric age, abrupt/episodic course, temporal association with GAS infection (proven by throat culture or ASLO titers), and neurological abnormalities.
4. Care & Elements Plan
Primary Care Treatment Plan
Eradicate streptococcal infection with antibiotics. Address OCD/tics with cognitive behavioral therapy (CBT). Consider immunomodulation (IVIG/plasmapheresis) for severe cases.
Home Support Elements
Create a supportive, low-stress environment. Reassure the child during behavioral flares. Implement school writing/time accommodations as motor control fluctuates.
Generic Active Ingredients (No Brands)
- Amoxicillin or Azithromycin (generic antibiotic active elements to eradicate streptococcal triggers)
- Ibuprofen (generic NSAID to reduce neuroinflammation).
Lists active elements only. Never administer self-designed therapies.
5. Doctor Critical Lines
Critical Thresholds: When to See a Doctor
Seek pediatric consultation immediately if a child exhibits a sudden, dramatic change in behavior, severe OCD symptoms, tics, or separation anxiety, particularly after strep throat.
6. Vaccine & Prevention
Routine Prophylaxis (Prevention)
Promptly diagnose and fully treat all Group A Streptococcal throat infections with a complete course of antibiotics.
Immunization Context
No immunization exists for Group A Streptococcus.
7. Timelines & Outlook
Active Timeline
Weeks to months depending on antibiotic response and symptom management.
Expected Prognosis
Variable; many experience complete recovery after antibiotic course, but symptoms can flare with subsequent streptococcal exposure.
Potential Untreated Complications
Chronic severe OCD, nutritional deficiency from food refusal, separation anxiety interfering with schooling.
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