Vitamin A Defrecklinence Management

Definition and Clinical Presentation

Bitot spots are grey/white, foamy triangular or round-shaped lesions on the conjunctiva that represent a pathognomonic sign of vitamin A deficiency and require immediate high-dose vitamin A supplementation to prevent progression to irreversible blindness 1
Bitot spots represent an intermediate stage in the progression of xerophthalmia, occurring after night blindness but before keratomalacia 1, 2

Always assess for other signs of vitamin A deficiency including night blindness, conjunctival xerosis, and corneal involvement (xerophthalmia, keratomalacia, corneal ulceration) 3, 4
Measure serum retinol levels, though treatment should not be delayed waiting for results 1, 2
Normal serum retinol: >0.70 μmol/L (>20 μg/dL) 1
Critical caveat: Serum retinol decreases with inflammation, so adjust for inflammatory markers (CRP, AGP) when interpreting results 1, 2

For any patient presenting with Bitot spots, administer the full treatment schedule of oral vitamin A immediately: Day 1: 200,000 IU oral vitamin A, Day 2: 200,000 IU oral vitamin A, and 1-4 weeks later: 200,000 IU oral vitamin A for adults and children ≥12 months 3, 4, 8
For infants <12 months: Day 1: 100,000 IU oral vitamin A, Day 2: 100,000 IU oral vitamin A, and 1-4 weeks later: 100,000 IU oral vitamin A 3, 4, 8

After completing the 3-dose treatment schedule, continue preventive supplementation: Children 12 months to 5 years: 200,000 IU every 3 months, Infants <12 months: 100,000 IU every 3 months, and Lactating mothers: 200,000 IU within 2 months postpartum 3, 5, 9

Evaluate for severe malnutrition (weight-for-height Z-score <-3) which requires enrollment in therapeutic feeding programs 3, 4, 8
Screen for concurrent micronutrient deficiencies including iron, folate, and vitamin C 5, 6
Actively screen for vitamin A deficiency in patients with chronic liver disease, chronic alcohol consumers, malabsorption syndromes, post-bariatric surgery patients, and chronic kidney disease 1, 2, 10

Monitor for progression to keratomalacia (corneal softening with inflammation) or xerophthalmia (corneal maceration), which can lead to secondary infection and blindness 1, 2

Vitamin A toxicity is not a concern with the standard treatment protocol: Acute toxicity requires >300,000 IU in adults or >60,000 IU in children within hours to days 1, 8
The 200,000 IU dosing schedule is well below toxic thresholds 1, 8

Never delay treatment waiting for laboratory confirmation - Bitot spots are a clinical diagnosis requiring immediate intervention 3, 4
Do not assume normal serum retinol excludes deficiency in liver disease or chronic alcohol use - liver stores may be depleted despite normal serum levels 1, 2
Always complete the full 3-dose treatment schedule - single-dose therapy has unacceptably high relapse rates 3, 4
Screen for and treat concurrent infections - vitamin A deficiency increases susceptibility to respiratory and gastrointestinal infections that worsen outcomes 1, 2