Determination of public health significance of VAD

COMMUNITY NUTRITION 3 (1+2)
Lesson 9 : Vitamin A Deficiency (VAD)

Determination of public health significance of VAD

The WHO /IVACG (International vit A consultative group) recommended the following criteria to decide the public health significance of VAD in any area.

Prevalence rates of xerophthalmia and vitamin A deficiency defining Public health significance

Sign/symptoms/Biochemical indications

% prevalence

Night blindness(XN)

>1.0

Bitot’s spots

>0.5

Corneal xerosis

>0.01

Cornear scar related to xerophthalmia (XS)

>0.05

Serum retinol level less than 10µg/dl

>5.0

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Last modified: Friday, 2 December 2011, 12:12 PM