Aetiology of severe vitamin A deficiency in children.

BACKGROUND

Severe forms of vitamin A deficiency or keratomalacia are common in young children. Keratomalacia is thought to be associated with malnutrition due to poor weaning practices and manifests at 3 to 4 years of age. As survival rates for infants have increased, keratomalacia is being seen in children less than 6 months of age. Hence, keratomalacia shows two peaks--one in early infancy and the other in the toddler or pre-school age groups. However, the reasons for its occurrence at these ages may be different.

METHODS

Records of children admitted to the Nutrition Rehabilitation Centre at the Government Rajaji Hospital during 1971-89 and at the Aravind Children's Hospital during 1991-93 were reviewed for severity of vitamin A deficiency associated with protein-energy malnutrition. Records of 1990 were not available.

RESULTS

During 1971-89, 4691 children were admitted to the Nutrition Rehabilitation Centre for Nutritional rehabilitation and treatment of vitamin A deficiency. Of these, 1575 (33.6%) children had corneal involvement due to vitamin A deficiency. During 1991-93, 7439 children in the age group of 0-15 years were seen at the Aravind Children's Hospital--185 had vitamin A deficiency; 133 were below the age of 5 years and 69 had keratomalacia. Fifteen children with keratomalacia were below the age of one year and 12 were below 6 months of age.

CONCLUSION

The incidence of severe vitamin A deficiency of keratomalacia shows two peaks; one in early infancy (< 6 months) and the other in the pre-school age group. The first peak is probably related to maternal nutrition and decreased breast-feeding while the second peak is possibly related to poor weaning practices.