Vitamin A defintake of 1

Vit A def
intake of <180mcg retinol.
Causes:
1.Diarrhea
2worms
3increased metabolic demand in measles,RTI.
C/f:
1subclinical
rt,ut,intenst.Epith.affected
2early feat
defective dark adaptation
3xerophthalmia
who class
x1a-conjuctival xerosis
x1b-bitots spots
x2-corneal xerosis
x3a--"--- ulceration
x3b--"--"-->1/3cornea
XN Night blindness
XE Fundal changes
xs corneal scaring
Rx
50000,1lac,2lacIU in children <6mnth,6-12mont,>1yr
prevention
1lac unit vit a at 9months
TOXICITY
ACUTE
headache,vomiting,dizines
s/o raised ICT-PSUEDOTUMOR CEREBRI
CHRONIC
anorexia,itchy skin,wt loss
teratogenic