<prompt> One of the intestinal enzymes that are generally deficient in children following an attack of severe infectious enteritis isLactaseTrypsinLipaseAmylase  <response>: Because Lactase activity in the mucosa is at best marginal, this enzyme is particularly likely to be depleted secondary to diffuse mucosal disease - NelsonCauses of Acquired Lactase deficiency1. Acute Infective enteritisViral gastroenteritis Bacterial gastroenteritis 2. Cystic fibrosis 3. Protein-energy malnutrition 4. Cows milk protein intolerance 5. Prolonged use of drugs like Neomycin. 