Final answer:
Mucosal injury in secondary lactase deficiency can have multiple causes, including genetic defects, infections, and gastrointestinal surgeries. Avoiding lactose-containing foods and using lactase supplements can help manage the condition.
Step-by-step explanation:
Mucosal injury in secondary lactase deficiency can be caused by a number of factors. Some major causes include:
- Genetic defects in the synthesis of lactase enzyme
- Infections that damage the intestinal lining
- Gastrointestinal surgeries or diseases that remove or damage the lactase-producing cells
- Chemotherapy or radiation therapy that affect the small intestine
These factors can lead to a decrease in lactase production, making it difficult for the body to digest lactose and resulting in mucosal injury. Avoiding lactose-containing foods and taking lactase supplements can help alleviate the symptoms.