KCET 2014 Biology Solved Paper

Ascaris worms cause three kinds of damage:
• Larvae in the lung tissue cause Ascaris pneumonitis. Haemorrhage, edema and blockage of alveoli from worms, dead leucocytes and tissue debris are some of the effects
• Adult worms cause malnutrition by feeding mainly on the contents of the intestine. They also release toxic wastes that cause allergic reactions. A large number of worms can cause perforations. If this results in peritonitis, it can even be fatal.
• Wandering worms cause abscesses in the liver.