Answer to Question 1
A catheter is inserted into the narrowed coronary artery and positioned at the site of constriction; a stent is inflated under high pressure to crush plaque and open up the arterial lumen; stent left in place allowing connective tissue and smooth muscle cells to grow through the mesh followed by the proliferation of endothelial cells. Drug-releasing stents may be used to reduce the rate of stenosis and plaque formation that may require redilatation.
Answer to Question 2
About 400,000 people were infected from a municipal water supply as a result of oocyst contamination of the pool water by infected persons using the pool. Oocysts on the perianal skin of these infected people were released while swimming and infected other individuals.
