With a lot of parasites, when they die the tissue around them calcifies (just your body’s response). That’s what we are seeing on the radiograph.

calcification, the immune system, combined with the parasite walling off the infection. the parasite itself secretes chemicals to suppress the local immune system, thats why you dont see massive immune response to so many. if the parasites suddenly die it can be a problem for the host. theres also studies going on that non-deadly parasites are result of modulating autoimmune diseases as well.