If you have blood in your stool, I think you might want to get a colonoscopy. Nothing to mess with.
Clarkia has all the paracide thingies that you need in it.
Whether you went to Haiti & picked up some especially virulent parasites or not, apparently everyone has them anyway and needs to do a cleanse, & keep up maintainence.
They are ev er y where and as insidious as hell.