Theoretically, mebendazole use is restricted to those parasites that are only in the GI tract with no risk of reproduction/dissemination (wishful thinking). More important, sometimes, than knowing what you are treating, is knowing what ELSE may be cohabitating inside of you. For instance, a little girl presenting with sypmtoms of intestinal parasites with abdominal distress etc, and visually ID as hookworms given mebendazole and succumbed to an undiagnosed case of strongyloidiasis. This means she actually DIED folks and that it was preventable!!
ALSO, many fail to grasp the tenacity to which these critters cling to life in several different life forms. Everytime we kill a batch of the adults you have now set the stage for a brand new reinfection stage more likely stronger and wider that the previous
Know your enemies and WHO those atom bombs (drugs) are created for