Thanks for your query.
The stool report confirms worm infestation : a deworming course-repeated weekly for 3 weeks- will relieve you of diarrhea
For prevention of further episodes of diarrhea, drink purified water; avoid stale food, eating in hotels/restaurants.
Are you on Iron pills, which cause blackening of stools? If not, black stools suggest mild bleeding inside the intestine/stomach/duodenum
. Take PPIs for 2-3 months which will heal the injuries in the intestine caused by worms.
Also, take Probiotics and adequate vitamins
Hope I have answered your query.
Dr. R Karanwal