Human Worms Advice And Signs HELP PLZ Or Any Advice My 5 Lb.4 Mo Old Puppy Has Ascariasis Type Round Worm That Humans Get & Giardia?

HELP PLZ or any advice my 5 lb.4 mo old puppy has ascariasis type round worm that humans get & giardia? - human worms advice and signs

My vet has called me a fenaendazole 5 pounds deworm my dog and I saw a dead worm in the stool with an inch long, may be there when I arrived? Can you tell the age of the worm due to its size?