Parasitosis caused by toxocara canis eggs, found in the feces of parasitized young dogs.
The scenario is as follows: your child has dirt or "dirty" sand in his mouth and becomes infected. The mechanism of infestation is very fast. The eggs will hatch and give birth in the digestive tract to the larvae. The latter will migrate and colonize certain organs such as the lung or the liver.
Your child will be a little tired, feverish. He is afraid to cough or complain of stomach ache. Only a blood test reports on the parasitosis.