The most common types of worms to infest humans are the digestive parasites, threadworms (also called as ‘Pinworms’) and ‘round worms’, all of which can be acquired by eating undercooked, infected meat or ingesting the eggs by eating dirt. Worms are particularly common in small children aged two to five years, who tend to play on the ground and put things in their mouth. The dirt they ingest can harbor eggs, which hatch in the intestine.
Infestation by worms can give rise to many symptoms like chronic fatigue, anemia, weight loss despite having an increased appetite, desire for sweets and chocolates, dark circles under the eyes, foul breath, decreased immunity, flatulence, constipation or diarrhea, irritability, nervousness, restlessness, etc; but different worms can give rise to different kinds of symptoms. The principle symptom of threadworms is itching around the anus at night. They may also cause periodic bouts of diarrhea alternating with constipation, loss of weight, cough and fever. Roundworms do not produce many symptoms until they have multiplied and then they may cause intestinal obstruction or symptoms like abdominal discomfort or pain, diarrhea, nausea and vomiting, loss of weight, fever and irritability. Hookworms may give rise to vomiting, epigastric pain, loose stools, anemia and nutritional disorders.