Which of the following diseases is caused in humans by ascaris?
(A) Tuberculosis
(B) Taeniasis
(C) Both A and B
(D) Ascariasis

Hint: The Ascaris is the roundworm that is capable of causing diseases in the human and the pigs. These are the internal parasites that live in the intestine of the human and the pigs causing diseases. Their whole lifecycle gets completed in the single host only.

Complete Answer:
- Among the given options, tuberculosis is caused by the mycobacterium tuberculosis and it is the air borne disease.
- The taeniasis is the numerous disease that is caused by the fungus. It includes ringworm, dandruff, jock itch and the athlete’s foot. They do not cause any serious ill effects but they cause uncomfortable to the infected person. Hence these both are not caused by Ascaris. Ascariasis is the disease caused by the ascaris lumbricoides.
- They have the body of the long, thread like body which is tapered at both ends. They are present in the gastrointestinal tract of the human and hence they are called as the internal parasites.
- These ascaris takes the nutrition of the man and also sometimes feeds the mucous layer of the stomach or intestine causing pain in the abdomen. The symptoms of the ascariasis is vomiting, frequent diarrhea, fever and the presence of the worms in the stools of the affected person.

Thus the option (D) is correct.

Note: The eggs of these worms may reach the external environment through the infected man’s faces. From there, it passes to the healthy man by the contaminated food. Hence these eggs may pass through the bloodstream and reach the intestine and hatch there producing more worms.