Question

1) A nematode with no circulatory system which produces coin lesions in lungs that can be mistaken as PTB (Pulmonary Tuberculosis). 2) Causative agent of Eosinophilic Meningoencephalitis? 3) TRUE OR FALSE. Ascaris lumbricoides exhibits 200,000 eggs/day. 4) Nematodes with sensory organs known as chemoreceptors are termed as? 5) The only parthenogenic nematode? 6) Why Enterobius vermicularis considered as the society worm?

Answer 1

1) Parasitic lung disease is different from pulmonary tuberculosis and malignancy. Coin lesion caused by a nematode having no circulatory system is a type of the focal lung lesion. In coin lesion, patients are mostly asymptomatic; some may have cough, chest pain, chills, fever, malaise etc. In pulmonary tuberculosis, patients experience cough, pain in chest areas, shortness of breath, fever, sweating, fatigue, loss of muscle, loss of appetite, malaise etc. Because of similarly in symptoms, these two conditions are confused.

2) Helminthic infections cause eosinophilic meningoencephalitis. One of the major causative agents is Angiostrongylus cantonensis. Other causative agents include Taenia solium, Gnathostoma spinigerum.

3) The statement is true. 200,000 eggs are exhibited per day by Ascaris lumbricoides. The shape of the fertilized egg is oval, 45-75 micrometer in length and 35-50 micrometer in width.

4) Nematodes having sensory organs are known as the chemoreceptors are termed as amphids. There are twelve sensory neurons containing ciliated dendrites in each amphid.

5) Name of the only parthenogenic nematode is Diploscapter pachys. It has survived as asexual.

6) Humans are the host for Enterobius vermicularis. They infect all members of the society irrespective of their gender, age or social status. That is why they are considered as society worm.