This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 2 (Helminthology), Subject name: Microbiology
Which is not a feature of tropical eosinophilia - 
Select and explain. 
A. Eosinophilia more than 3000/mm3, B. Microfilaria in tissue, C. Microfilaria in blood, D. Lymphadenopathy
C: Microfilaria in blood
Answer: C: Microfilaria in blood 
Explanation: Option 1, 2, 3, 4 Occult filariasis or Tropical pulmonary eosinophilia (TPE): It is also called as Occult Filariasis or Weingaen's Syndrome or Meyers Kouwenaar Syndrome. It is a hypersensitivity reaction against microfilarial antigen of W. bancroftiandBrugia malayMicrofilaria are rapidly cleaned from the blood steam and filtered, lodged and destroyed in lungs initiating allergy response. Hence, microfilaria is not detected in peripheral blood. Common features: nocturnal paroxysmal cough and wheezing, weight loss, low grade fever. perpheral eosinophilia is >3000/mm3 Ocassionally, microfilariae are entrapped in other organs like speen, liver and lymphnodes leading to hepatosplenomagely and lymphadenopathy. This is called as Meyers Kouwenaar Syndrome.