**Question:** All the following are features of Tropical Pulmonary Eosinophilia except -

A. Pleural effusion
B. Hypoxia
C. Tachypnea
D. Fatigue

**Core Concept:** Tropical Pulmonary Eosinophilia (TPE) is a respiratory disorder primarily seen in regions with high humidity and temperature, particularly in Southeast Asia, Africa, and the Indian subcontinent. It is caused by a hypersensitivity reaction to endemic parasites, particularly filarial worms like Wuchereria bancrofti, Brugia malayi, or Brugia timori. The condition is characterized by eosinophilia, pulmonary infiltrates, and pleural effusion.

**Why the Correct Answer is Right:** Pleural effusion is a common feature of TPE due to the accumulation of fluid in the pleural space, which can be exudative or transudative. Pleural effusions are not typically excluded from the manifestations of TPE.

**Why Each Wrong Option is Incorrect:**

Option B (Hypoxia): Hypoxia is a potential consequence of TPE due to lung involvement, but it is not specific to this condition and can be seen in other pulmonary disorders.

Option C (Tachypnea): Tachypnea is a respiratory manifestation that may be observed in TPE, but it can also be present in various respiratory conditions, making it not exclusive to TPE.

Option D (Fatigue): Fatigue is a general symptom that can be attributed to various causes and is not a unique feature of TPE.

**Why the Correct Answer is Right:** Fatigue is a non-specific symptom that can be attributed to a wide range of conditions and is not specific to TPE.

**Clinical Pearl:** Tropical Pulmonary Eosinophilia is often challenging to diagnose due to its nonspecific symptoms and signs. A thorough clinical history, physical examination, and investigations are required to identify the endemic area, exposure to filarial worms, and confirm eosinophilia, which aids in making a definitive diagnosis.