Patient came in due to cough and fever for 3 days and he has episodic cough for 5 years , what is the probable diagnosis
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asthma AND cough
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CDC cough fever when seek emergency care adult asthma symptoms diagnosis
The most probable diagnosis is bronchial asthma, likely with an acute exacerbation triggered by a respiratory infection.
A 5-year history of episodic cough is consistent with asthma, especially if episodes include wheeze, breathlessness, chest tightness, nocturnal cough, or improve with an inhaler. The new fever and 3-day cough may represent a concurrent viral respiratory infection or acute bronchitis. Pneumonia should be excluded if there is tachypnea, low oxygen saturation, focal chest signs, purulent sputum, or significant systemic illness.
Confirmation requires examination and, once stable, spirometry with bronchodilator reversibility testing.
Source: The Washington Manual of Medical Therapeutics, asthma section; it describes asthma as chronic airway inflammation with variable obstruction and episodic cough.
Source: The Washington Manual of Medical Therapeutics, asthma section; it describes asthma as chronic airway inflammation with variable obstruction and episodic cough.
Why is this not TB
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pulmonary tuberculosis diagnosis cough
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WHO tuberculosis symptoms cough fever weight loss night sweats diagnosis testing
It could still be TB. From the information given alone, TB cannot be ruled out.
Why asthma was initially more likely:
- A 5-year episodic pattern of cough fits asthma, which typically causes intermittent, variable symptoms, often with wheeze, breathlessness, chest tightness, nocturnal symptoms, or trigger-related attacks.
- Pulmonary TB more often causes a persistent and progressive cough with constitutional symptoms such as weight loss, night sweats, fatigue, low-grade fever, and sometimes hemoptysis. Tietz Textbook of Laboratory Medicine, 7th ed., Disease Presentation.
Why TB remains important here:
- The patient has cough and fever, which are TB screening symptoms.
- A person can have TB with an acute worsening on top of a long-standing cough.
- TB may be atypical, particularly in children, older adults, people with HIV, diabetes, malnutrition, or close TB exposure. WHO advises that cough, fever, night sweats, weight loss, hemoptysis, fatigue, or chest symptoms warrant diagnostic evaluation, but symptoms alone are not specific for TB. See the WHO TB symptom screening guidance.
Distinguishing tests
- Chest X-ray
- Sputum test for TB, preferably NAAT/Xpert MTB/RIF, plus smear microscopy/culture as indicated
- Pulse oximetry and chest examination
- Spirometry with bronchodilator testing, after acute infection settles, to confirm asthma
So: episodic cough favors asthma, but fever means infection must be assessed, and TB should be actively excluded if there is persistent cough, weight loss, night sweats, TB contact, hemoptysis, abnormal chest findings, or a high-TB-prevalence setting.
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