Symptoms:

• Cough that may produce mucus-like, greenish, or pus-like sputum
• Chills
• Shortness of breath
• Fever
• Easy fatigue
• Sharp or stabbing chest pain that gets worse with deep breathing or coughing
• Headache
• Loss of appetite
• Nausea and vomiting
• General discomfort, uneasiness, or ill feeling (malaise)
• Joint stiffness and joint pain (rare)
• Muscle stiffness (rare)
• Excessive sweating (rare)

Signs and tests:

A physical examination reveals respiratory distress and crackles or decreased breath sounds when listening to the chest with a stethoscope.

Tests performed may include:

• Chest x-ray or CT scan
• Sputum gram stain
• Sputum culture
• Blood cultures
• CBC (complete blood cell count)
• Arterial blood gases