The goal of this observational study is to learn about causes of unresolved pneumonia in children who take appropriate antimicrobial therapy.

Recurrent pneumonia is defined as two episodes of pneumonia in 1 year or three episodes over any time frame. Non resolving pneumonias are characterized by the persistence of symptoms and roentgenographic abnormalities for more than 1 month. The key step in evaluating the patient referred for recurrent or persistent pneumonia is to review the clinical and radiographic features of the episodes to determine if there is adequate documentation to proceed with treatment. After deciding that a patient has had a persistent episode of pneumonia or the requisite number of recurrent episodes of pneumonia (accompanied by radiographic evidence of pulmonary infiltrates), it is essential to classify the episodes into those involving single or multiple lobes. On the basis of this classification.

Inclusion Criteria:

• Patients with incomplete resolution by 4 weeks despite appropriate antimicrobial therapy.

  • From the age of one month to the age of 6 years old.

Exclusion Criteria:

• *Age of the patient below one month and above 6 years old.

  • Patients with chronic lung diseases.
  • Patients with immunodeficiency.
  • Patient with aspiration pneumonia.

Children included in the definition of unresolving pneumonia