Related Experiment Video
Updated: Aug 8, 2026

Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria
Published on: February 23, 2014
Etiology of community-acquired pneumonia in hospitalized patients in Jordan
Musa K Al-Ali1, Raymond G Batchoun, Tarig M Al-Nour
1Department of Medicine, Faculty of Medicine, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan. musaali@just.edu.jo
Insights
Community acquired pneumonia (CAP) in Jordan is often caused by Streptococcus pneumoniae and atypical organisms in adults, and atypical organisms in children. Gram-negative bacteria are more common in adults with co-morbidities.
Area of Science:
- Infectious Diseases
- Microbiology
- Pulmonology
Background:
- Community-acquired pneumonia (CAP) is a significant global health concern.
- Identifying causative pathogens is crucial for effective treatment and public health strategies.
Purpose of the Study:
- To determine the specific etiological agents responsible for CAP in hospitalized Jordanian patients.
- To differentiate causative organisms between adult and pediatric CAP cases.
Main Methods:
- A prospective study was conducted over six months in two teaching hospitals in Irbid, Jordan.
- Patients diagnosed with CAP, including both adults and children, were enrolled.
- Sputum cultures were utilized for pathogen identification.
Main Results:
- Pathogens were identified in 71% of adult CAP cases and 27% of pediatric cases.
- In adults, Streptococcus pneumoniae was the most frequent isolate, followed by Chlamydia pneumoniae and Haemophilus influenzae.
- In children, Chlamydia pneumoniae was most common, followed by Mycoplasma pneumoniae and Streptococcus pneumoniae.
Conclusions:
- Streptococcus pneumoniae and atypical pathogens are primary causes of CAP in healthy Jordanian adults.
- Gram-negative organisms are more prevalent in adult CAP patients with co-morbidities.
- The detection rate of causative agents in pediatric CAP was low, with atypical microorganisms predominating.
Objective:
To ascertain the causative organisms of community acquired pneumonia (CAP) in Jordanian patients requiring hospital admission.
Methods:
A prospective study of both adults and children admitted to Princess Basma and Princess Rahma Teaching Hospitals in Irbid, Jordan with a diagnosis of CAP over a 6-month period from April to October 2002.
Results:
A total of 35 adult patients were admitted with a mean age of 47 years, and 63 children with a mean age of 3 years. A pathogen was isolated from 25 (71%) adults, and from 17 (27%) children, and sputum cultures gave the best diagnostic yield. In adults Streptococcus pneumoniae was the most common isolate (26%), followed by Chlamydia pneumoniae (23%), Haemophilus influenzae (17%), Mycoplasma pneumoniae (9%), and Legionella pneumophila and Klebsiella pneumoniae (6%) each. Seven of the 9 gram negative isolates were from patients with some co morbid illness. While in children, Chlamydia pneumoniae was the most common (14%), followed by Mycoplasma pneumoniae (6%), and Streptococcus pneumoniae, Haemophilus influenzae, and Pseudomonas aeruginosa (3%) each.
Conclusion:
Streptococcus pneumoniae and atypical microorganisms are the most common cause of CAP in previously healthy adults; while in those with associated co morbid illness, gram negative organisms are the likely cause. In children, the overall detection rate of causative organisms was low with atypical microorganisms being the most common.
Related Concept Videos
Pneumonia I: Introduction
Pneumonia I: Introduction
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia II: Pathophysiology
Pneumonia III: Complications and Assessment
Pneumonia V: Nursing management and Prevention
The nurse must practice strict medical asepsis and adhere to infection control guidelines to minimize healthcare-associated infections.
Enhance airway patency
Position the patient correctly to facilitate drainage of the affected lung segments. Manual or mechanical percussion and vibration can also be employed.
Atypical Pneumonia
