Related Experiment Video
Updated: May 17, 2026

Generation, Amplification, and Titration of Recombinant Respiratory Syncytial Viruses
Published on: April 4, 2019
Respiratory viruses from hospitalized children with severe pneumonia in the Philippines
Akira Suzuki1, Socorro Lupisan, Yuki Furuse
1Department of Virology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan. suzukia@med.tohoku.ac.jp
Insights
Viruses are frequently found in severe childhood pneumonia cases in the Philippines. Identifying these viral causes is crucial for developing effective strategies to decrease child pneumonia deaths in developing nations.
Area of Science:
- Pediatric infectious diseases
- Virology
- Public health in developing countries
Background:
- Pneumonia is a major cause of mortality in children globally, particularly in developing regions.
- The specific viral agents responsible for severe pediatric pneumonia are not well-understood, hindering targeted interventions.
Purpose of the Study:
- To investigate the prevalence and types of viral pathogens associated with severe pneumonia in children admitted to a tertiary hospital in the Philippines.
- To identify potential risk factors, including viral co-infections and specific viral types, associated with severe outcomes and mortality in pediatric pneumonia cases.
Main Methods:
- A prospective study enrolled 819 children (8 days to 13 years) with severe pneumonia from May 2008 to May 2009.
- Polymerase chain reaction (PCR) was used to detect respiratory viruses in nasopharyngeal swabs.
- Blood cultures were performed to identify bacterial co-infections.
Main Results:
- A virus was detected in 61.2% of the 819 patients; 423 cases had a single virus.
- Human rhinoviruses (189 cases) and respiratory syncytial virus (RSV) (165 cases) were the most common viruses.
- Influenza A virus positivity was significantly associated with a fatal outcome (OR=4.3). Bacterial pathogens were identified in 31 cases.
Conclusions:
- Viral etiologies are common in children with severe pneumonia in the Philippines.
- These findings underscore the importance of considering viral causes in pneumonia management and prevention strategies.
- Effective strategies to reduce childhood pneumonia deaths in developing countries must address viral pathogens.
Background:
Pneumonia remains a leading cause of child death in developing countries. The viruses in severe pneumonia remain poorly defined.
Methods:
The study was conducted at the Eastern Visayas Regional Medical Center in Tacloban City, Philippines from May 2008 to May 2009. Patients aged 8 days to 13 years old who were admitted to the Department of Pediatrics with severe pneumonia were enrolled for the study. Upon admission, polymerase chain reaction was performed using nasopharyngeal swabs and blood cultures to detect respiratory viruses and bacteria, respectively.
Result:
Among the 819 patients enrolled, at least one virus was detected in 501 cases (61.2%). In addition, 423 cases were positive for a single virus while bacteria were detected in the blood culture sample of 31 cases. The most commonly detected viruses were human rhinoviruses (n = 189), including types A (n = 103), B (n = 17), and C (n = 69), and respiratory syncytial virus (RSV) (n = 165). Novel viruses such as human metapneumovirus, human coronavirus NL63, human bocavirus, and human polyomaviruses WU and KI were also detected. There were 70 deaths, and one or more viruses were detected in 35 (50%) of these cases. Positivity only for influenza A virus (OR = 4.3, 95% CI = 1.3-14.6) was significantly associated with fatal outcome. From the blood culture, Burkholderia cepacia group (n = 9), Streptococcus pneumoniae (n = 4), Staphylococcus aureus (n = 4), Haemophilus influenzae (n = 1), and Salmonella C1 (n = 1) were also isolated.
Conclusion:
Viruses were commonly detected in children with severe pneumonia in the Philippines. Hence, viral etiologies should be considered while developing better effective strategies to reduce child pneumonia-related deaths in developing countries.
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 IV: Management
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:
Pneumonia II: Pathophysiology
Influenza
Pneumonia III: Complications and Assessment
