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Updated: Oct 11, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Invasive bacterial infections of children in a rural province in the central Philippines
S P Lupisan1, E Herva, L T Sombrero
1Research Institute for Tropical Medicine, Department of Health, Alabang, Metro Manila, The Philippines.
Insights
Invasive bacterial infections in Filipino children under five were primarily caused by Streptococcus pneumoniae and Haemophilus influenzae. Early childhood immunization against these pathogens is crucial for prevention.
Area of Science:
- Pediatrics
- Infectious Diseases
- Microbiology
Background:
- Severe pneumonia, meningitis, and sepsis are significant threats to children under five.
- Understanding the causative agents of invasive bacterial infections is vital for effective treatment and prevention strategies.
Purpose of the Study:
- To identify the primary bacterial pathogens responsible for invasive infections in Filipino children under five.
- To determine the serotypes of Streptococcus pneumoniae and the types of Haemophilus influenzae causing these infections.
- To inform immunization strategies for preventing invasive bacterial infections in young children.
Main Methods:
- A study was conducted on 956 Filipino children under five years old with severe pneumonia, suspected meningitis, or sepsis.
- Bacterial isolates from blood and cerebrospinal fluid were identified and serotyped/typed.
Main Results:
- Streptococcus pneumoniae and Haemophilus influenzae were the most common causes of invasive infections (1.3% each).
- Haemophilus influenzae type b was predominant in blood and cerebrospinal fluid isolates.
- Most invasive infections occurred in children under one year of age.
Conclusions:
- Early childhood immunization against Haemophilus influenzae type b and Streptococcus pneumoniae is recommended.
- Maternal immunization may enhance protection against invasive bacterial infections in infants.
- Targeting early age groups for vaccination is essential to reduce the burden of these diseases.
Abstract:
The etiology of invasive bacterial infections was studied among 956 Filipino children less than five years old who fulfilled the World Health Organization criteria for severe or very severe pneumonia or had suspected meningitis or sepsis. The most common invasive infections were due to Streptococcus pneumoniae (12 [1.3%]) and Haemophilus influenzae (12 [1.3%]); including four cases of pneumococcal meningitis and 11 cases of H. influenzae meningitis. Type 1 was the most common (six of the 12 isolates) of the pneumococcal serotypes. Serotypes/groups 1, 6, 14, and 23 accounted for 91.7% of the invasive isolates. The majority of the H. influenzae strains from blood (10 out of 10) and cerebrospinal fluid (6 out of 7) were type b. Almost all of the invasive S. pneumoniae (9 out of 12) and H. influenzae (11 out of 12) infections were seen before one year of age, which stresses the need to investigate early immunization of children for H. influenzae type b and S. pneumoniae, as well as maternal immunization to maximize the potential of immunoprophylaxis.
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