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Published on: February 23, 2014
Community-acquired Pneumonia in Bangladeshi Children Under Five: Pathogen Prevalence, Resistance Trends, and
Sanchita Kar1,2, Sharmin Aktar Mukta1, Zannat Kawser1
1Acute Respiratory Infections Research and Interventions, Mérieux Foundation, France.
Insights
Childhood pneumonia in Bangladesh shows high rates of antibiotic resistance and a prevalence of non-vaccine serotypes. These findings emphasize the need for updated pneumococcal surveillance and antimicrobial resistance strategies.
Area of Science:
- Pediatrics
- Infectious Diseases
- Public Health
Background:
- Community-acquired pneumonia (CAP) is a major cause of mortality in children globally.
- Diverse etiologies contribute to CAP, necessitating region-specific data for effective interventions.
- Understanding local epidemiology is crucial for optimizing treatment and vaccination strategies.
Purpose of the Study:
- To investigate the epidemiological characteristics of childhood CAP in Dhaka, Bangladesh.
- To identify common pathogens and assess antimicrobial resistance patterns.
- To inform public health strategies for CAP prevention and management.
Main Methods:
- A case-control study involving 226 children under 5 with CAP and 201 controls was conducted in Dhaka.
- Pathogen detection utilized blood and nasopharyngeal swabs.
- Antibiotic susceptibility testing, pneumococcal serotyping, and inflammatory marker analysis (C-reactive protein, procalcitonin) were performed.
Main Results:
- No bacteremic CAP cases were found. Streptococcus pneumoniae, RSV, SARS-CoV-2, and influenza A/B were significantly associated with CAP.
- Over 90% of pneumococcal isolates were non-PCV10 serotypes, with serotype 19A predominant.
- High rates of multidrug resistance were observed in S. pneumoniae and Staphylococcus aureus (including MRSA).
Conclusions:
- Childhood CAP in Dhaka is characterized by high antimicrobial resistance and a predominance of non-PCV10 pneumococcal serotypes.
- Findings highlight the urgent need for enhanced pneumococcal surveillance to guide vaccine policy.
- Strengthened approaches to combat antimicrobial resistance are critical for improving child health outcomes.
Background:
Community-acquired pneumonia (CAP) is a leading cause of childhood mortality, with diverse etiologies. This study aimed to generate region-specific data to inform treatment and vaccination strategies for childhood CAP.
Methods:
We enrolled 226 CAP cases and 201 controls (<5 years) at Dhaka Medical College & Hospital (March 2022-April 2023) in Dhaka, Bangladesh. Blood and nasopharyngeal swabs were collected for pathogen detection. Bacterial isolates were tested for antibiotic susceptibility, pneumococcal isolates were serotyped, and inflammatory markers (C-reactive protein, procalcitonin) were measured.
Results:
No bacteremic cases of CAP were identified. Streptococcus pneumoniae [odds ratio (OR) = 2.26, 95% confidence interval (CI): 1.5-3.4], respiratory syncytial virus (OR = 6.16, 95% CI: 2.54-14.9), SARS-CoV-2, and influenza A/B were significantly associated with CAP, with SARS-CoV-2 and influenza A/B detected only in cases. Co-identification of pathogenic bacteria and viruses occurred in 14% (33/226) of cases. Over 90% of pneumococcal isolates were non-pneumococcal conjugate vaccine-10 serotypes, and serotype 19A was predominant (19%, 19/101 in cases and 6%, 3/53 in controls). Multidrug resistance was frequent in S. pneumoniae (40%, 71/178) and Haemophilus influenzae (38%, 20/52); 86% of pneumococci were macrolide nonsusceptible. Among Staphylococcus aureus , 76% (31/41) were methicillin-resistant. C-reactive protein and procalcitonin were elevated in severe CAP cases; however, no definitive cutoff threshold distinguished bacterial from viral causes.
Conclusions:
Our findings highlight the current epidemiology of childhood CAP in Dhaka, Bangladesh, identifying high antimicrobial resistance and predominance of non-pneumococcal conjugate vaccine-10 serotypes. These results underscore the need for continued pneumococcal surveillance to guide vaccine and treatment strategies and strengthened approaches for addressing antimicrobial resistance.
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