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Clinical features and haematological indices of bacterial infections in young infants
Insights
Respiratory distress and cyanosis are key indicators of bacterial infections in infants under three months. C-reactive protein and erythrocyte sedimentation rate are the most reliable blood tests for diagnosing these infections.
Area of Science:
- Pediatrics
- Infectious Diseases
- Neonatology
Background:
- Bacterial infections pose a significant threat to young infants.
- Early and accurate diagnosis is crucial for effective treatment and improved outcomes.
- Clinical features and hematologic indices are commonly used to suspect bacterial infections in neonates and young infants.
Purpose of the Study:
- To analyze the clinical features and hematologic indices in young infants (≤3 months) with suspected bacterial infections.
- To identify specific clinical signs and laboratory markers that are significantly associated with bacterial infections in this age group.
Main Methods:
- Retrospective analysis of clinical data from 100 infants aged 3 months and below admitted with suspected bacterial infections.
- Evaluation of common clinical features such as fever, lethargy, and irritability.
- Assessment of hematologic indices including leukocyte counts, absolute neutrophil counts, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), and nitro-blue tetrazolium (NBT) tests.
Main Results:
- Fever, lethargy, hepatomegaly, poor feeding, and irritability were common presenting features.
- Respiratory distress and cyanosis were significantly associated with bacterial infections.
- C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) were significantly predictive of bacterial infections.
- Combinations of raised CRP with ESR, raised ESR with abnormal leukocyte counts, and raised CRP with abnormal leukocyte counts showed significant association with bacterial infections.
Conclusions:
- Respiratory distress and cyanosis are critical clinical indicators for suspecting bacterial infections in young infants.
- CRP and ESR are more reliable hematologic markers than leukocyte counts or NBT tests for diagnosing bacterial infections in this population.
- Combined use of CRP, ESR, and leukocyte counts can enhance the diagnostic accuracy for bacterial infections in infants.
Abstract:
The clinical features and haematologic indices of 100 young infants aged 3 months and below, admitted with suspected bacterial infections, were analysed. Fever, lethargy, hepatomegaly, poor feeding and irritability were the commonest features for suspecting a bacterial infection in these infants. However, the features significantly associated with bacterial infections were respiratory distress and cyanosis. Of the haematologic indices commonly associated with bacterial infections, only C-reactive protein and erythrocyte sedimentation rate were significantly predictive compared to leukocyte counts, absolute neutrophil counts and nitro-blue tetrazolium tests. When used in combination, a raised C-reactive protein with erythrocyte sedimentation rate, a raised erythrocyte sedimentation rate with abnormal leukocyte counts and a raised C-reactive protein with abnormal leukocyte counts were significantly associated with bacterial infections.