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Pulmonary changes in neonatal sepsis to group B beta-hemolytic Streptococcus: relation of hyaline membrane disease
Insights
Group B streptococcal sepsis in infants can mimic hyaline membrane disease. This infection causes radiographic changes and lung membranes similar to hyaline membrane disease, suggesting a potential cause.
Area of Science:
- Neonatal Medicine
- Infectious Diseases
- Pediatric Pathology
Background:
- Hyaline membrane disease (HMD), also known as respiratory distress syndrome, is a common neonatal respiratory disorder.
- Group B Streptococcus (GBS) is a leading cause of sepsis and meningitis in newborns.
Purpose of the Study:
- To investigate the association between group B beta-hemolytic streptococcal sepsis and radiographic findings suggestive of hyaline membrane disease in infants.
- To examine lung pathology in infants with GBS sepsis for the presence of streptococci within hyaline membranes.
Main Methods:
- Retrospective review of radiographic findings in infants diagnosed with GBS sepsis.
- Post-mortem examination of lung tissue from infants with GBS sepsis, including special stains for bacterial identification within membranes.
Main Results:
- Seven of eight infants with GBS sepsis exhibited radiographic changes consistent with HMD.
- Hyaline membranes were present in all six infants examined post-mortem.
- Group B Streptococcus was identified within the hyaline membranes of five infants, in one case comprising the bulk of the membrane.
Conclusions:
- Group B streptococcal infection can present with clinical and radiographic features indistinguishable from hyaline membrane disease.
- The presence of GBS within lung hyaline membranes suggests a direct role of the bacteria in the pathogenesis of this syndrome.
- This finding highlights the importance of considering neonatal sepsis in the differential diagnosis of respiratory distress in newborns.
Abstract:
The radiographic changes of hyaline membrane disease were seen in seven of eight infants with group B beta-hemolytic streptococcal sepsis. Hyaline membranes were found throughout the lungs of all six infants who were examined after death. The most striking finding was the presence of group B streptococci within the membranes of five infants. Streptococci were so numerous in one instance that they comprised the bulk of the membrane. Another infant uas thought to have classical hyaline membrane disease until numerous group B streptococci were found within the membranes when lung sections were examined with special stains. No other organisms were identified within the membranes of any infant. These findings suggest that infection with group B streptococcus may cause a syndrome clinically and radiologically indistinguishable from hyaline membrane disease.