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Streptococcal abscesses following diphtheria-tetanus toxoid-pertussis vaccination
Insights
A cluster of seven pediatric abscesses was linked to a single multidose vial of diphtheria-tetanus toxoid-pertussis vaccine. Group A Streptococcus was identified, suggesting contamination during vaccine administration.
Area of Science:
- Pediatric infectious diseases
- Vaccine safety and adverse events
- Epidemiology of bacterial infections
Background:
- Vaccinations are crucial for preventing infectious diseases in children.
- Adverse events following immunization require thorough investigation to ensure public health.
- Diphtheria-tetanus toxoid-pertussis (DTaP) vaccine is a standard childhood immunization.
Purpose of the Study:
- To investigate a cluster of abscesses in children following DTaP vaccination.
- To identify the potential source and causative agent of the observed abscesses.
- To assess the safety of the specific DTaP vaccine lot used.
Main Methods:
- Epidemiologic investigation of affected children.
- Clinical examination and microbiological analysis of abscesses.
- Review of vaccination records and vaccine handling procedures.
Main Results:
- Seven children developed abscesses after receiving DTaP vaccine from a single multidose vial.
- Group A beta-hemolytic Streptococcus was isolated from six of the seven abscesses.
- No other cases were linked to the same vaccine lot used elsewhere, indicating localized contamination.
Conclusions:
- The cluster of abscesses was likely caused by contamination of the multidose vaccine vial during use.
- Strict adherence to aseptic techniques during vaccination is critical to prevent such adverse events.
- Further investigation into vaccine handling protocols may be warranted.
Abstract:
Abscesses developed in seven children who received diphtheria-tetanus toxoid-pertussis vaccine at a clinic in Indiana. Epidemiologic investigation revealed that all seven children had received vaccine from the same multidose vial and had been vaccinated by the same nurse at the office of one physician. Group A beta-hemolytic Streptococcus was isolated from abscesses in six of the seven children. No source was identified as the cause of this cluster of abscesses. Vaccine of the same lot number used elsewhere was not associated with the development of abscesses. It appears that the vaccine became contaminated during use.