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The prevention of pig-bel in Papua New Guinea
Insights
Clostridium welchii type C beta toxoid vaccination significantly reduces pig-bel incidence in Highlands children. This crucial intervention, administered in infancy, offers protection against a leading cause of child mortality.
Area of Science:
- Medical Microbiology
- Pediatric Infectious Diseases
- Vaccinology
Background:
- Pig-bel, caused by Clostridium welchii type C, is a primary cause of mortality in children over 12 months in the Highlands.
- Existing health services require enhancement for effective vaccine delivery in the region.
Purpose of the Study:
- To evaluate the efficacy of Clostridium welchii type C beta toxoid in preventing pig-bel in Highlands children.
- To provide evidence-based recommendations for infant vaccination schedules.
Main Methods:
- A double-blind, controlled trial was conducted in Sina Sina.
- Participants received either Clostridium welchii type C beta toxoid (beta toxoid) or tetanus toxoid as a placebo.
- Incidence of pig-bel was monitored over a two-year period.
Main Results:
- A significantly lower incidence of pig-bel was observed in the beta toxoid group (2 cases) compared to the control group (17 cases) (p < 0.02).
- The study involved 2,538 children receiving beta toxoid and 2,532 receiving tetanus toxoid.
Conclusions:
- Clostridium welchii type C beta toxoid is an effective prophylactic agent against pig-bel.
- Recommended infant vaccination schedule: beta toxoid at two, four, and six months of age, with potential need for boosters.
- Improvement of health services is critical for successful vaccine implementation in the Highlands.
Abstract:
In many Highlands hospitals pig-bel is the commonest cause of death in children over 12 months of age. In a double blind controlled trial in Sina Sina we have shown that Clostridium welchii type C beta toxoid (beta toxoid) protects against pig-bel (p < 0.02). Of 2,538 children given beta toxoid, two developed pig-bel in the following two years. Seventeen of 2,532 control children vaccinated with tetanus toxoid developed pig-bel. We suggest that beta toxoid be given to Highlands children at two, four and six months of age. Boosters may be needed. Health services in the Highlands need to be improved so that this vaccine can be effectively delivered.