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[Chemoprophylaxis in indirectly related cases of Haemophilus influenzae meningitis]
1Staatliches Gesundheitsamt Tübingen.
Insights
Haemophilus influenzae type B (HIB) meningitis outbreaks in young children were linked to healthy siblings attending kindergarten. This suggests HIB circulates among children, necessitating chemoprophylaxis in close contacts.
Area of Science:
- Pediatrics
- Infectious Diseases
- Epidemiology
Background:
- Haemophilus influenzae type B (HIB) is a significant cause of bacterial meningitis in infants and young children.
- Early diagnosis and intervention are crucial for managing HIB meningitis.
Observation:
- Two separate incidents in South Germany revealed pairs of infants developing HIB meningitis within a week.
- Affected infants lacked direct contact but shared healthy older siblings attending the same kindergarten group.
- A similar pattern emerged five months later in a different community, involving two other infants.
Findings:
- The HIB strain likely circulated asymptomatically among healthy children in the kindergarten.
- Transmission occurred from these asymptomatic carriers to susceptible infants within the same social network.
- This indirect transmission pathway highlights the role of community settings in HIB spread.
Implications:
- The findings necessitate a re-evaluation of HIB transmission dynamics, particularly in childcare settings.
- Chemoprophylaxis with rifampicin was administered to all children, siblings, and staff in the affected kindergartens to prevent further cases.
- The study discusses challenges in implementing mass prophylaxis for HIB meningitis linked indirectly through community contacts.
Abstract:
In January 1991, in a community near the South German town of Tübingen, an infant and a toddler developed a Haemophilus influenzae type B (HIB) meningitis within a period of one week. The patients had no direct contact with each other, but each of them had a healthy sibling that was older. These siblings attended the same kindergarten and the same group. Five months later we noted the same situation in another community. Two infants fell ill with HIB meningitis at short intervals from each other, and again both patients had no common contacts, but they did have healthy siblings attending the same kindergarten and group. Hence, it must be assumed that the HIB strain circulated among the healthy kindergarten children and was transmitted by these to the patients. In order to prevent that after the two pairs of patients we had observed, further patients would follow among the kindergarten children or their younger siblings, chemoprophylaxis with rifampicin was initiated in all kindergarten children, their younger siblings and the adult Kindergarten staff. The problems arising from these unusual case constellations in respect of mass prophylaxis with rifampicin in cases of Haemophilus influenzae type B meningitis that are merely indirectly linked to each other, are discussed.