An outbreak of Haemophilus influenzae type b bacteraemia in an intermediate care hospital for children

Area of Science:

• Pediatric Infectious Diseases
• Hospital Epidemiology
• Bacterial Pathogenesis

Background:

• Haemophilus influenzae type b (Hib) can cause severe invasive disease, particularly in young children.
• Hospital outbreaks of Hib bacteraemia pose a significant risk, especially in vulnerable pediatric populations with chronic illnesses.
• Effective control measures are crucial to prevent transmission within healthcare settings.

Purpose of the Study:

• To describe an outbreak of Haemophilus influenzae type b bacteraemia in a pediatric intermediate care hospital.
• To evaluate the effectiveness of rifampicin prophylaxis and infection control measures in halting the outbreak.
• To discuss the role of rifampicin prophylaxis for hospital contacts of invasive Hib infections.

Main Methods:

• Retrospective case identification and contact tracing within the infant unit.
• Implementation of rifampicin prophylaxis for all patients and relevant staff.
• Application of general infection control measures.

Main Results:

• A high attack rate of 36% (4 of 11 patients) was observed during the outbreak.
• The combined intervention of rifampicin prophylaxis and enhanced infection control measures led to the rapid cessation of the outbreak.
• No further cases of Hib bacteraemia occurred after the intervention.

Conclusions:

• Rifampicin prophylaxis is an effective strategy for controlling Haemophilus influenzae type b outbreaks in hospital settings.
• Prompt implementation of targeted prophylaxis and infection control is essential for managing pediatric bacterial outbreaks.
• Further consideration of rifampicin prophylaxis for hospital contacts of invasive Hib cases is warranted.