# Haemophilus Influenzae Type B Disease > The content on this page is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment recommendations. If you have health concerns, consult a qualified healthcare professional. Medova is not a medical service provider. Source: https://medova.health/en/knowledge/diseases/hib-disease · Language: en ## Overview Severe invasive bacterial infections in young children including meningitis, epiglottitis, and pneumonia, preventable by Hib conjugate vaccine. ## Medical Information - ICD-10: A49.2 - ICD-11: 1C12.0 - Causative Agent: bacteria - Severity: Critical - Incubation Period: 2–4 days - Mortality Rate: 0.05% - Vaccine available: Yes ## Overview Hib disease refers to serious invasive bacterial infections caused by Haemophilus influenzae type b, primarily affecting young children under 5 years. It is effectively preventable with the Hib conjugate vaccine, which is part of routine childhood immunization schedules. ## Overview Before the introduction of vaccination, Hib was the leading cause of bacterial meningitis in children under 5 years of age. The bacterium spreads via respiratory droplets from person to person.\\n\\nInvasive Hib disease includes meningitis, epiglottitis (life-threatening airway swelling), pneumonia, septic arthritis, and cellulitis. Routine childhood vaccination has reduced the incidence of invasive Hib disease by over 99% in countries with high vaccine coverage. ## Emergency Signs - signs of meningitis: severe headache, stiff neck, bulging fontanelle in infants, seizures, altered consciousness\\n- signs of epiglottitis: drooling, inability to swallow, noisy breathing (stridor), tripod positioning, rapid deterioration\\n- signs of sepsis: high fever, rapid breathing, mottled skin, lethargy, poor feeding in infants ## Detailed Symptoms Symptoms depend on the site of infection.\\n\\n**Meningitis:** Fever, headache, stiff neck, sensitivity to light, altered consciousness. In infants: bulging fontanelle, irritability, poor feeding.\\n\\n**Epiglottitis:** Sudden high fever, severe sore throat, drooling, difficulty swallowing, noisy breathing (stridor), sitting in a forward-leaning position.\\n\\n**Pneumonia:** Fever, cough, rapid or difficult breathing.\\n\\n**Septic arthritis:** Joint pain, swelling, limited movement, fever. ## Course of Disease Rapid onset with an incubation period of 2–4 days. Meningitis progresses over hours to days. Epiglottitis can obstruct the airway within hours and is a medical emergency. Recovery typically takes 1–2 weeks with appropriate treatment, though meningitis recovery may be prolonged with potential for long-term complications. ## Diagnosis Diagnosis is based on clinical presentation and confirmed by blood cultures and cerebrospinal fluid analysis (for meningitis). Rapid detection tests and molecular testing (PCR) are available. Imaging may include chest X-ray for pneumonia or lateral neck X-ray if epiglottitis is suspected. Do not examine the throat directly in suspected epiglottitis — this can trigger complete airway obstruction. ## Treatment Invasive Hib disease requires hospital treatment with intravenous antibiotics (typically third-generation cephalosporins). For meningitis, anti-inflammatory medication may be given alongside antibiotics to reduce the risk of hearing loss. Epiglottitis requires urgent airway management. Supportive care includes fluids, monitoring, and management of complications. Always seek emergency medical care for suspected invasive Hib disease. ## Prevention Details - routine Hib conjugate vaccination is the most effective prevention (primary series at 2, 4, 6 months with booster at 12–15 months)\\n- antibiotic prophylaxis (rifampin) for close household contacts of invasive Hib cases\\n- maintaining high population vaccination coverage to sustain herd immunity\\n- good respiratory hygiene and hand washing ## Travel Advice - ensure childhood Hib vaccination is up to date before any travel\\n- risk may be higher in countries without routine Hib vaccination programs\\n- Hib vaccine is not a specific travel vaccine — it is part of the routine childhood immunization schedule\\n- adults with asplenia or immunodeficiency should verify their Hib vaccination status with a physician before travel ## How common is it? Historically a global threat to young children, invasive Hib disease is now rare in countries with routine Hib vaccination. It remains a significant cause of childhood meningitis and pneumonia in low-income countries without high vaccine coverage. Peak incidence occurs between 6 and 18 months of age. An estimated 200,000 cases of serious Hib disease occur annually in unvaccinated populations worldwide. ## Risk Factors - age under 5 years (especially 6–18 months)\\n- unvaccinated or incompletely vaccinated children\\n- absence of a functioning spleen (asplenia)\\n- immunodeficiency conditions\\n- crowded living conditions\\n- daycare attendance (increased exposure)\\n- sickle cell disease ## Complications Details Meningitis survivors may develop hearing loss (15–30%), intellectual disability, seizure disorders, or hydrocephalus. Epiglottitis can cause complete airway obstruction, which is rapidly fatal without intervention. Sepsis can lead to shock and multiorgan failure. Septic arthritis may result in joint damage. Long-term neurological sequelae are the most significant concern in meningitis survivors. ## Recovery & Outlook Hib meningitis has a 3–6% fatality rate with treatment and causes neurological complications in 15–30% of survivors. Epiglottitis has less than 1% mortality with proper airway management. Overall invasive Hib disease carries approximately 5% case fatality. Prognosis is excellent when promptly diagnosed and treated with appropriate antibiotics. ## Available Vaccines - [Haemophilus influenzae type b (Hib)](https://medova.health/en/knowledge/vaccines/haemophilus-influenzae-type-b-%28hib%29) ## Sources & content verification - Data sources: WHO Disease Factsheets 2024 + CDC Yellow Book 2024 + Heymann CDD 21st ed. - Generated by: AI - Review status: Awaiting medical review - Last updated: 2026-08-23 --- The content on this page is for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment recommendations. If you have health concerns, consult a qualified healthcare professional. Medova is not a medical service provider. [Full terms of use](https://medova.health/en/terms)