Haemphilus influenzae is a pleomorphic gram-negative coccobacillus and is isolated in 2 major forms: unencapsulated and encapsulated. Unencapsulated strains are termed nontypable and are rare causes of serious infection but are a common cause of ear infections in children and bronchitis in adults; they are a rare cause of chorioamnionitis and neonatal sepsis. Only type B (“Hib”) is vaccine-preventable; all invasive disease isolates are serotyped at the state public health laboratory.
The most common types of invasive disease are meningitis, epiglottitis, pneumonia, arthritis, and cellulitis.
Public
- Haemophilus influenzae Disease | H. influenzae | CDC
- Hib Vaccination | H. influenzae | CDC
- About Haemophilus influenzae Disease | H. influenzae | CDC
Healthcare Providers
- Clinical Overview of Haemophilus influenzae Disease | H. influenzae | CDC
- Report a case of this disease by fax
- Submit a specimen for laboratory testing
- Learn more information about disease reporting
Laboratories
- CDC’s Bacterial Meningitis Laboratory | H. influenzae | CDC
- Report a case of this disease by fax
- Submit a specimen for laboratory testing
