Hemophilus influenzae infection and their prevention by vaccination

: Encapsulated and non-encapsulated strains of haemophilus influenzae are known to exist. The encapsulated ones, especially those of type B (HiB), are highly invasive. Hib may cause, among other diseases, purulent meningitis, epiglottitis, septic arthritis/osteomyelitis and pneumonia. These diseases can be prevented by timely vaccination. The non-encapsulated haemophilus ionfluenzae strains often produce colonisation of the nasopharyngeal space and inflammation of the mucosa of the airways. They are often pathogens of otitis media, sinusitis, bronchitis and pneumonia. These diseases cannot be prevented by HiB vaccination.