Following the decline in invasive Hib disease, the HPA extended its enhanced surveillance to include all cases of invasive Haemophilus influenzae infections across all age groups in England and Wales since 01 January 2009. Clinicians, microbiologists and public health doctors are encouraged to report all cases of invasive H. influenzae infections to HPA Haemophilus Reference Unit (HRU) and refer the isolate for confirmation and serotyping if this has not already been done. The HPA also identifies cases reported through the NHS hospital microbiology electronic laboratory reporting system, LabBase2.
A case of H. influenzae infection is considered to be invasive if the organism was isolated from a normally sterile site, such as blood culture, cerebrospinal fluid (CSF), joint fluid, pleural fluid, etc. For all invasive H. influenzae cases, an age- and gender-appropriate questionnaire requesting information on clinical presentation, risk factors, complications and outcome is sent to the patient’s general practitioner (GP) but can be completed by any clinician.
Copies of the questionnaires are available below:Questionnaire for invasive Haemophilus influenzae type b (PDF, 130 KB)