Haemophilus influenzae type b

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Related to Haemophilus influenzae type b: Haemophilus influenzae type B vaccine

Haemophilus influenzae type b

the most virulent serotype (there are six, categorized a-f, based on antigenic typing of the polysaccharide capsule); species responsible for meningitis and respiratory infections in young children.

Haemophilus influenzae type b

(hē-mŏf′ə-ləs ĭn′flo͞o-ĕn′zē′)
n. Abbr. Hib
A rod-shaped, gram-negative bacterium found in the human respiratory tract that causes acute respiratory infections, such as pneumonia, and other diseases, especially meningitis in young children.

Hae·moph·i·lus in·flu·en·zae type B

(hē-mof'i-lŭs in-flū-en'zē tīp)
The most virulent serotype (there are six, A-F, based on antigenic typing of the polysaccharide capsule); bacterial species responsible for meningitis and respiratory infections in young children.

Haemophilus influenzae type b

Abbreviation: HIB
A species that is an important, vaccine-preventable cause of meningitis. In children, this organism also causes acute epiglottitis, pneumonia, septic arthritis, and cellulitis.


A cephalosporin that penetrates into the cerebrospinal fluid, such as cefotaxime or ceftriaxone, should be used.


Administer the HIB vaccine three or four doses beginning at 2 months of age. Because the various forms of HIB vaccine are administered on different schedules, it is important to check the package insert for the appropriate information. Booster doses may be required.

See also: Haemophilus
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