HAEMOPHILUS INFLUENZAE

MICROBIOLOGY

H. influenzae is a small, gram-negative, pleomorphic coccobacillus that grows both aerobically and anaerobically.

  • Six major serotypes (designated af) have been identified on the basis of antigenically distinct polysaccharide capsules.
  • Unencapsulated strains are referred to as nontypable (NTHi).

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