What are the signs and symptoms of meningitis in patients with Haemophilus influenzae infections?

Updated: Jun 11, 2021
  • Author: Joseph Adrian L Buensalido, MD; Chief Editor: Pranatharthi Haran Chandrasekar, MBBS, MD  more...
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Meningitis is the most serious manifestation of H influenzae type b (Hib) infection. Symptoms of antecedent URTI are common. Altered mental status and fever are the most common presenting features. Headache and photophobia are usually present in older children.

Symptoms related to other infectious foci (eg, cellulitis, arthritis, pneumonia) are encountered in 10-20% of children. Infants have nonspecific symptoms, including irritability, fever, lethargy, poor feeding, and vomiting.

H influenzae accounts for 5-10% cases of adult meningitis, and patients can present with at least one of the classic triad of fever, neck stiffness, and altered mental status.

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