Haemophilus influenzae Poster 00

1
Haemophilus influenzaePoster 00

• Small gram-negative bacilli
• Causes meningitis, epiglottitis in children lt 4
• does NOT cause the flu
• VF capsule (inhibits phagocytosis)
• Capsule type b (Hib) most common in U.S.
• XMT respiratory route or direct contact
  (humans)
• Treatment antibiotics
• Prevented in U.S. by Hib vaccine (capsule
  antigens)

2
Haemophilus influenzaePoster 00

• SS epiglottitis cherry-red, swollen epiglottis
  blocked airway
• Lab Dx gram stain, culture on chocolate agar
  (wont grow on BAP), test for growth factor
  requirements (factors X and V)
• Specimens csf for meningitis, blood for
  epiglottitis (swabbing pharynx can ? spasms that
  block air flow)
• Growth on chocolate agar, satellite growth on BAP
• Haemophilus ID quad plates test for X V req.

3
Haemophilus influenzaePoster 00

• epiglottitis
• 
  chocolate agar
• satellite
  growth
• 
  quad plate