Difference between revisions of "Category:Haemophilus species"

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===''Haemophilus pleuropneumonia''===
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===''[[Haemophilus pleuropneumonia]]''===
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*''H. pleuropneumonia'' in [[Respiratory Bacterial Infections - Pathology#Contagious porcine pleuropneumonia|Contagious porcine pleuropneumonia]]
 
  
 
===''Haemophilus paragalinarum''===
 
===''Haemophilus paragalinarum''===

Revision as of 09:59, 14 May 2010


Overview

  • Inhabit mucosal epithelium of upper respiratory and lower genital tract
  • Suppurative infections due to release of pro-inflammatory cytokines released from macrophages
  • Serofibrinous to fibrinopurative infections of lungs, body cavities and joints
  • Colonisation of meningeal vessels causes a thrombotic vasculitis leading to encephalitis and meningitis


Haemophilus characteristics

  • Morphologically variable Gram-negative bacilli, ranging from short rods to long filaments
  • Facultative anaerobes
  • Typically oxidase positive
  • Depend on beta-nicotinamide adenine dinucleotide (NAD) (V factor) and/or Haemin (X fector) for growth
  • Heated blood agar (Chocolate Agar) required for growth of NAD-dependent strains
  • Haemin-dependent strains grow on Blood Agar
  • Do not grow on MacConkey agar


Haemophilus parasuis

Haemophilus somnus

Haemophilus pleuropneumonia

Haemophilus paragalinarum

  • Infectious coryza of poultry - accute upper-respiratory tract infection
  • Nasal discharge, swollen sinuses, facial oedema and conjunctivitis
  • Resistant to complement-mediated lysis and phagocytosis


Haemophilus haemoglobinophilus

  • Commensal of canine lower genital tract
  • Causes cystitis and neonatal infections


Haemophilus felis

  • Associated with feline conjunctivitis


Haemophilus influenzae

  • Human meningitis, septicaemia, bronchopneumonia, conjunctivitis, epiglottitis, and otitis