Plasmid Mediated Ampicillin Resistance in a Strain of Haemophilus pleuropneumoniae Isolated from Swine

  • Dwight C. Hirsh
  • Lori M. Assaf
  • Melissa C. Libal


Haemophilus pleuropneumonia is a hemolytic, nicotinamide adenine dinucleotide requiring member of the genus Haemophilus. H. pleuropneumoniae produces lobar pneumonia with fibrinous pleuritis in swine. The disease has high morbidity and, when introduced into highly susceptible animals, high mortality. When the microorganism becomes bacteremic, meningitis and arthritis may result. Young, rapidly growing pigs seem to be the most susceptible, though any age pig may contract the disease. The source of H. pleuropneumoniae in the environment is the respiratory tracts of affected as well as recovered asymptomatic pigs (1,2).


Nicotinamide Adenine Dinucleotide Neisseria Gonorrhoeae Brain Heart Infusion Broth Lobar Pneumonia Late Logarithmic Phase 
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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • Dwight C. Hirsh
    • 1
  • Lori M. Assaf
    • 1
  • Melissa C. Libal
    • 2
  1. 1.Deptartraent of Veterinary Microbiology School of Veterinary MedicineUniversity of CaliforniaDavisUSA
  2. 2.Animal Disease Research and Diagnostic LaboratorySouth Dakota State UniversityBrookingsUSA

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