Complex events lead to pneumonia in pigs

Porcine Respiratory Disease Complex (PRDC), recognized by various respiratory signs and often resulting in reduced feed efficiency and poor growth, remains a major economic concern in pig farms around the world.

The term PRDC refers to the complex mixture of the following elements that result in pneumonia in pigs:

  • Pathogens
  • Environmental
  • Housing
  • Nutritional factors
  • Management factors
  • Host immune system weakness
  • Genetics

Pathogens commonly involved in PRDC:

  • Porcine Reproductive and Respiratory Syndrome virus (PRRSv)
  • Swine Influenza Virus (SIV)
  • Porcine circovirus type 2 (PCV2), which causes Porcine Circovirus Diseases (PCVD)
  • Mycoplasma hyopneumoniae (M. hyo), which causes Enzootic Pneumonia
  • Haemophilus parasuis, which causes Glässers Disease
  • Actinobacillus pleuropneumoniae, which causes Porcine pleuropneumonia
  • Streptococcus suis

PRDC is seldom the result of one pathogen, and pathogens involved vary between countries, regions and farms.

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