National Hog Farmer is part of the Informa Markets Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Detection of naturally aerosolized A. Pleuropneumoniae

TAGS: Buildings
Photo courtesy of Charles Maxwell U Arkansas hog barn interior.jpg
University of Arkansas Division of Agriculture research has shown that substituting feed-grade amino acids for crude protein in swine feed reduces both the costs and carbon footprint of swine production.
Work could potentially allow for the identification of sub-clinically infected populations of pigs in the field.

Respiratory infections caused by Actinobacillus pleuropneumoniae have a large impact on commercial pig farms globally. As current vaccines have limited efficacy, animal care and air hygiene are critical for disease control, say swine health experts.

Recent work by Anne Watt, Glenn Browning, Philip Markham and Marc Marenda, all of The University of Melbourne, used a Coriolis μ cyclonic air sampler and an A. pleuropneumoniae-specific apxIV gene qPCR assay to detect the organism. Air samples were collected into a liquid medium by the Coriolis μ sampler for A. pleuropneumoniae detection by plate culture and qPCR assay. The method was validated by comparing the Coriolis μ sampler and a plate impactor (Millipore Air-T) in a specially designed aerosolization chamber. Two commercial farms, housing pigs between 3 and 21 weeks of age, were tested. On one farm, A. pleuropneumoniae was detected in low numbers (1000 organisms/m3 air) by qPCR, but not by culture, from sheds containing 8, 12, 16, and 18 weeks-old pigs. The researchers said that to their knowledge this is the first successful detection of naturally aerosolized A. pleuropneumoniae in commercial farms with the Coriolis μ air sampler, potentially allowing the identification of sub-clinically infected populations of pigs in the field.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.