Abstract

Effects of a bacterial infection on the IFN-alpha production in vivo and in vitro were studied in eight specific pathogen free pigs experimentally infected with Actinobacillus pleuropneumoniae. Clinically, the experimental infection was manifested as a febrile stage which lasted approximately one week and by signs of respiratory disease. The Aujeszky's disease virus (ADV) induced IFN-alpha production, assessed in whole blood cultures, was increased for the infected pigs during the febrile stage, Potentiating effects on the IFN-alpha production could be transferred to cultures of purified peripheral blood mononuclear cells with sera collected from the infected pigs during this period of time. Although the experimental infection with A. pleuropneumoniae did not induce any detectable amounts of IFN-alpha in serum or nasal secretion, both a phenol-extract and a heat-inactivated preparation of the bacteria induced low levels of IFN-alpha in cultures of purified PBMC, The interferogenic structures of the bacteria were not identified but there were indications that the bacteria induced IFN-alpha production in the same cell type as ADV. (C) 1998 Elsevier Science Ltd. All rights reserved.

Keywords

A-pleuropneumoniae; IFN-alpha; in vitro functional tests; porcine

Published in

Comparative Immunology, Microbiology and Infectious Diseases
1998, Volume: 21, number: 2, pages: 135-154
Publisher: PERGAMON-ELSEVIER SCIENCE LTD

SLU Authors

• Wattrang, Eva

  • Department of Veterinary Microbiology, Swedish University of Agricultural Sciences
    

• Fossum, Caroline

  • Department of Veterinary Microbiology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Microbiology


Publication identifier

DOI: https://doi.org/10.1016/S0147-9571(97)00025-8

Permanent link to this page (URI)

https://res.slu.se/id/publ/106566