[Some aspects of the study of atrophic rhinitis in pigs (author's transl)]

Atrophic rhinitis is the most dreaded nasal inflammatory lesion described in pigs. Experimental studies showed that this form of rhinitis may be induced by inoculation of the bacterial species Bordetella bronchiseptica (BB) and/or Pasteurella multocida (PM). It is apparent from studies on AR in the Central Veterinary Institute during the past few years, that these species of bacterium may be classified into AR-pathogenic and AR-non-pathogenic micro-organisms. The significance of these findings in the prevention and control the disease is discussed. Investigations on the differences in pathogenicity between the strains of BB and PM isolate showed that 152 out of 157 BB isolates were AR-pathogenic (97%). Of 776 PM isolates studied, 396 were found to be AR-pathogenic. Thirty-six isolates were classified as doubtful.