Distribution of RTX toxin genes in strains of [Actinobacillus] rossii and [Pasteurella] mairii

Veterinary Microbiology
Désirée MayorP Kuhnert

Abstract

Strains of [Actinobacillus] rossii, [Pasteurella] mairii and [Pasteurella] aerogenes can be isolated from abortion in swine. The RTX toxin Pax has previously been found only in those [P.] aerogenes strains isolated from abortion. Nothing is known about RTX toxins in field isolates of the other two species. To gain insight into the distribution of selected RTX toxin genes and their association with abortion, PCR screening for the pax, apxII and apxIII operons on 21 [A.] rossii and seven [P.] mairii isolates was done. Since species can be phenotypically misidentified, the study was backed up by a phylogenetic analysis of all strains based on 16S rRNA, rpoB and infB genes. The pax gene was detected in all [P.] mairii but not in [A.] rossii strains. No apx genes were found in [P.] mairii but different gene combinations for apx were detected in [A.] rossii strains. Most of these strains were positive for apxIII, either alone or in combination with apxII. Whereas pax was found to be associated to strains from abortion no such indication could be found with apx in [A.] rossii strains. Phylogenetically [A.] rossii strains formed a heterogeneous cluster separated from Actinobacillus sensu stricto. [P.] mairii strains clustered with [P.]...Continue Reading

References

Jun 1, 2000·Veterinary Microbiology·A SchallerJ Frey
Oct 26, 2002·International Journal of Medical Microbiology : IJMM·Joachim Frey, Peter Kuhnert
May 15, 2004·International Journal of Systematic and Evolutionary Microbiology·Niels Nørskov-LauritsenBrita Bruun
Jul 29, 2004·International Journal of Systematic and Evolutionary Microbiology·Bozena KorczakPeter Kuhnert
Jan 18, 2005·International Journal of Systematic and Evolutionary Microbiology·Henrik ChristensenJohn Elmerdahl Olsen

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Citations

Feb 11, 2014·Antonie van Leeuwenhoek·Bożena M KorczakPeter Kuhnert
Feb 22, 2012·Journal of Microbiological Methods·Peter KuhnertJoachim Frey
Aug 4, 2009·International Journal of Systematic and Evolutionary Microbiology·Peter KuhnertJoachim Frey
Jan 14, 2012·Microbiology·M BisgaardH Christensen
Dec 16, 2017·Australian Veterinary Journal·P K Holyoake, A Thompson

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