Skip to main content
  • Published:

Mycoplasma Dispar As a Causative Agent in Pneumonia of Calves

Mycoplasma dispar som årsag til pneumoni hos kalve.

Abstract

Three field strains of Mycoplasma dispar were inoculated, by aerosol inhalation, into a total of eight naturally-born, colostrum-deprived calves. All three strains produced macroscopic pneumonia, each in one calf. Histopaithologically an exudative bronchitis accompanied by moderate interstitial cell proliferations was found.

Reisolation studies indicated that the entire respiratory tract is the natural habitat of Mycoplasma dispar, which apparently does not spread via the blood stream.

Sammendrag

Tre nyisolerede stammer af Mycoplasma dispar blev brugt til podningsforsøg på ialt 8 kalve, som straks efter fødselen blev isoleret og opdrsettet uden brug af kolostrum. Podningen blev foretaget ved inhalatíon af mykoplasmer i aerosol.

Ved obduktionen fandtes for hver af de 3 stammers vedkommende 1 kalv med makroskopiske tegn på pneumoni. De histopatologiske forandringer var domineret af en eksudativ bronkitis ledsaget af modérate interstitielle celleproliferationer.

For alle 8 kalves vedkommende viste hyppigheden med hvilken reisolationsforsøgene lykkedes, at såvel øvre som nedre luftveje må anses for det naturlige habitat for Mycoplasma dispar, samt at denne rnykoplasmaart ikke synes at spredes i organismen via blodbanerns.

References

  • Bitsch, V., N. F. Friis & H. V. Krogh: A microbiological study of pneumonie calf lungs. Acta vet. scand. 1976, 17, 32–42.

    CAS  PubMed  Google Scholar 

  • Friis, N. F.: Mycoplasma suipneumoniae and Mycoplasma flocculare in comparative pathogenicity studies. Acta vet. scand. 1974, 15, 507–518.

    Article  CAS  Google Scholar 

  • Friis, N. F.: Heterogeneity of Mycoplasma dispar. Acta vet. scand. 1978, 19, 407–412.

    CAS  PubMed  Google Scholar 

  • Friis, N. F. & K. B. Pedersen: Isolation of Mycoplasma bovoculi from cases of infectious bovine keratoconjunctivitis. Acta vet. scand. 1979, 20, 51–59.

    Article  CAS  Google Scholar 

  • Gourlay, R. N. & R. H. Leach: A new mycoplasma species isolated from pneumonic lungs of calves (Mycoplasma dispar sp. nov.). J. med. Microbiol. 1970, 3, 111–123.

    Article  CAS  Google Scholar 

  • Gourlay, R. N., A. Mackenzie & J. E. Cooper: Studies of the microbiology and pathology of pneumonic lungs of calves. J. comp. Path. 1970, 80, 575–584.

    Article  CAS  Google Scholar 

  • Howard, C. J., R. N. Gourlay, L. H. Thomas & E. J. Stott: Induction of pneumonia in gnotobiotic calves following inoculation of Mycoplasma dispar and Ureaplasmas (T-mycoplasmas). Res. vet. Sci. 1976, 21, 227–231.

    Article  CAS  Google Scholar 

  • Kuniyasu, C., Y. Yoshida, H. Ueda, H. Sugawara & Y. Ito: Isolation of Mycoplasma dispar from pneumonic calf lungs in Japan. Nat. Inst. Anim. Hlth Quart. 1977, 11, 75–76.

    Google Scholar 

  • Mandrup, M., N. F. Friis, A. Meyling & J. H. Meding: Studies on the possible occurrence of mycoplasmas in boar semen. Nord. Vet.-Med. 1975, 27, 557–561.

    Google Scholar 

  • Ose, E. E. & O. A. Muenster: Isolation of Mycoplasma dispar from cattle in the United States. Vet. Rec. 1975, 97, 97.

    Article  CAS  Google Scholar 

  • Rosendal, S. & F. T. Black: Direct and indirect immunofluorescence of unfixed and fixed mycoplasma colonies. Acta path, micro-biol. scand. Section B 1972, 80, 615–622.

    CAS  Google Scholar 

  • St George, T. D., Nicola Horsfall & N. D. Sullivan: A subclinical pneumonia of calves associated with Mycoplasma dispar. Aust. vet. J. 1973, 49, 580–586.

    Article  Google Scholar 

  • Thomas, L. H. & G. S. Smith: Distribution of mycoplasmas in the non-pneumonic bovine respiratory tract. J. comp. Path. 1972, 82, 1–4.

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Friis, N.F. Mycoplasma Dispar As a Causative Agent in Pneumonia of Calves. Acta Vet Scand 21, 34–42 (1980). https://0-doi-org.brum.beds.ac.uk/10.1186/BF03546898

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://0-doi-org.brum.beds.ac.uk/10.1186/BF03546898

Keywords