Letter | Published:

Host Specificity of Brazilian Strains of Pasteurella pestis


WE have examined eleven strains of Pasteurella pestis isolated by M. Bahmanyar, Y. Karimi and C. Rodrigues de Almeida in an inveterate focus of plague at Exu, Pernambuco, Brazil, and sent to us by M. Baltazard. We have confirmed the curious behaviour observed by these investigators, with all of nearly 200 such isolates from this focus, that Exu strains show high pathogenicity for mice but apparently are innocuous for guinea-pigs (M. Baltazard, personal communication). We have tried to explain this host-specificity by comparing the behaviour of these isolates with that of a typical fully virulent strain MP6, which is highly pathogenic for both these species.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Burrows, T. W., and Gillett, W. A., J. Gen. Microbiol., 45, 333 (1966).

  2. 2

    Broome, J. D., Nature, 191, 1114 (1961).

  3. 3

    Old, L. J., Boyse, E. A., Campbell, H. A., and Daria, C. M., Nature, 198, 801 (1963).

  4. 4

    Stein, W. H., and Moore, S., J. Biol. Chem., 211, 915 (1954).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.