Wellcome uses cookies.

Read our policy
Skip to main content
2 results
  • Spores of Bacillus pestis which caused the plague and its vector the human flea (Pulex irritans). Coloured drawing by A.J.E. Terzi.
  • Spores of Bacillus pestis which caused the plague and its vector the human flea (Pulex irritans). Coloured drawing by A.J.E. Terzi.