d8or9iOlolanleod d8or9iOlolanleod
  • 01-05-2017
  • Biology
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Rickettsias are extremely small and were once thought to be viruses. why are they now considered bacteria?

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Erudite1
Erudite1 Erudite1
  • 08-05-2017
Rickettisias are now considered as bacteria because they have the characteristics of been spread by arthropods vectors, the cells are extremely small and can be rod shaped or coccoid and they have typical bacterial cell walls. They have no flagella, they are gram negative and multiply by mean of binary fission only in their hosts cells.
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