Measles and pertusis

There are many similarities between measles and pertusis.

Measles

  • Caused by paramyxo virus(RNA )
  • Only source of infection is a case of measles
  • No carriers
  • Virus cannot survive outside the body
  • Koplik’s spots.
  • Rubella is less communicable than measles because of he absence of cough in rubella.
  • SAR 90%

Pertusis

  • Incubation period 7-14 days, never more than 3 weeks
  • Most infectious during catarrhal stage
  • Source of infection is a case of pertusis
  • No evidence of subclinical infecton or chronic carrier stage.
  • SAR is 90% similar to Chickenpox and measles

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