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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