113: Measles

Classification: ICD-9 9055.0; ICD-10 B05

Synonyms: Rubeola, morbilli.

Agent: Measles virus, a single-stranded RNA negative-sense morbillivirus, family Paramyxoviridae.

Reservoir: Humans.

Transmission: By airborne droplets from or contact with nose and throat secretions of infected persons, very high from 4 days before to 4 days after rash appears, or with fomites contaminated with those secretions. Droplets remain infectious for several hours, longer under conditions of low humidity. Measles virus is highly contagious.

Incubation period: Median 12.5 days, range 1–3 weeks.

Clinical findings

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