Measles

Generalities
Agent	Measles virus, genus morbillivirus, family paramyxoviridae
Incubation period	10 days (7-18 days, may be to 21 days)
Period of transmissibility	4 days before rash and 4 days after rash onset
Reservoir	Humans
Modes of transmission	- Person-to-person: direct contact with droplets, rarely indirect contact - Airborne (if confined place)
Clinical presentation	- Febrile maculo-papular rash - Complications: otitis media (7-9%), pneumonia (1-6%), gastro-enteritis (8%) and dehydration, blindness, convulsions (1/200), encephalitis (1/1000) - Encephalitis: post-infectious encephalitis 1 week from onset; or acute encephalitis of delayed type weeks and months after onset) - Long term complication: sub-acute sclerosing pan-encephalitis SSPE, 7 years or more after onset (1/25000 case, and 1/8000 if onset under 2 years old) - Case fatality: 3-6% in developing countries, 1-3/1000 in developed countries
Resources
Case definition	MOPH circular no 11 (2013)
Forms	- Rash reporting form - Rash investigation form
Guideline	Measles surveillance guideline: Ar, En, Fr
Data	- Weekly report