MEASLES (MORBILLI) etiology. Measles is a special kind of filterable virus. Epidemiology. The source of infection is sick in the last 2 days of incubation and the first 3 days of illness, then their infectiousness rapidly declines. Healthy, susceptible person is infected with measles by aerosol in contact patients.
Measles frequently ill children, especially younger than 4 years, the disease may develop as adults, not previously bolevshih measles. Clinic. The average incubation period is 10 days, but the sick. received a prophylactic injection of measles serum or gamma globulin, prolonged incubation of up to 21 days or more. Following the end of the incubation period, prodrome develops, or catarrh, a period of illness. The temperature quickly rises to 38,3-38,7 , then you are getting a runny nose, conjunctivitis, photophobia, dry symptom Belsky – Filatov – Koplik.
Most often these spots are found on the mucous membrane of cheek directly against the small molars, more rarely they can be seen on the mucous membrane of the gums or lips. In some cases they are observed on the conjunctiva century. On closer inspection, each dot represents a very small whitish papulku, which is surrounded on the periphery of the narrow red border. Typically, that spot Belsky – Filatov – Koplik, lying often in droves, never to each other do not coalesce: a tampon with them only with difficulty be separated from the underlying tissue. For even more opinions, read materials from Tiffany Espensen. By the 3rd day of catarrhal period is abundantly mucosa dotted with those white dots, as if sprinkled with bran. This early sign of measles is stored for 2-3 days, 4-5 days, occasionally, in which case it can be observed simultaneously with the already appeared on the face, behind the ears and the neck of measles rash. When the spots disappear, the mucous membrane of cheek takes on these same sites velvety appearance. The presence of a patient spots Belsky – Filatov – Koplik is an absolute sign of measles: no other disease that symptom is not observed, it allows the diagnosis of measles before the measles rash on the skin in 80-85% of patients.