How to identify rubella, measles and scarlet fever?

These three diseases are systemic diseases of measles, and are infectious. The measles and scarlet fever have occurred in children. Rubella and Measles is caused by a virus, scarlet fever is caused by bacteria. The clinical manifestations of three different characteristics, from the following areas were identified: (1) The incubation period for rubella 14 to 21 days; Measles 9 ~ 11 days; Scarlet fever for two to five days. (2) of rubella as a precursor to two days, a slight fever, headache, angina, burnout; Measles for four days of high fever, photophobia, moderate to severe respiratory symptoms, we can see Coriolis spot; Scarlet fever about a day, showed a sudden high fever and angina. (3) Date of measles and rubella average 1 to 2 days; Measles 3 ~ 5 days; Scarlet fever continued for 2 to 4 days. (4) Distribution rashes are systemic, only rubella more sparse. But three of the sequence is similar rash, all face, trunk and limbs were rash. (5) for the rash of rubella and pink skin rash, sparsely scattered, chest can be a little fusion, measles to purple to brown and red skin rash, chest in a casual, face significantly fusion; Scarlet fever for diffuse small-intensive Scarlet splash point, the pressure fading, Paper Skin fold, as Zhou Wan, armpit, groin and other places rash intensive, forming dark red lines (principally line), and I could see his face pale and Central Yangmei-like tongue. (6) After scaling the measles and rubella have mild scaling, was dual-bran; Measles was husk of common; Scarlet fever scaling more serious, the hand, foot and peeling large, sometimes as gloves, mouse-like, may have severe hair loss. (7) laboratory tests of blood early as scarlet fever increased, the total number of leukocytes and neutrophils increased from 2,3 course of eosinophils often mild increase of leukocytes; No measles and rubella or changes such as blood. Scarlet fever patients with throat secretions or other training, broken down into group A hemolytic streptococcus B, measles or rubella patients with tissue culture can be isolated from the corresponding pathogens, but in general there is no need to do the screening.