How do children of scarlet fever

Scarlet fever is common in children with acute respiratory tract infection. Is caused by group a b hemolytic Streptococcus. Streptococcus is a big family, a number of groups, a lot. Scarlet fever is caused by group a (group a) b (b) chain of hemolytic bacteria. Only in a group b Streptococcus type enables red blood cell hemolysis occurs, the reason for this is the discharge of Streptococcus hemolysin; also discharged Exotoxin Erythema toxin, rash is Erythema caused by toxins.

Hemolytic Streptococcus in older infants can cause scarlet fever, in the years child care may cause pharyngitis, tonsillitis, skin purulent lesions, these are in fact no rash of scarlet fever. Bacteria present in the sick or carriers of the throat, are spread through saliva droplets with germs. In addition, you can also pass the appliance through the sick exposed indirectly to other children. Limited circumstances, bacteria can wound and enters the body through the skin, caused by surgery of scarlet fever. So, while there is no direct contact with the sick, seems to be no clear source, it is impossible to exclude scarlet fever. After the bacteria enters the body, pathogens and toxins are plays a healing role.

It should be inappropriately Chu. A number of infectious diseases only once in a lifetime, because the body can have a lasting immunity, can occur the second time. But after scarlet fever once, can also be second or even third. There are several reasons for this, one of the reasons is not lasting immunity of illness the body, disappeared after the second. In addition, Streptococcus hemolytic type, and no cross immunity between the various types, due to a certain type of illness, on the prevention of any other function, another type can also let children get sick as usual. There is also a reason is a medication prematurely, germs are controlled, but affect the level of immunity. Not lasting due to low levels of immunity, thus once again be scarlet fever.