First type hepatitis has illness coming on the characteristic controls _'s symptom

First type hepatitis has illness coming on the characteristic controls _'s symptom
Onset characteristic
First type hepatitis ( Abbreviated as hepatitis A) From infecting to have illness coming on ' Incubation period) Pass one about month nearly, get up disease to be worried, have, generate heat more, the intersection of digestive tract and symptom (lose the appetite, detest greasy, sick, vomit, the intersection of abdominal distension and pain) Obvious, the color of urine is strengthened, it is caught that the sclera, skin are yellow, hepatomegaly, there are more jaundice cases, probably above 65%, relatively hepatitis B is light in the condition, the case fatality rate is low, it is chronic to seldom change into, but infective and strong, easy to present popularly.
Before hepatitis A has illness coming on ' Latent end) Have infective the stronger one, and recessiveness is infected (avoid clinical symptom) Large percentage,so it is difficult to be find it infect by source and it control,there are the main reason that hepatitis A is easy to break out prevailingly on this.
First, the characteristic prevails
In known five type virus hepatitis, hepatitis A has illness coming on and takes the first place, occur frequently with children and teenagers. Because of the intersection of people and improvement of living standard, prevent disease enhancement of consciousness and in light hepatitis A vaccine inoculation of age group, it has trend shifted to the great age group that hepatitis A has illness coming on in recent years, the proportion of suffering from hepatitis A between twenty and fifty obviously increases at present. Hepatitis A have illness coming on have obvious seasonality, have two have illness coming on peak will it be season spring and autumn every year, according to the analysis, the influence that the peak is had illness coming on by the urban area more in spring in this city, the influence that the peak is had illness coming on by the countryside more in autumn. It has larger fluctuation, the trend that the level of its morbidity has illness coming on influencing hepatitis of an area directly that hepatitis A has illness coming on.
Two, propagate the route
Hepatitis A travel through excrement - the intersection of port and route mainly, hepatitis A patient or recessive the infeted discharge the virus from the excrement and urine, source of water of pollution, food, hand or other articles, pass to others.
Three, precautionary measures
1st, improve the consciousness of preventing disease before a meal and then wash hands, hold the disease and enter the GATT from the mouth.
2, change the eating habit to reduce or not have dinner in the dining table of the road, does not drink the unboiled water (especially the drinking water of rural deep well) ,Eat after guaranteeing to boil the aquatic products. Careful to eat the products cold and dressed with sauce that the individual street peddler sold.
3rd, carry on the whole city of vaccine inoculation of hepatitis A to susceptible persons before pursuing the vaccine inoculation of hepatitis A, the crowd hepatitis A antibody has relatively low level, especially children are more obvious. The positive rate of hepatitis A antibody of children under the age of 15 of urban area is here 1 0 - 3 0 % Between, between twenty and fifty to reach 70 about only too. So the prevailing possibility that potential hepatitis A breaks out. Since 1995, have launched the inoculation of vaccine of hepatitis A and worked to the school-ager, make hepatitis A of children under the age of 10 have illness coming on to obviously reduce. So except that continue immunizing to little age group children, it is necessary to launch the inoculation of the key crowd between twenty and fifty.
There are two kinds of hepatitis A vaccine used at present, one is vaccine of domestic reducing the poison and living, protect for 3-5 years; Another kind is death vaccine deactivated, in more than 20 years of protection period, choose voluntarily according to the living condition.
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