Mantoux test is compulsory for all children aged from one to 18 years.If a child is not vaccinated with BCG vaccine, it would need to put a sample twice a year.The sample is placed just general health care staff who have been trained in the TB dispensary.
Mantoux test is conducted with limitations: it can not be carried out at home or during the quarantine of infectious diseases.In the Mantoux test and any preventive vaccination should take one month.Exactly the same time you must wait after the child recovers from any acute illness.Prior to sample every child is a general physical examination.
Capsules Mantoux tuberculin filled - an allergen, unable to cause tuberculosis.However, the reaction of the body of the child to the doctor, the sample can draw some conclusions.This explains the need for re-examination of
with expert administration of the allergen under the skin on the surface appears "twist of lemon peel."When it is replaced by a positive response characteristic papule, which in appearance resembles a regular mosquito bite.
Mantoux test is evaluated 72 hours after injection.The doctor measures the size of papules, using a transparent ruler with millimeter divisions.It also measures the size of the infiltrate in cross section.In the absence of papules registered hyperemia.
- negative reaction ukolochnaya 1-2 mm;
- doubtful reaction is diagnosed infiltrate the size of 2-4 mm;
- positive reaction diagnosed infiltrate the size of 5 mm or more;
- is also a risk of the child giperergicheskom body's reaction to the Mantoux test the size of 17 mm or more.
If a child has been vaccinated with BCG vaccine, the first 4-5 years of life, he will always be fixed firmly positive response of more than 5 mm, but not more than 16 mm.With age, it gradually fades away.This phenomenon is considered perfectly normal and is called "postvaccinal allergies."
However, there are other options for the child's body reaction that suggests suspicions about the ineffectiveness of vaccination and its repeated execution.But the alarm when the Mantoux test is accompanied by the appearance of bubbles or enlarged lymph nodes.All these signs point to the fact of the child's infection with the causative agent of tuberculosis.
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