YOUR CHILD’S HEALTH CARE/MEDICAL PROCEDURES AND TESTS: SWEAT TEST AND THROAT SWAB

SWEAT TEST

This is a test which is used to confirm the diagnosis of a genetically inherited disorder called cystic fibrosis (see p. 200). The concentration of salts in the sweat is measured. In children with cystic fibrosis, the level is much higher than normal.

THROAT SWAB

If your child has a sore throat, your doctor may suggest doing a throat swab. This is a brushing of the back of the throat with a sterile long cotton bud, which is then placed in a special container and sent to the laboratory. The sample is checked under a microscope and some is brushed onto a special culture medium and incubated for 48 hours, in an attempt to grow the germ causing the infection. Many throat infections are due to viruses but certain germs, such as Streptococcus, can also be the cause. It is definitely advisable to do a throat swab if your child has pus on his tonsils. The procedure also helps to determine which antibiotic will be effective against the specific germ found.

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