The Mantoux test

The Mantoux test ( Tuberculin skin test) is necessary prior to BCG vaccination. BCG should not be administered to any individual with a positive  result. If BCG is given unnecessarily it can cause a severe local reaction.

BCG can be given up to three months following a negative tuberculin test.

The Mantoux Test consists of a very superficial injection (intracutaneous) into the inside surface of the left forearm. A very small quantity (0.1ml) of Tuberculin PPD SSI (2TU/0.1ml) is used. Initially a small bleb will occur.

Mild itching, swelling or irritation may occur over the next 48hrs. These are normal reactions that do not require any treatment. You must try to avoid scratching the site and keep the site clean and free from creams, lotions or adhesive dressings.

The results should be read 48-72 hours after the test is taken. The transverse diameter of the area of induration is measured with a ruler. (any redness is ignored) and it is this measurement that signifies whether your test is positive or negative.

If it is negative, it is recommended that you receive your BCG vaccination.

Factors affecting the result of the Mantoux Test (reduced response):

• Glandular Fever
• Viral infections in general, including those of the upper respiratory tract
• Live viral vaccines e.g. MMR (tuberculin testing should not be carried out within 4 weeks of having received a live viral vaccine)
• Sarcoidosis
• Steroid therapy , (aerosols or topical treatments are not contraindicated)
• Immunosuppression due to disease or treatment, including HIV infection.

If any of the above apply then a Mantoux Test  should not be taken.

When you book your Mantoux Test , you will need to book a second consultation (48-72 hours later) in order for the test to be read. At that second consultation if your Mantoux Test result is negative, you will be given your BCG vaccination.

For any further advise or information, please phone 01246-590530