W. David Colby IV MSc MD FRCPC


Neisseria Meningitidis

Meningitis caused by Neisseria meningitidis is sometimes referred to as meningococcal disease. Some people have Neisseria meningitidis in their throats without getting sick. But they can pass it to another person, who may get sick. Neisseria meningitidis causes meningitis in about 25 out of 100 people who get the…

Tuberculin Skin Test

A tuberculin skin test (also called a Mantoux tuberculin test) is done to see if you have ever been exposed to tuberculosis (TB). The test is done by putting a small amount of TB protein ( antigens ) under the top layer of skin on your inner forearm. If you have ever been exposed to the TB bacteria ( Mycobacterium…

Medición de la reacción a una prueba de la tuberculina en la piel

Entre dos y tres días después de realizarse una prueba de la tuberculina en la piel, se mide el tamaño de cualquier bulto que se encuentre en el lugar. Su riesgo de tener TB y el tamaño del bulto se usan para determinar si la prueba es: Positiva, lo que significa que ha sido infectado con la bacteria de la TB. Negativa…

Malaria

What is malaria? Malaria is a serious disease that causes a fever and other flu-like symptoms. You can get it from a bite by an infected mosquito. Malaria is rare in the United States. It is found in over 90 countries around the world, mainly in Africa, Asia, Oceania, South America, and Central America. The risk of…

Rapid Sputum Tests for Tuberculosis (TB)

Rapid sputum tests are used to diagnose tuberculosis (TB) when other tests show that a person probably has TB. Rapid sputum tests are also called nucleic acid amplification tests (NAATs). One of the best ways to diagnose TB is through a sputum culture. A sputum culture is a test to find germs (such as TB bacteria) that…