A Closer Look at Tuberculosis – Microbiologically, Clinically, and Miliary
Tuberculosis (TB) is an infectious disease that affects the lungs, but can also affect other organs in the body. It is caused by a bacterium called Mycobacterium tuberculosis. TB is preventable and treatable, yet it remains one of the top 10 leading causes of death worldwide. Let’s take a closer look at the three different types of TB—microbiologically, clinically diagnosed, and miliary TB—to better understand this disease and its effects on the body. Microbiologically Diagnosed TB This type of TB is diagnosed through laboratory testing. This includes sputum tests for acid-fast bacilli (AFB), cultures to detect bacteria growth, as well as molecular testing using PCR or DNA sequencing to detect bacterial DNA. Microbiological tests are used to identify which strain of bacteria is causing the infection and whether or not it’s drug resistant. Clinically Diagnosed TB Clinically diagnosed TB means that the diagnosis was made based on clinical signs and sym...