Breathing problems and fever are two common symptoms of M. kansasii
infection, along with night sweats, chills, weight
loss, muscle wasting, abdominal pain, fatigue
(often caused by anemia), and diarrhea.
M. kansasii can also cause enlargement of the liver and spleen,
as well as the lymph nodes.
To diagnose M. kansasii infection, x-rays usually show disease
of the lungs cause by the bacteria. CT scans can also be performed to
take a closer look at the lungs if the x-ray does not show any telltale
signs of infection. If the x-ray or CT scan shows signs of infection,
sputum samples (phlegm) are collected and analyzed by a laboratory. Blood
samples may also be collected to determine if the bacteria has escaped
into the bloodstream and possibly spread to other organs in the body.
Another test that might be necessary is a bone-marrow biopsy, to see if
the infection has spread to the bone marrow. To collect a sample of bone
marrow, a doctor inserts a needle into the hip bone, usually near the
top of the butt or the lower back.