Are 'treatment,' 'releasing,' 'enumerated,' and 'if not' correctly used in the sentences?

Are 'treatment,' 'which means,' 'releasing,' 'enumerated,' and 'if not' correctly used in the sentences?

My cousin, a health officer, discussed tuberculosis, its causes and effects, and its treatment. “The bacteria called called Mycobacterium tuberculosis usually attack the lungs,” he explained, “but they can damage other body parts as well. TB spreads by droplet infection, which means that a TB patient exhales droplets of fluid containing the bacteria, releasing them into the air." He enumerated the symptoms of TB, such as as a bad cough that lasts three weeks or longer, coughing up blood or mucus, fever, night sweats, weakness or fatigue, loss of appetite, and weight loss. He reiterated that skin tests, blood tests, x-rays, and other tests can tell if one has TB and that TB can be deadly if not treated properly.