When an organism is infected with BK for the first time, it is called primary infection. The subject most often presents no symptoms of tuberculosis.
At primary infection, the only apparent sign is the turn of the cuti-reaction. At this stage of the disease, the patient is not contagious.
Following a primary infection, the patient can develop several months - even years - later a tuberculosis disease. The symptoms vary depending on the clinical form. The most common is the pulmonary form. It associates general symptoms: evening fever (present in the evening), night sweats, fatigue, weight loss; and respiratory symptoms: oily cough, blood in sputum, and chest pain.
Tuberculosis disease is contagious: the bacteria is transported in saliva droplets and in sputum. Koch's bacillus remains suspended in the air. Confined atmospheres and promiscuity are conducive to the passage of bacilli from one individual to another.
Other forms of tuberculosis exist. In this case, the infectious foci are located outside the lung: bone tuberculosis such as Pott's disease in the spine, the neurological form with tuberculous meningitis, especially in children, digestive tuberculosis, tuberculosis uro- genital, etc. The symptoms of the disease depend on its location. Several clinical forms can co-exist in the same patient.
To make the diagnosis of tuberculosis, it is necessary to highlight the bacterium (BK) in the sputum, in abscess samples, in the blood, and / or in the urine ...