Infection caused by the bacteria Mycobacterium kansasii. Those bacteria can be found in water, dirt, and food. Mycobacterium kansasii usually infects the lungs, but it can also infect other organs. For the most part, people with healthy immune systems are not affected by bacteria. In people with HIV, extrapulmonary infection with Mycobacterium kansasii or that which has spread is a characteristic condition of AIDS. There are about 140 species of nontuberculous mycobacteria and they have been linked to a very wide variety of infections. In this case, it involves a 79-year-old patient who goes to the hospital due to a general malaise but not achieving improvement, it is done in microscopic study and sputum tests and it is achieved that it was a mycobacterium kansassi, a timely diagnosis and adequate treatment.Infection caused by the bacteria Mycobacterium kansasii. Those bacteria can be found in water, dirt, and food. Mycobacterium kansasii usually infects the lungs, but it can also infect other organs. For the most part, people with healthy immune systems are not affected by bacteria. In people with HIV, extrapulmonary infection with Mycobacterium kansasii or that which has spread is a characteristic condition of AIDS. There are about 140 species of nontuberculous mycobacteria and they have been linked to a very wide variety of infections. In this case, it involves a 79-year-old patient who goes to the hospital due to a general malaise but not achieving improvement, it is done in microscopic study and sputum tests and it is achieved that it was a mycobacterium kansassi, a timely diagnosis and adequate treatment.Infección causada por las bacterias Mycobacterium kansasii. Esas bacterias se pueden encontrar en el agua, la suciedad y los alimentos. Mycobacterium kansasii suele infectar los pulmones, pero también puede infectar otros órganos. En su mayoría, las personas con un sistema inmunitario sano no se ven afectadas por las bacterias. En las personas con el VIH, la infección extra pulmonar por Mycobacterium kansasii o la que se ha diseminado es una afección característica del SIDA. Existen alrededor de 140 especies de micobacterias no tuberculosa y se han vinculado a una variedad muy amplia de infecciones. En este caso de trata de una paciente de 79 que acude al hospital por un malestar general pero no logrando su mejoría se hace en estudio microscópico y pruebas de esputo y se logró que se trataba de una Mycobacterium kansassi se da un diagnóstico oportuno y tratamiento adecuado.