31. Mycobacteria are widespread organisms, typically living in water ( including tap water treated with chlorine ) and food sources.32. Invaders like viruses and mycobacteria , which burrow deep inside the cells, are best fought off with the TH1 lymphocytes. 33. That doesn't tally with the theory that the early exposure to mycobacteria completely knocks out the effectiveness of BCG. 34. TB infection begins when the mycobacteria reach the pulmonary alveoli, where they invade and replicate within endosomes of alveolar macrophages. 35. However, even with these new techniques, the Runyon classification is still sometimes used to organize the mycobacteria into categories. 36. In time, other parts of the ileum and other regions of the body are teaming with millions of the mycobacteria . 37. Macrophages fuse together, forming large cells, called multinucleated giant cells, in an apparent attempt to kill the mycobacteria . 38. Infection from " human papilloma virus ( serotype 16 in particular ), mycobacteria " has also been suggested as a cause. 39. On the contrary, many cases of aseptic meningitis represent infection with viruses or mycobacteria that cannot be detected with routine methods. 40. The more commonly used term is nontuberculous mycobacteria ( NTM ) infection, or non-tuberculous mycobacterial infection ( NMI ).
