ch 19, mycobacteria and legionellae Flashcards
according to WHO, nearly how many people have a disease caused by mycobacteria?
1/3
mycobacteria cause……
leprosy and tuberculosis
which 4 mycobacterium cause tuberculosis?
M. tuberculosis, M. Bovis, M. africanum
with mycobactium cause leprosy?
mycobacterium leprae
where is mycobacterium tuberculosis found in the human and where does it reside?
found in the lungs and resides in reticuloendothelial system
mycobacterium contains long chains of fatty acicds which require a special stain. What stain?
ziehl-neelsen stain
mycobacterium tuberculosus primarily affects the lungs but can effect the…..
oral cavity
what is MDR-TB?
multidrug-resistant tuberculosis. This causes a huge problem in keeping TB under control
what vaccine is given to prevent TB?
bacille calmette-guerin ( BCG) vaccination which has live attenuated organisms.
how does one get mycobacterium bovis and what childhood disease can it cause?
milk from contaminated cows. It causes scrofuloderma in children which causes enlarged caseous cervical lymph nodes.
mycobacterium leprae is found in what species?
only humans
pathogenicity of leprosy
slow progressive chronic disease that affects the skin and nerves in cooler parts of the body
what are the 2 types of leprosy?
lepromatous leprosy- depresses cell mediated immunity
tuberculoid leprosy- associated with a intense cell-mediated immune response to the organisms.
what is MOTT?
mycobacteria other than tuberculosis
where is MOTT found?
soil, water, birds, animals.
it usually cause pulmonary problems
