Mycobacterium Flashcards
slender, slightly curved or straight, rod-shaped organisms 0.2 to 0.6
μm × 1 to 10 μm in size.
mycobacteria
take up dye with increased staining time or application of heat but resist
decolorization with acid-ethanol
Mycobacteria
They are nonmotile and do not form spores.
mycobacteria
TB is one of the oldest documented communicable diseases
M.tuber
TB is one of the oldest documented communicable diseases
M.tuber
Biochemically, It is characteristically positive for niacin accumulation, reduction of nitrate
to nitrite, and production of catalase
M.tuber
produces TB primarily in cattle but also in other ruminants, as well
as in dogs, cats, swine, parrots, and humans.
M.bovis
These organisms are common environmental saprophytes and have been
recovered from soil, water, house dust, and other environmental sources.
Mycobacterium avium and Mycobacterium intracellulare
It is the causative agent of Johne disease, an intestinal infection occurring as a
chronic diarrhea in cattle, sheep, goats, and other ruminants
Mycobacterium avium subsp. Paratuberculosis
o It is the cause of disseminated infections in patients with AIDS
Mycobacterium genavense
o It second to MAC as the cause of Nontuberculous Mycobacteria
o The most common manifestation is chronic pulmonary disease involving the
upper lobes, usually with evidence of cavitation and scarring
Mycobacterium kansasii
It occurs primarily in patients who are immunocompromised.
o Submandibular lymphadenitis, subcutaneous nodules, painful swellings, ulcers
progressing to abscesses, and draining fistulas are often the clinical
manifestations
Mycobacterium haemophilum
Cutaneous infections in humans occur when traumatized skin comes into contact
with salt water or inadequately chlorinated fresh water containing the organism
Mycobacterium marinu
appears as a short coccobacillus without cross bands on acidfast–stained smears
Mycobacterium malmoense
o Causes cervical lymphadenitis in children.
Mycobacterium scrofulaceum
o Original strains were isolated from the lymph nodes of monkeys
Mycobacterium simiae
o The most common manifestation is pulmonary disease similar to TB
Mycobacterium szulgal
o It is a rare cause of mycobacteriosis, also referred to as Buruli ulcer
Mycobacterium ulcerans
is the causative agent of Hansen disease, an infection of the skin,
mucous membranes, and peripheral nerves
Mycobacterium leprae
o It has been recovered from hot and cold water taps and birds
Mycobacterium xenopi
s the species of rapidly growing mycobacteria most likely isolated
from disseminated cutaneous infections in immunocompromised patients
M. chelonae
