BACTERIAL PHYSIOLOGY AND GROWTH REQ Flashcards
Obligate aerobe requirements
21% O2, 0.03% CO2
Usual incubator for obligate aerobe
Ambient air/Room air
Microorganisms in obligate aerobe
Fungi, Mycobacterium tuberculosis (MTB), Brucella, Bordetella
Obligate anaerobe requirements
0% O2, 5-10% H2, 5-10% CO2, 80-90% N2
Usual incubator for obligate anaerobe
Gas Pak Jar, AnaeroPack, Palladium, Brewer jar, McIntosh & Fildes
Microorganisms in obligate anaerobe
Clostridium, Bacteroides
Facultative anaerobe requirements
Do not require O2 but grow better with O2
Usual incubator for facultative anaerobe
Ambient air/Room air
Microorganisms in facultative anaerobe
Enterobacteria (Most pathogens)
Aerotolerant anaerobe requirements
Grow at the same rate with or without O2
Usual incubator for aerotolerant anaerobe
Ambient air/Room air
Microorganism in aerotolerant anaerobe
Cutibacterium (Propionibacterium) acnes
Bacteria’s dry weight
50% Carbon and 14% Nitrogen
Use Carbon dioxide as sole source of carbon
Autotrophs
Use light as source of energy
Phototrophs
Use inorganic compounds as source of energy
Chemolithotrophs
Require complex substances for growth; require organic substances for energy; clinically significant bacteria causing human infection
Heterotrophs
Psychrophiles/Cryophiles (0-20ºC); Refrigerator contamination
Listeria, Y. enterocolitica