Microbio lab quiz 10/12

Aerobic

O2 is required

Anaerobic

O2 is not required

Clostridium botulinum

Obligate anaerobe that produces lethal toxin that causes botulism

Obligate anaerobe

Bacteria that requires oxygen absent to grow (oxygen is toxic to them)

Obligate aerobe

Bacteria that requires oxygen present to grow

Electron receptors for anaerobic bacteria

Nitrates, sulfates

Electron receptors for aerobic bacteria

Oxygen

Microaerophiles

Bacteria that require less than 20% of oxygen to grow

Facultative anaerobes

Bacteria that will use O2 if present, but is not required for growth

Aerotolerant anaerobes

Bacteria that is indifferent/tolerant to oxygen concentration

Fluid thioglycolate medium (FTM)

Rich liquid containing growth factors and water, also

Thioglycolate

reduces oxygen to water

Two dyes that make up thioglycolate

Resazurin and methylene blue

Dye that turns pink in presence of O2

Resazurin

Methylene blue

Blue in O2, white/colorless in absence of oxygen