Learning Goal - Study the definition of bacteria; morphology, binary fission, gram positive and negative
15 important questions on Learning Goal - Study the definition of bacteria; morphology, binary fission, gram positive and negative
Bacilli: short bacilli with rounded ends
give the example:
Ex: Escherichia coli - Traveler's diarrhea
Bacilla: curved shaped, comma shaped
give the example:
Ex: Vibrio cholerae - cholera
Spirals:short and rigid cells
give the examples:
Ex: Campylobacter jejuni - Enteritis, diarrhea
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Bacteria that can have Lyme disease (transmitted through ticks)
Leptospirosis - urine of rats and rodents
Gram reaction serves as an extremely important “clue” when attempting to learn the identity of the species
First man who use gram staining
SPIRALS require______! Do not pick up the Crystal violet or the Safranin!
They do not contain cell wall hence they won't pick up the primary stain or counterstain.
- have the ability to move
- have flagella
- can find in spiral is axial filaments (like corkscrew motion)
- Bacteria that ONLY grow in an AEROBIC (i.e.,
20%–21% O2) environment
- This bacteria needs the same content of air
that humans need
20%–21% O2) environment
that humans need
Require O2 concentrations LOWER than that found in room air (5%
- Can grow ONLY in an ANAEROBIC
environment (w/o oxygen); oxygen is toxic to
these bacteria
environment (w/o oxygen); oxygen is toxic to
these bacteria
can survive in atmospheres containing oxygen.
However, they do not utilize the available
oxygen
- Survive in either the presence or the absence
of oxygen
- However, they utilize oxygen whenever
available
of oxygen
available
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