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:

Coccobacilli
Ex: Escherichia coli - Traveler's diarrhea

Bacilla: curved shaped, comma shaped
give the example:

Vibrio
Ex: Vibrio cholerae - cholera

Spirals:short and rigid cells
give the examples:

Spirillum
Ex: Campylobacter jejuni - Enteritis, diarrhea
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Bacteria that can have Lyme disease (transmitted through ticks)

Borrelia burgdorferi

Leptospirosis - urine of rats and rodents

Leptospira interrogans

Gram reaction serves as an extremely important “clue” when attempting to learn the identity of the species

BASED GRAM STAINING RESULT

First man who use gram staining

Hans christian gram

SPIRALS require______! Do not pick up the Crystal violet or the Safranin!

SPECIAL STAINS

They do not contain cell wall hence they won't pick up the primary stain or counterstain.

ACID FAST ORGANISMS

  • have the ability to move
  • have flagella
  • can find in spiral is axial filaments (like corkscrew motion)

Motile

  • Bacteria that ONLY grow in an AEROBIC (i.e.,
    20%–21% O2) environment
  • This bacteria needs the same content of air
    that humans need

Obligate Aerobes

Require O2 concentrations LOWER than that found in room air (5%

Microaerophiles

  • Can grow ONLY in an ANAEROBIC
    environment (w/o oxygen); oxygen is toxic to
    these bacteria

Obligate Anaerobes

  • Grows better in the absence of oxygen, but
    can survive in atmospheres containing oxygen.
    However, they do not utilize the available
    oxygen
  • Aerotolerant Anaerobe

    • Survive in either the presence or the absence
      of oxygen
    • However, they utilize oxygen whenever
      available

    Facultative Anaerobes

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