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12 Cards in this Set

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Fungi

ex

Review
Microsporum (Ringworm)
Bacterial morphology

Round bacteria
cocci

Streptoccoci characteristics
Staphylococci
diplococci
sarcinae
Strep divide in 1 plane; chain

Staphylococci divide in 2 planes; cluster

diplococci divide in 2 planes + split

sarcinae divide in 3 planes
Bacteria morphology

types
1. round bacteria (cocci)

2. elongated cocci (short rods)

3. rod shaped bacteria (bacilli)
Bacterial morphology

Rod shaped bacilli
types
round or squared rods
fusiform 2 pts
vibrion 1 pt
spirilla
filamentous
Composite bacterial cell

Flagella

describe
3-12 um thick x .02 um long
organs of motility

not muscular, motility by basal organ
unique protein: flagellin antigenic

detect by microscopy- wet prep
Composite bacterial cell

Fimbrae (pilli)
shorter 1.5 x .1 um
adhesion

sex reproduction
transfer of plasmids

virulence factor
Composite bacterial cell

Capsule
Glycopolysaccharide

slippery

virulence factor

evasion of phagocytosis
Bacterial nucleus

Describe
composition
ss DNA
often in continuous loop
No chromosomes
No mitotic apparatus
Gm stain: not visible
not readily visible; dispersed
Bacterial cell division

Describe
Binary fission
DNA strand divides

Mesosome: attachment pt for DNA, forms septum, dau cells split @ septum
Spores

Found only in Clostridia and Bacillus sp.

Clostridia
Clostridia:
anaerobic, obligate anaerobes
spore forming, Gm + bacilli
produce exotoxins

Bacillus:
gm+ facultatively anaerobic
anthrax
L forms
of bacteria
Pleomorphic
lost ability to form a cell wall

Pathogenic are Mycoplasma pneumoniae
Oxygen requirements

Anaerobes
aerobes
facultative anaerobes
micro-aerophilic
Anaerobes: no oxygen
aerobes: Oxygen
facultative anaerobes: tolerate oxygen
micro-aerophilic: require a trace of oxygen and us. prefer a high CO2 level