CHARACTERISTICS PRACTICE Flashcards
1
Q
Staphylococcus Characteristics:
A
- Gram-Positive
- Facultatively anaerobic
- Divide in all planes
- Daughter cells remain attached
- Non-spore forming
- Not conventionally motile
- Salt tolerant
- Desiccation tolerant
- Radiation and heat tolerant
- Hyaluronidase
2
Q
Streptococci Characteristics:
A
- Gram-Positive
- Facultatively anaerobic
- Catalase negative
- Coagulase negative
- 0.5 -1.2 um diameter
- Non-motile
- Divides in one plane
- Requires blood agar
3
Q
E.coli
A
- Gram negative bacillus
- Oxidase negative
- Motile
- Produces exotoxins (shiga), endotoxins, and cytotoxins
- Facultative anaerobe
- Lactose fermenter
4
Q
Neisseria Characteristics:
A
- Gram-negative diplococci
- non-motile
- Fastidious
- 2 pathogenic species, gonorrhoeae, and meningitidis.
- Obligate aerobes
- Typically inhabit mucous membranes
- Produce polysaccharide capsule
- Oxidase positive
5
Q
Bacillus Characteristics:
A
- Gram-positive rods
- Usually motile (anthracis isn’t)
- Spore forming
- Aerobic or facultatively anaerobic, (anthracis and subtilis are aerobic, cereus is facultatively anaerobic).
- Bacillus subtilis produces bacitracin
6
Q
Clostridium Characteristics:
A
- Gram positive rods
- Spore forming (terminal)
- Obligate anaerobes
- Some motile (difficile/perfringens)
- Some non-motile (tetani/botulinum)
7
Q
What causes farmers lung?
A
Thermoactinomyces vulgaris.
Micropolyspora faeni
Aspergillus
8
Q
Entamoeba histolytica:
A
- Protozoan parasite
- Causes disease in 50mil people worldwide
- Can invade soft tissue sites.
9
Q
Ascaris lumbricoides:
A
- Nematode worm
- One of most common helminth infections
10
Q
Shigella Characteristics:
A
- Enterobacteriaceae
- Gram-negative bacilli
- Unlike many other enterobacteriaceae, non-motile
- Facultative anaerobe
- Non-lactose fermenter
- Known for invasion of epithelium
- Shiga toxin
- S.dysenteriae pathogenic
11
Q
Corynebacteria Characteristics:
A
- Gram-positive rods (V shaped)
- Non-motile
- Facultative anaerobes or obligate aerobes
- Catalase positive
- C.diphtheriae, pathogenic, produces diphtheria toxin.
- Non-spore forming, unlike other G+ rods
- C.jeikeium is lipophilic, needs lipids to grow and survive.
12
Q
Klebsiella Characteristics:
A
- Enterobacteriaceae
-Gram-negative bacilli - Unlike many other enterobacteriaceae, non-motile
- Characteristic large polysaccharide capsule
- Facultative anaerobes
- Lactose fermenters
- Urease positive (E.coli isn’t)
- Pathogenic species is Klebsiella.pneumoniae.
13
Q
Proteus Characteristics:
A
- Enterobacteriaceae
- Gram-negative rods
- Extremely motile (characteristically)
- Urease positive (E. coli isn’t)
- Non-lactose fermenters
- Facultative anaerobe
- P.mirabilis and P.vulgaris are pathogenic
14
Q
Yersinia Characteristics:
A
- Enterobacteriaceae
- Gram-negative rods
- Generally motile
- Produce exotoxins
- Can resist phagocytosis
- Facultative anaerobe
15
Q
Salmonella Characteristics:
A
- Enterobacteriaceae
- Gram-negative rods
- Peritrichous flagella (motile)
- Facultative anaerobe
- Non-lactose fermenter
- S.enterica, S.bongori are pathogenic
- Invasion of epithelium, S.typhi can spread to rest of body
- Produces exotoxins (Typhoid toxin)
