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Bacte Lab (Midterm) > 1.2.1 Environmental factors influencing the Growth > Flashcards

1.2.1 Environmental factors influencing the Growth Flashcards

1
Q

What are the Environmental factors influencing the growth of bacter?

A

pH
Temp
Gaseous composition

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2
Q

Optimal growth between 10 C to 20 C

A

Psychrophiles

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3
Q

Optimal growth between 20 C to 40 C

A

Mesophiles

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4
Q

Optimal growth between 50 C to 60 C

A

Thermophiles

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5
Q

Example of psychrophiles bacteria?

A

Moraxella
Flavobacterium
Moritella
Vibrio
Pseudomonas

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6
Q

Example of Gram positive psychrophiles?

A

Arthrobacter
Bacillus
Micrococcus

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7
Q

Example of Mesophiles

A

S. aureus
E. coli
Streptococcus pneumoniae
Strep. pyogenes
Heamophilus influenzae

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8
Q

Example of Thermophiles?

A

Thermus aquaticus
Thermococcus litoralis

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9
Q

Use as Biological indicator for autoclave?

A

Geobacillus stearothermophilus

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10
Q

The temperature for routine incubation in microbiological practices?

A

35°C ± 2

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11
Q

Optimal growth at pH <6.5

A

Acidophiles

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12
Q

Optimal growth at pH 6.5 - 7.5

A

Neutrophiles

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13
Q

Optimal growth at pH 7.5>

A

Alkaliphiles

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14
Q

Example of Acidophiles?

A

Lactobacillus

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15
Q

Example of Neutrophiles?

A

E. coli
Staph
Salmonella

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16
Q

Example of Alkaliphiles?

A

Vibrio cholerae

17
Q

Vibrio cholerae grows best at?

A

8 but can still grow at 11

18
Q

Requires oxygen for growth?

A

Obligate aerobes (Seen in top part of the tube)

19
Q

Example of Obligate aerobes?

A

Nocardia
Citrobacter
Klebsiella
Proteus
Salmonella
Mycobacterium tuberculosis

20
Q

Cannot grow in the presence of oxygen

A

Obligate anaerobes (Seen in the bottom part of the tube)

21
Q

Example of obligate anaerobes?

A

Bacteroides fragilis
Lactobacillus
Clostridium
Fusobacterium

22
Q

Can grow either with or without oxygen

A

Facultative anaerobes (Can be seen in the whole tube but predominantly seen on the top of the tube

23
Q

Example of facultative anaerobe

A

E. coli
Pseudomonas aeruginosa
Staph
Listeria
Salmonella
Shewanella
Yerisnia

24
Q

Can survive in the presence of Oxygen but do not use oxygen in metabolism

A

Aerotolerant anaerobes

25
Q

Example of Aerotolerant anaerobes

A

Streptococcus spp.

26
Q

Requires a reduced level of oxygen to grow

A

Microaerophiles

27
Q

Example of microaerophiles?

A

Campylobacter jejuni

28
Q

How many percent of oxygen required for campylobacter jejuni?

A

5-6%

29
Q

Requires an atmosphere enriched with extra carbon dioxide (5-10%)

A

Capnophiles

30
Q

Example of Capnophiles?

A

Neisseria gonorrhoeae

Bacte Lab (Midterm) (9 decks)

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