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Dictionary » F » Facultative

Facultative

Definition

adjective

(1) Not compulsory; not restricting.

(2) Of, or relating to, mental faculty.

(biology) Capable of existing to more than one set of (environmental) conditions or by assuming various behaviors.


Supplement

For example, facultative bacteria can thrive in both aerobic and anaerobic environments.


Word origin: NL facultātīvus.
Related forms: facultatively (adjective).

Compare: obligate (biology).

Related terms:


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Needing help identifying uknowns for micro lab

... negative Gram negative negative Rod 2x1 3 to 4x1 Motile non pos PR lactose pos negative PR glucose pos pos Litmus alkaline didn't test FTM facultative aerobic Catalase negative negative MR pos pos VP pos Starch negative hydrolysis Amylase negative pos TSI yby ry Gas pos negative H2S pos ...

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by avon7774
Wed Jul 29, 2009 10:35 pm
 
Forum: Microbiology
Topic: Needing help identifying uknowns for micro lab
Replies: 1
Views: 101

Methods Identifying Unknown Bacteria?

Isn't the first thing to do is a Gram stain? And then find out if it is anaerobic, aerobic, or facultative? then look at it under a microscope for its shape? what about the media that it can grow on? put different antibiotics in the media and see if it still can grow on it?

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by kolean
Wed Jul 22, 2009 12:42 pm
 
Forum: Microbiology
Topic: Methods Identifying Unknown Bacteria?
Replies: 5
Views: 226

Help w/ unknown

I have the following info on my unknown from lab. I know its a gram + bacillus, facultative, but I cannot nail down the species. I thought is might be B.cereus or B. mycoides? The fact the it is citrate - is throwing me off. Hope you can help! Thanks! glucose + ...

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by fpepe
Sun Jun 14, 2009 1:19 pm
 
Forum: Microbiology
Topic: Help w/ unknown
Replies: 0
Views: 131

Re: Unknown Bacteris Identification

Encourage you to do you own work but will offer that bacteria are facultative anaerobes - not facultative aerobes.

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by JorgeLobo
Wed May 13, 2009 1:00 am
 
Forum: Microbiology
Topic: Unknown Bacteris Identification
Replies: 4
Views: 767

my unknown

... idea what it is because we thought it could be S. aureus or eidermis but we know it's not. gram positive cocci catalase positive alpha hemolysis facultative anaerobe mannitol fermenter whitish Nothing seemed to match all of these.

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by x3chibi
Thu Apr 30, 2009 6:57 pm
 
Forum: Microbiology
Topic: my unknown
Replies: 2
Views: 377
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