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Feyza Forum Guru Topics: 51 Posts: 1413	Apr 12, 2007 - 6:05 AM       #1 Are the non obligate aerobes also facultative anaerobs too like corynebacterium listeria neisseria...aerobs and bc they are not obligate ones... can they switch??? maybe this is an unimportant detail for the exam
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Feyza Forum Guru Topics: 51 Posts: 1413	Apr 12, 2007 - 7:45 PM       #2 no replies?? seems everybody's confused
asherif Forum Newbie Topics: 0 Posts: 46	Apr 13, 2007 - 1:43 AM       #3 obligate aerobes : need oxygen and can't live without it (can't live in anaerobic conditions) microaerophilic : requires low oxygen concentration for growth facultative anaerobes : live as aerobes (use oxygen) and in can survive as anaerobes in anaerobic conditions when there is not oxygen obligate anaerobes : can live only in anaerobic conditions and the presence of oxygen actually kill them (oxygen is toxic for them). feel free to correct me
Feyza Forum Guru Topics: 51 Posts: 1413	Apr 13, 2007 - 7:18 AM       #4 yeaa Asherif Im ok with this info...what I wanna be sure about is ...can all aerobs switch to being a fac anaerob ? cuz in the books only ebterobactericea,vibriocea and pasteurellacea r expressed to be fac anaerobs and nothings mentioned on gr (+) and (-) aerobs except for the obligate ones ( pseudomonas ,mycobacterium , nocardia and bacillus ) thanx for your time asherif
Feyza Forum Guru Topics: 51 Posts: 1413	Apr 13, 2007 - 7:21 AM       #5 I mean what I want a YES or NO to is : can normal non obligate aerobes switch??? Im a brain worm soooowiiieee
bactitech Forum Newbie Topics: 31 Posts: 606	Apr 16, 2007 - 9:25 PM       #6 Do you mean something like they have a meeting and decide one day to grow under different conditions? Does this make sense to you? Read asherif's explanation again and again. Bugs are what they are. If they only grow anaerobically (strict anaerobe) on Wed. then they will only grow anaerobically on Friday. How they grow is part of their definition. Ps. aeruginosa will not grow anaerobically. We use it as a bug to test our anaerobic chambers to make sure air does not leak into them. We plate half the plate with a Clostridium and the other half with a Ps. aeruginosa. If the Pseudo grows after overnight incubation in the anaerobic chamber we know that something is not right with the atmosphere in the chamber. We look for growth of the Clostridium only. Please define a "non-obligate aerobe." This is not a term used in micro books. There are "obligate aerobes" and "facultative anaerobes" but not "non-obligate aerobes." What "non-obligate aerobe" are you referring to? You are not making a lot of sense. Sorry.
Feyza Forum Guru Topics: 51 Posts: 1413	Apr 16, 2007 - 10:42 PM       #7 Im not referring to anything bacti...Im just trying to understand if an aerob can also grow in anaerob conditions if its not an obligate one like for example corynebacterium...its aerob..has the enzymes...non fermenter..does that mean it can never grow in anaerob conditions?? Im just confused thats all...

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