August 8, 2005 at 4:55 pm #1619JoashtParticipant
Hi kinda new here, intro’ed myself in the off-topic section, for those who wanna read a lil about me 🙂
Anyway, I have this report due this thursday. We had a two-week long lab experiment with bacteria, and at the end of it, we have to write a report (as usual). Now the thing is, my demonstrator is kinda expecting a rather impossible task. Using only the info I’m giving below, I have to actually identify the two strains of bacteria.
I’m still a first year 2nd sem student, so this is kinda, well, really hard for me especially without personal help and without the correct links. Did quite abit of browsing, didn’t come across anything online…hope you guys can help. Btw here is the info:
Microorganism Sample A Sample B
Motility Positive Positive
Haemolysis α-haemolysis β-haemolysis
Gram stain Positive Negative
Spores Positive Negative
Capsule Positive Negative
Catalase Positive Positive
For sample A, the closest I could find so far was B.subtilis, but it its b-hemolytic, not a-hemolytic.
Any help, ideas, or links will be greatly appreciated. Sorry if this might be a little too much, but….well I gotta get this done with (for the record, most of my classmates have already given up and decided to simply go with general statements on the bacteria, so there goes “depending on my peers”…)
Hmm table didn’t turn out right……anyway its a three-column table, with “microorganism” being the 1st column, and sample A and B being the other two columns.
September 7, 2005 at 11:13 pm #29300PaulineRhookParticipant
with a couple of the identifying characteristics that you have suggested, Streptococcus pneumoniae is Alpha Haemolytic and capsule forming. It is responsible for infections such as Meningitis, Pneumonia, Sinusitis to name a few.
Hope this helps
September 13, 2005 at 11:09 pm #29485LukaszosParticipant
I’m still thinking about microorganizm A – and I really don’t know what it is – S. pneumonia doesn’t match because of spores (negativ)
Maybe some of Bacillus are able to Alpha – Haemolitic
When you solve this problem please answer
Sorry for my English
March 17, 2009 at 11:47 pm #89748908margaritaParticipant
i have the same clues that you had for my micro, what was your answer?
March 18, 2009 at 11:02 am #89755SepalsParticipant
Are they rod or cocci? Also how would you describe their clustering? I can’t help as I’m at work, but when I get home I’ll do a bit of research and see what comes up.
March 23, 2009 at 11:01 am #89827SepalsParticipant
I think sample B might be Bacillus as this produces B haemolysis, although it isn’t motile.
I think you need further testing to identify them for sure.
Btw I assumed they are rods as you said they are motile, sure about that? You haven’t mentioned what kind of motility either….
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