What steps should I take to identify this mysterious bacteria in my lab?

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Discussion Overview

The discussion revolves around the identification of a mysterious bacteria isolated in a chemistry lab, specifically an endophyte that exhibits characteristics of both bacteria and fungi. The participant is seeking guidance on how to proceed with the identification given the limited information and resources available.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • The participant has a gram-positive cocci but lacks further identifying information due to the absence of a known source or organism.
  • One participant suggests using an API test for identification, but another counters that API is typically for gram-negative rods, not gram-positive cocci.
  • The participant considers using 16S sequencing and PCR for identification, although they express uncertainty about their knowledge and the capabilities of their current lab.
  • Another participant questions why further identification could not be made based on the gram stain alone, suggesting that size and shape could lead to more specific identification.
  • The participant notes that the bacteria exhibits a fungal form of growth and has received permission to use another lab for DNA extraction and PCR, with hopes of identifying the organism within a week to ten days.
  • The participant describes the growth characteristics, noting low counts and a fungal appearance when cultured, as well as positive results on specific agars.

Areas of Agreement / Disagreement

Participants express differing views on the appropriate methods for identifying the bacteria, with no consensus on the best approach given the unique characteristics of the sample and the limitations of the current lab environment.

Contextual Notes

The discussion highlights limitations in available resources and knowledge, particularly regarding the identification of gram-positive cocci and the use of molecular techniques like PCR in a chemistry lab setting.

Pakbabydoll
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ok so I work in a chemistry lab but I am a microbiology major. Our lab works with endophytes. We have a positive result for one of them and I have to identify this thing by April. This task seems impossible to me. They did not keep track of where this sample came from or even which organism it was isolated from. All they have is that it is a white bacteria (like that's helpful). I did a gram stain and it is a gram positive cocci ( not a small category). Since it is a chemistry lab I am very limited in what tests I can actually do. I am only an undergrad and I have no idea where to go from here. My graduate student is also a chemistry person. So no help there.

Please HELP!
 
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You are a microbiology major and you do not know how to identify a microorganism? That is very surprising. I don't know the English name for the test, but there is a series of tests that are done by growing the microorganism in test tubes on different media that helps in the identifications of microorganisms. The color of the tubes after incubation is dependent on the biochemistry and is used for the classification.

I looked it up and apparently it is called an API test, you should look up the information on how to formulate the media for the tests yourself.
 
As far as I know API is used only for gram negative rods, mine is a gram positive cocci. So I can't use API. We had to find unknowns in our microbiology class but we were given a list of 20 some bacteria so I had a strategy. Here there is no list, I don't have any information except that its a Gram positive cocci. I think I might end up having to use 16S sequence and PCR. However I don't know much about them not to mention our lab does not have the capability to do that since we are chemistry I'll have to ask a biology lab to help me with that.. Using phenotype as a way to identifying something that I have no idea. Its a very vague task?
 
So you couldn't conclude further based on your gram stain? Just that it's a gram positive cocci? That's odd, judging from the size and shape you should be able to break it down even further... maybe even make a identification such as would be the case if it were pneumococcus.

There are various systems however like the API system for specifically identifying gram-positive cocci. They hold similar ratings.
 
Well this bacteria is a little different. Its def a bacteria but it exhibits fungal form of growth. Its an endophyte so a lot is not known about them specially since our sample is from somewhere very unusual. I got the permission to use another lab and I extracted the DNA Friday, I am planning on doing the PCR Monday and so hopefully we'll know what it is in 7-10 days! I don't know weather I want it to be something known or unknown. Of course I mean statistically its probably known but we do get our samples from an unusual place so it might be unknown.
 
o when I say fungal form of growth I mean when we grow it over night in TSB first there is very low count and 2nd it looks fungal in strings and all, and I put it on BA to check for hemolysis but it looked like yeast on BA. I also got a positive for MSA and MYP agars.
 

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