Microbiology help! Identify this \"unknown species\", given the information and

Question

Microbiology help!

Identify this "unknown species", given the information and pictures below!

Information:

Pictures:

Gram stain:

So because the pictures above show positive gram stain, it can only be one of the six positive gram stains.

Spore stain:

I believe these showns are rods but I am not 100% sure. If anyone could help me eliminate options then I would appreciate it!

Thanks!

HERE'S OUR LIST OF POSSIBLE "UNKNOWN" SPECIES (Your "unknown" is one of thesel: Bacillus cereus Enterobacter aerogenes Micrococcus luteus Pseudomonas aeruginosa Staphylothermus marinus Clostridium difficile Enterococcus faecalis Moraxella catarrhalis Rhodospirillum rubrum Ursus maritimus Corynebacterium xerosis Lactobacillus casei Mycoplasma mycoides Serratia marcescens

Explanation / Answer

The cells showing the pictures are definitely rod-shaped which can be clearly seen. In the spore staining malachite green is used as the primary stain, gives a green color to spore-containing bacteria and safranin is used as a counterstain which gives pink color to spore negative bacteria.

So from the given picture, we can conclude that the bacteria are Gram-positive, Rod-shaped and spore negative.

So from the given option Corynebacterium xerosis

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