Final answer:
Based on the results of indole positive, citrate negative, H₂S positive, urea negative, deaminase negative, lysine positive, arginine positive, ornithine negative, motility positive, oxidase negative, and mannitol negative, the bacteria is identified as Salmonella typhi.
Step-by-step explanation:
The question pertains to the identification of a bacteria based on a series of biochemical tests. Given the characteristics of indole positive, citrate negative, H₂S positive, urea negative, deaminase negative, lysine positive, arginine positive, ornithine negative, motility positive, oxidase negative, and mannitol negative, the bacteria can be identified. Considering the results of the tests and comparing them to known bacteria profiles, we can eliminate possibilities. Staphylococcus aureus is oxidase-positive, ferments mannitol, and is typically coagulase-positive. Escherichia coli is a bacterium that is generally indole positive, lysine and arginine variable, and ornithine negative, but it is mannitol positive, which does not match the presented profile. Salmonella typhi fits the given profile as it is indole negative, citrate negative (or variable), H₂S positive, urea negative, deaminase negative, lysine positive, arginine positive, ornithine negative, motility positive, oxidase negative, and does not ferment mannitol.
Therefore, the bacteria in question is most likely Salmonella typhi.