A nonfermenter recovered from an eye wound is oxidase positive, motile with polar monotrichous flagella, and grows at 42C. To which DNA homology group should this organism be classified?

The organism described in the question is classified within the DNA homology group of Pseudomonas stutzeri due to several key characteristics. Pseudomonas stutzeri is known for being a nonfermenter that is oxidase positive, which means it produces the enzyme cytochrome c oxidase, facilitating the identification process in the laboratory.

The motility aspect, indicated by the presence of polar monotrichous flagella, is another strong characteristic of Pseudomonas stutzeri. This trait allows the bacterium to exhibit motility, which is an important aspect of its ecological interactions and pathogenic potential.

Furthermore, the ability to grow at elevated temperatures, specifically at 42C, is characteristic of Pseudomonas stutzeri, as it thrives in various environmental conditions, including those that may be hostile to other species. While other members of the Pseudomonas genus have overlapping characteristics, the combination of these features — being a nonfermenter, oxidase positive, motile, and capable of growth at elevated temperatures — uniquely fits Pseudomonas stutzeri.

In contrast, the other options represent variations of the Pseudomonas genus that do not share the same combination of traits, which