How does the author's description of dogs as "syphilitic"

(Line 19) and humans as "tubercular/masters" (Lines

20-21) contribute to the meaning of the piece?

The author's description of dogs as "syphilitic" and humans as "tubercular/masters" emphasizes how industrialization has taken over the natural scene and brought disease and discomfort with it, which serves to negate the imagination of the modern world as an idyllic wildlife landscape by the author.

Explanation:

The poem Walking Down Park by Nikki Giovanni portrays a speaker who re-imagines the modern world as an idyllic wildlife landscape, an imagination disrupted by the fact that urbanization and industry has brought about an unnatural feeling with it.