Final answer:
In the primary stage of syphilis, a client is most likely to have genital chancres, which are firm, round, and typically painless sores at the site of bacterial entry.
Step-by-step explanation:
A client diagnosed as being in the primary stage of syphilis would most likely present with genital chancres. These are the typical manifestations of primary syphilis. A chancre is a firm, round, and usually painless ulcer that appears at the location where the Treponema pallidum bacteria entered the body. The chancre develops 10 to 90 days after transmission and can last 3 to 6 weeks. Other stages of syphilis, such as secondary and tertiary, have different clinical presentations, including rashes, systemic involvement such as cardiovascular or neurological symptoms, and the formation of gummas.