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A chancre (/ ˈ ʃ æ ŋ k ər / SHANG-kər) [1] is a painless genital ulcer most commonly formed during the primary stage of syphilis. [2] This infectious lesion forms around 21 days after the initial exposure to Treponema pallidum , the gram-negative spirochaete bacterium causing syphilis, but can range from 10 to 90 days. [ 2 ]
Chancre is a lesion typical of infection with the bacterium that causes syphilis, Treponema pallidum; Chancroid is a lesion typical of infection with the bacterium Haemophilus ducreyi; Chancres are typically painless, whereas chancroid are typically painful
Latent syphilis is defined as having serologic proof of infection without symptoms of disease. [19] It develops after secondary syphilis and is divided into early latent and late latent stages. [27] Early latent syphilis is defined by the World Health Organization as less than 2 years after original infection. [27]
Ringworm. What it looks like: Ringworm is a common skin infection caused by a fungus. It gets its name from its circular rash, which is often red, swollen, and cracked. Other symptoms to note ...
Athlete's foot. Athlete's foot is a fungal infection that looks like cracked, scaly, and peeling skin found between the toes, most commonly the fourth and fifth toes, although it can spread to ...
Genital herpes ulcers. A genital ulcer is an open sore located on the genital area, which includes the vulva, penis, perianal region, or anus. Genital ulcers are most commonly caused by infectious agents (fungal infections, secondary bacterial infections, or sexually transmitted infections such as genital herpes, syphilis or chancroid).
Haemophilus ducreyi is a Gram-negative coccobacillus, and has a shape between a spherical coccus [6] and a rod-shaped bacterium. [1] This species of bacterium has pili, fine and tangled appendages composed predominantly of protein, that allow bacteria to attach to surfaces, including those of cells.
Some infants with congenital syphilis have symptoms at birth, but many develop symptoms later. Symptoms may include rash, fever, large liver and spleen, and skeletal abnormalities. [17] Newborns will typically not develop a primary syphilitic chancre but may present with signs of secondary syphilis (i.e. generalized body rash).