Characteristic of primary chancre:(1988)
Ans: a (Painless punched out ulcer)Ref: Ananthanarayan Micro, 7th ed, p. 379 & 6th ed, p. 350, Harrison, 16thed, p. 979 & 15th ed, p. 1048
Painless punched out ulcer
Painless ulcer with over hanging edges
Painless ulcer with irregular raised edges
Painful punched out ulcer
Spirochetes