chancre 5.a cartilage-hard consistency on palpation 6.Painless and highly infective 7.If left untreated,the chancre heals spontaneously within 3 to 8 weeks.This is the end of the primary stage.But the organism continues to multiply in the body chancre 5. a cartilage-hard consistency on palpation 6. Painless and highly infective 7. If left untreated, the chancre heals spontaneously within 3 to 8 weeks. This is the end of the primary stage. But the organism continues to multiply in the body