Image 22. A visitor to South Africa noted an "insect bite" like lesion on the upper posterior chest wall, a day after lying in the grass in a game park. It was not itchy or particularly tender and had a 0.5 cm dark centre, without a breathing hole, when seen here 10 days later. There was no fever but there was a mild headache and a tender axilla (2 cm. lymphnode) on the same side. The diagnosis was:
