Table 1. Characteristics of M. ulcerans isolates used.

M. ulcerans	Origin	Geographical origin	Type of Mycolactone
98-912	Ulcer	China	D
97-1116	Plaque	Benin	A/B
1615	Ulcer	Malaysia	A/B
94-1331	nd	Papua New Guinea	A/B
94-1327	Ulcer	Australia	C
5114	Ulcer	Mexico	-
00-1441	Ulcer	Benin	A/B
94-1324	Aquatic insect	Australia	C
03-216	Ulcer	Benin	A/B

nd, not determined; -, Mycolactone negative.