By J.R. Baker (ed.), R. Muller (ed.)

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The greatest dissimilarity between zymodemes was about 4% in the dendrogram, although they spread along several branches within cluster 6. Populations from Kenya and Zambia were included in the 19 zymodemes, the majority originating from animals or tsetse. Most Kenyan populations came from the coastal areas. Two populations in 2106 were, however, isolated in the Lambwe Valley, while those in 229 came from Sindo nearby; Otieno and Darji (1 985) also recorded four isolates of 229, corresponding to their zymodeme 4, from tsetse in the Lambwe Valley.

1980) are included in this strain group; their dendrogram revealed a marked degree of separation between these zymodemes and those now placed in kiboko (see Section IV B 3). More recently, Gibson et a f . (1985) placed a ZI 1 isolate (J lo), on the evidence of its kDNA maxi-circle polymorphisms, into kiboko. This isolate, however, differed in possessing an extra, unique, restriction site, which may support its removal from kiboko into kakumbi. Since the mammalian hosts in kakumbi were all wild animals, it may be that it is an East African form of T.

R. RICKMAN A N D D. MEHLITZ This hypothesis is, of course, speculative, but it is interesting to pursue the view further by considering the details. A. EAST AFRICA Although the majority of populations in busoga were from the Lake Victoria region, others came from as far afield as Zambia, Ethiopia and West Africa. In the cladogram, a tendency existed for those zymodemes with the highest patristic distances (PDs) to be linked with Zambia; this was especially true for those in set 10. Generally, PDs were relatively low as compared with the other East African strain groups.

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