ANIMAL TRYPANOSOMIASIS IN THE LADO (WESTERN MONGALLA) AND NOTES ON TSETSE ELY TRAPS AND ON AN ALLEGED IMMUNE BREED OF CATTLE IN SOUTHERN KORDOFAN BV ANDREW BAl.FOUR, C.M.G., M.D., B.Sc, F.R.C.P.E., D.P.H., DIRIX'IUR. WELLCOME TROPICAL RESFARCH LABORATo Rl F.5, GORDON COLLEGE, KHAHTOLM {Received ior piiblicithon 24 Febnuuy, 19 [3) Plates IX, X When, some years ago, the Sudan Goxcrnnicnt took over the region known as the Lado Enclave, which now stretches from the sixth parallel of North Latitude southward to Lake Albert and extends from the Bahr-el-Jebel on the east some 120 miles inland to the frontier of the Belgian Congo, it found itself in possession of an area infected with sleeping sickness. Since that time a great deal has been done b)- Captain Thompson and Lieut. Ranken, R.A.M.C., in studying this disease and to cornbat it both prophylactically and therapeutically, but, so far, little attention has been paid to the forms of animal trypanosomiasis present in this part of Africa.

The following" short and, of necessity, incomplete paper is intended as a preliminary contribution to the subject, and also contains notes on certain other matters intimately associated either with human or animal trypanosomiasis.

L In May of last year I visited the sleeping sickness camp at Yei. m what is now known as Western Mongalla, the name Lado having been abandoned, as the old Belgian station of Lado on the Nile has disappeared. On the way thither, and when at Yei, I had a few opportunities of examining the blood of transport and other domestic animals. At Loka, a post intermediate between Rejaf and Yei, I found mules infected with trypanosomiasis, and at Yei found a donkey which had been infected when in the fly region of the Moru district further to the north and west.