ON THE INFLUENCE OF METEOROLOGICAL CONDITIONS ON THE DEVELOPMENT OF TRYPANOSOMA RHODESIENSE IN GLOSSINA MORSITANS

A. Kinghorn, W. Yorke
1912 BMJ (Clinical Research Edition)  
OCT. 5, 1912.] METEOROLOGICAL CONDITIONS AND TRYPANOSOMA RHODESIENSE. TUEDUT L 83S lower fragment rotated througlh about 40 degrees and secpured in position by means of a plate and screws. The arm was put up supinated and kept in splints for a mon,th, and the result at the date of writing has quite justified tho procedure adopted. Supination can now be easily accomplished, and though the movement is somewhat cramped, it should imnprove greatly as the muscles strengthen andl adlhesions still
more » ... dlhesions still furtlher disappear. Massage, passive and active movements, are being continued, together witlh such exercises as screw-driving, digging in the garden, and piano playing. It is probable that 'the right arm will be treated in due course, When, in view of the experience gained in operating on the' left, the'time of treatment will be considerably shiortened, the' first and fourth operations will be done together, the third and fifth to.gether and the second only done at the last if the result demtands it. One lesson to be learnt is to do too much', rather than'to6 little, since the parts'contract up, just as in ordinary joint excisions. (Fifth Interim ReWrM of the Lnangwa Sleeping S&ielness -Commission of'the British South Africa Company.),v, IN a former reportl' attention was drawn to certain points whliclh seemiled to ihdicate that meteorological conditions in the Luangw-a Valley lhad a considerable influenice on the development of' Trypanosomra r7odesiense in Glossina ivzorsitans. As, however, tlle experiments were fewv in number, and were 6atried ouLt during only a, single dry and vet season, no definite conclusions could be drawn. Since the Commission establislhed its lhead quarters ou the Congo-Zambesi watershed, evidence has accumulated whicll indicates, decisivelv that suclh conditions, more particularly the temperature, exert a very pronounced influence on the development of the trypanosome in Glossina ?morsitans. At Nawalia eight transmission experiments were madefour with laboratory-bred and four with " -wild " Glossina ,morsitans. At Ngoa five eXp3rimnents have been carried out to date-four-With "wild" and one with bred flies. It is unfortunate that the bred flies arc not m-ore nudmerous, btut owing to the. low temperature the majority of the flies did not enmerge from the puLparia, and many of those wvhich did were miialformed and quickly died. In all the experiments in wlhiclh "wild " flies were used, hovever, the possibility that they were already infected with thle trypanosome was excluded by first feeding them on healthy monkeys.
doi:10.1136/bmj.2.2701.835 fatcat:lkykew6o5za7fdnjz3k6mixt3q