DR GREEN'S CASE. 249 



around us numbers of zebras, buffaloes, pigs, pallahs and other antelopes, 

 feeding quietly in the very habitat of the tsetse, yet as undisturbed by its 

 bite as oxen are when they first receive the fatal poison. Ttiere is not so 

 much difference in the natures of the horse and zebra, the buffalo and ox, 

 the sheep and antelope, as to afford any satisfactory explanation of this 

 phenomenon. Is a man not as much a domestic animal as a dog ? The 

 curious feature in the case, that dogs perish though fed on milk, whereas 

 the calves escape so long as they continue sucking, made us imagine that 

 the mischief might be produced by some plant in the locality, and not 

 by 'tsetse;' but Major Vardon, of the Madras army, settled that point 

 by riding a horse up a small hill infested by the insect without allowing 

 him to graze ; and though he only remained long enough to take a view of 

 the country, and catch some specimens of tsetse on the animal, in ten days 

 afterwards the horse was dead. The well-known disgust which the tsetse 

 shows to animal excreta, as exhibited when a village is placed in its habitat, 

 has been observed and turned to account by some of the doctors. They 

 mix droppings of animals with human milk and some medicines together, 

 and smear the animals that are about to pass through a tsetse district ; 

 but this, though it proves a preventive at the time, is not permanent. 

 There is no cure yet known for the disease. A careless herdsman, allowing 

 a large number of cattle to stray into a tsetse district, loses all but the 

 calves ; and Sebituani once lost nearly the entire cattle of his tribe very 

 many thousands by its influence. Inoculation does not ensure immunity, 

 as animals which have been slightly bitten in one year may perish by a 

 greater number of bites in the next ; but it is probable, that with the 

 increase of guns, the game will perish, as has happened in the south, and 

 the tsetse, deprived of food, may become extinct" simultaneously with the 

 larger animals." 



III. 



The following case from ' The Lancet ' is given by the author 

 as an appendix to the Nemocera. 



" On Filamentous (Entozoon) Worms in the Living Human Body. 

 By JONATHAN GREEN, M.D. 



" In the months of May and June, 1843, were published in ' The 

 Lancet' two papers of mine on ' Entozoon Worms inhabiting the Living 

 Body.' These papers, I believe, occasioned doubts in the minds of some 

 professional gentlemen, amounting more or less to a want of credence in 

 the facts stated therein. This I in some degree anticipated, as such 

 cases are extremely rare in this country, so much so that most prac- 

 titioners pass through professional life without ever having seen a case 

 of entozoon worms inhabiting the tissues of the human body, and it is the 

 only case of the kind that I ever saw. In one of those papers I promised 

 that if I was ever enabled to throw more light on this condition of 

 disease, I should, through your pages, avail myself of the opportunity of 

 doing so. 



