Eradication of Bovine Tuberculosis
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of all mammals, I still believe that when man steps in and interferes. with Nature that some harm must ensue, and that it is only a matter of time before research work will prove this still more rlefinitely.
ERADICA nON OF BOVINE TUBERCULOSIS. By HENRY GRAY, M.R.e.V .s., Earl's Court, London, S . W. SINCE I published an article on this subject in the Veterinary Record (May 28th), there has come into my hands literature issued by The Free Importation of Canadian Cattle Association of Great Britain, whose Hon. Secretary is Sir John Lindsay, K.B.E. , J.P., D.L., Town Clerk, City Chambers, Glasgow. The 12-page pamphlet on the" Hidden Perils of Milk" gives a fair resume of " The Case for the Free Importation of Non-Tubercular Canadian Cows and Heifers into Great Britain in the Interests of Public Health," etc., and" Are British Dairy Herds Fifty per cent. TuberCl"llar ? " This a<;sociation is composed mainly of representatives of English and Scottish Boroughs or Burghs, Chambers of Commerce, Co-operative Societies, Meat Traders' and Cow Keepers' Associations, the Scottish Chamber of Agriculture, etc. It gives a mass of facts and logical reasons for the introduction of non-tuberculous dairy stock from Canada into this country . . A Memorandum by the Town Clerk of the Corporation of Glasgow of the correspondence that has taken place between himself and the Ministry of Agriculture on the Canadian Cattle Trade, a "Note of Procee~ings at a Deputation from the Canadian Cattle Association," received by The Right Hon. Walter Guiness, D.S.O., M.P. , at the House of Commons on December Rth, 1925, and a "Minute of Proceedings" at Meeting of Local Authorities and other bodies held in the Caxton Hall, Westminster, London, on March 29th, 1926, are issued and should be in the hands of every veterinary surgeon on the register, 95 per cent. of whom do not know what has been going on concerning this question, which concerns the profession as a whole as much as it does any other body of the public. Although Canadian dairy cattle may be found free of tuberculosis when they arrived in this country, it does not follow they would remain so after coming in contact'with our heavily tainted stock or placed in. infected cowsheds. If this country was going to adopt radical eradication of the disease as soon as a district was freed of it there would remain a good case for the introduction of " clean" . dairy stock to· replace the losses entailed by the destruction of reactors.
.350
The Veterinary Journal
If we were to adopt the system being adopted by the United States Department of Agriculture and which has been adopted on a smaller scale by the island of Guernsey, there would be a very great demand for the .production of clean dairy stock in this country which could be supplemented with clean dairy stock from Canada . or elsewhere, where no a.cute infectious plagues existed. Again there would also be a greater demand from overseas or abroad for our stock, which -could be bought with greater confidence. Furthermore, all other countries would soon follow in our wake since seeing if they did not -our markets for their butter, cheese and dead meat would be closed against them. Finally, by freeing our livestock from this fell disease, there would be no necessity to destroy the nutrient properties of milk by boiling, sterilization or pasteurization and its incidence in the buman race would fall tremendously as shown by the statistics issued by Dr. Bishop, M.O.H. , for the island of Guernsey. Prevention is better and, in the long mn, cheaper, than tinkering with this malady.
Clinical lirllclts GRASS DISEASE IN HORSES. GRASS FEVER, ETC. By WM. S. LORNIE, M .e ., M .R.e.V .s .• P erth .
AT this time of the year grass disease is usually prevalent in certain, ,districts of Scotland, and although most of the general symptoms are well known to practitioners, occasionally one meets with an obscure .type. I am quoting a few cases met with a few seasons ago, so that "they may he placed on record. CASE No.1. SUBJECT.-·A Four-year-old Pony. When observed first, this :animal appeared debilitated, with a marked tucked-up condition of the abdomen. Pulse 60; temperature 101° F. Borborigmus present, bnt the freces were passed in small quantity. The muscles of the back were hard and tense, with a semi-tetanised appearance. The animal ·sweated in patches, on the 90dy, under the forearm, and particularly ul).der the mane and tail. The com manger was observed to be half iull of chewed hay and grass, and on giving the animal grass or liar to .eat·, it chewed it a long time, ultimately quidding it into the manger. This accounted for the material found there. The patient was evidently unable to swallow properly. gas was present in the o:sophagus, the btter showing typical reverse peristalsis. When the animal did