OCR Text |
Show TO APPLY TUBERCULIN TEST Has No IH Effect Whatever on Healthy Cows and Does No Harm to Those Afflicted. If a tuberculous cow bas a small quantity of tuberculin Introduced be-Death be-Death tbe skin, a temporary fever will result, which can be detected by taking tak-ing tbe temperature of the animal a i healthy animal ahows no such fever. Tuberculin baa no ill effect whatever, what-ever, on healthy animals, and no harmful effect on tuberculoua animals. It docs not. In the amounts used In testing, have any effect on the progress pro-gress of the disease In the animal, nor can It In any way produce the disease. With many herds It bas been used regularly for 10 to 15 years with absolutely ab-solutely no injurious effects. Tbe statements that the test causes abortion abor-tion or other ailments are without foundation. The flow of milk Is not changed to any appreciable extent even In tbe case of tubercular animals. ani-mals. The temperature of cattlo, unlike that of man, varies widely, not only In different animals, but in the same animal ani-mal at different times. The temperature tempera-ture of a cow is usually between 101- Proper Method of Thrusting 8yrings Through the Skin.' 102 degrees F.; that of calves and of fat stock somewhat higher, while old cows and those low In vitality usually show somewhat lower temperatures. By means of a hypodermic syringe, tbe tuberculin Is Injected beneath tbe sltln the most convenient place for injection being Just back or in front of the shoulders. This places the operator out of danger of being kicked. Tha Injection may be mads on the aide toward the operator, or on tbe other side by reaching over the back of the animal. The skin Is lifted up with one band and the needle tbrust through at right angles but parallel to the aide of tbe animal so that the contents of the syringe may be discharged dis-charged underneath tbe skin, but not Into the muscles. The syringe should be provided with a "stop" so that a definite amount of tuberculin and no more 'can be easily Injected, The average of the temperatures before be-fore injection is determined and if the highest temperature after tbe Injection In-jection is 2 degrees F. or more above the average normal, the animal Is generally gen-erally regarded as having given a positive reaction. Usually the rise In temperature of a tubercular animal Is much greater 4 to 6 degrees F. and there Is no question as to the result When the rise Is close to 2 degrees tbe reaction Is classed as doubtful In all casea, and especially In tbe doubtful ones, the Interpretation of tbe records should be made by an experienced person. Some reacting animals show the effects of the tuberculin by shivering, shiver-ing, refusal to eat, etc. In some cases these symptoms are very noticeable, notice-able, Ir others they do not appear at A i Position of Operator When Inserting Needle From Opposite Side of Animal. all In the case of non-reacting animals, ani-mals, no such symptoms are ever noted. Tbe tuberculin test Is not always absolutely correct for a number of reasons, but when applied with Judgment Judg-ment and care. It la correct In at least 85 per cent of the caaes. |