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taking it, still it is curable in 90 per cent, of cases. The treat- 

 ment, however, is tedious as each bird must be caught and 

 handled a number of times, and the disease frequently gets out of 

 hand and in spite of every effort appears again and again among 

 the segregated healthy birds. 



It is therefore a pleasure to announce that a new* cure and 

 preventive has been found which not alone reduces the number 

 of times the affected birds must be handled to a minimum, but 

 the application of which to the healthy birds acts as a vaccine 

 which immunizes them for at least a year and perhaps for life. 

 The method is simple but requires some care in the preparation 

 of the vaccine. The latter is made by scraping the crusts off the 

 tumors and cores which appear on the comb, wattles and skin of 

 the head. These crusts are carefully weighed, then ground in a 

 mortar with a sterile salt solution, strained through cheese cloth, 

 and the resulting fluid is then heated for an hour over a water 

 bath, at a temperature of 55° C. and the vaccine is ready for use. 

 With a hypodermic syringe, a dose of 2 cc. is injected under the 

 skin of the abdomen near the thigh where the skin is free of 

 feathers. This treatment has no detrimental effect upon the 

 healthy birds, but actually prevents them from becoming affected 

 even when' left among the sick ones. The latter should be treated 

 as usual at the same time they are injected, that is by painting 

 the tumors and sores from which the crusts have first been 

 removed with tincture of iodine. The number of affected birds 

 cured is at least twice as large as without vaccination. 



In order to introduce this treatment here it is desired that 

 owners of birds suffering from sore head, roup or chicken pox 

 at once communicate with this office and at the same time for- 

 ward scrapings from which to prepare the vaccine. Only crusts 

 taken from the comb, wattles and head should be used, not the 

 exudate from the nostrils nor the diphtheritic membranes from 

 the mouth. The quantity required is about a teaspoonful but 

 less can be used (minimum 15 grains). Place the crusts in a 

 wide-mouth bottle, seal and forward in a mailing case by special 

 delivery to the undersigned. If possible the vaccine will be sent 

 by return mail. When removing the crusts wipe off the blood 

 with al)sorbcnt cotton and paint the sores with tincture of iodine. 



Riespectfully submitted, 



Victor A. Norcaakd, 

 'i'erritorial Veterinarian. 



The original work on controllin<j ('lii('l<on ]>ox or soro head in chickona 

 by vaccination was done liy Dr.. I. R. Heach, of the TI. S. Department of 

 Af^rieviltiire, an<l Dr. Warin<^, of flie California Agricultural I^xpcrinient 

 Station.— V. A. N. 



