?A 2 



Approval of Sheep-Dips. 



[march, 



If the psoroptic form should spread over the body, the patient 

 may waste away and become greatly reduced in condition. 

 In cases of this kind, however, it will often be found that the 

 wasting is due to some serious internal trouble such as tuber- 

 culosis, which reduces the animal's natural power of resistance 

 to the less serious disease. 



It has not infrequently been observed that cows appear 

 to become cured spontaneously when turned out to grass in 

 the spring. This usually means, however, that under open-air 

 conditions the parasites do not increase at the same rate, 

 hence the active symptoms are merely less marked. In the 

 autumn, when the animals are again stabled, the acari (parasites) 

 which have persisted resume their activity, and this may lead to 

 the erroneous belief that re-infection has taken place. 



Prevention. — The affected patches on the animal's skin 

 should be softened by washing with soap and warm water. 

 After this has been done, the parts should be dressed with one 

 of the common mange dressings, such as spirit of tar, oil, and 

 sulphur. The dressings should be applied twice or even three 

 times at intervals of ten days. For the serious and rebellious 

 cases above mentioned veterinary advice should be sought. 



The litter from an infected animal should be removed 

 each time after dressing, and the flooring and wood or other 

 fittings should be well sprayed with a 5 per cent, solution of 

 carbolic acid in water. 



Under the Sheep Scab Orders made on January 27th last by 

 the Board of Agriculture and Fisheries the use of sheep-dips 

 approved by the Board is required. 

 Approval of Th e Sheep Scab Order for 1905 contains 

 three prescriptions* for dips which have 

 been approved after experimental trials. The Board are pre- 

 pared to receive applications from manufacturers of any sheep 

 dip for their approval of its use for sheep scab, and have arranged 

 that any analytical examination necessary to verify the stated 

 composition of the dips submitted to them shall be made at the 

 Government Laboratory. 



Forms of application for the approval of a dip may be 



* Journal, Vol. XI., No. u, Feb., 1905, p. 662. 



