380 Veterinary Medicine. 



Among the resultant symptoms are loss of appetite, a tendency 

 to leave the herd, emaciation, anaemia, bloodless eye, absence of 

 subcutaneous fat (paper skin), shedding of the wool which is 

 dry and with little yolk, excessive thirst, and depraved appetite, 

 shown in a desire to eat earth. 



In the advanced stages the cough becomes very harrassing and 

 death may take place from suffocation. 



Diagnosis is based nlainly on the known prevalence of the 

 dis'ease on the pasture or water-shed, or the introduction of 

 strange sheep affected with cough, on the slow advent and pro- 

 gress of the malady, on the attack of a large number at a time, 

 especially lambs, irrespective of weather vicissitudes, on the ha- 

 bitual absence of hyperthermia, on the frequency and paroxysmal 

 character of the cough, on the wheezing breathing, and above all 

 on the abundant expectoration of a frothy mucus containing the 

 mature and embryo worms. 



Prevention. Two main indications must be pursued : ist. 

 To prevent the worms from gaining access to the system ; and 

 2nd. To bring the .sheep into a condition unfavorable to the sur- 

 vival and destructive work of the worm. Under the first head 

 may be noted : 



Keep lambs from pastures previously depastured by infested 

 sheep, especially if these have been overstocked, or are naturally 

 damp, springy, marshy, dense and undrained, irrigated, or if any 

 QonXaSr^. ponds , basins, lakes, or are watered by streams running 

 through infested lands higher up. 



If watered from a flowing stream fence out all but the part 

 where they drink and where there is a decided current. 



Better to water from deep cemented wells receiving no surface 

 drainage nor leaching. 



I,ambs should be kept from infested pastures especially in wet 

 seasons, after showers, and until after the morning dews have 

 evaporated. 



No less should they be kept from infested pastures in dry sea- 

 sons. Sheep may be safely pastured on lands infested with the 

 lung worms of horses and cattle. 



If the nursing ewes are infested they may be soiled in sheds or 

 bare yards for four months until the lambs can be weaned, and 

 then the lambs can be turned on a newly seeded pasture apart 



