78 VETERINARY PARASITOLOGY 
The external mucous membranes are anemic. Ascites 
is occasionally seen. 
On making a microscopical examination, hundreds of 
Strongyles may be discovered. 
Prognosis.—Animals badly affected with parasitic 
gastro-enteritis seldom recover unless treated, and even 
then with difficulty. 
Prophylaxis.—The parasites which cause these symp- 
toms must necessarily pass a certain period of their 
existence amid damp surroundings, and they undergo 
certain modifications outside the host. 
All affected pastures should be drained, salted, limed, 
or ploughed. If possible, they should be kept free from 
cattle. Overcrowding must be avoided, and lambs and 
yearlings should be well fed and kept in good condition, 
in order that they may withstand the attacks of 
Strongyles. As preventives, salt and general tonics 
may be given in the food. Lambs must never be placed 
on affected ground after adult sheep, as the latter may 
act as a host and yet be unaffected, and may pass 
the disease on to younger animals, with disastrous 
results. 
Treatment.—Afiected animals should be isolated, and 
the whole herd or flock dosed, as a preventive measure, 
three times, at intervals of three days. 
The following drench is suitable for lambs : 
R Ol. tereb. ae ae we oe Of 
Chloroformi } oa 
Lysol ‘os ~ oe .. 4a mx. 
M. Fiat haust. Sig.: To be given in milk. 
Picrate of potash, up to 5 grains per lamb, is also very 
successful. 
In cattle lysol has proved most useful. As a prelimi- 
nary 4 drachms may be given, either by bottle or 
probang. 
