86 WORM PARASITES. 



examination of fowls I have found these worms 

 chiefly located in the duodenum. A common habit 

 seems to be for the worms to roll themselves together 

 into a ball. I have counted as many as fifteen tightly 

 knotted together. The worms form a plug, causing 

 obstruction and thus death. 



They develop direct from the eggs, which are eaten 

 by the fowls. 



As a rule, these worms are very slow working evil 

 results, but if allowed free play in their host they may 

 often cause sickness and even death. 



Symptoms of White Intestinal Worms. 



As a rule, infested birds become ravenous, yet at 

 the same time they seem to lose condition. The 

 feathers become erect and lose their sheen. The comb 

 becomes pale in colour, the birds yawn, and when the 

 parasite is present in large numbers diarrhoea sets in. 

 The worms may be seen in the droppings, and unless 

 the patients are kept isolated they are eaten at once 

 by the other fowls in the run. 



Prevention and Treatment. 



Isolation of infested subjects is just as essential as 

 in ' Gapes.' When penned separately, the bird 

 should be given soft food only. For some time 

 before being dosed, no food should be given at all. 



Santonin is the best vermifuge for Heterakis 

 worms. It is best employed in the form of a pill — 

 three grains of santonin to each pill ; this can be 



