WORMS 521 



by adult females, which m turn become bacillus carriers, 

 likely to transmit the disease to their offspring the following 

 season, as indicated m the discussion on page 94. All 

 eggs purchased from flocks where it is not definitely known 

 that no outbreak of anything similar to white diarrhea has 

 occurred for several years should be hatched in a separate 

 incubator away from eggs that are known to be from luiin- 

 fected stock. Upon hatching these chicks should be brooded 

 by themselves, confined to a run that can be easily disin- 

 fected should the trouble put in an appearance, and so 

 isolated that other stock cannot come in contact with them. 



One reason why incubator chicks appear to be more 

 susceptible to white diarrhea than hen-hatched chicks is 

 probably found in the fact that they are hatched in much 

 larger numbers in incubators than under a hen, and a single 

 chick hatched from an infected egg may be the means of 

 infecting a large number of its flock mates, the organisms 

 being distributed about tlirough the incubator by means 

 of the droppings from this chick. If the interior of the 

 incubator is not darkened, the chicks are very likely to pick 

 at the droppings as they begin to get hungry. For this 

 reason, it is usually good practice to keep the incubator 

 darkened until the chicks are taken to the brooder. They 

 should be kept isolated for a period of at least three weeks, 

 after which time one may be reasonably sure that no infection 

 has occurred. 



Where the chicks do show symptoms sunilar to those 

 described above, every chick in the flock should be promptly 

 biu'ned and the entire equipment and run where they were 

 kept, carefully and thoroughly disinfected. The litter, all 

 droppings, and the fringe on the hover should be burned. 

 One should also be careful to disinfect the hands and shoes 

 after having handled the chicks, or been on the ground where 

 infected birds have been. 



In disinfecting the run it should be sowed with hydrated 

 lime at the rate of 500 pounds to the acre, plowed and sowed 

 to some crop. The corners that the plow does not reach 

 should be carefully spaded by hand. 



Worms. — From the practical stand-point it is hardly 

 lU'cessarv to distingTiish between the different kinds of 



