INTERNAL PARASITES . 91 



that the worms are iiuhedded in tumefactions in the walls of 

 the gizzard. Give tnrpentine and olive oil as directed for the 

 treatment of Ascaris inHexa infestations. The treatment 

 shonld be repeated three or four times at inter- 

 vals of one week. 



Eradication of Worms. — A campaign to con- 

 trol the round worms of all kinds infesting the 

 intestinal tract involves both treatment of the 

 fowls in order to expel the worms, and disinfec- 

 tion and sanitation of the coops and I'uiiways to Fig. 40 Spir- 



^ . '- OPTERA HAMU- 



])revent reintestation. i^osa (natural 



Birds do not like mash in which there is ^ ^^^^'^ ^ 



, m A, male; B, 



nicoTporated turpentnie, or areca nut. lo- female. 

 bacco stems finely chopped and steeped in 

 hot water for two hours and this mixed with mash, gives 

 uniformly good results and is readily eaten liy the fowls. 

 Experiments in this lal)oratory show that badly infested 

 birds expel large numbers of worms and upon post 

 mortem examination are entirely freed from the infestation. 

 Two doses should be given three days apart. For each fifty 

 fowls, one-half pound finely chopped tobacco stems should be 

 used. The birds should be fed this mixture in the morning, 

 or on an empty crop. In the evening give to each fifty fowls 

 five ounces of epsom salts dissolved in water and this water 

 mixed with mash. Do not give any other feed for that day. 

 For chicks give doses in proportion to the size of the birds. 

 This treatment will cost about one cent for each ten birds. 



The treated birds should be moved to yards and houses free 

 from infestation. In yards where infested fowls have been 

 kept it has been found, upon microscopic examination, that 

 the soil may be infested by the eggs of the round intestinal 

 worms to a depth of two inches below the surface. For dis- 

 infecting the yards a corrosive sublimate solution 1 to 1,000 

 may be used. This is applied by aid of a sprinkling can after 

 all' rubbish has been swept up and removed. One gallon of 

 the solution should be used for each ten square feet. 



The houses should be thoroughly cleaned and every square 

 inch saturated with the corrosive sublimate solution. The 

 litter removed from the yard and house should be hauled out 

 and scattered on a field used for raising crops and remote from 

 the fowls. 



iMercuric chlorid (corrosive sublimate) is poisonous and care 

 must be taken not to allow the birds to di-ink it or the food 

 or water to become contaminated with it. After the feed and 

 water troughs have been thoroughly scrubbed inside and out 

 with the solution, they must be rinsed with clear water. 



