37 



structed that birds cannot step into them. If at all possible, birds 

 should be moved upon new ground. The parasites' eggs in the 

 droppings removed from the henhouse may be destroyed by mix- 

 ing the manure with unslaked lime. 



''The birds may be given one teaspoonful of turpentine fol- 

 lowed by a tablespoonful of olive oil. If the crop is full the dose 

 of turpentine should be double. Five to ten-grain doses of areca 

 nut is good treatment. The areca nut can be mixed with soft 

 feed and fed from a clean trough; it acts as a cathartic as well 

 as a parasiticide. One-grain doses of thymol are an excellent 

 treatment for round worms. 



"Eradication of Worms. A campaign to control the round 

 worms of all kinds infesting the intestinal tract involves both 

 treatment of the fowls in order to expel the worms, and disin- 

 fection and sanitation of the coops and runways to prevent in- 

 festation. 



"Birds do not like mash in which there is incorporated tur- 

 pentine or areca nut. Tobacco stems finely chopped and steeped 

 in hot water for two hours and mixed with mash gives uniformly 

 good results and is readily eaten by the fowls. Experiments in 

 this laboratory show that badly infested birds expel large num- 

 bers 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 to- 

 bacco stems should be used. The birds should be fed this mix- 

 ture 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 disinfecting the yards 

 a corrosive sublimate solution 1 to 1,000 may be used. This is 

 applied by aid of a sprinkHng can after all rubbish has been 

 swept up and removed. One gallon of the solution should be 

 used for each ten square feet. 



"The house should be thoroughly cleansed 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 removed from the 

 fowls. 



"Mercuric chlorid (corrosive sublimate) is poisonous, and care 

 must be taken not to allow the birds to drink 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." 



