64 PARASITES OF THE DOMESTIC ANIMALS 



Treatment. — The location of the grubs and the tortuous extremity 

 of the canals leading to such regions render the application of remedies 

 looking to their dislodgment but partly effective at best. Benzene ap- 

 plied by lifting the head and pouring a teaspoonful into each nostril, 

 has been recommended. As one side is treated the head should be 

 held elevated and the nostril held shut for half a minute. The remedy 

 is then likewise applied to the other side. In severe cases a few of the 

 grubs ma.y be dislodged by a feather dipped in turpentine which is 

 passed as far as possible up the nasal passage and rotated so as to apply 

 it to as much of the surface as can be reached. Valuable breeding 

 animals showing severe infestation may be treated by trephining the 

 sinuses. 



Prevention. — To prevent the fly from depositing its larvae the noses 

 of the sheep ma}^ be smeared with tar. For the convenient application 

 of this preventive remedy many flock owners use salt logs in their pas- 

 tures. Into these logs two-inch holes are bored at intervals of about 

 six inches in each of which a little "salt is kept during the fly season. 

 Two or three times a week tar is smeared with a brush around these 

 holes in such manner as to smear the noses of the sheep as they en- 

 deavor to reach the salt. The logs should be of sufficient length to enable 

 all the sheep to get to them. 



