CHAPTER XIII. 

 PARASITIC DISEASES OF CATTLE. 



I. HOOSE OR HUSK (VERMINOUS BRONCHITIS). II. THE GADFLY AND GRUB 



(OESTRUS BOVIS). III. LICE. IV. TAPEWORM. V. MANGE. VI. 



RINGWORM. VII. HOOK-WORM DISEASE OF CATTLE. 



I. Hoose or Husk (Verminous Bronchitis.) 



The symptoms of this disease are similar to those of bronchitis. The 

 difficulty is caused by a species of strongulus — worms — (filaria bron- 

 chitis) the eggs of which are swallowed in grazing. Calves, and especially 

 sheep, are the most likely to be affected, for the reason that they bite 

 closer than cattle. 



How to know it. — There will be a slight, husky cough, recurring at 

 irregular intervals. The coat will soon become staring, and the breath- 

 ing more and more embarrassed. The cough becomes more frequent, 

 and in character more suffocating and mucous; worms, either singly or 

 rolled together, will also be coughed up. 



What to do. — Feed liberally with the soundest and most nutritious diet 

 possible, including linseed or cotton cake, and roots, mixing in the food 

 some good tonic, such as recipe ISJo. 4. For calves, make four doses of 

 the recipe. Burn turpentine on pine shavings in the pen with the calves, 

 and let them breath the fumes, and give them a tablespoonful of sulphur 

 in the food once a day for two weeks. 



Prevention. — This is better than cure. The forms from which //ana 

 bronchitis emanate are found In low, wet, undrained pastures. Hence, 

 keep the stock off such pastures when the trouble is found, especially 

 when wet with dew or rain. Do not allow animals to drink from stag- 

 nant ponds or pools, and look to the proper drainage of the pastures, 

 II. The Gadfly and Grub (CEiStrus Bovis). 

 Little rounded tumors will often be found along the backs of cattle, 

 during late winter and spring. 

 These are called warbles, and 

 are the lairs of the larvae of the 

 ox gadfly (^cestrus bovis). Each 

 tumor contains a grub, which may 

 ox GADFLY (cES- ^^ squcczcd out by pressure,some- ^^^^ ^^ gadfly. 

 TRus BOVIS.) times escaping with such force as 



to fly several feet. Sometimes it is necessary to enlarge the orifice with 



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