238 DISEASES OF THE HORSE. 



Wheezing. — This is a sound given from a horse having 

 enlarged glands, or thickening of the membrane of the 

 wind-pipe, or the glands pressing upon the liead decreasing 

 its calibre. Whistling is caused by tjie same alteration of 

 structure in the wind-])ipe. 



Whirl-Bone, a Sprain of the. — (See Sprains and 

 Hock.) 



Wind Galls. — Are soft but elastic swellings or enlarge- 

 ments. They are non-inflammatory in character, and are 

 produced by the same cause, governed by the same laws, 

 and present the same phenomena as bog, blood spavin, and 

 other enlarged or distended bursa of joints, which are all 

 produced by, and are evidences of hard work. No treat- 

 meut for them will be satisfactory, as they will return 

 again, even if they have been removed. 



Wind-Sucking.— (See Crib-Biter.) 



Worms. — The worms which inhabit the body of the 

 horse are of many varieties. Some of them are harmless, 

 while others interfere with his health. They are, 1st. The 

 bot or oestrus equi, f>und inhabiting the stomach. 2d. 

 The cestrus Hcemorrhoidalis or Fundament bot, found in 

 the rectum, and often seen about the anus, and under the 

 tail. 3d. The strongylus, and Filarial found in the aorta, 

 and other blood vessels. 4th. The ascarides vermicularisy 

 found in small cells within the mucous covering of the 

 coecum, or blind gut. 5th. Filaria, found in the aqueous 

 humor of the eye. 



(1.) Stomach Bot. — These worms are the result of 

 turning horses out to pasture in the summer months, and 

 are produced from the eggs laid or glued to the fore legs 

 of the horse, by the bot fly. 



Symptoms. An unthrifty coat, and loss of flesh after a 



