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It has aiso been found in the reed and duodenum of 

 the latter animal by Rudolphi. Two other species of 

 the genus Strongle, the S. contortus and S. filicotlis, 

 have been detected in the sheep, the former in the 

 belly, the latter in the small intestines. They all 

 appear to originate only in such sheep as are exposed 

 the sapping influence of low damp situations, com- 

 ined with stinted diet. Those occuring in the air 

 tubes give rise to irritation, and a consequent harassing 

 cough, which is only to be arrested by removing the 

 sheep to a dry airy locality, and a nutritious pasture. 

 Unless portions of the worms are thrown up during 

 coughing, they cannot be pronounced with confidence 

 to exist, as the symptoms which they produce are very 

 similar to those which accompany the two following 

 diseases. 



(157.) Coryza. During the winter months, this 

 affection is of very frequent occurence among sheep ; 

 but health is only in a few instances seriously affected. 

 It is brought on by the exposure of the animal to in- 

 nse cold, or to sudden chills, after it has been heated, 

 n slight cases, the only annoyance to which the sheep 

 s subjected, is from matter accumulating in the nostril, 

 d plugging up the orifice, so that the poor creature 

 s compelled to raise its head every three or four 

 inutes, and labour hard for breath.* When the in- 

 flammation extends further down the air tubes, the 



♦ The sheep is more inconvenienced by Coryza than other animals, 

 owing to the naturally small calibre of the nostrils, the inferior tur- 

 binated bone being of large dimensions, and occupying the greatw 

 part of the nasal ravity. It is from this peculiar formation of the no«e, 

 that sheep are so very easily blowii, when made to exert themselves wi 

 nmiiing. 



