98 DISEASES OP CATTLE. 



irritation of the air passages and inflammation. Sometimes the 

 strongyles lodge in large numbers in the windpipe, forming them- 

 selves into a ball, and thus choke the animal to death. 



Symptoms. — It is liable to attack a number of animals at once, and 

 the weakest are the first to give way. The animal has a remarkably 

 forcible cough, distressing, and of a special hacking and paroxysmal 

 character. A stringy mucus is sometimes expelled during the spells of 

 coughing. This mucus contains the Strongylus micrurus, which can 

 be detected, or their ova observed, under a low power of the micro- 

 scope. The attack has a subacute character and proves very exhaust- 

 ing. The parasites, by becoming entwined in balls, seriously impede 

 respiration, which is always remarkably labored in this disease. 



Treatment. — The affected calves should be placed in a dry stable, 

 protected from dampness, and subjected to fumigations of sulphurous 

 anhydrid or chlorin gas. The liberation of chlorin gas is brought 

 about by the action of sulphuric acid, either on a mixture of chlorid 

 of sodium and black oxid of manganese or on bleaching powder. 

 Sulphurous anhydrid may be procured by burning sulphur. Some 

 practitioners prescribe small doses of spirits of turpentine in linseed 

 oil. The system requires good support, and the diet should therefore 

 be liberal and nutritious. Equal parts of Bulphate of iron, gentian, 

 and ginger make an excellent tonic- 



Prevention. — Avoid pastures notorious for generating verminous 

 bronchitis. 



PLEURODYNIA. 



This is a term applied to rheumatism of the intercostal muscles. 

 The apparent symptoms are quite similar to those of Dleurisy. The 

 animal is stiff and not inclined to turn around, and the ribs are kept 

 in a fixed state as much as possible. Pleurodynia may be distinguished 

 from pleurisy by the coexistence of rheumatism in other parts and 

 by the comparative absence of fever, cough, the friction sound, and 

 the effusion into the chest. The treatment for this affection is the 

 same as that for rheumatism affecting other parts. 



