ANIMAL PARASITES 2U3 



bronchial tubes, and the hair-worm in the most minute as well as 

 the larger bronchioli. 



This disease is most common in wet seasons. Undrained 

 pastures and ponds are said to favor the spread of the disease. 

 Permanent pastures favor the reinfection of the flock from. 

 year to year. The eggs and embryos are expelled in coughing, 

 and live for a time in the pastures, pens and houses. The sheep 

 become infected through the dust, drinking water or feed. 



The sijmploms of vermiuous hro)ichilis and pneumonia are 

 quite characteristic. Lambs suffer most from these diseases. 

 A number of animals in the tlock are affected. ( 'oughing, rapid 

 and labored breathing, loss of appetite, emaciation and weak- 

 ness are the usual symptoms noticed. When a paroxysm of 

 coughing occurs, considerable mucus is expelled. An examina- 

 tion of the expectorations may result in finding a few lung 

 worms. In poorly-cared-for flocks, and when complicated by 

 stomach and intestinal worms, the death rate is usually heavy. 



The treatment of lung-worm diseases in lambs and calves is 

 largely preventive. We should use every possible precaution 

 against introducing the infection into the herd or flock. It is 

 not advisable to bring animals from an infected herd onto the 

 premises, without subjecting them to a careful examination and 

 a long quarantine before allowing them to stable or pasture with 

 the other animals. Calves or lambs that show marked symptoms 

 of disease should be given comfortable quarters, and special 

 care and feeding. The entire herd or flock must be given the 

 best care and ration possible. This is the only satisfactory 

 method of treatment. Changing the pasture or lot frequently 

 may help in ridding the premises of the infection. 



Verminous Bronchitis in Hogs. — The lung worm, Strongy- 

 Jus paradoxus, is a common parasite of young hogs. It is 

 from 0.6 to 1.6 inches (16 to 40 mm.) long. When the infec- 

 tion is light, the worms are found mostly in the bronchial tubes 

 of the margin and apex of the lung. 



