VERMINOUS BRONCHITIS IN SWINE. LUNG WORMS 



IN PIGS. 



Strongylus Paradoxus : Six labial papillae ; 5 to 12 lines long ; male caudal 

 membrane has five ribs ; female witb sharp pointed, curved tail ; oviparous 

 or ovoviviparous, ova elliptical vpith folded embryo. Host : Bronchia of 

 pig (sheep?). Development as in filaria. History. I<esions as in sheep. 

 Symptoms : Obscure, unthrift, ansemia, emaciation, paroxysmal cough, in 

 most of young in herd, expectoration containing worms or ova ; recoveries 

 common. Treatment as for sheep. Prevention : Change pen and range ; 

 avoid all, possibly contaminated, pond, stream, or well-water, boil all water 

 given ; keep on wooden or cement floors, moderately salt all food, separate 

 infested from uninfested ; wean and separate young pigs early. 



This affection, caused by strongylus paradoxus has been 

 little noticed, yet it is far from uncommon in young and growing 

 pigs, though almost unknown in the adult animal. 



Strongylus Paradoxus fMehlis). Strongylus Elongatus 

 (Duj). Lung 'Worm of Swine. Delicate filiform worm, white 

 or brownish. Mouth terminal, round, with six papillae. Maie )4 

 to ^ inch, female i to i^ inch long. Caudal bursa of male 

 deeply bilobed each lobe supported by five rays. Two long, 

 delicate spicula. Tail of female curved with sharp point. Vulva 

 on a pre-anal tubercle. Oviparous, or ovoviviparous. Ova ellipti- 

 cal with contained embryo folded several times. 



Habitat. Trachea and bronchia of pigs, wild and tame. A. 

 ,Koch claims to have found them in sheep. 



The development of the parasite has not been traced but is 

 probably similar to that of the strongylus filaria and is favored by 

 similar local conditions, allowance being made for the fact that 

 the ravages of the worm are confined to swine only. 



History. Toward the end of the i8th century this worm was 

 found by Ebel, Goeze, Modeer, Mehlis, etc., and early in the 

 19th century by Bellingham, Dujardin, Rayer, and Chaussat, 

 first in the Paris abattoirs and by Bellingham in those of Dublin, 

 Chatin found them to be common in France, Boudeaud, in the 

 department of Indre, and Modena in Sardinia and the Maremmes 

 of Tuscany. The author has frequently found them in unthrifty 

 pigs and shoats in Central New York. 



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