Diseases & disorders of the Diseases & disorders of the horse : a treatise on equine medicine and surgery diseasesdisorder00gres Year: 1886 84 canal of the horse they get into the small vessels of the gut, and pass on into the large arteries, and becoming embedded in the walls of these larger blood vessels, they cause bulgings termed aneurisms. Lastly, these parasites make their way out of the vessels, and thence endea\our to make for the large gut, where they again change their skins, and, adhering to the mucous lining of the bowel by means of their spines, attain sexual maturity. 3 1 An
Diseases & disorders of the Diseases & disorders of the horse : a treatise on equine medicine and surgery diseasesdisorder00gres Year: 1886 84 canal of the horse they get into the small vessels of the gut, and pass on into the large arteries, and becoming embedded in the walls of these larger blood vessels, they cause bulgings termed aneurisms. Lastly, these parasites make their way out of the vessels, and thence endea\our to make for the large gut, where they again change their skins, and, adhering to the mucous lining of the bowel by means of their spines, attain sexual maturity. 3 1 Aneurysmal Armed I, male, natural size ; 2, female, natural size ; 3, anterior extremity, highly- magnified ; a, complete buccal capsule ; b, (lesphagus, or gullet ; c, intestine. 4, caudal extremity of the male worm ; A, hook and accessory part. (Rayer). The aneurysms or swellings occur in a large percentage of horses and' asses, and they vary in size from a pea to a man's head, and are met with in animals six months old and upwards. The number of worms in an aneurism varies, and is usually nine to ten, the highest .number in one horse being 121. It has been said 'that foals and yearlings suffer more from parasites in the paddocks, than they do on adjoining farms where only a few animals are bred.'' 'This is explained,' says Dr. Cobbold, 'by the relatively greater amount of Qgg dispersion proceeding from the infected brood mares. It is quite evident that the lives of many valuable animals arc annually sacrificed by the neglect of hygienic arrangements. The palisade A\orm, as this parasite is commonly called, is chiefly destructive to young animals, and, as Mr. Percivall has remarked, is commonly the cause of lingering and hidden disease terminating in death, without any suspicion on the part of the practitioner as to the nature of the malady.'' Treatment for these worms fs not of much value. We have lastly to speak of the common hydatid of the horse. It is well known
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