. A text-book of agricultural zoology. Zoology, Economic. 76 ASCAEID^ AND FILAKID^. is found in the large intestine of the horse and other Equidse : it is known as Oxyuris curvula (fig. 28), and may often be seen hanging from the horse's anus. We have known these worms cause very serious emaciation in horses, but they are easily cleared out by the use of santonin powder. This vermifuge expels many females full of eggs, and immature forms. A long- tailed dimorphic form called Mastigodes (fig. 29) has been described by Nitzsch. Males are comparatively rare. These worms, I have observed, are pass
. A text-book of agricultural zoology. Zoology, Economic. 76 ASCAEID^ AND FILAKID^. is found in the large intestine of the horse and other Equidse : it is known as Oxyuris curvula (fig. 28), and may often be seen hanging from the horse's anus. We have known these worms cause very serious emaciation in horses, but they are easily cleared out by the use of santonin powder. This vermifuge expels many females full of eggs, and immature forms. A long- tailed dimorphic form called Mastigodes (fig. 29) has been described by Nitzsch. Males are comparatively rare. These worms, I have observed, are passed usually in the morning, generally num- bers together, the excreta of the host being full of their ova. Very closely related is the obnoxious little human worm, 0. vermiaularis. The Filaridw are long and filiform worms, all of which are found in con- nective tissue and never in the intestine. A com- mon form in the horse is Filaria papillosa, a white worm about six inches long found in the per- itoneal cavity. Thousands have been taken out of the thoracic cavity of the horse at one time. They sometimes even penetrate the scrotum, and a few have been found in the eye. The life-history of this worm, like many others, is quite unknown. Another species, known as F. immitis, is found in the heart and pulmonary artery of the dog. Neither, however, occasions sufficient loss to call for further remarks. Thymol administered as stated in Appendix I. is certain to free the intestines of Ascarid Fig. 28.—Oxydres of Horse. Females with sliort tails (=Curwu?a), liet. (From Neumann.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
