. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. THE DOG AS A OAKBIER OF PARASITES AND DISEASE. —-« GID. Gid disease, like hydatid disease, is due to the presence of a blad- der worm, or larval tapeworm, in the tissues. The bladder worm (known as MvZticeps multiceps or Ocenurus cerebralis) (fig. 4) which causes gid resembles the hydatid bladder worm in that one bladder worm may produce large numbers of tapeworm heads, and the tape- worms resulting from these heads occur in the intestines of dogs, as in the case of the hydatid tapeworm. The bladder wor
. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. THE DOG AS A OAKBIER OF PARASITES AND DISEASE. —-« GID. Gid disease, like hydatid disease, is due to the presence of a blad- der worm, or larval tapeworm, in the tissues. The bladder worm (known as MvZticeps multiceps or Ocenurus cerebralis) (fig. 4) which causes gid resembles the hydatid bladder worm in that one bladder worm may produce large numbers of tapeworm heads, and the tape- worms resulting from these heads occur in the intestines of dogs, as in the case of the hydatid tapeworm. The bladder worm caus- ing gid differs from the hydatid in that it has a thin, delicate, membranous wall in- stead of a thick lam- inated wall; it does not produce daughter cysts as the hydatid does, and it occurs only in the brain and spinal cord in- stead of in any tis- sue. The adult tape- worm in the dog, commonly known as Tcenia ccenurus (fig. 6) attains a length of 2 or 3 feet instead of a small fraction of an inch. Gid is principally a disease of sheep, though it is fairly common in cattle and there are some cases from the horse and the goat. In 1910^ the writer stated that there were no valid cases of the disease in man. Since then Brumpt ^ has published one case which apparently must be accepted as a good case. The life history of the gid parasite is practically the same as that of the hydatid. The gid bladder worm is called a ccenurus. When this ccenurus is eaten by a dog, the tapeworm heads on the ccenurus pass to the intestine of the dog and give rise to a tapeworm which ^ The gid parasite and allied species of the oestode genus Multiceps. I. Historical review. By Maurice C. Hall. Bureau of Animal Industry Bulletin 125, pt. 1. 2 Precis de parasltologle, 2d ed., pp. 281-283. 1913. 94288°—Bull. 260—15 2. Fig. 4.—Brain of giddy sheep, showing gid parasite, o, Gid parasite or bladder worm; T>, heads on bladder worm. (After Numan, 1850, PI. I, fig. 1.). Please note that th
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