. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. THE DOG AS A CAEEIER OP PAEASITES AND DISEASE. 13 by sheep as they graze over range or pasture or drink water con- taminated by these feces. In the sheep the eggshell, is digested,- the released embryo bores through the tissues and comes to rest usually in the edible musculature, and the bladder worm develops to the cysticercus capable of again infecting the dog. In cases of heavy infestation sheep are liable to die in the course of two to three weeks, but as a rule the health is not perceptibly affected. Here
. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. THE DOG AS A CAEEIER OP PAEASITES AND DISEASE. 13 by sheep as they graze over range or pasture or drink water con- taminated by these feces. In the sheep the eggshell, is digested,- the released embryo bores through the tissues and comes to rest usually in the edible musculature, and the bladder worm develops to the cysticercus capable of again infecting the dog. In cases of heavy infestation sheep are liable to die in the course of two to three weeks, but as a rule the health is not perceptibly affected. Here, as in all similar cases, the parasite must pass from the dog ttp the sheeip and from the sheep to the Fig. -Tapeworm (Tcenia ovis) developed by feeding bladder woviu.(,Cit8ticercue,ovis) to a dog. (From Ransom.) '^' The parasite has been found in Europe, Africa, and New Zealand. It has been found thus far in seven States in this countr;^. It appears to be particularly prevalent in the West, a fact that is'possibly re- lated to carelessness on the part of the western sheepmen as regards the disposal of carcasses of sheep dying on the range. Such sheep are usually left lying where they die, a practice which aids in the spread and continuance of gid, and which serves the same purpose in the case of the " sheep measles " parasite that throwing diseased viscera of hogs onto the fields does in the case of the hydatid para- site. The sheep dog is probably the principal carried' k>f'the parasite^. 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 Hall, Maurice C. (Maurice Crowther), 1881-1938. Washington [Govt. Print. Off. ]
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