Intestinal worm

“ They are usually few in number, but occasionally occur in such large numbers that they cause intestinal obstruction. Unlike the tapeworm no intermediate host is required for the development of this worm. ”

“ They are found in all animals and fish—those in apparent health as well as those that are sick—and part they play in the economy of nature is confessedly obscure. It is generally conceded that it is only in peculiar or morbid conditions, or under a course of diet and regimen unfavorable to health, that they multiply or increase to such an extent as to become of themselves a source of irritation and disease. It is under these conditions that INTESTINAL WORMS become the subject of medical treatment.
No animal is so subject or so frequently tormented by worms as the dog. ”

“ In general, the frequency of occurrence of intestinal worms is proportioned to the extent of use of uncooked or insufficiently cooked meats, the drinking of unfiltered standing waters, uncleanly habits, and the intimacy of association with domestic animals. It therefore follows that important prophylactics against infection by parasites are properly-cooked food, the use of spring or freely-running water or filtered standing water, cleanly habits, and the avoidance of intimacy with domestic animals. ”

“ The long thread-worm is a not unfrequent intestinal parasite of man, though rarely observed unless specially sought, as it ordinarily gives rise to little or no disturbance. It is common in England, Southern Europe, and the Orient. Davaine reports that half the cases of persons investigated in Paris were infested with it; it also occurs in this country. It inhabits the lower end of the ileum, the cæcum, and vermiform appendix, and feeds on the intestinal contents. ”

“ Debility resulting from hard work, wrong methods of feeding and intestinal disorders must be corrected before the periodic attacks of indigestion can be relieved. If the presence of intestinal worms is suspected, the necessary treatment for ridding the animal of these parasites should be resorted to. ”

“ The saliva of the hookworm has the curious property of preventing coagulation of blood like leech extract, and when it is remembered that the worms may vary in number from several hundred to a thousand or more, and that each worm moves frequently from place to place on the intestinal wall, it is apparent how excessive and continuous is the drain on the blood and lymph juices. ”

“ The Metazoa supply examples of intestinal parasites from the classes Annuloida and Nematoidea. To the former class belong the various tapeworms found in the small intestine of man. They, like other intestinal parasites, are destitute of any power of active digestion, simply absorbing the nutritious proceeds of the digestive processes of their hosts. Nematode worms infest both the small and large intestine; Ascaris lumbricoides, the common round worm, and the male Oxyuris vermicularis are found in the small bowel, the adult female Oxyuris vermicularis and the Tricocephalus dispar in the large. ”

“ The intestinal worms, of which perhaps the Tænia is the most curious and important to be noticed, are from the locality in which they are found, chiefly injurious by the irritation they set up, and by appropriating {135}to themselves the nutrient juices elaborated in the process of animal digestion, thus depriving the individuals they infest of that which was destined for their own nourishment. ”

“ As eccentric irritating causes may be mentioned intestinal worms, but I am convinced that it is too often the fashion to ascribe convulsions in children to intestinal parasites: in very young children, however, there are frequent examples of the disease in which the attacks are precipitated by worms. ”

“ The natural and ordinary habitation of the round-worm is the small intestine, especially the jejunum, and it commonly only occurs in the large intestine, mostly dead, on the way to be discharged with the evacuations. Under disturbing circumstances, as the character of certain irritating food, the parasite is disposed to become restless and wander from its usual position. Not unfrequently it enters the stomach, and thence may ascend to the mouth or nose, and perhaps the first intimation of the presence of such an unwelcome guest is in its expulsion from the mouth. ”

“ It does not follow, because no worms are seen to pass away, that one who exhibits the other symptoms of them has none; neither, when they are not seen, does it follow even that none pass; for, if they remain long in the intestines after they are dead, they become digested like other animal matter.
The treatment of worm cases in dogs has been like that of the human, and the remedies employed have been intended either to destroy the worms within the body, or otherwise to drive them mechanically, as it were, out of the bowels by active purgatives ”

“ Unless the ova are too large they often succeed, and the eggs are deposited uninjured in their feces, in some cases up to the third day at least. The eggs may also be carried on their legs or bodies. Under suitable conditions, food and fluids may be contaminated with the eggs of various parasitic worms by flies, and in one case infection of the human subject has been observed. Feces containing tape-worm segments may continue to be a source of infection for as long as a fortnight. ”

“ To this opinion, I object the uncertainty of worms ever producing an idiopathic fever, and the improbability of their combining in such a manner as to produce an annual epidemic disease of any kind. But further, we often see the disease in all its force, before that age, in which worms usually produce diseases; we likewise often see it resist the most [159] powerful anthelmintic medicines; and, lastly, it appears from dissection, where the disease has proved fatal, that not a single worm has been discovered in the bowels. ”

“ The large worms inhabit the small intestines, and the small ones the large intestines, the larger class of worms being more readily reached by worm destroyers than are the smaller ones, as the small intestines begin at the stomach and as remedies leave the stomach, the worm soon receives the dose prepared for it, while if one dose has to pass through about 60 feet of intestines before reaching the smaller worms in the larger intestines, much of the worm remedy is lost by mingling with the food, and diluted by mixing with the digestive fluids. ”

“ The proglottides containing the eggs pass out of the final host along with the faeces and enter the intermediate host with the food. The larvae hatch, and boring their way into the blood-vessels, are carried by the circulation to various internal organs. Here they usually become "bladder-worms," and develop the "head" of the future sexual form. Then, if, as is usually the case, the intermediate host is preyed upon by the final host, the larval Cestodes enter the alimentary canal of the latter. The head of the larva alone survives digestion, and from it the mature worm is formed. ”

“ Clinging by means of the head to the mucous membrane of the intestine, and involved among the valvulæ conniventes and villi, the worm may extend in loose folds along the greater part of the course of the intestine or lie coiled in an elongate mass. Besides being rendered evident from time to time by the discharge of segments or fragments, the beef tape-worm especially sometimes introduces itself to the notice of its host through the segments creeping from the anus. Sometimes segments of tape-worms are vomited, especially in women ”

“ While their home is in the small intestines they often travel to other parts of the body. They have sometimes crawled into the stomach and have been vomited. The only definite symptom of worms is to find the eggs or the worms themselves in the stool. No worm medicine should ever be given by the mouth without being prescribed by a physician. Cases are on record where well-meaning mothers have killed their children by giving an over dose of worm medicine. ”

“ Children suffering from worms should eat meat freely and not take so much bread, vegetables, and farinaceous food as children generally do. They should have as much exercise as possible in the open air, and be sponged with cold water every morning. The worms that mostly trouble children are the thread worms, which are present chiefly in the lower portion of the intestines, and the round worm. ”

“ There it swings, and lives by sucking the blood of its victim. When the worm has once attached itself in the intestine, it may live for from five to fifteen years. All this time it is constantly laying eggs; and these eggs, which are so tiny that they have to be put under a microscope to be seen, pass out in the feces; and if they are not deposited in a proper water closet, or deep vault, but scattered about upon the surface of the soil, the eggs quickly hatch into tiny, little wriggling worms called larvæ, which are still scarcely large enough to be seen with the naked eye. ”

“ The developing eggs are passed off with wastes from the intestine of man. The pig, an animal with dirty habits, may take in the worm embryos with its food. The worm develops within the intestine of the pig, but soon makes its way into the muscle or other tissues. It is here known as a bladderworm. If man eats raw or undercooked pork containing these worms, he may become a host for the tapeworm. Thus during its complete life history it has two hosts. Another common tapeworm parasitic on man lives part of its life as an embryo within the muscles of cattle. ”

“ There is hardly a symptom of any disease which has not been supposed by some to be a sign of the presence of worms. A child suffering from some other complaint is, therefore, not unfrequently dosed with vermifuges to its injury. We can give the mother one symptom of worms which is infallible. It is the only one upon which she can rely, namely, the detection of worms in the stools of the child. Until these expelled intruders are actually found she should be slow to believe that the child is thus affected, and still slower to give worm medicine. ”

“ Worms.—Intestinal parasites are symptoms rather than a cause of defective digestion, and drastic medicines (calomel, Glauber's-salt, etc.) are merely palliatives; even a change of diet may fail to afford permanent relief if the general mode of life favors a costive condition of the bowels. Like maggots, maw-worms seem to thrive only on putrescent substances, on accumulated ingesta in a state of self-decomposition, and disappear as soon as exercise, cold fresh air, and a frugal diet have reestablished the functional vigor of the digestive organs. ”

“ Symptoms.—Puppies are more susceptible to these worms, although we find them in aged dogs. About fifty per cent of the dogs are infested with these worms. They cause irritation of the intestines, irregularity of digestion, diarrhoea, colic, nervousness, constipation, [116] irregular appetite and a rough, dry, unthrifty appearance of the hair and skin, and the dog becomes emaciated. After this worm migrates into the stomach, it causes nausea and vomiting, occasionally the bowels are filled with large masses of these worms, and their passage aids in determining the cause of the dog’s debility. ”

“ All the ordinary symptoms are quickly relieved by the expulsion of the tape-worm—permanently if it is entirely removed, but temporarily, as is frequently the case, when only the greater bulk of the parasite is discharged and the head continues to remain securely attached to the intestine and ready to renew its many-segmented body. ”

“ The tape-worm infests the whole course of the bowels, both small and large: the long round-worm, principally the small bowels, occasionally the stomach; it sometimes crawls out of the child's mouth, causing alarm to the mother; there is, of course, no danger in its doing so: the common thread-worm or maw-worm infests the rectum or fundament. ”

“ These Round Worms are particularly plentiful in the intestines of the Horse, where perhaps they cause the gravest functional disturbances; but they also invade the kidneys, eyes, blood-vessels, serous membranes, skin, &c.In Europe our chief pests are intestinal in habit, often causing great mortality in foals. ”

“ The causes of worms are—weak bowels; bad and improper food, such as unripe, unsound, or uncooked fruit, and much green vegetables; pork, especially underdone pork; an abundance of sweets; the neglecting of giving salt in the food. One frequent, if not the most frequent, cause of tape-worm is the eating of pork, more especially if it be underdone. Underdone pork is the most unwholesome food that can be eaten, and is the most frequent cause of tape-worm known. Underdone beef also gives tape-worm; let the meat, therefore, be well and properly cooked. ”

“ This disease is frequently seen in low, marshy pastures, where animals infested with the worm pass the ova or egg with the feces, the eggs developing into an embryotic worm which is again taken with the food or water by non-infected animals, whereby this disease again attacks the intestines and fully matured worms develop. ”

“ When worms are wanted for immediate use, and no provision has been made, the way to scour them quickly, is, if lob-worms, to put them all night in water; brandlings must not remain above one hour in it, and both sorts must be then put with fennel into the angler’s worm-bag.
Worms of different kinds inhabit the intestines; but except when they exist in very great numbers, they are not so hurtful as is generally supposed, although the groom or carter may trace to them hidebound, and cough, and loss of appetite, and gripes, and megrims, and a variety of other ailments. ”