Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.
|
See also:SCURVY (Scorbutus) , a constitutional disease, characterized by debility, morbid conditions of the See also:blood, spongy gums, impairment of the nutritive functions, and the occurrence of haemorrhagic extravasations in the tissues of the See also:body . In former times this disease was extremely See also:common among sailors, and gave rise to a frightful amount of mortality . It is now, however, of rare occurrence at See also:sea, the See also:simple means of prevention being well understood . See also:Scurvy has also frequently broken out among soldiers on See also:campaign, in beleaguered cities, as well as among communities in times of scarcity, and in prisons, See also:work-houses and other public institutions . In all such instances it has been found to depend closely upon the See also:character of the See also:food . The precise etiology is obscure, and the See also:modern tendency is to suspect an unknown micro-organism; on the other See also:hand, even among the more chemical school of pathologists, it is disputed whether the cause (or conditio sine qua non) is the See also:absence of certain constituents in the food, or the presence of some actual See also:poison . See also:Sir Almroth See also:Wright in 1895 published his conclusions that scurvy was due to an See also:acid See also:intoxication, while Torup of See also:Christiania believes it to be a See also:direct poisoning from damaged and badly preserved See also:meat . Dr See also:Jackson and Dr Harley support this latter view, contending that scurvy occurs when meat is eaten in this See also:condition, even when See also:lime juice and vegetables are given in See also:conjunction with it . The palmy days of the disease were those when sailors and soldiershad to fare on See also:salt meat and " hard tack," or were deprived of fresh vegetables; and the fact that scurvy has been practically abolished by the See also:supply of these latter has led to the association of this See also:factor with the disease as a See also:vera causa . But how the defect in See also:vegetable See also:diet produces scurvy is not quite clear; nor how far other conditions may be involved . The symptoms of scurvy come on gradually, and its onset is not marked by any See also:special indications beyond a certain failure of strength, most See also:manifest on making effort . Breathlessness and exhaustion are thus easily induced, and there exists a corresponding See also:mental depression . The countenance acquires a sallow or dusky See also:hue; the eyes are sunken; while pains in the muscles of the body and limbs are constantly See also:present . The appetite and digestion may be unimpaired in the earlier stages and the See also:tongue comparatively clean, but the gums are See also:tender and the breath offensive almost from the first . These preliminary symptoms may continue for See also:weeks, and in isolated cases may readily See also:escape See also:notice, but can scarcely fail to attract See also:attention where they affect large See also:numbers of men . In the further stages of the disease all these phenomena are aggravated in a high degree and the See also:physical and mental prostration soon becomes extreme . The See also:face looks See also:haggard; the gums are livid, spongy, ulcerating and bleeding; the See also:teeth are loosened and drop out; and the breath is excessively foetid . Extravasations of blood now take See also:place in the skin and other textures . These may be small like the petechial spots of See also:purpura (q.v.), but are often of large amount and cause swellings of the muscles in which they occur, having the See also:appearance of extensive bruises and tending to become hard and brawny . These extravasations are most common in the muscles of the See also:lower extremities; but they may be formed any-where, and may easily be produced by very slight pressure upon the skin or by injuries to it . In addition, there are bleedings from mucous membranes, such as those of the See also:nose, eyes and alimentary or See also:respiratory tracts, while effusions of blood-stained fluid take place into the pleural, pericardial or peritoneal cavities . Painful, extensive and destructive ulcers are also See also:apt to break out in the limbs . See also:Peculiar disorders of See also:vision have been noticed, particularly See also:night-See also:blindness (nyctalopia), but they are not invariably present, nor specially characteristic of the disease . The further progress of the malady is marked by profound exhaustion, with a .tendency to See also:syncope, and with various complications, such as See also:diarrhoea and pulmonary or See also:kidney troubles, any or all of which may bring about a fatal result .
On the other hand, even in desperate cases, recovery may be See also:hope-fully anticipated when the appropriate remedy can be obtained
.
The See also:composition of the blood is materially altered in scurvy, particularly as regards its albumen and its red corpuscles, which are diminished, while the fibrine is increased
.
No disease is more amenable to treatment both as regards prevention and cure than scurvy, the single remedy of fresh vegetables or some See also:equivalent securing both these ends
.
Potatoes, cabbages, onions, carrots, turnips, &c., and most fresh fruits, will be found of the greatest service for this purpose
.
Lime juice and See also:lemon juice are recognized as equally efficacious, and even See also:vinegar in the absence of these will be of some assistance
.
The regulated See also:administration of lime juice in the See also:British See also:navy, which has been practised since 1795, has had the effect of virtually extinguishing scurvy in the service, while similar regulations introduced by the British See also:Board of See also:Trade in 1865 have had a like beneficial result as regards the See also:mercantile marine
.
It is only when these regulations have not been fully carried out, or when the supply of lime juice has become exhausted, that scurvy among sailors has been noticed in See also:recent times
.
Wright has proposed giving what he terms See also:anti-scorbutic elements (Rochelle salt, See also:calcium chloride or lactate of See also:sodium) instead of raw materials such as lime juice and vegetables, as being more convenient to carry on voyages
.
Besides the administration of lime or lemon juice and the use of fresh meat, See also:milk, See also:cider, &c., which are valuable adjuvants, the See also:local and constitutional conditions require the attention of the physician
.
The ulcers of the gums and limbs can be best treated by stimulating astringent applications; the hard swellings, which are apt to continue See also:long, may be alleviated by fomentations and frictions; while the See also:anaemia and debility are best overcome by the continued administration of See also:iron tonics, aided by fresh See also:air and other See also:measures calculated to promote the See also:general See also:health
.
Infantile Scurvy (Scurvy See also:Rickets, See also:Barlow's disease), a disease of childhood due to a morbid condition of the blood and tissues from defects of diet, was first observed in See also:England in 1876 by Sir T
.
See also: The See also:chief symptoms are See also:great and progressive anaemia, mental apathy, spongy gums, haemorrhages into various structures, particularly under the periosteum and muscles, with suggestive thickenings See also:round the shafts of the long bones, producing a See also:state of pseudo-See also:paralysis . |
|
|
[back] SCULPTURE (Lat. sculptura, from sculpere, to carve,... |
[next] SCUTAGE |
There are no comments yet for this article.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are encouraged.