Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.
|
See also:TETANUS (from Gr. rei:vw, I stretch, on See also:account of the tension of the See also:fibres of the affected muscles), or LOCKJAW
, a disease caused by the bacilli Tetani (see PARASITIC DISEASES)
.
The See also:home of these bacilli is the See also:earth, and so it comes about that if a See also:man is thrown off his See also:bicycle and grazes his ungloved See also:hand. upon the road, or See also:running without shoes cuts his See also:foot, there is a considerable See also:chance of the bacilli entering the See also:wound and giving him lockjaw
.
It is popularly thought that wounds in the region of the thumb are most often followed by the disease, but this is not a fact
.
Wounds about the thumb are of See also:common occurrence, but they are not, in proportion, more often the starting point of See also:tetanus
.
Acute traumatic tetanus is very deadly, and up to the See also:present See also:time nothing has been discovered to check or See also:guide its almost certainly fatal course
.
It often picks out the See also:young and vigorous as its victims—the See also:athlete, for instance, who meets with some mishap in the See also: But wherever it occurs it is due to the one cause—to the reception into some wounded See also:surface of the specific germs . In hot countries tetanus is more common and more acute than it is in temperate climes, and a See also:case has been recorded in which a man in the See also:West Indies cut his hand on a broken See also:plate at See also:dinner and was dead of tetanus before the See also:day was out . It is easy to see that the germs are more likely to undergo virulent cultivation in warm earth than in See also:cold . It was formerly the See also:custom to speak of idiopathic tetanus—that is to say, of the disease occurring without any wound having been received . But See also:modern teaching is to the effect that there must have been some wound, however slight, by which the germs found entrance . Rheumatic tetanus is as unreal a disease as that just mentioned . The germs themselves do not wander from the wound to multiply in the See also:blood as in infecting diseases, but remaining at the wound elaborate a terribly poisonous substance (a toxin) which makes its way along the See also:nerve-trunks to the See also:spinal See also:cord . Even prompt amputation, however, is likely to prove ineffectual as regards cure, for the germs in the wound have in this growth set See also:free so virulent a See also:poison (toxin) that the nerves of the voluntary muscles all over the See also:body are hopelessly under its See also:influence . The first symptom of the disease is discomfort in the back of the See also:neck; the man waking up in the See also:morning, for instance, complains of " stiff neck " and of obscure pains, and, wonders if he has been lying in a See also:draught . Then the muscles of the See also:jaw and of the See also:face become affected, there being a difficulty opening the mouth, and the corners of the mouth are See also:drawn downwards and backwards, and fixed in that position (risus sardonicus) . The jaw is so firmly set that it is impossible to pass anything between the See also:teeth . All See also:food, therefore, has to be fluid, and being poured into the pouch of the cheek, finds its way into the mouth by the serviceable See also:gap which exists behind the See also:wisdom-teeth . Soon, however, a difficulty in swallowing comes on because of the muscles of the See also:throat being involved . The muscles of the See also:abdomen becoming contracted are rigidly fixed, and on laying the hand upon the front of the abdomen they feel as " hard as a See also:board." The muscles of the limbs'are also attacked with fearful cramps, and, last of all, the muscles of the See also:chest are involved . Though all these muscles are in a continuous See also:state of contraction, spasmodic contractions, as already remarked, come on in addition, and occasionally with such distressing See also:energy that the patient is doubled up forwards, backwards, or sideways, and, may be, some of the muscles See also:tear across . The patient is bathed in See also:perspiration, and sinks worn out and exhausted, or, perchance, slowly suffocated by the locking of the muscles of respiration . As regards the prospect of recovery in tetanus it may be said that when the symptoms break out acutely within a See also:week of the reception of an injury the prospect of recovery is extremely remote . If they occur within ten days the prospects are See also:bad . But if there is an See also:interval of three See also:weeks or a fortnight before their occurrence the case may be regarded more See also:hope-fully . In the treatment of tetanus the first thing to do is to try to make the wound by which infection has taken See also:place surgically clean . For though a wound free from the germs of suppuration may be the incubating place of the bacilli of tetanus, still in most cases there is also an invasion of septic germs, and the See also:double infection makes the See also:action of the tetanic poison the more virulent . If the See also:local conditions are such that it is impossible to cleanse the wound, the free use of the See also:knife or of the cautery or of pure carbolic See also:acid may be resorted to, or an amputation may be performed . But even the See also:early amputation of the infected See also:part may not avail for the See also:reason that the germs in the wound have already set free a lethal dose of their toxin . The wound having been cleansed the further treatment of the disease demands See also:absolute quiet in a darkened See also:room . There must be no slamming of the See also:door, shaking of the bed, or the sudden bringing in of a See also:light, for any See also:act such as this might cause the outbreak of a violent spasm . Morphia may be given by the hypodermic See also:syringe, and if the spasms are causing See also:great See also:distress See also:chloroform may be administered; indeed, in certain severe cases it may be necessary to keep the patient almost continuously under its influence . If there is difficulty in swallowing fluid, rectal feeding must be resorted to . Though at present one is unable to speak enthusiastically or with confidence about the antitoxin treatment of lockjaw, still it is a method which should certainly be given trial—and that early . The tetano-antitoxin is prepared from the blood of animals which have been rendered immune to repeated injections of the poison elaborated by the cultivation of the tetanus bacilli . The bacilli themselves are not injected, the injections being rendered sterile . By passing the sterile injections into one of the See also:lower animals the blood of that See also:animal prepares an antidote to them known as an antitoxin . The antitoxin may be injected into the nerve trunks or into the sheath of the spinal cord or of the brain . But inasmuch as the nerves and the nerve-cells are under the influence of the toxin before the antitoxin is administered—as evidenced by the occurrence of the symptoms—the injection-treatment has but a poor chance of producing a See also:good effect . (E . |
|
|
[back] TESTER (Fr, teetiere, head-covering, from teete) |
[next] TETARTOHEDRAL |
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.