Climate and Health in Hot Countries and the Outlines of Tropical Climatology / A Popular Treatise on Personal Hygiene in the Hotter Parts of the World, and on the Climates That Will Be Met Within Them.

by George Michael James Giles

They are usually dark grey, flattened insects, with a peculiarly hard integument, which forms so efficient a protection against injury that, if merely squeezed between the fingers, they will commonly fly away in a perfectly unconcerned manner. The easiest way to dispose of them is to knock the insect down with the whisp of horsehair mounted on a cane, commonly carried by horsemen when flies are troublesome, and then to crush it under the boot, giving the foot a good twist, so the wound, like that of the sergeant-instructor’s bayonet, may be “made incurable.”

The general appearance of these insects may be best gathered from the above magnified [figure].

It is obvious that as far as our knowledge extends, the prevention of sleeping sickness is purely a matter of avoiding being bitten by insects of this sort, and it is also clear that as far as indoor life is concerned, the adoption of metallic gauze protection of the house will be as effectual as it is in the case of malaria. These flies are, however, mainly forest insects, and watchfulness, especially when sitting out of doors, is all that can be suggested. Personally, if bitten by one of these flies in a country where sleeping sickness exists, I should be strongly inclined to destroy the bit of tissue around the bite by means of some powerful caustic, such as pure carbolic acid dropped into a small cut at the site of the puncture, for as yet no instance of recovery from the disease has ever been met with, and in all probability this measure, if done with tolerable promptitude, would probably suffice to destroy the germs before they gained access to the general circulation.

Sunstroke and Heat Apoplexy.

The disturbances of the nervous system that are grouped under the above heads vary a good deal, and probably comprise several different diseases, with as many distinct causations.

It is a curious fact that sunstroke is practically unknown on the high seas, and in certain countries, notably in South Africa, where the fierceness of the sun would naturally lead one to expect to commonly meet with it; and this circumstance, and the fact that something like epidemics of the disease are occasionally met with, lend a certain amount of probability to the idea held by certain authorities, that, in one form at least, the malady belongs to the category of germ-caused diseases.

The symptoms of the disease are insensibility, combined with a greater or less elevation of temperature, and a large proportion of the cases that one hears of are merely instances of fainting, due to fatigue and exhaustion from heat. Such cases are specially common where large bodies of men are massed together, and have to undergo great exertion under unsuitable atmospheric conditions, and where, besides being hot, the air is foul with dust and the emanations of the closely packed animals and men, whose sufferings are often aggravated by thirst and the restricted possibility of evaporation from the surface of the skin that is inseparable from an inadequate supply of water; while the free play of the lungs and heart are too often impeded by the unsuitable and fantastic garments and equipments so dear to the infantile genius of militarism.

Fainting is due to a sudden weakening in the action of the heart, and in a certain number of cases of “sunstroke” of this sort, the mischief goes beyond enfeeblement, the heart stops, and the man is dead. Most of the cases of sudden death from “sunstroke” that occur on hot “field-days,” as well as in military operations undertaken in earnest, are probably of this character; and even when the heart has not absolutely stopped, its action may be so feeble and fluttering that the insensibility is prolonged and serious. The temperature of the body is, however, only moderately raised, and when, under proper treatment, the patient has regained consciousness, he soon recovers if permitted to rest, and in a day or two may be little the worse for his adventure. In cases of this sort all clothing and equipment should at once be loosened or removed, and the patient should be given the full benefit of what “air” there is to get. Hence, it is of the first importance to prevent sympathetic onlookers from crowding round him in a ring. The chest and face should be freely soused with water, and when the patient is able to swallow, a little stimulant may be administered.

Some kind of shade should be improvised, at any rate over the head, but no attempt should be made to move the patient till the pulse can again be plainly felt, after which he should be placed on some sort of stretcher and removed as quickly as possible to shade and comfort, where he will probably speedily recover, for though “sunstroke” of this sort is a highly dangerous condition while it lasts, it is rare for it to be followed by any serious after-effects.

Cases of this sort are comparatively rare in civil life, the conditions which lead to them being usually wanting; for it will be noticed that even the military officer takes the greatest care not to be “smart” when he goes out shooting under a tropical sun, his costume, when so engaged, being generally a model of the way he and his men ought to be equipped when engaged in the business of their profession.