Rickets.—We sometimes see, especially in the poorer quarters of a great city, persons dwarfed in stature, with large hands, bowed legs, bent arms, swollen wrists and ankles, walking with an awkward gait, though usually holding themselves remarkably upright, with the face of a grown person on the body of a child, and we know that they suffered from rickets when young.
Rickets is essentially a disease of childhood, and of early childhood, in which proper bone-formation does not take place, the soft material, or gristle, which should turn to bone, remaining long in the soft state. When, therefore, the child begins to walk, or to use its limbs, they bend under the weight of the body, or under their own weight, and with every slight movement which its feeble muscular power enables it to make. It does more, however, than interfere with the hardening of the limbs: it arrests growth to a great degree, interferes with development, retards teething, postpones the closure of the open part of the head, or fontanelle, weakens constitutional vigour, and impairs muscular power. To this feeble muscular power it is due that the child cannot make the effort to fill its lungs completely, and hence the pressure of the external air forces the soft ribs inwards, and gives to the chest the peculiar form of pigeon-breast. In the course of time the delayed bone-formation takes place, and the bones themselves become as hard as ivory, but the limbs do not straighten, and the deformity produced in infancy is but confirmed in after-life.
The greater degrees of rickets are scarcely ever seen among the children of the wealthier classes, but over-crowded and ill-ventilated nurseries, cots from which the air is well-nigh shut out by closed sides and overhanging curtains; injudicious feeding, with undue preponderance of farinaceous food, often produce its slighter forms. I never yet saw rickets in a child while brought up exclusively at its mother's breast.
The slighter forms of rickets show themselves in a tardy closure of the infant's head, which sweats profusely when the child is laid down to sleep; in big wrists, which contrast with the attenuated arms; in a general limpness of the whole body, and a bowing of the back under the weight of the head, which bends as a green stick would bend if a weight were placed upon it. They are further marked by backwardness in teething, and by the irregular order in which the teeth appear, and, further, by the peculiar narrowness of the chest, and by what has been termed the beading of the ends of the ribs: little round prominences due to a heaping up of gristle just where the ribs join on to the breastbone, marking the spots at which the tardy bone-making has come to a standstill.
Children who bear these stamps of rickets are far more apt than others to suffer from spasmodic croup, and in them it is also specially likely to be severe and to be accompanied by convulsions. They will also be more liable than others to attacks of bronchitis, they will suffer more during teething, they will be often constipated, and will be troubled by various forms of indigestion. Now and then, too, they will have causeless attacks of feverishness lasting for a few days, or for two or three weeks, attended with general tenderness of the surface, and a disposition to perspiration, which brings no relief but serves only to weaken.
It is true that these symptoms do not often become immediately dangerous to life, though spasmodic croup and bronchitis both have their perils; but they interfere with health, and growth, and good looks, and cheerfulness, and quick intelligence.
If mothers would but ask themselves the real signification of these symptoms, and change the conditions which surround the child, and alter their mode of feeding it, they would many and many a time be spared the heart-ache of seeing their little ones grow up weakly, ugly, ill-thriven.
Unfortunately, it is so much easier to give cod-liver oil and iron than to turn the best spare room into a night nursery, and to uglify the cot by taking away the curtains which made it so pretty, and to give up some of the pleasures of society in order to superintend the preparation of the baby's food; that the doctor is called in to correct by drugs the evil which drugs cannot reach. Iron and cod-liver oil are very useful in the second place; fresh air, good ventilation, and a wise diet must always occupy the first.
Acute Constitutional Diseases.—It still remains for us to glance rapidly at the characters of the acute constitutional diseases, all of which belong, as has already been stated, to the class of fevers. Of them all but two are contagious—that is to say, are capable of being communicated directly from person to person. They are likewise infectious, or, in other words, articles of bedding or clothes which have been worn by the sick, retain a something—an exhalation from the breath, an emanation from the skin, or a secretion from the bowels—which may reproduce the same disease in a person previously healthy.
To this contagious and infectious property there are two exceptions; the one is furnished by acute rheumatism, or rheumatic fever, the other by intermittent fever, or ague.