No infant in whose mother's family a predisposition to consumption exists ought to be nursed by its mother, but by a healthy wet nurse; or, if that is impossible, it should be brought up on a milk diet, with but a small admixture of farinaceous food.
There is a form of very rapid, or so-called galloping consumption, which is seldom observed before the age of seven years; generally two or three years later. Its symptoms so closely resemble those of typhoid fever, that it may readily be mistaken for it. I refer to it in order to say that the doctor who mistakes the one for the other can scarcely be regarded as blameworthy; and the mistake is of the less importance since the treatment applicable to the one case would do no harm in the other.
I have already noticed the connection between water on the brain and consumption. It is indeed nothing else than inflammation excited by the presence of the deposit of consumptive matter in the brain or its membranes.
Little has been said hitherto about the wasting which was referred to as one of the characteristics of consumption. When the disease is limited, or nearly so, to the lungs, the wasting is not considerable until the mischief in the chest is far advanced. It must be remembered, however, in order to judge of this, that while in the full-grown man the best sign of health is the persistence for years together of the same weight, the case of the child is different. The child ought to grow in height, and increase in weight, and during these changes the plump infant grows thinner, not by real wasting but by conversion of its fat into bone and muscle. The child is thinner, but is taller and weighs heavier. The only real test therefore of the condition of the child is afforded by its increase in height and in weight. One need not be solicitous about the child who increases in height, and maintains his previous weight, nor about him who while he does not grow yet becomes heavier; but the child who neither gains in weight, nor in height, or who loses weight out of proportion to his increased height, is in a condition that warrants anxiety. I have long been accustomed, in the case of children whose parents were resident in India, to instruct those who have charge of them to send every three months a statement of the height and weight of the children, as the best evidence of their state of health.