So full is the blood of the parasites, that they may actually choke up the tiny blood-vessels and capillaries in various organs, so as to block the circulation and cause serious and even fatal congestions. Obstructions of this sort may occur in the brain, the liver, the coats of the stomach, or intestines, and the kidneys; and they are the chief cause of the deadly "congestive chills," or pernicious malarial paroxysms, which we have alluded to.
The kidneys are particularly liable to be attacked in this way; indeed, one of their involvements is so serious and fatal in the tropics as to have been given a separate name, "Blackwater fever," from the quantities of broken-down blood which appear in and blacken the urine.
The vast majority of attacks of malaria are completely recovered from, like any other infection, but it can easily be seen what an injurious effect upon the system may be produced by successive attacks, keeping the entire body saturated with the poison; while there is serious risk of the parasite sooner or later finding some weak spot in the body,—kidney, liver, nervous system,—where its incessant battering works permanent damage.
How long the infection may lurk in the body is uncertain; certainly for months, and possibly for years. Many cases are on record which had typical chills and fever, with abundance of plasmodia in the blood, years after leaving the tropics or other malarious districts; but there is often the possibility of a recent re-infection.
Altogether, malaria is a remarkably bad citizen in any community, and its stamping-out is well worth all it costs.
CHAPTER XIV
RHEUMATISM: WHAT IT IS, AND PARTICULARLY WHAT IT ISN'T
What's in a name? All the aches and pains that came out of Pandora's box, if the name happens to be rheumatism. It is a term of wondrous elasticity. It will cover every imaginable twinge in any and every region of the body—and explain none of them. It is a name that means just nothing, and yet it is in every man's vocabulary, from proudest prince to dullest peasant. Its derivative meaning is little short of an absurdity in its inappropriateness, from the Greek reuma (a flowing), hence, a cold or catarrh. It is still preserved for us in the familiar "salt rheum" (eczema) and "rheum of the eyes" of our rural districts. But this very indefiniteness, absurdity if you will, is a comfort both to the sufferer and to the physician. Moreover, incidentally, to paraphrase Portia's famous plea,—
It blesseth him that has and him that treats;
'T is mightier than the mightiest.
It doth fit the thronéd monarch closer than his crown.