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Widely present as the pneumococcus is, we know well that it is powerless for harm except in unhealthful surroundings. There is another interesting feature of its life history which is of practical importance, and that is, like many other bacilli it is increased in virulence and infectiousness by passing through the body of a patient.

+Average Contagious Period.+ It is a safe general rule, the product of long experience, to consider a person with an untreated syphilis as decidedly infectious for the first three years of his disease, and somewhat so the next two years. The duration of infectiousness may be longer, although it is not the rule.

The cost of salvarsan under present conditions is a burden that few can hope to assume to the extent that modern treatment tends to require, and the slower methods of treatment are more of a tax on the patient's courage and determination, and less effective in preventing the danger of infectiousness, although quite as reliable for cure.

There can be no doubt that a campaign of publicity can do much to control the wholesale spread of infection under war conditions, and we should bend our efforts to it, and to the more substantial work of providing for treatment and the prevention of infectiousness, with as much energy as we devote to the other tasks which preparedness has forced upon us.

Nor would he heal those breaches our sins had made by any other method than by the foolishness of the cross, published by the ignorant and unlearned apostles, to whom he frequently recommends the excellence of Folly, cautioning them against the infectiousness of wisdom, by the several examples he proposes them to imitate, such as children, lilies, sparrows, mustard, and such like beings, which are either wholly inanimate, or at least devoid of reason and ingenuity, guided by no other conduct than that of instinct, without care, trouble, or contrivance.

+Means for Controlling Infectiousness.+ The usual method of controlling a very contagious disease, such as scarlet fever or measles, is to put the patient off by himself with those who have to care for him and to keep others away that is, to quarantine them.

Families in which it later develops that an adopted child was syphilitic should not, however, be needlessly alarmed for their own safety, since, from the standpoint of infectiousness, the late forms of hereditary syphilis are not dangerous to others. The agency from which the child was adopted should assume responsibility for the child if the family cannot meet the situation.

We hear a great deal about the infectiousness of bad things and people are always talking about infectious disease and of corrupting influences in the world and all that sort of thing. Do you suppose the Lord has made this world so that everything that is bad is contagious and everything that is good is not contagious? Are you going to slander the Lord like that?

The silkworm has long been known to be subject to a very fatal and infectious disease called the Muscardine. Audouin transmitted it by inoculation. This disease is entirely due to the development of a fungus, Botrytis Bassiana, in the body of the caterpillar; and its contagiousness and infectiousness are accounted for in the same way as those of the fly-disease.

+Control of Infectiousness by Treatment Importance of Salvarsan.+ In a disease which yields so exceptionally well to treatment as syphilis, a great deal can be done to shorten the contagious period. Especially is this so when we are able to employ an agent such as salvarsan, which kills off the germs on the surface within twenty-four hours after its injection.