The genito-urinary tract furnishes a portal of entrance into the body for such germs as those of gonorrhea, syphilis and tuberculosis, either by direct contact or through intermediary agents. Infection of the body is by means of some of these entry channels which differ with the different bacteria. The bacteria may be entirely innocent when entering one part of the body, yet when they enter through some other portal they may be considered pathogenic. In other words, some germs will thrive in one part of the body but not in some other part. Terms Infectious and Contagious The terms infectious and contagious are not clearly defined and have no scientific precision. “A contagious (contigere, to touch) dis-ease is one that is readily communicable—in common parlance, ‘catching.’ Formerly a contagious dis-ease was considered as one which is caught from another by contact, by the breath or by effluvia. A contagious dis-ease implies direct or personal contact. If contagious dis-eases are limited to those contracted by direct contact or touch, as the etymology of the word signifies, only syphilis and dis-eases similarly contracted would be contagious. As a matter of fact, smallpox, measles and influenza are types of contagious dis-eases, and the term is now usually understood.” “An infectious (inficere, to put in, dip in, or mix in) dis-ease is usually considered as one not conveyed directly and obviously, as in the case of contagion, but indirectly through some hidden influence or medium. In the days when specific febrile dis-eases were regarded as caused by miasmata and noxious effluvia, the term ‘infectious’ and ‘miasmatic’ dis-eases were more or less synonymous. Typhoid fever was often taken as a type of an infectious dis-ease. Malaria was the type of miasmatic dis-ease.” (Rosenau, _Preventive Medicine and Hygiene_.) Most authors consider that an infectious dis-ease may be contagious and a contagious dis-ease is also infectious. Contagion implies more of a personal contact as a mode of transfer, while infection implies more of an indirect mode. The communicable is more specific, but does not refer to any particular mode of transference. There are many so-called communicable dis-eases, yet let it ever be remembered that if Innate Intelligence is operating at par in the body there will be an immunity from these dis-eases, although the germs that are supposed to cause them will still exist. CHAPTER XIII DISINFECTION AND FUMIGATION DISINFECTION AND FUMIGATION DEFINITIONS DISINFECTION STERILIZATION ANTISEPTIC INSECTICIDE ASEPSIS GERMICIDE DEODORANT FUMIGATION FORMALDEHYDE SULPHUR DIOXIDE MEANS OF DISINFECTION NATURAL MEANS DILUTION DESICCATION SUNLIGHT TIME ANTIBOSIS OTHER AGENTS FIRE DRY HEAT BOILING STEAM