. Medical diagnosis for the student and practitioner. Fig. 486.—Making smear. ( or less). In the former one deals with a localized or shut-off process,in the latter with a blood-stream infection. In cases where the infection is but imperfectly or intermittently shutoff, as in certain cases of advancing pulmonary tuberculosis or tuberculous INFECTION AND IMMUNITY 999 joints, the index may show marked variations. For diagnostic purposesthe T. R. is used in the usual manner in the case of tuberculosis and theresulting phases as previously described give to some extent, diagnostic,prognostic, a
. Medical diagnosis for the student and practitioner. Fig. 486.—Making smear. ( or less). In the former one deals with a localized or shut-off process,in the latter with a blood-stream infection. In cases where the infection is but imperfectly or intermittently shutoff, as in certain cases of advancing pulmonary tuberculosis or tuberculous INFECTION AND IMMUNITY 999 joints, the index may show marked variations. For diagnostic purposesthe T. R. is used in the usual manner in the case of tuberculosis and theresulting phases as previously described give to some extent, diagnostic,prognostic, and therapeutic indications. Measuring the Dose of the Vaccines.—As it is necessary to use an exactor approximately correct dosage of any given germ, various procedureshave been devised. One of the simplest consists in preparing an emulsion. Fig. 487.—Smear. of the germs with salt solution and making a mixture consisting of 1 partof the germ solution, 1 part normal blood and 3 parts of salt solution. Acount will determine the number of corpuscles and the proportion of germsto blood corpuscles and hence the number of germs per cubic 100,000,000 to five or ten times that quantity may be required to main-tain the highest and most sustained positive phase, together with theminimum extent and duration of negative phase which is the therapeuticoptimum. IOOO MEDICAL DIAGNOSIS Endemic. Seasonalincidence. Character-istics. Eberthsbacillus. Fulfills Kochlaw. Vitality ofgerm. Water and ice Soil Modes ofconveyance. Chroniccarriers. Green salads. Oyster beds. The urine amenace. THE INFECTIOUS DISEASESTYPHOID FEVER {Enteric Fever, Typhus Abdominalis) Definition.—This acute general infection is endemic rather than epidemic, isespecially frequent in the late summer and early autumn, rarely affects babes, ismost preval
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdiagnos, bookyear1922
