Maryland medical journal . ng upon a diagnostic focal reac-tion in the beginning? In cases three and four this course pro-duced splendid therapeutic results. If it be argued that we arenot sure of the diagnosis and the course is tedious, I would saythat, even so, it is better than damaging vision by diagnostic the two cases benefited by tuberculin, one has remained well,while the other shows tendency to relapse when without thevaccine. It seems that tuberculin, short of curing, can supply anincreased resistance; that the patient misses it, and it may be ourduty to supply it by small do
Maryland medical journal . ng upon a diagnostic focal reac-tion in the beginning? In cases three and four this course pro-duced splendid therapeutic results. If it be argued that we arenot sure of the diagnosis and the course is tedious, I would saythat, even so, it is better than damaging vision by diagnostic the two cases benefited by tuberculin, one has remained well,while the other shows tendency to relapse when without thevaccine. It seems that tuberculin, short of curing, can supply anincreased resistance; that the patient misses it, and it may be ourduty to supply it by small doses for an indefinite period. Theobold Smith says: * * * all parasites * * inducein the body of the host a degree of antagonism higher than thatexisting before the invasion. This antagonism may not be suf-ficient to eliminate the parasites; it may not even be strongenough to check the march of invasion and the progressive dis-ease resulting therefrom; it may even, in some of its stages, be TUBERCULIN IN UVEITIS—Woods i53. 154 MARYLAND MEDICAL JOURNAL JUNE, 1917 injurious to the host * * * In a body already infected withsome other virus living vaccines may co-operate with this virusand become pathogenic for that individual. * * * Localizedbacterial infections are processes toward which the human bodyin general possesses a high degree of natural resistance. * * *It is impossible to separate the toxic from the immunizing prod-uct. Finally, he says: In conclusion, let me briefly summarizethe points to be emphasized. All parasites tend to increase theresistance of the host in which they live and multiply. Out ofthis universal fact a number of practical problems arise. In anygiven disease is it worth while to try to raise the immunity, andhow much energy will it cost the patient? If worth while, whatis the best and most sparing way of raising such immunity artifici-ally? In any localized infection we must ask, Is this a beginningprocess without an attendant immunity, or is it a res
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