Schick Test Amongst a Group of Indians and Anglo-Indians in Calcutta
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چکیده
other parts of the world. Certain workers have recorded that this antitoxic immunity to diphtheria was more marked amongst the local ^habitants than in European children living in same place. That this difference in anti?xic immunity is not a result of any racial Peculiarities but the result of environmental c?nditions has been well shown in a critical i^rvey of the literature bv Dudley (1929) and JY?idl (1930). These and other workers have ^hown that age, race, social conditions or nutrilQn have in themselves very little or no influence ?n Naturally-acquired antitoxic immunity except so far as they influence the contact between ^an and the diphtheria bacilli. The develop^ent of antitoxic immunity is not due to Physiological processes dependent 011 race or Sgj but to the response 011 the part of the body to stimuli received by contacts with diphtheria bacilli and their products. Amongst the wellto-do classes the chances of contact with diphtheria bacilli are considerably less than in the poorer and more densely populated parts of big towns. In India, as in other tropical countries, although the prevalence of clinically recognizable forms of diphtheria is very much lower than in temperate climates, the antitoxic immunity has been shown to be much higher. Fox, McDonald and McCombie Young (1923) were the first to carry out a Schick-test survey in India amongst 265 European children and 6 adults from three schools in Shillong during an outbreak of diphtheria. Rambo (1929) recorded the result of 193 tests in Indians in Mangeli, Bilaspur district, Central Provinces, and Das (1934) carried out a Schick test on 284 Indians in Naini Tal district. The results obtained by these three workers are summarized in table I.
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