Volume s1-26, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Summary and Conclusions

  • 1.  One or more attempts were made to transmit foreign by to each of 186 men. Of the 151 white patients, 94.7 per cent were infected. Of the 35 Negro patients, 31.4 percent were infected. On the first attempt, 92.1 per cent of the white patients and 28.6 per cent of the Negroes became infected.
  • 2.  When the same strains were tested against both, white patients were more readily infected than Negro patients in a ratio of 3.6 to 1.
  • 3.  The malarias tried originated from widely separated areas of the world and all showed a high rate of infectivity to white patients. The Negro seemed to have a general resistance to from all areas rather than to strains from particular areas only.
  • 4.  In 3 white cases, a recent infection with the St. Elizabeth strain of did not prevent the development of foreign strains of . This indicated that little or no immunity was gained from the former strain. Should this be true for all American strains, the white population of this country could be considered as non-immune to foreign malarias.


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