1921
Volume 12, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645
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Abstract

Summary

A number of skin test antigens prepared by several methods from cercariae and adults of were analyzed for polysaccharide content by the anthrone method and nitrogen content by Nessler and micro-Kjeldahl methods. No correlation between nitrogen and polysaccharide content of the antigens was observed. Antigens prepared in different laboratories and adjusted to approximately similar nitrogen content gave comparable wheal areas when injected into the skin. The polysaccharide content of these antigens varied from 23 to 114 gamma per ml. It was concluded that polysaccharide content was an unreliable indicator of the activity of these skin test antigens.

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/content/journals/10.4269/ajtmh.1963.12.179
1963-03-01
2017-11-23
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