Volume 23, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



The antigens for the -specific arc 5 were found in 40 of the 42 hydatid cyst fluid (HCF) pools obtained from the lungs and liver of sheep by the immunoelectrophoresis (IEP) test using sheep and rabbit antisera to HCF. The criteria for the selection of antigens for the diagnosis of human hydatidosis by the IEP test are reviewed in the light of this finding. Sheep antisera to ovine HCF did not show antibody activity to the host contaminants in HCF. The value of such an antiserum for the isolation of the antigens in HCF, and in immunologic and phylogenetic studies of parasites and its application as a reference serum for the IEP test for human hydatid disease are discussed.


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