Volume 8, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



The polarographic method for oxygen was applied to the problem of aerobiasis-anaerobiasis in echinococcosis to show that:

  • 1.  The dissolved oxygen content of fluids of 3 hydatid cysts of the bovine lung ranged from 2.80 to 3.12 mm per ml, of 7 hydatid cysts of the bovine liver from 1.28 to 2.28 mm per ml.
  • 2.  The of hydatid scolices decreased with environmental oxygen tension until at a tension of 0.80 ± 0.48 mm per ml the rate became and remained zero.
  • 3.  The polarographic at an oxygen tension representing hydatid cyst fluid saturated with air (“optimum rate”) ranged from 0.39 to 1.50 (0.85 ± 0.39).
  • 4.  The at the in vivo oxygen tension of lung cysts was 96 per cent and of liver cysts 54 per cent of the mean “optimum rate.” It would appear therefore that hydatid scolices are able to carry on predominantly aerobic metabolism in vivo.
  • 5.  Hydatid scolices possibly repay an accumulated oxygen debt following anaerobic incubation.


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