The observations and the results after allogenic lung transplantation in 24 receivers were reported. The animals were not treated immuno-suppressively. They survived 6.2 days on an average and died in consequence of the rejection. The transplant is progressively threatened of bacterial infections after the beginning of the rejection even in case of an operation under sterile conditions. The investigations confirmed a narrow correlation between the leucocyte count and the course of the rejection. However, the condition of the transplant can be estimated approximately certainly by means of complex clinical methods of examination.
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