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A study of experimental endocarditis in pigs.

H A Dewar1, M R Jones, S G Griffin

  • 1Royal Victoria Infirmary, Newcastle upon Tyne, U.K.

Journal of Comparative Pathology
|September 1, 1987
PubMed
Summary

Pigs exhibit increased susceptibility to bacterial endocarditis due to low systemic fibrinolytic activity and platelet resistance to prostacyclin, complicating therapeutic studies.

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Area of Science:

  • Cardiovascular research
  • Hematology
  • Infectious disease modeling

Background:

  • Bacterial endocarditis is a serious condition that can affect humans and animals.
  • Pigs serve as a potential model for studying endocarditis due to disease similarities.
  • Systemic fibrinolytic activity in pigs is typically low and can be influenced by various factors.

Purpose of the Study:

  • To investigate fibrinolytic therapy for experimental streptococcal endocarditis in pigs.
  • To evaluate pig platelet response to prostacyclin compared to human platelets.
  • To understand factors contributing to pig susceptibility to bacterial endocarditis.

Main Methods:

  • Induction of experimental streptococcal endocarditis in pigs via aortic valve damage.
  • Assessment of fibrinolytic activity modulation in pigs.
  • Evaluation of adenosine diphosphate (ADP)-induced platelet aggregation response to prostacyclin in pigs versus humans.

Main Results:

  • Experimental endocarditis in pigs presented a protracted course, mimicking human disease.
  • Pig platelets demonstrated approximately 10-fold greater resistance to prostacyclin compared to human platelets.
  • Proposed fibrinolytic therapy studies in pigs were halted due to technical challenges with blood sampling and infusions.

Conclusions:

  • Technical difficulties in pig models hindered fibrinolytic therapy research.
  • Pig platelet resistance to prostacyclin and low fibrinolytic activity may underlie their susceptibility to bacterial endocarditis.
  • Further research is needed to overcome model limitations and explore therapeutic strategies.

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