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Related Experiment Videos

Pathological studies in experimental Candida endocarditis.

Y Al-Doory, L H Paasch, B C Zook

    Japanese Heart Journal
    |July 1, 1979
    PubMed
    Summary

    This study demonstrates how Candida albicans causes mycotic endocarditis in rabbits using catheters. It details the resulting cardiac lesions and sterile endocardial damage from retained catheters.

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    Area of Science:

    • Cardiology
    • Mycology
    • Pathology

    Background:

    • Catheter-associated infections pose a significant clinical challenge.
    • Fungal endocarditis, particularly Candida albicans, is a serious complication.

    Purpose of the Study:

    • To investigate the pathological changes associated with Candida albicans-induced mycotic endocarditis in a rabbit model.
    • To differentiate fungal endocardial lesions from sterile lesions caused by indwelling catheters.

    Main Methods:

    • Indwelling intracardiac catheters filled with Candida albicans suspension were used to induce mycotic endocarditis in rabbits.
    • Control rabbits had sterile catheters inserted to create sterile endocardial lesions.
    • Gross and microscopic pathological examinations were performed on cardiac tissues.

    Main Results:

    • Candida albicans induced massive fungoid valvular vegetations and sleeve thrombi around catheters.
    • Microscopically, platelet-fibrin aggregates, neutrophylic collars with Candida cells, and subendothelial infiltration were observed.
    • Sterile endocardial lesions presented as nodules and plaques composed of fibrous connective tissue without inflammatory cells.

    Conclusions:

    • Candida albicans forms characteristic vegetations and inflammatory responses in mycotic endocarditis.
    • Retained catheters alone can induce sterile, fibrotic endocardial lesions.
    • This model effectively differentiates fungal from sterile catheter-induced cardiac pathology.

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