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Antigenic relationships among pathogenic Beauveria bassiana with Engyodontium album (=B. alba) and non-pathogenic species of the genus Beauveria

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Abstract

Exoantigenic extracts of 15 isolates belonging to hyalohyphomycosis-causing Beauveria bassiana (1), and Engyodontium album (1), as well as other species of the genus Beauveria (one isolate each of B. brogniartii, B. densa, B. stephanoderis, B. velata, B. vermiconia and six isolates of unknown Beauveria species) were studied. Aqueous-merthiolated extracts derived from 10-day-old Sabouraud's dextrose agar slant cultures (25 °C) were concentrated (25X), and reacted against rabbit anti-B. bassiana serum in the presence of partially purified homologous antigen (20X) prepared from 5-week-old shaken cultures (30 °C), using a microimmunodiffusion procedure. Beauveria bassiana reference antigen and antiserum reacted to produce four bands of identity. With the exception of E. album, which was negative, extracts of the isolates of B. brogniartii, B. densa, B. stephanoderis, B. velata, B. vermiconia and the unknown Beauveria species all produced 2-4 lines of identity against the homologous anti-B. bassiana serum. These results suggested that all the species of the genus Beauveria tested were antigenically related to B. bassiana. Engyodontium album demonstrated antigenic distinctness, however, from B. bassiana and thus supported the validity of this taxon.

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Authors and Affiliations

  1. Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, AB, T6G 2H7, Canada

    A.S. Sekhon, A.K. Garg, E. Ambrosie & T. Panter

  2. Division of Bacterial and Mycotic Diseases, Mycotic Diseases Branch, Public Health Service, Centers for Disease Control, Atlanta, GA, USA

    A.A. Padhye & L. Kaufman

  3. Eye Research Unit, Emory University School of Medicine, Atlanta, GA, 30322, USA

    L. Ajello

Authors
  1. A.S. Sekhon
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  2. A.A. Padhye
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  3. L. Kaufman
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  4. A.K. Garg
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  5. L. Ajello
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  6. E. Ambrosie
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  7. T. Panter
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Sekhon, A., Padhye, A., Kaufman, L. et al. Antigenic relationships among pathogenic Beauveria bassiana with Engyodontium album (=B. alba) and non-pathogenic species of the genus Beauveria . Mycopathologia 138, 1–4 (1997). https://doi.org/10.1023/A:1006857800920

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  • DOI: https://doi.org/10.1023/A:1006857800920

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