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| Content Provider | PubMed Central |
|---|---|
| Author | Howard, D. H. |
| Abstract | The comparative sensitivity of blastospores and conidiospores of Histoplasma capsulatum to hydrogen peroxide, to hydrogen peroxide and halides, and to a combination of hydrogen peroxide and halide with the enzyme myeloperoxidase was studied. Blastospores of different strains of H. capsulatum varied in their sensitivity to hydrogen peroxide. This variation correlated with the amount of catalase in cell-free extracts from the strains. Blastospores and conidiospores of a single isolate were about equally susceptible to hydrogen peroxide, but this sensitivity could obviously vary with the catalase content of the two types of spores. Halides augmented the antifungal activity of hydrogen peroxide for both types of spores. Iodide was far more efficient in this regard than was chloride. A crude granule lysate from guinea pig polymorphonuclear leukocytes was quite inhibitory to blastospore but not to conidiospore germination. A study of the myeloperoxidase activity of such preparations against blastospores was thus precluded. A sample of a very highly purified human myeloperoxidase functioned in the presence of hydrogen peroxide and either iodide or chloride to prevent germination of both blastospores and conidiospores. The preparation had no toxicity for spores apart from its interaction with hydrogen peroxide and halides. |
| Starting Page | 381 |
| File Format | |
| ISSN | 10985522 |
| e-ISSN | 10985522 |
| Journal | Infection and Immunity |
| Issue Number | 1 |
| Volume Number | 32 |
| Language | English |
| Publisher Date | 1981-04-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Parasitology Immunology Microbiology |
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