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| Content Provider | PubMed Central |
|---|---|
| Author | Westlake, K. Dutton, M. F. Mackie, R. I. |
| Abstract | The effect of T-2 toxin on the growth rates of different bacteria was used as a measure of its toxicity. Toxin levels of 10 micrograms/ml did not decrease the growth rate of Selenomonas ruminantium and Anaerovibrio lipolytica, whereas the growth rate of Butyrivibrio fibrisolvens was uninhibited at toxin levels as high as 1 mg/ml. There was, however, a noticeable increase in the growth rate of B. fibrisolvens CE46 and CE51 and S. ruminantium in the presence of low concentrations (10 micrograms/ml) of T-2 toxin, which may indicate the assimilation of the toxin as an energy source by these bacteria. Three tributyrin-hydrolyzing bacterial isolates did not grow at all in the presence of T-2 toxin (10 micrograms/ml). The growth rate of a fourth tributyrin-hydrolyzing bacterial isolate was unaffected. B. fibrisolvens CE51 degraded T-2 toxin to HT-2 toxin (22%), T-2 triol (3%), and neosolaniol (10%), whereas A. lipolytica and S. ruminantium degraded the toxin to HT-2 toxin (22 and 18%, respectively) and T-2 triol (7 and 10%, respectively) only. These results have been explained in terms of the presence of two different toxin-hydrolyzing enzyme systems. Studies with B. fibrisolvens showed the presence of a T-2 toxin-degrading enzyme fraction in a bacterial membrane preparation. This fraction had an approximate molecular weight of 65,000 and showed esterase activity (395.6 mumol of p-nitrophenol formed per min per mg of protein with p-nitrophenylacetate as the substrate. |
| Starting Page | 587 |
| File Format | |
| ISSN | 10985336 |
| e-ISSN | 10985336 |
| Journal | Applied and Environmental Microbiology |
| Issue Number | 3 |
| Volume Number | 53 |
| Language | English |
| Publisher Date | 1987-03-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Food Science Applied Microbiology and Biotechnology Biotechnology |
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