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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ammons, David R. Reyna, Antonio Granados, Jose Cristobal Samlal, Michael S. Rampersad, Joanne N. |
| Copyright Year | 2009 |
| Abstract | In order to better understand the range and role of Bacillus thuringiensis (Bt) and its toxins in nature, we have undertaken a study of Bt taken directly from the rectum of 117 cows from 37 farms on the Caribbean island of Trinidad. Thirty-seven fecal samples (32%) were found to contain at least one Bt. Generally only one or two isolates with a particular crystal morphology were isolated from any one sample, however, a few samples contained more, up to 11 isolates, suggesting post-ingestion amplification. Bioassays using larvae of Musca domestica, Caenorhabditis elegans and Tetrahymena pyriformis showed no observable toxicity in gross bioassays. Very small dot-like parasporal bodies, not generally characteristic of Bt, were isolated from 44% of the samples, which in many instances appeared unstable and whose relation to Bt Cry protein-containing parasporal bodies is unknown. In conclusion, we find little evidence for a host adapted strain of Bt in the cows examined, nor toxicity to organisms that might logically be associated with either the cow or its feces. The presence of a large number of isolates containing small dot-like parasporal bodies, possibly either poly-β-hydroxybutyrate storage bodies or Cry proteins, was unexpected and merits further investigation. |
| Starting Page | 532 |
| Ending Page | 536 |
| Page Count | 5 |
| File Format | |
| ISSN | 03438651 |
| Journal | Current Microbiology |
| Volume Number | 59 |
| Issue Number | 5 |
| e-ISSN | 14320991 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2009-08-18 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Biotechnology Microbiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Microbiology Applied Microbiology and Biotechnology |
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