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Post by chaosonline on Feb 5, 2009 15:19:09 GMT -5
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Post by felixwillford on Feb 5, 2009 15:21:29 GMT -5
Is today your Birthday Karen?
If so,..............HAPPY BIRTHDAY!
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Post by felixwillford on Feb 5, 2009 15:24:57 GMT -5
Great article....................
it says people have a 85.46% chance of being misdiagnosed with Pseudomonas oryzihabitans instead of the Photorhabdus!
Photorhabdus spp. have never been shown to live freely in soil, although they will survive in soil under laboratory conditions (8). Photorhabdus spp. have only been isolated naturally from two nonclinical sources: insect-pathogenic nematodes (Heterorhabditis spp) and the insects they parasitize (beetles, moths, and the like). It seems likely therefore that Photorhabdus spp are transmitted to humans by a terrestrial invertebrate (nematode or arthropod), but that vector has not yet been identified.
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Post by felixwillford on Feb 5, 2009 15:34:27 GMT -5
www.ncbi.nlm.nih.gov/pubmed/10892346?dopt=AbstractFROM MAY 2000............ 9 years ago.....no telling what has been out there since for us to absorb. Department of Biology and Biochemistry, University of Bath, United Kingdom. bssrfc@bath.ac.uk The current strategy of using transgenic crops expressing insecticidal protein toxins is placing increasing emphasis on the discovery of novel toxins, beyond those already derived from the bacterium Bacillus thuringiensis. Here we review the cloning of four insecticidal toxin complex (tc) encoding genes from a different bacterium Photorhabdus luminescens and of similar gene sequences from Xenorhabdus nematophilus. Both these bacteria occupy the gut of entomopathogenic nematodes and are released into the insect upon invasion by the nematode. In the insect the bacteria presumably secrete these insecticidal toxins, as well as a range of other antimicrobials, to establish the insect cadaver as a monocultural breeding ground for both bacteria and nematodes. In this review, the protein biochemistry and structure of the tc encoding loci are discussed in relation to their observed toxicity and histopathology. These toxins may prove useful as alternatives to those derived from B. thuringiensis for deployment in insect-resistant transgenic plants.
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Post by chaosonline on Feb 5, 2009 15:50:49 GMT -5
Yep Kmarie I'm a year older & none the wiser.... But check out these pics: Gastrotrich: tinyurl.com/dgyyykBioluminescence Photorhabdus: tinyurl.com/bjhgg5By the way I have to credit Ladycolorado for finding the CDC article entitled 'Bioluminescent Bacteria as Emerging Human Pathogens?' Karen
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Post by lilsissy on Feb 5, 2009 19:27:27 GMT -5
They use this as a biosensor too. www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000200001Microbiology but have also shed light into areas of ecological, industrial and medical significance. The elucidation of luciferase genes regulation permitted the discovery of intercellular communication among bacteria. This, in turn, has led to a better understanding of bacterial pathogenesis and the associations of microorganisms in the environment. With the advent of molecular biology, it has been possible to construct bioluminescent bacteria that are naturally dark by insertion of lux genes. This paper illustrates how this has impacted new areas of research and biotechnological applications using luminescent systems as environmental biosensors.and www.wipo.int/pctdb/en/wo.jsp?IA=WO2004042010&DISPLAY=DESC
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Post by felixwillford on Feb 17, 2009 11:04:19 GMT -5
Thank you Lady Colorado!
Can Always count on you to be on top of things for us!
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Post by toni on Feb 17, 2009 11:16:14 GMT -5
The three currently recognised Photorhabdus species are bioluminescent bacteria that are pathogenic to insects. P. luminescens and P. temperata form a symbiotic relationship with nematodes that infect insects. P. asymbiotica, on the other hand, has only been isolated from human clinical specimens from the USA and Australia. The bacterium has been associated with locally invasive soft tissue and disseminated bacteraemic infections. An invertebrate vector for P. asymbiotica has not yet been identified. www.ncbi.nlm.nih.gov/pubmed/15049334
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Post by lilsissy on Feb 17, 2009 15:32:09 GMT -5
Good article, tinyurl.com/b77ebqA list of bioluminescent organisms. Notice one fungus is also mentioned honey fungus Aequorea victoria Anglerfish Arachnocampa B Bathocyroe fosteri Black swallower Bolitaenidae C Chain catshark Colossal Squid Cookiecutter shark Ctenophore F Firefly Flashlight fish G Gigantactis G cont. Glowworm H Honey fungus K Krøyer's deep sea angler fish L Largetooth cookiecutter shark Luminescent bacteria M Midshipman fish Monocentridae N Noctiluca scintillans O Omphalotus nidiformis Omphalotus olearius Orfelia fultoni P Phengodidae Photobacterium Photobacterium phosphoreum P cont. Praya dubia Pyrophorus (beetle) Pyrosome R Railroad worm Rhagophthalmidae S Sea pansy Sea pen South China cookiecutter shark Sparkling Enope Squid V Vibrio fischeri Vibrio harveyi Vibrionaceae W Whip-lash squid Whipnose angler
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