tag:blogger.com,1999:blog-8441491750914005356.post6109387174642698907..comments2023-06-16T12:27:49.821+01:00Comments on Microbes Rule the Waves - 2013: Effects of the dinoflagellate Alexandrium minutum and its toxin (saxitoxin) on the functional activity and gene expression of Crassostrea gigas hemocytesUnknownnoreply@blogger.comBlogger4125tag:blogger.com,1999:blog-8441491750914005356.post-54782533734042174672014-02-13T15:02:03.736+00:002014-02-13T15:02:03.736+00:00Seems a reasonable assumption, depending on the pa...Seems a reasonable assumption, depending on the parameters that are suppressed. On this case where phagocytosis is reduced this applies to any invading pathogen so the build up of other species could well follow though interspecific competition between pathogens would have to be considered, perhaps the saxitoxin would have some effect on, for example Vibrio vulnificans. Either way you would hope that the presence of STX would be detected and the stock removed from the supply chain before consumption so hopefully no pathogens would reach the consumer. You'd hope.Anonymoushttps://www.blogger.com/profile/08280730274629709918noreply@blogger.comtag:blogger.com,1999:blog-8441491750914005356.post-30555873049836117102014-02-10T15:33:18.267+00:002014-02-10T15:33:18.267+00:00By suppressing bivalve immune systems, could harmf...By suppressing bivalve immune systems, could harmful dinoflagellates be setting the scene for pathogens such as Vibrio vulnificus to persist in these molluscs, increasing the chance of other types of shellfish poisoning?Anonymoushttps://www.blogger.com/profile/14950879543695501526noreply@blogger.comtag:blogger.com,1999:blog-8441491750914005356.post-82131458033633763442014-01-29T21:13:05.200+00:002014-01-29T21:13:05.200+00:00The STX was added to pools of haemolymph maintaine...The STX was added to pools of haemolymph maintained in vitro i.e. in a test tube or similar vessel. I did think that perhaps in the time it takes to produce significant levels of toxin (similar to that which has the negative effect) the oysters may have already rid themselves of the dino's or maybe are constantly removing the alga meaning an effective STX concentration is never reached.<br />Anonymoushttps://www.blogger.com/profile/08280730274629709918noreply@blogger.comtag:blogger.com,1999:blog-8441491750914005356.post-84459052354624172862014-01-29T12:04:56.205+00:002014-01-29T12:04:56.205+00:00I always wondered what effects these toxins must h...I always wondered what effects these toxins must have on the algae bloom feeding shellfish; this study sounds very interesting. As you mentioned, the immune response is dramatically restricted by the toxin if introduce directly, but it still appears that the bivalve is able to cope. Since the dinoflagellates are ingested by the oysters, it could be possible that the animals may have associated gut bacteria that can degrade the toxin/dinoflagellates of some kind and or may be aid the host by the eliminating other pathogenic bacteria/viruses that could harm the oysters even more. Do you know where the authors have introduced the stx to the oysters in this study? May be the response of the host is more extreme depending on the tissues where they are introduced to?Malin Tietjenhttps://www.blogger.com/profile/13381694594300204380noreply@blogger.com