Navigation Links
Lifestyle of a killer
Date:9/6/2012

Parasitic dinoflagellates of the genus Hematodinium are a big problem for crab, prawn and shrimp fisheries across the world. New research published in BioMed Central's open access journal Aquatic Biosystems has found that, in wild European brown shrimp (Crangon crangon), these parasites have bacteria-like endosymbionts. The presence of these endosymbionts indicates a previously unknown side to the lifecycle of Hematodinium.

Hematodinium sp. and its sister species H. Perezi are a real problem for blue crab fishers , causing 'bitter crab' disease, and are thought to be responsible for the decline of blue crabs in Chesapeake Bay. But they are not fussy. Over 40 species of crustaceans are known to be infected by these nasty parasites.

A collaboration between researchers at the European Union Reference Laboratory for Crustacean Diseases (CEFAS) and the Virginia Institute of Marine Sciences (VIMS) identified the parasite responsible for causing sickness in wild European brown shrimp, collected from the North Sea, as Hematodinium sp.. These shrimp had lost carapace transparency and their blood (haemolymph) had lost the ability to clot. The invading Hematodinium had also infiltrated the muscles, destroyed internal organs, and the infection had damaged the shrimp's ovaries, affecting their ability to reproduce. Adding insult to injury the shrimp were also infected with Crangon crangon bacilliform virus (CcBV).

Further investigation revealed that two of the lifestages of the parasite were present in these shrimp, trophont (the adult, mobile stage) and dinospore (the infectious stage). However, for the first time, the dinospores were themselves seen to be infected with bacteria-like cells both in the cytoplasm and inside the nucleus.

Dr Grant Stentiford from Cefas explained, "The symbionts inside Hematodinium sp. appeared to make no difference to the ability of the parasite to infect shrimp. However, for these relationships to survive the endosymbiont must supply an evolutionary advantage. It seems most probable that the endosymbiont in some way increases the chance of the dinoflagellate to survive outside the shrimp, and successfully transfer to a new host. One of the problems with Hematodinium infection is that we do not yet fully understand their lifecycles. The role of this endosymbiont to its survival may be the key to controlling infections in species of farmed crustaceans."


'/>"/>
Contact: Hilary Glover
hilary.glover@biomedcentral.com
44-020-319-22370
BioMed Central
Source:Eurekalert  

Related biology news :

1. Childrens physical activity levels are not enough to counteract sedentary lifestyles
2. Unique adaptations to a symbiotic lifestyle reveal novel targets for aphid insecticides
3. RI Hospital: Use of PMP may increase demand for drug treatment, reduce painkiller abuse
4. Killer whale at risk due to inadequate prey population
5. Young researcher taking fight against global killer to the next level in Vietnam
6. Killer silk: Making silk fibers that kill anthrax and other microbes in minutes
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Lifestyle of a killer
(Date:4/5/2017)...  The Allen Institute for Cell Science today announces ... portal and dynamic digital window into the human cell. ... application of deep learning to create predictive models of ... a growing suite of powerful tools. The Allen Cell ... publicly available resources created and shared by the Allen ...
(Date:4/3/2017)... WASHINGTON , April 3, 2017 /PRNewswire-USNewswire/ ... single-cell precision engineering platform, detected a statistically ... cell product prior to treatment and objective ... highlight the potential to predict whether cancer ... prior to treatment, as well as to ...
(Date:3/29/2017)... 29, 2017  higi, the health IT company that ... North America , today announced a Series B ... of EveryMove. The new investment and acquisition accelerates higi,s ... to transform population health activities through the collection and ... higi collects and secures data today on behalf ...
Breaking Biology News(10 mins):
(Date:9/21/2017)... ... September 21, 2017 , ... ... enable the world’s most progressive pharma and biotech organizations to do more clinical ... pharma and biotech events in Q4. , DrugDev will demonstrate DrugDev Spark™, the ...
(Date:9/20/2017)... ... September 20, 2017 , ... The award-winning ... Services (Koch) to feature new innovations aimed at helping farmers solve the problem ... American Farmer airs Tuesdays at 8:30aET on RFD-TV. Check your local listings for ...
(Date:9/20/2017)... ... September 20, 2017 , ... ... study examining the effects of exoskeleton-assisted walking on gait parameters and neuromuscular ... article, "Neuromechanical adaptations during a robotic powered exoskeleton assisted walking session" (doi:10.1080.10790268.2017.1314900) ...
(Date:9/19/2017)... ... , ... Participants of this educational webinar will learn the ... the advantages and disadvantages of ductless, filtered fume hoods, they will also discover ... Attendees will learn from an industry expert about the different types of ducted ...
Breaking Biology Technology: