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:11/30/2016)... Nov. 30, 2016  higi SH llc (higi) ... initiative targeting national brands, industry thought-leaders and celebrity ... respective audiences for taking steps to live healthier, ... in 2012, higi has built the largest self-screening ... 38 million people who have conducted over 185 ...
(Date:11/29/2016)... Lithuania , Nov. 29, 2016 /PRNewswire/ ... biometric identification and object recognition technologies, today ... (SDK) for fingerprint recognition solutions that run ... a fingerprint template using less than 128KB ... in compact devices that have limited on-board ...
(Date:11/28/2016)... , Nov. 28, 2016 ... a rate of 16.79%" The biometric system market ... grow further in the near future. The biometric system ... billion in 2022, at a CAGR of 16.79% between ... system, integration of biometric technology in smartphones, rising use ...
Breaking Biology News(10 mins):
(Date:12/6/2016)... 2016  SRI International has been awarded a ... National Institutes of Health,s National Institute of Allergy ... (NIAID-DAIDS) to support the manufacturing and characterization of ... Under the seven-year contract, SRI will provide a ... candidate HIV-prevention products that emerge from investigator-initiated studies ...
(Date:12/5/2016)... ... December 05, 2016 , ... ... cellulose nanocrystals and cellulose nanofibrils. The composition claims are not limited to ... claims directed to combination with polymers, carbon fibers, graphene, and other materials. ...
(Date:12/5/2016)... , Dec. 5, 2016  Renova™ Therapeutics, a ... heart failure and other chronic diseases, announced that ... company as Chief Financial Officer (CFO), effective today. ... 20 years of experience in financial management for ... and software companies. Most recently, Ms. Bovenizer was ...
(Date:12/5/2016)... YORK , December 5, 2016 ... player worldwide, with almost $108 billion of revenue and ... $170 billion were spent on global biopharmaceuticals, and this ... This morning, Stock-Callers.com has lined up these four equities ... ), ACADIA Pharmaceuticals Inc. (NASDAQ: ACAD ), ...
Breaking Biology Technology: