Featured Research

from universities, journals, and other organizations

Edible Bivalves As A Source Of Human Pathogens: Signals Between Vibrios And The Bivalve Host.

Date:
May 26, 2005
Source:
Blackwell Publishing Ltd.
Summary:
Clams, mussels and oysters are important vehicles for the transmission of enteric diseases when consumed raw or undercooked. Vibrio species, including human pathogens, are particularly abundant in bivalve tissues, where they can persist even after cleaning procedures, thus representing a potential risk for human health.

Shucking oysters.
Credit: William B. Folsom, NMFS / Courtesy of NOAA Photo Library

Clams, mussels and oysters are important vehicles for the transmission of enteric diseases when consumed raw or undercooked. Vibrio species, including human pathogens, are particularly abundant in bivalve tissues, where they can persist even after cleaning procedures, thus representing a potential risk for human health. Although different environmental factors are well known to affect the persistence of vibrios in these organisms, the key role of the interactions between vibrios and the immune system of bivalves has been recently highlighted by scientists from the Universities of Genova and Urbino (Italy) in Environmental Microbiology.

Carla Pruzzo, from the University of Genova explains: "In bivalves, immunity is carried out by circulating haemocytes and soluble haemolymph factors that act in a co-ordinate way to kill microorganisms. Our research examines available data on Vibrio interactions with both cellular and soluble components of the bivalve immune system in the light of the capacity of bacteria to evade the hemolymph bactericidal activity and to develop pathogenic effects in the bivalve host."

The authors describe their data obtained with an in vitro model of Vibrio cholerae challenged against the immune system of Mytilus galloprovincialis, chosen as representative of important and appreciated seafood in the Mediterranean area. The results obtained allowed the identification of factors that are important in determining the fate of vibrios within the bivalve host, such as bacterial surface ligands, soluble hemolymph components and the ability of bacteria to affect distinct signaling pathways responsible for the hemocyte immune response.

Laura Canesi, from the University of Urbino adds "In bivalve hemocytes, different Vibrio species and strains seem to adopt a common strategy utilized by pathogenic bacteria in mammalian cells: to undermine host cell functions through disregulation of its signaling pathways".

This research gives an insight into the complexity of signals that pass between vibrios and bivalve host cells and helps to explain how these processes develop in natural conditions and determine the fate of vibrios in the bivalve host.


Story Source:

The above story is based on materials provided by Blackwell Publishing Ltd.. Note: Materials may be edited for content and length.


Cite This Page:

Blackwell Publishing Ltd.. "Edible Bivalves As A Source Of Human Pathogens: Signals Between Vibrios And The Bivalve Host.." ScienceDaily. ScienceDaily, 26 May 2005. <www.sciencedaily.com/releases/2005/05/050526140541.htm>.
Blackwell Publishing Ltd.. (2005, May 26). Edible Bivalves As A Source Of Human Pathogens: Signals Between Vibrios And The Bivalve Host.. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/2005/05/050526140541.htm
Blackwell Publishing Ltd.. "Edible Bivalves As A Source Of Human Pathogens: Signals Between Vibrios And The Bivalve Host.." ScienceDaily. www.sciencedaily.com/releases/2005/05/050526140541.htm (accessed September 20, 2014).

Share This



More Health & Medicine News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com
How The 'Angelina Jolie Effect' Increased Cancer Screenings

How The 'Angelina Jolie Effect' Increased Cancer Screenings

Newsy (Sep. 19, 2014) Angelina's Jolie's decision to undergo a preventative mastectomy in 2013 inspired many women to seek early screenings for the disease. Video provided by Newsy
Powered by NewsLook.com
The Cost of Ebola

The Cost of Ebola

Reuters - Business Video Online (Sep. 18, 2014) As Sierra Leone prepares for a three-day "lockdown" in its latest bid to stem the spread of Ebola, Ciara Lee looks at the financial implications of fighting the largest ever outbreak of the disease. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins