HOME >> BIOLOGY >> NEWS
NC State scientists confirm second toxic pfiesteria species

waste lagoon. During two years of testing by Burkholder and associate Howard Glasgow Jr.'s lab, as well as by an independent lab for careful corroboration, all the tests confirmed that the organism is toxic.

Researchers have discovered other Pfiesteria "lookalike" organisms, but P. shumwayae is the first truly Pfiesteria-like organism - besides P. piscicida - to be found harmful to fish.

Burkholder said that the life cycle and behavior of P. shumwayae are identical to those of P. piscicida. Like P. piscicida, the newly described species has a complex series of life stages, most of which are nontoxic. "So far, we've confirmed that 19 of its stages are similar to those of piscicida, and we believe that it's only a matter of time before we verify that the other stages are also the same," she said.

Most of those stages are nontoxic in both species. In the presence of live fish, however, several stages of both species generate toxins that stun the fish and cause open sores on their skin; the microbes then feed on the fish tissue and blood. Both also prefer to prey on the same kinds of algae when fish are not available, and can "steal" plant-like organelles from algae to masquerade as microscopic plants.

NC State researchers, however, found dissimilarities in the structure and the genetic makeup of the two species. Molecular probes identified a 3 percent difference between the two species' DNA. Glasgow spent 200 hours over two years mapping the surface of hundreds of Pfiesteria zoospores using a scanning electron microscope. In so doing, he found that many specimens had a different "fingerprint" - they had a four-sided structural plate on the outside of the cells where P. piscicida had a three-sided plate.

"The difference between these species is the difference between a diamond and a triangle," Burkholder explained.

Thus far, P. shumwayae has been found to overlap the geographic distribution of P. piscicida: The single-celled organisms inhab
'"/>

Contact: Kevin Potter
kevin_potter@ncsu.edu
919-515-3470
North Carolina State University
9-Mar-2000


Page: 1 2 3

Related biology news :

1. New Arizona State center brings science to policy on issues of water resources and urban growth
2. K-State, other universities to study how climate affects plant evolution
3. K-States National Agricultural Biosecurity Center receives $1.3 Million from Department of Defense
4. K-State professor combines love of teaching, research to examine eye development
5. K-State researcher working to improve alternatives to equine antibiotics
6. Lung cancer patients in Japan, United States react differently to the same chemotherapy regimen
7. K-State business researchers to help with major study on food supply veterinary medicine
8. K-State researchers share $1 million grant to study insect pests
9. UC Riverside professor to spend year with US State Department
10. American Lung Associations 2004 State of the Air report ranks cities and counties with dirty air
11. K-State soil carbon sequestration research playing role in climate change efforts

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/22/2016)... 2016   Acuant , the leading ... has partnered with RightCrowd ® to ... Management, Self-Service Kiosks and Continuous Workforce Assurance. ... functional enhancements to existing physical access control ... with an automated ID verification and authentication ...
(Date:6/20/2016)... -- Securus Technologies, a leading provider of civil ... investigation, corrections and monitoring announced that after exhaustive ... the final acceptance by all three (3) Department ... (MAS) installed. Furthermore, Securus will have contracts for ... October, 2016. MAS distinguishes between legitimate wireless device ...
(Date:6/9/2016)... innovation leader in attendance control systems is proud to announce the introduction of fingerprint ... sure the right employees are actually signing in, and to even control the opening ... ... ... Photo ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... ... and Mold) microbial test has received AOAC Research Institute approval 061601. , “This ... introduced last year,” stated Bob Salter, Vice President of Regulatory and Industrial Affairs. ...
(Date:6/23/2016)... , ... June 23, 2016 , ... ... announced the launch of the Supplyframe Design Lab . Located in Pasadena, ... explore the future of how hardware projects are designed, built and brought to ...
(Date:6/23/2016)... Calif. , June 23, 2016  Blueprint Bio, ... biological discoveries to the medical community, has closed its ... Matthew Nunez . "We have received ... with the capital we need to meet our current ... essentially provide us the runway to complete validation on ...
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory Compliance Associates® Inc. (RCA), ... free webinar on Performing Quality Investigations: Getting to Root Cause. ... no charge. , Incomplete investigations are still a major concern to the Regulatory ...
Breaking Biology Technology:
Cached News: