[Date Prev][Date Next][Date Index]


We have two very interesting seminars coming up this week. Both seminars are a part of the ongoing NOAA/University of Michigan Seminar Series.

1) Speaker: *Alan E. Wilson*, Georgia Institute of Technology, Biology Department

Title:"Cyanobacteria-grazer interactions: effects of toxicity, morphology, and genetic diversity"

Date: Thursday, January 12

Time: 1030AM

Location: Great Lakes Environmental Research Laboratory

Interactions between herbivores and bloom-forming cyanobacteria play an important role in mediating the responses of freshwater phytoplankton assemblages to nutrient enrichment and top-down manipulation. Consequently, numerous observations have been made over the past four decades aimed at understanding the mechanisms mediating these interactions, namely cyanobacterial morphology or toxic secondary metabolites. Results from laboratory and field experiments will be presented that show how the morphology or secondary metabolites of the cyanobacterium, Microcystis aeruginosa, influence the feeding preferences of the invasive bivalve, Dreissena polymorpha, or the fitness of the common lake-dwelling zooplankter, Daphnia pulicaria. Interesting responses across different Microcystis and Daphnia strains isolated from Michigan lakes will be highlighted.

(For more information about this particular talk, please contact Dr. Peter Landrum at 734-741-2276)

2) (This seminar is a part of the NOAA/University of Michigan Great Lakes and Human Health Seminar Series)

Speaker: Anne Camper <http://www.coe.montana.edu/ce/faculty/acamper/>, Associate Dean for Research and Graduate Education, College of Engineering, Montana State University, Bozeman

Title: "Health Implications of Biofilms"

Date: Friday, January 13

Time: 11am

Location: 109 S. Observatory, School of Public Health, Auditorium 1
University of Michigan Central Campus, Ann Arbor
*driving directions can be found at http://sitemaker.umich.edu/globalhealthcouncil/files/directions.html*

(Transportation arrangements (including parking passes) can be made for those coming from GLERL- please contact me if you are interested)

Biofilms in drinking water systems can impact health in at least two ways. First, it is known that opportunistic pathogens can be part of the indigenous microbial biofilm populations found on distribution system and premise plumbing surfaces. When released from the biofilm and ingested/inhaled by a susceptible host, disease may occur. Organisms known to be associated with drinking water systems and disease include Legionella and Mycobacteria, and there is some evidence that Pseudomonas aeruginosa may also be in this category. Even less well understood is the interaction of other pathogens with indigenous drinking water biofilms. Questions include: How well are pathogens retained? What is their physiology? Are they rendered less susceptible to disinfection? Is their infectivity altered? Can they be released in sufficient numbers to cause disease? Although there are no answers at present to most of these questions, research is underway to provide initial insight. Our work has been focused on the manner in which the pathogenic bacteria Escherichia coli O157:H7 and Salmonella typhimurium are trapped and retained by biofilms. Inherent in these studies is the need to have good methods for pathogen detection in environmental samples. Recent advances in real-time PCR detection and the use of novel live/dead methods will be discussed. Results of experiments demonstrating the retention of pathogens in biofilms will also be presented.

If you have any questions or concerns, please email me at kanika.suri@noaa.gov; or call 734-741-2147.

For more information about the seminar series, please visit our website at http://www.glerl.noaa.gov/news/seminars/


Kanika Suri
Center of Excellence for Great Lakes and Human Health (CEGLHH)
2205 Commonwealth Blvd.
Ann Arbor, MI


* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
glin-announce is hosted by the Great Lakes Information Network (GLIN):

To subscribe: http://www.glin.net/forms/glin-announce_form.html

To post a message: http://www.glin.net/forms/glin-announce_post.html

To search the archive: http://www.glin.net/lists/glin-announce/

All views and opinions presented above are solely those of the author or
attributed source and do not necessarily reflect those of GLIN or its
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *