HOME >> BIOLOGY >> NEWS
UC study links parasites in freshwater runoff to sea otter deaths

Disease-causing parasites in freshwater runoff may be killing federally protected southern sea otters, according to University of California scientists.

In recent years, wildlife veterinarians have become concerned about the increasing number of southern sea otters dying in California. The current otter population is 10 percent lower than it was in 1995. Disease has been identified as one reason. Two species of protozoa, Toxoplasma gondii and Sarcocystis neurona, have been identified as important causes of fatal brain infections in these otters.

To understand the rise in sea otter deaths, scientists from the Wildlife Health Center in the UC Davis School of Veterinary Medicine joined colleagues from other agencies to investigate potential sources of Toxoplasma contamination.

In a study published in the July issue of the International Journal for Parasitology, the scientists compiled environmental, demographic, spatial and serological data for 223 live and dead California sea otters tested between 1997 and 2001. Using a new diagnostic test developed by UC Davis scientists, the authors found that 42 percent of live otters and 62 percent of dead otters were infected with Toxoplasma. Their study suggests that land-based freshwater runoff is a source of Toxoplasma infection for sea otters.

Cats are the only animals known to shed oocysts, which are the tough, environmentally resistant eggs of Toxoplasma parasites, in their feces. However, the connection between land-loving felines and sea otters puzzles researchers.

Before analyzing their data, lead author Melissa Miller and her co-authors at UC Davis, the California Department of Fish and Game, the Central Coast Regional Water Quality Control Board and the Bay Foundation of Morro Bay theorized that sea otters might be exposed to Toxoplasma through both freshwater runoff and municipal waste (sewage), from cat feces flushed down toilets. Primary and secondary sewage treatment may
'"/>

Contact: Pam Kan-Rice
pamela.kan-rice@ucop.edu
510-987-0043
University of California - Division of Agriculture & Natural Resources
26-Jun-2002


Page: 1 2 3

Related biology news :

1. Student science contest participation influences study, career choices, alumni say
2. New study shows hope for treating inhalant abuse
3. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
4. Cigarette smoke causes breaks in DNA and defects to a cells chromosomes, Pitt study finds
5. New study indicates arsenic could be suitable as first-line treatment in type of leukaemia
6. Phase II trials of second-generation antisense cancer drug planned following successful early study
7. Preclinical safety study shows adipose-derived stem cells improve heart function after heart attack
8. Indiana University, EPA to study airborne PCBs
9. K-State, other universities to study how climate affects plant evolution
10. USC study links historical increases in life span to lower childhood exposure to infection
11. Washington University in St. Louis leads group studying aging process

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


(Date:6/23/2020)... (PRWEB) , ... June 23, 2020 , ... In its ... feature interview with Dr. James L. Sherley, M.D., Ph.D., founder and director of ... the company announced on June 16 that starting July 5 it would ...
(Date:6/11/2020)... ... June 08, 2020 , ... ... and other protective measures to protect workers in the medical field. The face ... staffs who valiantly risk their lives every day to provide healthcare to pregnant ...
(Date:6/2/2020)... MILWAUKEE (PRWEB) , ... June ... ... International, the world’s leading barcode and RFID labeling software developer and solutions ... TEKLYNX CENTRAL , improved labeling accuracy and compliance by 100%, resulting ...
Breaking Biology News(10 mins):
(Date:6/3/2020)... MONTREAL (PRWEB) , ... June 03, 2020 , ... ... designed to highlight various applications of biofeedback. In the next installment, Dr. Inna ... a practice whereby individuals learn to bring their attention to the feelings, thoughts, ...
(Date:5/30/2020)... ... 29, 2020 , ... Medrio, Inc., the leading provider of ... enabled Cytovale, Inc., a medical technology company dedicated to revolutionizing diagnostics for conditions ... patient in (FPI) in just seven days. The Cytovale technology will allow patients ...
(Date:5/28/2020)... (PRWEB) , ... May 28, 2020 , ... ... R&D, today announced the release of Genedata Screener ® 17.0, the latest ... screening data from all in-vitro screening assay technologies. Genedata will host a webinar ...
(Date:5/26/2020)... ... May 26, 2020 , ... Brilliant , the leading smart ... smart garage door openers, announce a new integration to bring more convenience, simplicity, and ... openers powered by Aladdin Connect® can now be controlled from Brilliant’s in-wall touchscreen control ...
Breaking Biology Technology:
Cached News: