College of Veterinary Medicine» Reproduction http://www.vetmed.ufl.edu UNIVERSITY of FLORIDA Thu, 30 Oct 2014 13:46:37 +0000 en-US hourly 1 http://wordpress.org/?v=3.9.2 New species of parasite discovered as disease agent in domestic cats http://www.vetmed.ufl.edu/2013/07/17/new-species-of-parasite-discovered-as-disease-agent-in-domestic-cats/ http://www.vetmed.ufl.edu/2013/07/17/new-species-of-parasite-discovered-as-disease-agent-in-domestic-cats/#comments Wed, 17 Jul 2013 13:18:15 +0000 http://vetmed.sites.medinfo.ufl.edu/?p=6362 Research distinguishes the parasite that causes the disease in cats from the agent that causes it in cows
Owen Rae, Ph.D., a professor of large animal clinical sciences, and. Heather Walden, Ph.D., a research assistant professor in the University of Florida College of Veterinary Medicine, are shown with cows from a UF herd. Walden has identified a new species of parasite in domestic cats. Another species previously thought to be the same affects cattle, and Walden’'s research has looked closely at the different parasites in both species.

Dr. Owen Rae, a professor of large animal clinical sciences, and. Dr. Heather Walden, a research assistant professor in the UF College of Veterinary Medicine, are shown with cows from a UF herd. Walden has identified a new species of parasite in domestic cats. Another species previously thought to be the same affects cattle, and Walden’’s research has looked closely at the different parasites in both species.

University of Florida researchers have identified a new species of Tritrichomonas in domestic cats, distinguishing the parasite that causes the disease in felines from the agent long thought to affect both cats and cattle.

Although the disease is just beginning to be understood and tested for in cats, it costs cattle producers millions of dollars each year in lost revenue, researchers say.

“Up to now, there has only been one species, Tritrichomonas foetus, described in the reproductive tract of cattle and the intestine of cats,” said Dr. Heather Walden, a research assistant professor in the UF College of Veterinary Medicine, a part of UF Health. “We conducted experimental studies putting the feline isolate in cows and the bovine isolate in cats, and saw differences in the disease-causing capacity in each of these animal hosts.”

These studies, combined with molecular analysis of a small group of genes with similar sequencing patterns in cats and in cattle, noted key differences between the species. The study and findings appeared online in a recent issue of Parasitology Research. Walden named the newly discovered species Tritrichomonas blagburni in honor of Dr. Byron Blagburn, the Auburn University professor who was her mentor and led her doctoral studies there. “Although we were not the first to note that there were differences genetically between the pathogens that cause trichomoniasis in both cats and cows, in previous studies, many people focused on the genetics of the organism in order to determine species,” Walden said. “Our thought was, you have to look further at hosts and disease states in addition to some of the genetics.”

Feline trichomoniasis is an intestinal disease that results in chronic diarrhea, flatulence and fecal incontinence. Bovine trichomoniasis is a sexually transmitted disease of cattle that infects the reproductive tract of cows, causing uterine infections and possible mid- to late-term abortions.

“In cats, people are becoming more aware of the disease and testing for it more frequently now,” Walden said. “Treatment of cats with this disease is problematic — it sometimes works and sometimes doesn’t.”

In cattle, however, there is no treatment that prevents infection and the disease is very difficult to test for, particularly in big herds, Walden said.

“It’s one of those things where often the cattle owner will just cull the bulls or the cows that show symptoms of the disease,” she said. “Some cattle owners may try to control the disease through the use of artificial insemination, but that’s expensive and most owners won’t take that approach.”

Dr. Raoul Boughton heads the Disease Ecology Program at the Archbold Biological Station in Venus, Fla. He said Tritrichmonas foetus of cattle was a disease of “high economic concern” that can lead to the loss of 20 to 40 percent of calves from an infected herd.

He called Walden’s work on understanding the genetic relationship and ecology of infection of the Tritrichomonas species “an important step if we are to further our understanding and develop a solution to controlling this parasite that costs the cattle industry hundreds of millions of dollars a year in lost revenue.” Walden’s research group is now analyzing additional genes from a conserved genetic area obtained from parasites found in domestic cats and parasites obtained from cattle in order to characterize more genetic differences and help solidify the previous findings.

“The research by Dr. Walden and the description of Tritrichomonas blagburni and its association with different pathogenicities in the cat and cattle performs the great service of distinguishing these very similar agents, their hosts, and the diseases they cause in their respective hosts,” said Dr. Dwight Bowman, a professor of parasitology at Cornell University’s College of Veterinary Medicine.

“This is good for cats because it removes them as the reservoir source for infections of cattle on farms,” he added.

Other investigators involved in the study include a team of scientists from Auburn University and Virginia Tech. Walden completed her doctoral program at Auburn in 2008, focusing her dissertation on protozoan parasites, specifically Tritrichomonas foetus.

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Audrey Kelleman http://www.vetmed.ufl.edu/about-the-college/faculty-directory/audrey-kelleman/ http://www.vetmed.ufl.edu/about-the-college/faculty-directory/audrey-kelleman/#comments Wed, 12 Oct 2011 15:26:03 +0000 http://vetmed.sites.medinfo.ufl.edu/?page_id=1579 Lecturer

Large Animal Clinical Sciences
Large Animal Reproduction
akelleman@ufl.edu
PO Box 100136
2015 SW 16th Ave
Gainesville, FL 32608-0136
Large Animal Reproduction: 352-392-2229
Small Animal Reproduction: 352-392-2235
Large Animal Fax: 352-392-8289

Education

  • Diplomate, American College of Theriogenologists, 2000
  • Resident, Theriogenology, University of Florida College of Veterinary Medicine, Gainesville, Fla., 1998-2000
  • DVM, University of Florida, Gainesville, Fla., 1995
  • BS, Biology, Cornell University, College of Agriculture & Life Sciences, Ithaca, NY, 1990

Honors and Awards

  • Society of Phi Zeta

Professional Interests

  • General clinical reproduction in a variety of species, including horses, small ruminants, camelids, and dogs and cats
  • Equine embryo transfer
  • Equine semen freezing

Recent Publications

Additional Publications

 

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Malgorzata Pozor http://www.vetmed.ufl.edu/about-the-college/faculty-directory/malgorzata-pozor/ http://www.vetmed.ufl.edu/about-the-college/faculty-directory/malgorzata-pozor/#comments Sun, 25 Sep 2011 00:59:52 +0000 http://vetmed.sites.medinfo.ufl.edu/?page_id=1239 Clinical Assistant Professor

Large Animal Clinical Sciences
Large Animal Reproduction
pozorm@ufl.edu
PO Box 100136
2015 SW 16th Ave
Gainesville, FL 32608-0136
352-392-2229
FAX: 352-392-8289

Education

  • Diplomate, American College of Theriogenologists, 1996
  • PhD, Academy of Agriculture, Krakow, Poland, 1992
  • DVM, Academy of Agriculture, Wroclaw, Poland, 1985

Honors and Awards

  • Society for Theriogenology Resident Award, 1996
  • Polish-American Agricultural Exchange Program Award, 1988
  • Superior Achievement Faculty Award, Academy of Agriculture, Krakow, Poland, 1987
  • International Student Research Society Award, Wroclaw, Poland, 1984

Research Interests

Clinical interests include reproductive behavior and endocrinology, veterinary andrology and new modalities of imaging in diagnosis of reproductive disorders.

Recent Publications

Additional Publications

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Margo Macpherson http://www.vetmed.ufl.edu/about-the-college/faculty-directory/margo-macpherson/ http://www.vetmed.ufl.edu/about-the-college/faculty-directory/margo-macpherson/#comments Sun, 25 Sep 2011 00:51:23 +0000 http://vetmed.sites.medinfo.ufl.edu/?page_id=1206 Professor

Large Animal Clinical Sciences
Large Animal Reproduction
macphersonm@ufl.edu
PO Box 100136
2015 SW 16th Ave
Gainesville, FL 32608-0136
352-392-2229
Fax: 352-392-8289

Education

  • Diplomate, American College of Theriogenologists, 1994
  • MS, Texas A&M University, College Station, Texas, 1994
  • DVM, Michigan State University, East Lansing, Mich., 1990
  • BS, Zoology, Michigan State University, East Lansing, Mich., 1983

Honors and Awards

  • Appointed to Board of Directors for District III of the American Association of Equine Practitioners
  • President, American College of Theriogenologists, 2004-2005
  • Large Animal Clinician of the Year Award, University of Florida, Gainesville, Fla., 2003
  • Member, The National Society of Phi Zeta
  • Member, Sigma Xi

Research Interests

Dr. Macpherson is primarily interested in conditions that affect pregnancy including twin pregnancy and placentitis. Recent work from her laboratory has focused on effective treatments for bacterial placentitis.

Recent Publications

Additional Publications

 

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