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Latest Parasitism Stories

2012-11-28 11:21:37

When herbivores such as caterpillars feed, plants may "call for help" by emitting volatiles, which can indirectly help defend the plants. The volatiles recruit parasitoids that infect, consume and kill the herbivores, to the benefit of the plant. However, such induced plant odors can also be detected by other organisms. A new study published November 27 in the open access journal PLOS Biology shows how secondary parasitoids ('hyperparasitoids') can take advantage of these plant signals to...

2012-11-08 12:28:38

Researchers find a viral symbiont of a protozoan parasite increases virulence to the human host When humans have parasites, the organisms live in our bodies, co-opt our resources and cause disease. However, it turns out that parasites themselves can have their own co-habitants. Researchers from Harvard Medical School, Brigham and Women's Hospital and SUNY Upstate Medical University have found that the pathogenicity of the sexually transmitted protozoan parasite Trichomonas...

Red Queen Or Red King
2012-09-24 10:52:18

In relationships based on mutuality, the number of individuals involved can determine the rate at which species evolve The relationship between species determines how rapidly they evolve. Parasites and their hosts coevolve more rapidly, and partners in a mutualistic relationship can evolve more slowly. But this view is obviously too simplistic. The rate of evolution in a mutualistic relationship does not depend only on the type of interactions, but also on the number of individuals...

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2012-09-04 18:54:17

Lee Rannals for redOrbit.com — Your Universe Online You may want to start washing your hands after petting fluffy, because new estimates indicate that 350,000 people a year in the United Kingdom become infected with toxoplasmosis. The disease is spread by direct contact with cats, or eating contaminated food, according to a report by the Food Standards Agency. Only about one in 10 of the people who have become infected with toxoplasmosis have symptoms. "The biggest threat is...

One Extinction Leads To Another
2012-08-20 10:09:46

redOrbit Staff & Wire Reports - Your Universe Online According to new research, when a carnivore becomes extinct, other predatory species could soon tag along. Other scientists have previously submitted this theory, but a University of Exeter team has now carried out the first experimentation to authenticate it. According to lead researcher Dr Frank van Veen of the University of Exeter's Centre for Ecology and Conservation, "Our experiment provides the first proof of something that...

Some Suicide Attempts May Be Blamed On Parasite
2012-08-17 15:24:09

Lee Rannals for redOrbit.com — Your Universe Online A parasite may be to blame for some suicide attempts, according to research appearing in the Journal of Clinical Psychiatry. Toxoplasma gondii, or T. gondii, lies in the bodies of 10 to 20 percent of Americans, but in most it was thought to lie dormant. However, it appears as though the parasite can cause inflammation over time, which produces harmful metabolites that can damage brain cells. “Previous research has found...

2012-08-16 00:53:26

Researchers at Duke University Medical Center may finally have discovered why people with sickle cell disease get milder cases of malaria than individuals who have normal red blood cells. In a finding that has eluded scientists for years, Duke researchers discovered that genetic material in red blood cells may help alter parasite activity via a novel mechanism that alters parasite gene regulation. "One of the most interesting findings in our study is that the human microRNA (very small...

2012-08-13 15:02:34

A targeted approach to treating toxoplasmosis, a parasitic disease, shows early promise in test-tube and animal studies, where it prevented the parasites from making selected proteins. When tested in newly infected mice, it reduced the number of viable parasites by more than 90 percent, researchers from the University of Chicago Medicine report in the Proceedings of the National Academy of Sciences. This precisely focused therapy combines short strands of "antisense" nucleic acid-like...

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2012-08-13 07:55:35

redOrbit Staff & Wire Reports - Your Universe Online Climate change could cause parasites such as tapeworms to become more infectious or malignant, researchers from Oakland University and the University of South Florida claim in a new study gauging the impact of temperature swings on frogs' fungal infection rates. The research, which was published in Monday's edition of the journal Nature Climate Change, shows that tiny parasitic organisms likely have an easier time adapting to...


Latest Parasitism Reference Libraries

Lancet Liver Fluke, Dicrocoelium dendriticum
2014-01-12 00:00:00

The lancet liver fluke (Dicrocoelium dendriticum) is a parasitic worm that is classified within the Platyhelminthes phylum. It is thought to be native to over thirty countries including Switzerland, Spain, Germany, Iran, China, Vietnam, Japan, Ghana, and Nigeria, among many other areas. It is also found in South and North America and in Australia. It is typically found in cattle or other grazing species, so it is thought to prefer a habitat that supports these species. It is similar in...

Profilicollis
2014-01-05 00:00:00

Profilicollis is a genus of acanthocephalan parasites that are found in crustaceans and shorebirds. Profilicollis parasites use decapod crustaceans as intermediate hosts and species of shorebirds as definitive hosts. The parasite first develops in mole crabs of North and South America. After it infects a mole crab, it becomes dormant until the crab is eaten by a suitable bird, such as a Surf scoter or Herring Gull. Once the parasite has passed through the stomach of the bird, it develops...

Moniliformis moniliformis
2014-01-05 00:00:00

Moniliformis moniliformis is a species of acanthocephalan parasite that can infect humans, though it rarely does. Human infections have been reported in the United States, Iran, Iraq, and Nigeria. It has been found in rats all over the world, and usually is found in cats, dogs and, in Poland, red foxes. Intermediate hosts are usually beetles and cockroaches. This parasite, like other acanthocephalans, does not have a digestive tract. It absorbs nutrients through the tegument (external...

Giant Thorny-headed Worm, Macracanthorhynchus hirudinaceus
2014-01-05 00:00:00

The Giant Thorny-headed Worm (Macracanthorhynchus hirudinaceus) is a species of acanthocephalan parasite found in the intestines of pigs and other hoofed animals, and can occasionally appear in humans and dogs. The eggs of this parasite are usually found in scarabaeoid or hydrophilid beetles and other similar insects. Worms of this species range in size from less than four-hundredths of an inch to over 15 inches. It causes enteritis, gastritis or peritonitis in affected hosts. While it...

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Word of the Day
abrosia
  • Wasting away as a result of abstinence from food.
The word 'abrosia' comes from a Greek roots meaning 'not' and 'eating'.