Navigation Links
Same-sex mating by fungi spawned infection outbreak, evidence suggests

ners.

Among clinical and environmental isolates of the fungus from British Columbia, the researchers identified two forms: an extremely virulent major strain, which accounted for 95 percent of all samples, and a less virulent and less common strain, which made up the other five percent.

By comparing select gene sequences that spanned the genomes of the Vancouver Island fungi to samples collected from around the world, the team traced the rarer type to identical isolates in Australia. The major form matched a sample taken from an infected person in Seattle 30 years ago and another collected from a Eucalyptus tree in San Francisco in 1992.

What's more, the Canadian strains shared approximately half of their genetic makeup, suggesting that the two might be related. Further analysis confirmed this initial finding, suggesting that the two C. gattii strains in Vancouver Island are either siblings or that one is the parent and the other the progeny.

"Given that the minor outbreak form also exists in multiple locations in Australia, while the major outbreak form has only been found in the Pacific Northwest, we favor the hypothesis that the minor type represents one of two parental strains that gave rise to the major outbreak isolate," said study author James Fraser, Ph.D., also of Duke. "The second parent strain remains to be discovered."

Additional examination of the mating type locus provided evidence that the major outbreak isolate may have resulted from same-sex mating, Heitman added. In a traditional sexual cycle, all alpha progeny inherit identical alpha genes from their alpha parent. However, the mating type locus of the two strains from Vancouver Island both of the alpha mating type -- differed at numerous sites, they found.

"Sex within the same mating-type may confer an evolutionary advantage when the opposite mating type is unavailable," Heitman said. "Other human pathogens or parasites may harbor cryptic same-sex c
'"/>

Source:Duke University Medical Center


Page: 1 2 3 4

Related biology news :

1. Crickets finicky mating behavior boosts biodiversity
2. PHACCS, an online tool for estimating the structure and diversity of uncultured viral communities using metagenomic information
3. Certain fish have a special mating preference
4. Space matters: Estimating species diversity in the fossil record
5. Weapon performance determines mating success in the collared lizard
6. Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants
7. Sperm trading can resolve hermaphrodite mating conflicts
8. New study examines how sense of smell affects mating and aggression in mice
9. Male chimpanzees prefer mating with old females
10. Microfluidic chip helps solve cellular mating puzzle
11. Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils
Post Your Comments:
(Date:9/30/2014)... of tourists visit the Mediterranean each year, but ... underway on Earth. Almost 1,000 alien species, including ... other seas through human activities. In the open-access ... multinational team of researchers analyzed data from a ... to show how the introduction of alien species ...
(Date:9/30/2014)... Diego, have completed the first comprehensive numerical simulation of ... pixels in an image as data points for the ... researchers, led by J.S. Chen, the William Prager Professor ... at UC San Diego, presented their findings on the ... Pittsburgh this month. Chen also gave a keynote speech ...
(Date:9/30/2014)... conducted by the Ocean Health Index rates the ... overall health. In addition, for the first time, ... ocean regions beyond national jurisdiction (high-seas areas) ... safeguarding biodiversity and providing sustainable food sources. , ... a partnership led by scientists from UC Santa ...
Breaking Biology News(10 mins):Biodiversity in the Mediterranean is threatened by alien species 2First comprehensive meshfree numerical simulation of skeletal muscle tissue achieved 2Rating the planet's oceans 2Rating the planet's oceans 3
... trunk and dense profusion of branches, the Tree of ... beauty. While major strides have been made to establish ... is still in its infancy. At ... filling in the Tree of Life by developing sophisticated ...
... both an essential nutrient in agricultural fields and a contributor ... P management in fields, the P Index was proposed as ... use, modifications, and growing pains, does the P Index accurately ... being published next month in the Journal of Environmental ...
... shows that ocean turbulence directly affects the ability of microscopic ... web. Results of the study are published in this ... John Taylor of Cambridge University and Roman Stocker at MIT ... water in the ocean and the ability of marine bacteria ...
Cached Biology News:A new computational method for timing the tree of life 2A new computational method for timing the tree of life 3The Phosphorus Index: Changes afoot 2The Phosphorus Index: Changes afoot 3Stirred not mixed: How seawater turbulence affects marine food webs 2Stirred not mixed: How seawater turbulence affects marine food webs 3
(Date:9/30/2014)... of one of nature,s most efficient light-harvesting structures, ... by Alejandro Briseno of the University of Massachusetts ... long-sought polymer architecture to boost power-conversion efficiency of ... , Briseno, with colleagues and graduate students ... and Dresden University of Technology, Germany, report in ...
(Date:9/30/2014)... Shimadzu Scientific Instruments has released ... highly precise tool for measuring displacement in rubber ... 1000-mm maximum movement distance, the DSES-1000 can measure ... length of 10 mm. In addition, it achieves ... stroke and within +/- 100 µm below 50-mm ...
(Date:9/30/2014)... Proove Biosciences , the commercial and research ... new genetic test built upon research from their published ... will provide physicians with an objective way to understand ... stratified between individuals. With this new test, physicians will ... genetic predisposition that will affect their pain tolerance. , ...
(Date:9/30/2014)... 30, 2014 CORD:USE Cord Blood Bank – ... it has entered into an Equity and Exclusive Services ... licensed a series of patented technologies for the isolation of ... applications.  Tianhe is performing Phase I/II clinical trials in ... using Tianhe,s Stem Cell Educator Therapy showing ...
Breaking Biology Technology:Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3Shimadzu’s New Long-Travel Extensometer Increases Precision for Soft Material Testing 2Proove Biosciences is Now Offering the Proove Pain Perception Genetic Test to Help Physicians Assess Patient Pain Tolerance Levels 2Proove Biosciences is Now Offering the Proove Pain Perception Genetic Test to Help Physicians Assess Patient Pain Tolerance Levels 3CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 2CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 3CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 4
... deadly fumes in subways, toxic gases in chemical ... easier and more efficient with a measurement technique ... technique,s sensitivity, scientists must design better scattering surfaces, ... Researchers at the University of Illinois, led by ...
... almost seven years in secret. , Most people did ... characterization department at Sandia National Laboratories was contributing important ... anthracis, the spores that cause the disease anthrax. The ... several news media offices and to two U.S. senators. ...
... 23 A bill designed to,strengthen energy cooperation ... Senate Foreign Relations Committee, is a positive step ... States to promote the production,and use of sustainable ... Industry Association (UNICA)., "It shows a clear ...
Cached Biology Technology:Killer pulses help characterize special surfaces 2FBI unveils science of anthrax investigation 2FBI unveils science of anthrax investigation 3New Bill to Expand Promotion of Biofuels Is a Welcome Boost for U.S.-Brazil Relations According to Brazilian Sugarcane Industry 2New Bill to Expand Promotion of Biofuels Is a Welcome Boost for U.S.-Brazil Relations According to Brazilian Sugarcane Industry 3
... are stored within neurons in vesicles ... in the synaptic bouton. Synaptosomes ... from other cellular debris. Abnormalites ... in many pathological condtions. Conditions ...
... Translation Detection Systems allow non-radioactive detection ... these systems, biotinylated lysine residues are ... eliminating the need for labeling with ... This biotinylated lysine is added to ...
... BFD Series Hybridization chambers with forced ... F above ambient up to 99.9 C / ... temperature accuracy and reproducible results DS controller ... temperature setting with an accuracy of a tenth ...
... the value of your microarray data using ... you need from consultation to extensive data ... methods. Utilize our expertise in combination with ... your own microarray experiments., ,Normalization and basic ...
Biology Products: