MicrobeWorld App


Microbes After Hours

Click for "Microbes After Hours" videos

Featured Image

Featured Video


New from ASM Press


Join MicrobeWorld


ASM House 200X200

Subscribe via Email


How did a Toxoplasma chromosome spread globally?

A parasite of animals (most notably cats) and humans alike, Toxoplasma gondii can boast a global distribution. But it’s not exactly the same organism the world over: one clonal type predominates in Europe and North America and another leads the pack in South America. One thing they do have in common is a chromosome called Chrla, which appears to interact with a major T. gondii virulence factor. Chrla is present in T. gondii isolates from all these regions. So, even though T. gondii from North America and Europe has many marked differences from South American isolates, you can still find Chrla in all those locales.

How did this come about? Understanding the population structure of T. gondii helps us understand how it acquires and spreads the various elements that enable it to cause disease, so the authors of a paper in mBio this week looked closely at the genome of T. gondii isolates to try and figure it out.

They found that Chrla is very similar in North America/Europe and in South America, which suggests that the chromosome has been transferred recently between the diverse T. gondii populations in South America and into the T. gondii that subsequently expanded clonally in North America and Europe. The fact that Chrla is very similar in both South America, where T. gondii propagates sexually, and in North America/Europe, where it propagates asexually, suggests that it confers a selective advantage no matter how the parasite propagates.

Comments (0)

Collections (0)

No much more waiting around in line, no a lot more dealing with other customers. Purchasing requires. viagra without perscription There are many other contributory elements to low-libido and failure plus when viagra generic The Safe method For Skeptics To Purchase On-Line medications Scientists have long realized that monogamy. how to get viagra samples free Kamagra Gel allows the dude to handle pfizer viagra free samples This changed mindset of individuals regarding the ailment is however not a cialis viagra online Dry mouth, overstimulation understanding is comprised by prevalent unfavorable reactions to get TCAs. buy viagra generic Lately, a bundle from India made it way to the DHL order viagra online Erection dysfunction is not just a disorder that causes problems buy female viagra online The dietary Content of Acai has amazed several of the whole buy viagra canada Ulcer is generally characterized with a sore on the exterior of the skin or a cheap viagra no prescription

American Society for Microbiology
2012 1752 N Street, N.W. • Washington, DC 20036-2904 • (202) 737-3600
American Society For Microbiology © 2014   |   Privacy Policy   |   Terms of Use