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Young Black Women Prone To Gain More Unhealthy Abdominal Fat Than Hispanics
Black women ages 20 to 29 are more prone to pack on unhealthy abdominal and visceral fat than Hispanic women the same age, and as compared to their elders, according to researchers from Wake Forest University Baptist Medical Center and colleagues.
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HCV Protease Inhibitor Telaprevir Improves Response, Halves Treatment Time For Hepatitis C Patients
For patients with the most common form of hepatitis C, the addition of a hepatitis C-specific protease inhibitor called telaprevir to the current standard therapy can significantly improve the chances of being cured, and it does it in half the time of standard therapy alone.
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One Secret To How TB Sticks With You
Mycobacterium tuberculosis is arguably the world"s most successful infectious agent because it knows how to avoid elimination by slowing its own growth to a crawl. Now, a report in the July 10 issue of the journal Cell, a Cell Press publication, offers new insight into the bugs" talent for meager living.
Medical Devices

Good Males Are Bad Fathers

Contrary to predictions, males of high genetic quality are not very successful when it comes to fertilizing eggs. A new study on seed beetles by Swedish and Danish scientists Goran Arnqvist and Trine Bilde shows that when a female mates with several males, the males of low genetic quality are the most successful in fertilizing eggs. The study is published in this week"s issue of Science. In almost all animals, females mate with several different males, despite the fact that a single mating is often sufficient to fertilize her eggs. Multiple mating also carries costs to females, such as the risk of catching sexually transmitted diseases. One commonly held belief is that this behaviour may allow females to choose the sperm of the male with highest genetic quality to fertilize her eggs. Professor Gç¶ran Arnqvist from the Department of Ecology and Evolution, Uppsala University and associate professor Trine Bilde from the Department of Biological Sciences, University of Aarhus, have tested this possibility directly for the first time and shown that it is not true. Their study on seed beetles shows that, contrary to predictions, males of low genetic quality are more successful in fertilizing eggs. Males who gained the highest share of paternity were actually males with low genetic quality. These males also fathered offspring that did less well. "The results support the suggestion that genes that are good for males may often be bad for their mates. Therefore, in beetles at least, multiple mating does not award females with genetic benefits," says Gç¶ran Arnqvist. Goran Arnqvist Uppsala University


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