星期三, 4月 02, 2014
大自然真系令人費解…
呢種性病既要宿主絕代，咁自已最後咪都死埋？
最奇怪既竟然系…
http://theweek.com/article/index/259074/this-is-one-of-the-sickest-most-twisted-stds-that-nature-has-to-offer
最奇怪既竟然系…
The virus has another trick up its sleeve. Mucking with the crickets' immune system not only speeds up their courtship, but also keeps them in good enough shape to attract a mate. Animals that are sick usually won't put much, or any, effort into mating. They'll also often stop eating and lose weight while their immune systems fight off the infection. Other animals will pick up on these signs and avoid mating with sick suitors. That would be a dead end for a sexually transmitted infection, but the crickets with IIV-6/CrIV didn't show any of these "sickness behaviors" and were still attractive enough get other crickets to mate. They maintained their weight and went about their day as normal, the researchers think, because the virus keeps their fat bodies from producing the immune signals that tell them to do otherwise.
Adamo and her team aren't sure how IIV-6/CrIV does any of this, but they think it is at least partly attributable to a reduction in the host's overall protein content and the activity of virucidal enzymes. That would explain the lack of sickness behaviors, but not the males' speedy courting. Researchers will need to observe some more poor crickets mating futilely to fully understand the virus' exploitation of cricket sex.
如果科舉學家callE 研究用系人身上，一定大賣，既callE 增加性吸引力，又五駛避孕。http://theweek.com/article/index/259074/this-is-one-of-the-sickest-most-twisted-stds-that-nature-has-to-offer
星期二, 4月 01, 2014
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