Every summer since West Nile virus’s first U.S. appearance in 1999, Americans have listened to warnings about the mosquito-borne disease and its potentially deadly effects, a severe flu-like fever sometimes accompanied by an even more dangerous brain inflammation. Because the disease—and its attendant worries—recur every year, it’s easy to tune out West Nile coverage. But the Center for Disease Control has announced that this year’s outbreak is shaping up to be one of America’s worst, with the current count at 1,118 cases and 41 deaths. About half the reports come from a single state: Texas.
For frequent readers of this blog and Carl Zimmer’s The Loom, the bacterium Clostridium difficile may ring a bell. It’s a germ that can cause devastating, intractable gut infections, and is one of the reasons behind the recent development of fecal transplants to try to give the patient healthy gut bacteria to fight back with. C. difficile is on more people’s radar these days, and with good reason. A new Centers for Disease Control report shows that infections from C. difficile and another gut pathogen, norovirus, have grown more common and much more lethal in the last fifteen years. In 2007, they killed more than double the people they’d killed ten years before, jumping from 7,000 to 17,000. Most of those who died were elderly.
Virions from a smallpox vaccine
What’s the News: Global health officials are expected to decide whether to destroy the world’s last caches of smallpox at the 64th World Health Assembly this week. The disease was declared eradicated by the World Health Organization in 1979, but two small stores of the virus remain: one at the Centers for Disease Control and Prevention in Atlanta and one in a Russian government lab.
Now, public health officials are divided on how to ensure that the disease stays eradicated. Some say our best bet is to keep the remaining samples of the virus safe and continue to study them, then destroy them at a later date; others say the safest course is to destroy them now, once and for all.