General biology

Category archives for General biology

Baby on board–in a BSL4 lab

I’m happy to welcome Dr. Heather Lander to the blogosphere and Twitterverse. She’s a virologist who has done work with some of the world’s deadliest pathogens in a high-security biosafety level 4 laboratory. This is the type of lab where one must wear “space suits” to work with organisms. You’ve probably seen in dramatized in various movies and…

Eleven years ago, two scientists made a bet. One scientist wagered that a new type of antimicrobial agent, called antimicrobial peptides, would not elicit resistance from bacterial populations which were treated with the drugs. Antimicrobial peptides are short proteins (typically 15-50 amino acids in length) that are often positively charged. They are also a part of our…

Guest post by Tim Fothergill, Ph.D. In January of this year the British Chief Medical Officer urged her government to add  threat posed by superbugs to the official list of “Apocalypses to Worry About” along with catastrophic terrorist attacks and massive flooding. With typical British understatement, its actual name is the National Risk Register of Civil…

Student guest post by Sean McCaul Image Source:  http://www.cejournal.net/?p=1934 The next time somebody in your office or household has the flu, you might want to consider keeping your distance.  A new study published this month in Nature Communications suggests that about half of the transmission of influenza A results from inhalation of microscopic infectious droplets created…

Guest post by Hillary Craddock Last week a new study regarding Eastern Equine Encephalitis (EEE) was published online (Bingham et.al.). EEE is a mosquito-borne virus that can cause serious, and sometimes deadly, disease in humans and equines. In warmer parts of North America, the virus is spread year-round, but in areas where mosquitoes get killed…

While “flesh-eating infections” caused by the group A streptococcus (Streptococcus pyogenes) may grab more headlines today, one hundred and fifty years ago, the best known and most dreaded form of streptococcal infection was scarlet fever. Simply hearing the name of this disease, and knowing that it was present in the community, was enough to strike…

As I’ve laid out this week (

When is MRSA not MRSA?

…when it contains a weird gene conferring methicillin resistance that many tests miss. Methicillin-resistant Staphylococcus aureus (MRSA) has become a big issue in the past 15 years or so, as it turned up outside of its old haunts (typically hospitals and other medical facilities) and started causing infections–sometimes very serious–in people who haven’t been in…

Ebola has long been associated with wildlife. From the early days, bats were viewed as a potential reservoir (though it wasn’t confirmed that they actually harbored the virus until 2005). Contact with wild animals–particularly primates which were butchered for food–was also long thought to be a risk factor, and now we know that primates can…

Margulis does it again

We all know of once-respected scientists who ended up going off the deep end, adhering to an unproven idea despite massive evidence to the contrary. Linus Pauling and his advocacy of megadoses of Vitamin C, or Peter Duesberg’s descent into HIV denial. It’s all the more disappointing when the one taking a dive is a…