Antibiotic use in agriculture can lead to antibiotic-resistant bacteria and those bacteria can infect humans.  A new study gave me chance to dig into the issue for the Los Angeles Times.

The study found that the meat you buy at the grocery store is as likely as not to be contaminated with Staphylococcus aureus bacteria, according to researchers who sampled 26 grocery stores in five US cities.  Yep, that’s a 50-50 chance.  Worse, the staph is likely to be resistant to at least one antibiotic drug. 

Farmers who raise food animals can buy feed with antibiotics in them -- the same drugs (or close enough) that are used as medicines in people.  It’s perfectly legal and easy -- no veterinarian to sign off, just money to buy the food.  A whole host of big name organizations -- the World Health Organization, the Centers for Disease Control and Prevention and the American Medical Association to name a few -- condemn this practice and yet it continues.

Photo credit: jon smith photography via Flickr Creative Commons

In my past life, I was a scientist who studied how contextual cues influenced drug action. I published papers in many scientific journals, although never this one: Physiology & Behavior.

In my present life, I’m a journalist who was invited to write for the same journal about anabolic steroids. Steroids are not usually considered drugs of abuse and society’s regulations on their use are quite different than illegal drugs. In a piece the editors were compelled to label “opinion” -- mostly because it did not contain primary data -- I reported on a real-life case study on how the internet aids the misuse of anabolic steroids.

Are artificial food dyes harmless fun? Or do they make kids bounce off the walls? I explored the science behind these contradictory claims for the Los Angeles Times after an FDA advisory panel decided against warning labels for artificially colored foods. Many studies find behavioral effects of food dyes in kids, but they are too small and too variable to act upon.

One thing is for sure -- no harm in avoiding them. As nutrition researcher Laura Stevens says, “One thing about the food dyes, I don’t know of any nutritious foods that they’re in.”

Photo credit: Mouzzy via Flickr Creative Commons

Biologic understanding of the hair follicle, the mini-organ that produces the shafts of keratin we call hair, has advanced by leaps and bounds in the last ten years. Now a handful of biotechnology companies are trying to translate this new knowledge into viable treatments for male pattern baldness and other types of hair loss.

I wrote about the new approaches for Nature Biotechnology (access limited to subscribers), which use cell-based therapies and topical drug cocktails designed to stimulate epidermal stem cells to create new follicles. Hair loss afflicts men, women, and children as a result of aging, disease, and medical treatments. The men's market is so huge, one researcher told me, “It’s mind-boggling.”

Screening for cancer makes so much sense. Find the cancer early -- before symptoms show and tumors have grown and cancer has spread -- and have better chance of survival. However, in practice this is not always so. I wrote about an 18-year study in nearly 80,000 women found no benefit of screening for ovarian cancer for the Los Angeles Times. The lack of benefit couldn't have been more clear: no reductions in deaths, no finding cancers at earlier stages.

For the Los Angeles Times, I wrote about a provocative study out of the Netherlands says that more than 60% of kids diagnosed with Attention Deficit Hyperactivity Disorder (ADHD) might be helped by changes in their diet. The study was significant because it did not exclude kids with known allergies or allergy-related conditions, such as eczema and asthma. And yet, doctors in the US are not exactly jumping on the bandwagon and suggesting dietary overhauls for their patients. (Neither are they doing so in Holland, say the study's author Lidy Pelsser.) The docs I talked to all agreed that there may be dietary triggers in some kids and if parents asked, they would help them plan a dietary intervention. But none were going to suggest trying diet before drugs unless asked.

Last summer I worked on writing an e-book entitle Essentials of Cell Biology for Nature Education, in collaboration with Clare O'Connor, a biology professor at Boston College.

I think cell biology is an acquired taste, personally. I was never particularly interested in it when I was a graduate student or a researcher. But later, when I started my writing career, I often covered cell biology topics and research trends for The Scientist. I was intrigued -- I mean, cells have to take out their own garbage! Soon I was reading Lewis Thomas and I knew I was smitten.

I learned lots of fun facts while working on the e-book. For those of you who know this workflow: DNA to RNA to protein, did you know that it happens thousands of times each second in every cell? Cell biology blows me away.