A breakdown of bacterial species from your skin’s microbiome. As a favor to pregnant women expectant fathers teenage boys on the internet everyone, this is the image I went with. Click to macrolaarggen (Ikean for embiggen).
Sometimes a headline will cause me to run through a series of reactions in rapid sequence. For example “Mothers facing C-sections look to vaginal ‘seeding’ to boost their babies’ health”:
Early studies show that swabbing a mother’s vagina and transferring it to her baby’s mouth, eyes and skin may stimulate microbiome development similarly to babies born naturally – and protect it from health issues later in life
I mean ick.
But take a step back. Not really. I tend to think of people like “Pig Pen” in Charlie Brown, shedding skin and bacteria into the environment. If we were to really think about each other’s microbiome, we might not have intimate contact with our significant other. Or any other animal. I always point out, when someone lets their dog lick them, that they (the dog) had probably just licked its rear, AKA dog-ass seeding. And no, a dog’s mouth is not cleaner than a human’s, unless your dog brushes and flosses with greater frequency than you. (more…)
Pictured: Superbug spawner, or savior to us all? Neither!
Recently, I was sitting in a meeting and reached for the dispenser of Purell hand sanitizer sitting on the conference room table. A colleague of mine gave a small, rueful shake of her head to the person on her other side. Apparently I had erred. I asked what was the matter, and got a brief answer to the effect of “because superbugs.” We exchanged nothing more about it; the interaction was over before the alcohol had dried from my hands.
I wouldn’t have thought anything of such an interaction with anyone else, but my colleague is a PhD student in immunology, six years older and more schooled than I, doing her doctoral research in a lab run by a physician-scientist — a specialist in infectious disease, no less. A touch ironic.
And so I noticed a need for some mythbusting: alcohol-based hand sanitizers do not breed resistant bacteria. (more…)
(Editor’s note: I was away at Skepticon over the weekend, where I gave a talk entitled “The Central Dogma of Alternative Medicine”. (When the talk’s up on YouTube, I’ll provide a link, of course.) Because of all the fun and travel delays I didn’t get a chance to turn my slides and notes into a blog post yet. Also, I’m on vacation this week. However, this gives me the opportunity to resurrect a blog post from 2007 on my not-so-super-secret other blog, because I think the concept is interesting. I even use it in a slide that shows up in many of my talks (above). I’ve updated dead links and added some text to include relevant links to posts written since. Enjoy, and I’ll definitely be back next week with original material, if not sooner, given that there are others here who might have the temerity to take part or all of this week off.)
I wish I had thought of this one, but I didn’t. However, I never let a little thing like not having thought of an idea first to stop me from discussing it (even if Steve Novella’s also discussed it), and this particular idea is definitely worth expanding upon because (1) it’s interesting and (2) it combines two of my interests, alternative medicine and evolution. I agree with parts of the idea, but it’s not without its shortcomings. Indeed, I’d very much welcome any of the evolutionary biologists who read this blog to chime in with their own ideas.
A colleague of mine, Martin Rundkvist over at Aardvarchaeology, has proposed a rather fascinating idea regarding the evolution of alternative medicine in which he argues that alternative medicine evolves according to certain selective pressures. As you may or may not know, evolution is not just for biology, but has been proposed as a mechanism in cultural memes, for example. Since alternative medicine is a cultural phenomenon, it is not unreasonable to look at such non-evidence-based medicine and hypothesize what might be the selective pressures that shape its popularity and evolution. After all, if we’re going to discourage the use of non-evidence-based medicine or even quackery, it’s helpful to understand it. We already know that alt-med terminology has evolved considerably into the current preferred term, “integrative medicine.” (See also the image above and my blog posts on this evolution here and here.)
EDITOR’s NOTE: There are three Addendums after this post, containing the complete text of e-mails.
EDITOR’s NOTE #2 (8/19/14 4:51 PM): There is one more Addendum, as Dr. Arguello has sent me another e-mail.
EDITOR’s NOTE #3 (8/20/14 7:18 PM): There is yet another Addendum, as Dr. Arguello is now complaining to my place of work.
EDITOR’s NOTE #4 (8/21/14 5:30 PM): And the beat goes on. See Dr. Arguello’s next e-mail.
The following post will be of a type that I like to refer to as “taking care of business.” That’s not to say that it won’t be, as my posts usually are, informative and entertaining, but it does say that I’m doing it instead of what I had originally had in mind because something came up. That something is a rather unhappy e-mail from the doctor about whom I wrote three weeks ago. It’s just an indication that, although it’s a great thing that this blog is becoming more and more prominent, it’s also a two-edged sword. People actually notice it when I (or other SBM bloggers) criticize them for dubious medicine. We see this in how Dr. Edward Tobinick has launched what I (and many others) consider to be a frivolous lawsuit against SBM founder Steve Novella over a post from 2013 clearly designed to silence criticism. It’s legal thuggery, pure and simple. That’s the bad end of the spectrum. I’ve been at the receiving end of similar retaliation that could have just as bad an impact on me personally as far as my career goes when antivaccine activists tried to get me fired from my job four years ago.
The more common (and far less agita-inducing) end of the spectrum consists of e-mails or letters of complaint. Sometimes they come from eminent radiologists who don’t like my criticism of their attacks on mammography studies. (Actually, truth be told, it is rarely eminent radiologists—or eminent physicians and scholars—who complain.) More commonly, it’s practitioners who object to how their treatments have been described. This time around, it’s a man named Dr. Frank Arguello, whose “atavistic chemotherapy” I criticized in one of my typical long posts that also explained why. Last week, I received this e-mail from Dr. Arguello:
In 1850, one in four American babies died before their first birthday, and people of all ages died of bacterial infections that could have been successfully treated today with antibiotics. Unfortunately, treatments that have effects usually have side effects, and we are seeing problems due to the overuse of antibiotics. They are given to people with viral infections for which they are useless and to food animals to improve their growth. As a result, antibiotic-resistant organisms are evolving and the development of new antibiotics is not keeping up with the threat. This is common knowledge, but we’re starting to realize that there may be other problems with antibiotics even when they are used correctly to save lives.
The rates of obesity, diabetes, asthma, food allergies, hay fever, eczema, inflammatory bowel disease, celiac disease, acid reflux disease, and esophageal cancer are all on the rise. Martin Blaser, MD, director of the Human Microbiome Program at NYU, thinks antibiotics may be to blame, either as a causal or a contributing factor. In his book Missing Microbes: How the Overuse of Antibiotics Is Fueling Our Modern Plagues, he describes some of the fascinating research he and others have been doing to elucidate the role of the more than 100 trillion microbes that live on and in each of us, and the possibility that antibiotics may have a causal role in several of the so-called diseases of civilization. (more…)
Depression affects approximately 10% of Americans. It can be fatal; I found estimates of suicide rates ranging from 2-15% of patients with major depression. When it doesn’t kill, it impairs functioning and can make life almost unbearably miserable. It is a frustrating condition because there is no lab test to diagnose it, no good explanation of its cause, and the treatments are far from ideal.
Jonathan Rottenberg is a psychologist and research scientist who began to study depression after his own recovery from a major depressive illness. He teaches psychology at the University of South Florida, where he is the director of the Mood and Emotion laboratory. He has launched the Come Out of the Dark campaign to start a better, richer national conversation about depression. In a new book The Depths: The Evolutionary Origins of the Depression Epidemic, he reviews insights from recent experiments and asks a number of difficult questions, such as why humans evolved to be subject to incapacitating depressions. He comes up with some startling hypotheses, including the idea that evolution favored depression because of its survival value and that depression is essentially a good thing. He offers his ideas as the basis of a paradigm shift. (more…)
I had originally planned on writing about a different topic today, but, as is so often the case in blogging, something came up that caught my attention, much as the errant thought of a squirrel distracts Dug the Dog. It’s no big deal. My original topic is not time-sensitive, and I’ll get to it next week (that is, unless something like this happens again). In any case, my tendency towards blogging ADHD notwithstanding, the “inspiration” for this post began on Friday morning, making it timely. Let me tell you what happened, and then I’ll delve into the topic.
We all have our daily rituals, and I’m no different. When I wake up in the morning, I usually check my iPhone to see how many e-mails I’ve gotten overnight. If there’s time before I have to leave for work, I’ll frequently go through them all right then, answering ones I can answer quickly and filing for later responses those that I can’t. If I don’t have time (as in I overslept), I’ll check them whenever I get an opportunity. Last Friday, I was rather surprised to see that the little badge on the Mail app showed well over three times the usual number of messages I get overnight, even accounting for e-mail notifications of comments on the blogs and the usual smattering of mailing list messages and the odd junk spam that got through the filters. So having that many messages in my unread mail queue caught my attention. Even when a new troll shows up in the comments of one of the blogs, I usually don’t get that many notifications. I figured I’d better go and check to see what was going on right then, rather than waiting until later. What I found was something that I never would have guessed.
As odd as it seems to me now, I had apparently been targeted by a Change.org petition Animal Experimenters – JUSTIFY YOUR SCIENCE CLAIMS. (more…)
Science is intended to discover the “is”, not the “ought;” facts, not values. Science can’t tell us whether an action is moral; it can only provide evidence to help inform moral decisions. For instance, some people who believe abortion is immoral reject birth control methods that prevent implantation of a fertilized ovum on the grounds that it constitutes abortion; science can determine that a particular birth control method prevents fertilization rather than preventing implantation of a fertilized ovum. A new book, Moral Tribes: Emotion, Reason, and the Gap Between Us and Them, by Joshua Greene, provides some intriguing insights that are pertinent to medical ethics.
He thinks tribalism is the central tragedy of modern life. Evolution equipped us for cooperation within our own tribe but not for cooperation with other tribes. Cooperation with related individuals helps spread our own genes, but we are in competition with other tribes and cooperating with them might help spread their genes to the detriment of our own. It boils down to Us vs. Me and Us vs. Them. He uses the word “tribes” not in the original sense (Hutus vs. Tutsis), but to include Democrats vs. Republicans, Catholics vs. Protestants, CAM vs. science-based medicine, Arabs vs. Israelis, climate change activists vs. climate change deniers, and any other ideological or nationalistic group. (more…)
A man of science rises ever, in seeking truth; and if he never finds it in its wholeness, he discovers nevertheless very significant fragments; and these fragments of universal truth are precisely what constitutes science.
~ Claude Bernard.
I almost never have to search for material for this blog. The Secret always seems to provide topics. Subject matter appears unbidden out of the ether. But not this week. I enjoy deconstructing the nonsense of SCAM papers or blog entries more than any other type of blog entry. Perhaps the glee that last week’s entry provided had to be countered by some kind of cosmic balancing mechanism. Although the rational part of my mind objects to the personification of random existence, I suppose the Universe just does not want me to have that much fun two entries in a row. Probably explains why I have a viral URI and my brain has slowed almost to the point of functional inactivity. There is no shortage of SCAMs to write about, they are just not created equal in their ability to generate a passionate rant. (more…)
In the past I have criticized evolutionary medicine for its tendency to rely on unverifiable “Just-So Stories,” but a new book has helped me appreciate what the best kind of evolutionary thinking can contribute to our understanding of medicine. Doves, Diplomats, and Diabetes: A Darwinian Interpretation of Type 2 Diabetes and Related Disorders by Milind Watve investigates diabetes from an evolutionary perspective, suggesting how it might have originated, why it persisted, and how it is related to survival advantages. Watve develops well-reasoned hypotheses that can be tested by examining their expected consequences. He believes it is impossible to understand metabolism without understanding behavioral ecology, and he makes a good case.
A reassessment of the evidence concerning Type II diabetes (T2D) reveals a number of paradoxes. Elevated blood glucose is the defining feature of T2D but controlling it doesn’t prevent all the complications of diabetes, and it doesn’t appear that elevated blood sugar could produce all the pathological changes of diabetes. Insulin resistance is believed to be central to a cluster of deadly diseases in humans, but in other animals it has no adverse effects on health and even increases lifespan. Studying diabetes from an evolutionary perspective can shed light on such paradoxes. (more…)