Learning About Alcohol and Drug-Related Birth Defects

The week of May 14 is Alcohol and Drug-Related Birth Defects Awareness Week. According to the National Council on Alcoholism and Drug Dependence:

About 20% of pregnant women smoke cigarettes, 12% drink alcohol and 6% use an illicit drug at least once during pregnancy. These numbers are very alarming. If only people knew the dangers of their decisions, perhaps we would be looking at something more acceptable in those numbers.

So what are some of the dangers posed by these substances to a developing fetus?

Effects of Tobacco Use

According to the Centers for Disease Control and Prevention, the fetus gets less oxygen when the mother smokes. Smoking during pregnancy is a risk factor for low birth weight, preterm birth, placenta problems, miscarriage, and sudden infant death syndrome (SIDS).

Effects of Alcohol Use

I have written about the effects of alcohol use during pregnancy before — in fact, it was the subject for the first article I wrote for this blog.

Alcohol easily passes through the placenta, so when a pregnant woman drinks, so does her fetus. Continue reading

STD Awareness: The Curious Case of Chancroid

Haemophilus ducreyi arrange themselves in parallel rows, which researchers have called “railroad tracks,” “schools of fish,” and “fingerprints.” Image: Mike Miller, CDC

Earlier this year, I asked a room full of scientists and medical professionals to raise their hands if they’d ever heard of chancroid. Everyone sat there, motionless, confused by the odd syllables I had uttered — shan kroyd. If you’ve never heard of chancroid, you’re not alone.

Chancroid is a sexually transmitted disease (STD) brought to you by Haemophilus ducreyi, a type of bacteria that can pass through microscopic tears in the skin during sexual contact. When one partner is infected, there is a 1 in 3 chance the other will become infected. An infection can cause painful sores and swollen lymph nodes, most often in the genital region. About half of people with chancroid infections will experience “buboes,” or swollen lymph glands that might rupture. Before it could be cured with antibiotics, a persistent infection could cause permanent skin damage.


Humanity can make chancroid the first STD to go extinct.


One reason you probably haven’t heard of chancroid is that, in the developed world at least, it has mostly disappeared. In fact, researchers believe chancroid can be completely wiped off the planet — which would make it the first STD ever to be forced into extinction. How amazing would that be?

Chancroid has been hopping from loin to loin since at least the days of the ancient Greeks, and was common until the 20th century, when rates began to decline. Thanks to antibiotics, U.S. chancroid rates decreased 80-fold between 1947 and 1997, all but vanishing by the late 1950s. It was virtually unheard of until there was another spike in the 1980s, correlating with the crack epidemic. But, since 1987, cases have been steadily declining. Continue reading