February 15, 2013
The Pathogens on Cupid’s Arrow
“Love is a burning thing
On Valentine’s Day some think of chocolate, or wine, or flowers. Physicians think of sexually transmitted infections (STIs). This week with perfect timing, the Centers for Disease Control and Prevention (CDC) released two studies quantifying the burden of STIs in the U.S. The studies estimated the nationwide burden of eight STIs – chlamydia, gonorrhea, syphilis, genital herpes, human papillomavirus (HPV), hepatitis B, HIV, and trichomoniasis. The results showed that there are about 20 million new cases of these STIs annually, and that the prevalence of STIs, that is the number of new and existing infections at a given time, is 110 million. Over half of the STIs, both in terms of new infections and prevalent infections, are due to HPV, the virus that can cause genital warts and cervical cancer. And most of the infections are in young people between the ages of 15 and 25. How romantic!
As if that wasn’t enough to throw a wet blanket on the national mood, this week’s Morbidity and Mortality Weekly Report followed up on a story I first wrote about a year ago – the emerging threat of multi-drug resistant gonorrhea. Gonorrhea remains a serious public health threat in the U.S. with over 300,000 new cases reported in 2011. Peruse my post from a year ago for the detailed history of the gonorrhea bacterium repeatedly overcoming whichever antibiotic we use against it. Since the 1940s gonorrhea has developed resistance to sulfanilamide, penicillins, tetracyclines, and most recently fluoroquinolones. That leaves cephalosporins as the last family of antibiotics uniformly effective against gonorrhea.
This week’s report warns that strains of gonorrhea resistant to cephalosporins have been isolated in Japan, France, and Spain in the last few years. Strains in the U.S. remain sensitive to cephalosporins, but laboratory measures of cephalosporin sensitivity in isolated strains are slowly decreasing. No other effective antibiotic alternative is on the horizon, so the appearance of cephalosporin-resistant gonorrhea may essentially mean the appearance of untreatable gonorrhea. How romantic!
So as we approach the end of the antibiotic century, perhaps we should all try to rediscover the virtues of monogamy. That may sound quaintly retrogressive, but no more so than the notion of having no treatments for common infections.
“You must remember this
'Ongoing, severe epidemic' of STDs in US, report finds (Vitals, NBC News)
My last post about multi-drug resistant gonorrhea: Untreatable Gonorrhea – The Next Infectious Threat
Important legal mumbo jumbo: