Bacteria are winning the antibiotic war, because we are giving them all the information they need to win. How does this happen? Bacteria have been learning how to resist the antibiotics we have been taking for viral infections. ANTIBIOTICS CANNOT, DO NOT WORK AGAINST VIRAL INFECTIONS. Don’t believe me?
See the CDC Get Smart campaign:
Antibiotics do not fight infections caused by viruses like colds, most sore throats and bronchitis, and some ear infections. Unneeded antibiotics may lead to future antibiotic-resistant infections. Symptom relief might be the best treatment option.
or warnings from the NIH:
If a virus is making you sick, taking antibiotics may do more harm than good. Each time you take antibiotics, you increase the chances that bacteria in your body will be able to resist them. Later, you could get or spread an infection that those antibiotics cannot cure.
Or alerts from the Mayo Clinic:
Antibiotics: Misuse puts you and others at risk
What are viral infections? According to the CDC, bronchitis is most commonly caused by a number of viruses, and only RARELY, bacteria
Causes of Bronchitis
- Several types of viruses, most often:
- Respiratory syncytial (sin-SIH-shull) virus (RSV)
- Bacteria, in rare cases
- Pollutants (airborne chemicals or irritants)
So based on the above, if you have bronchitis, antibiotics won’t help, and may actually hurt you.
Why is this important? Because bacteria are learning how to subvert the action of antibiotics and are spreading the message to other bacteria. We are losing our wonder drugs because…we think we can self diagnose and that antibiotics are useful in all situations.
Again, the words superbugs SHOULD alarm you.
In a very good article, USA TODAY describes how hospitals across the US are fighting a “Superbug” war. What is a superbug? It is a bacterium that has gained the ability to be resistant to almost all available antibiotics. The article discusses CRE bacteria. In class I have discussed the NDM-1 plasmid which encodes an enzyme called carbapenemase, which cleaves carbapenam antibiotics (which up until now had the been the antibiotic of last resort for extensively resistant bacteria). Both CRE and NDM-1 are not examples of specific bacteria, but of genes that can transfer resistance to a wide array of bacteria. Any bacterium containing the genetic information would be resistant. Examples are that both E. coli and Klebsiella pneumoniae are identified as CRE bacteria.
How does this happen? The animation in the USA Today story is perfect. We take an antibiotic that a SINGLE bacteria may be resistant to. Then, that one bacterium can do one of two things. They can simply grow to fill in the spaces left by the sensitive bacteria, or they can use horizontal gene transfer to transfer antibiotic resistance to other bacteria that hadn’t been antibiotic resistant. Horizontal gene transfer is the ability of bacteria to share genetic information with other bacteria in a population. (Vertical gene transfer is what happens normally when a bacterium divides and replicates it genetic information for its daughter cells). The animation details horizontal gene transfer with both transposons transferring resistance as well as conjugative plasmids via conjugation.
In class, we discuss that once a bacterium gains a conjugative plasmid, it WANTS to share the information with other bacteria. This can create an entire army of bacteria that are superbugs. Where is the best place for this to happen? The human gut is a great place for bacteria to get together and exchange information.
How quickly can this spread? According to the article:
the first known case, at a North Carolina hospital, was reported in 2001, CREs have spread to at least 41 other states
The NDM-1 was first identified in Swedish patient who had visited India for surgery in 2008 and bacteria containing this plasmid has been found in:
India, Pakistan, the United Kingdom, the United States,Canada,Japan and Brazil.
Currently, CRE and NDM-1 bacteria are found primarily in hospital settings. But the concerns are that, similarly to MRSA, these organisms will become more common outside the hospital among the general population, creating a serious healthcare problem that won’t…can’t…be treated with any currently antibiotic therapy.
There is a great article in the online magazine Ars Technia that details influenza viral replication and structure. It is essentially a re-print from a post from the epidemic of 2009 (there are a few details at the beginning regarding this year’s virus). However, what is there, is very good. It details how the virus replicates, what the H and N stand for in the viral names (hemagglutinin and neruaminidase) as well as how the virus infects.
If anyone in your family wants to know and understand influenza a little better this is a great article. One of the reasons I especially liked this article is because it details the fact that this is an RNA virus. More specifically, this virus needs not one, but requires THREE RNA dependent RNA polymerases (RDRPs) in order to make infectious virions:
Finally, the influenza virus’ genome exists as RNA, rather than DNA, and the (host) cell’s enzymes are not prepared to duplicate that or transcribe it into the messenger RNAs that get made into proteins. So, the flu virus brings its own, with three genes encoding RNA-dependent polymerases.
The article states that the best strategy for preventing the flu is a vaccine (killed or live attenuated), but that isn’t 100% effective (actually only 67% effective this year). If you do get the flu, this is a the best advise on what to do as holistic therapy in a site from the U.S. government:
You can treat flu symptoms without medication by:
- Getting plenty of rest
- Drinking clear fluids like water, broth, sports drinks, or electrolyte beverages to prevent becoming dehydrated
- Placing a cool, damp washcloth on your forehead, arms, and legs to reduce discomfort associated with a fever
- Putting a humidifier in your room to make breathing easier
- Gargling salt water (1:1 ratio warm water to salt) to soothe a sore throat
- Covering up with a warm blanket to calm chills
Little by little we are beginning to understand that Granny was WAY ahead of us in common sense treatments that actually work.
I tell my students that humans are essentially a donut. Around the outside of the donut, we have our wall (skin/epidermis) which separates the outside and inside. We humans know and expect to find bacteria there. But what people don’t think about is that the donut hole, or the tube down the middle of you that connects your mouth to your anus, is essentially outside, meaning it is full of stuff that simply passes through your body as well as a huge number of bacteria. The overall ratio of bacteria cells to human cells is about 10 to 1.
These bacteria that are found on our surfaces and in our tube have historically been called commensal organisms: they benefited from us but did not help their human hosts. But not even Wikipedia calls them that anymore. This is because we now know that these microbes that colonize our skin and donut tube may be essential for human health. We now call them our “human microbiome“. We are just beginning to understand that an intact microbiome can be as important as your immune system in keeping you healthy. You can think of our microbiome as the organisms that we are just beginning to understant protect us in a myriad of ways. One is simple one is to keep bad bacteria from getting established and running amok.
We now are aware that in fighting some deadly bacterial infections, we cause calamities in our microbiome. The antibiotics that are targeting pathogenic bacteria will also act on our essential gut bacteria. When our microbiome is decimated this opens space for deadly invaders (such as Clostridium difficile, also known as C. diff) to gain a foothold. The problem with C. diff specifically is also that it is also very resistant to antibiotics.
Historically we have treated life threatening C. diff infections with higher and more dangerous levels of antibiotics. A wonderful new article in the New York Times details the trials and tribulations of a C. diff infection as well as a new and exciting cure for this deadly infection.
Fecal transplants. Wait a minute. This is nothing any different than using a healthy microbiome as therapy/treatment. Yes, this therapy sounds disgusting, but we now understand that these bacteria, our microbiome, are fundamentally a PART OF US, an essential component to human health. Transplanting a microbiome is no different than any other form of transplantation where you take healthy tissue from one individual and give it to another. Physicians should stop using fecal and start using a microbiome transplant.
Research detailed in the New England Journal of Medicine describe the amazing results using
fecal microbiome transplants. From the NYT article:
(fecal) transplants cured 15 of 16 people who had recurring infections with Clostridium difficile bacteria, whereas antibiotics cured only 3 of 13 and 4 of 13 patients in two comparison groups.
Amazing. 15 of 16. In another part of the NYT article they describe the symptoms of one patient in the study:
Melissa Cabral, 34, of Dighton, Mass., was healthy until she contracted C. difficile in July after taking an antibiotic for dental work. She had profuse diarrhea, uncontrollable vomiting and high fevers that landed her in the hospital. She suffered repeated bouts, lost 12 pounds and missed months of work. Her young children would find her lying on the bathroom floor.
They treated her without success with antibiotics. Within ONE DAY of a
fecal microbiome transplant she was cured. ONE DAY.
The article from the New York Times is wonderful. It describes C. difficile, exactly what a
fecal microbiome transplant consists of, as well as lots of fabulous reporting.
We are now essentially entering a new golden age of microbiology. This will show not just how bacteria can cause disease, but how bacteria can make us healthy. Stay tuned. This is going to be a wonderful ride.
How long should you have a cough following bronchitis? There was a great new article (I encourage you to read the actual article: link) in USA Today detailing that a large majority of individuals don’t know the answer to this question. These individuals get colds and coughs that last longer than they THINK they should.
The title of the article is perfect: Coughing for Two Weeks? You still don’t need an antibiotic.
The article is actually detailing research published in the Annals of Family Medicine. From that research , most people think they should be over a cough in 7-8 days. However, a cough caused by acute cough illness (ACI) commonly diagnosed as acute bronchitis, normally lasts upwards of 18 days.
This research then details that if the cough lasts longer than what is expected, we self-diagnose with a more severe disease such as pneumonia.
This is “because it isn’t normal for a cough to last that long”. This last sentence is a direct quote from my sister with this exact problem. She had a cold. Her cough lasted longer than what she thought it should. She then made an appointment with a doctor, who told her she had a cold, did NOT have pneumonia or any other serious problem.
He then prescribed her an antibiotic to take if she wanted to, or if she felt it was necessary. She called me because she knows I am a fanatic about improper use of antibiotics. What did I tell her to do? I asked her how bad her cough was (Not bad, but it had been going on since New Years). I asked her what her doctor said (no pneumonia, probably a cold). Then I told her to hang on to the prescription, but to get rest, drink a lot of fluids and eat chicken soup. I guaranteed her that she would feel better in three days without antibiotics.
Did she get better? Absolutely. Did she need antibiotics? Absolutely not. What was the best prescription for her? It really comes down to that so many of the things your Granny told you to do (as well as the Mayo Clinic) were right. Get lots of fluids, plenty of rest (this may actually mean taking a couple of days off work!! Yes, they will survive without you for a few days) and eat chicken soup.
More on this as the cold and flu season progresses.
In class we have been discussing sexually transmitted diseases. Today, I found an email from the CDC which directed me to a lovely, thoughtful video about sexual health. I have talked, admonished and advocated for taking your own responsibility for your sexual health. Again, if you cannot ask your partner to wear a condom or discuss STDs, think again about having sex with this person.
But this is a look at some other opinions. I think you will find them insightful.
From the CDC: Let’s talk about sexual health
In class, I normally tell students that steak rarely (pun intended) transmits the strain of E.coli O157:H7 to consumers. Hamburger? Absolutely, but steak? Almost never.
The reason for this is simple. When beef is processed, it can become covered with bacteria (most of it from the intestinal tract of the animal providing the meat). When meat is processed for steak, the blade slicing through the muscle leaves a tract of bacteria on top of the meat. This is similar to using an inoculating needle on a slant of media. However, then the steak is cooked, the top layer is charred and the bacteria coating the surface is destroyed. Even if the middle is pink (or cool enough for bacteria to live), there are no bacteria there, so the food is safe.
This is NOT true for hamburger. Hamburger has the bacteria mixed through the entire contents. So that when you cook the outside, the bacteria there are destroyed. But the bacteria in the pink middle are not destroyed. This is why there is a mandate that all hamburgers should be cooked until the internal temperature is 160 degrees F ( the temperature that is necessary to kill the majority of bacteria that could exist inside the hamburger).
So why was there an outbreak of o157:H7 infection with steak identified as the culprit? The reason was that the store selling the steaks (Costco!) had tenderized the steaks using needle-like projections into the flesh. This is actually EXACTLY like using an inoculating needle to drive the bacteria into the tissue where the heating process would not kill the bacteria. And no one cooks steaks until 160 degrees. Four people became ill from eating this meat.
The Costco is not only recalling all the steaks from that processing plant, but all the ground beef as well. There is speculation that some cows carrying “higher than normal amounts of E. coli” entered the plant, and that the 0157:H7 would be in all of the products the plant produced.
Children are at more risk for this infection and Hemolytic Uremic Syndrome (the sequelae of an infection with this strain of E. coli), so if you are going to cook your hamburgers rare, at least cook them properly for your children (they won’t know what they are missing until they are older anyway).
Hey everyone, just going to try twittering about micro as well. If you have questions, send a tweet to @AskDr_C
If there is something interesting you want to report, tweet it in!
In a recent publication from the Infectious Disease Society of America (IDSA) is trying to get a wake up call to doctors about misdiagnosing Strep sore throats. From the d
most sore throats actually are caused by a virus, not streptococcus bacteria, and shouldn’t be treated with antibiotics
Their statistics say that 50% of cases are diagnosed inappropriately and given antibiotics for a viral infection.
The full guideline has been published Clinical Infectious Diseases in the but here is an important excerpt from the guideline:
If strep is suspected, the guidelines recommend physicians use the rapid antigen detection test, which provides results in a few minutes. If that test is negative, a follow-up throat culture is recommended for children and adolescents, but not for adults. Results of the culture can take up to several days, but antibiotics should not be prescribed unless results are positive, the guidelines note. Because strep throat is uncommon in children three years old or younger, they don’t need to be tested, the guidelines recommend.