Tag Archives: bacteria

Antibiotic Treatment Course…to finish or not to finish?!

Have you ever taken antibiotics for any infections? I’m sure most of you have… have you been told to finish the course of treatment even after you feel better? This has been the traditional approach to antibiotic treatment for many years. The common belief is that, not completing the course of treatment would cause the bacteria to mutate and become resistant to the antibiotic. This belief was questioned by a study published in 2017 claiming that there is little to no evidence supporting the idea that not completing a prescribed antibiotic course results in antibiotic resistance; while many studies suggest that taking antibiotics more than necessary increases the chance of antibiotic resistance.

The common belief is that failure to complete the course of antibiotic treatment can result in antibiotic resistance. A new study has questioned this belief. Image from Pixabay

The study by Martin Llewelyn, a professor in infectious diseases at Brighton and Sussex medical school, and colleagues published in the British Medical Journal became controversial as it claimed that this idea has arisen from the “fear of undertreatment” in the early years of antibiotic discovery. The article suggested that “[policy makers, educators, and doctors] should publicly and actively state that this was not evidence-based and is incorrect.” Many experts agreed with these findings. Alison Holmes, a professor of infectious diseases at Imperial College London, in agreement with this article mentioned that a great British authority, Professor Harold Lambert had made the same point in an article in 1999. This article states that since the optimum duration of antibiotic treatment for infections are unknown, patients should stop taking antibiotics when they feel better to avoid antibiotic resistance.

Martin Llewelyn and colleagues claim that there is no evidence for completing the course of antibiotic treatment and patients should stop taking antibiotics once they feel better. Image from Pixabay

On the other hand, many disagree with this claim. Sumanth Gandra, a physician, claims that although it is true that an antibiotic treatment course should be reduced to minimum, the only way to minimize antibiotic use responsibly, is by clinical trials to assess the optimal treatment lengths for different infections. Moreover, patients should not stop their antibiotics without consult with their physicians. The US Food and Drug Administration (FDA) and World Health Organization (WHO) still strongly encourage the public to follow the instructions of their physician and finish the course of antibiotic treatment.

Health organizations strongly encourage the public to follow the instructions of their physicians and finish the course of antibiotic treatment. Image from Shutterstock

Antibiotic resistance is an important topic in today’s society and there are several different opinions about the causes of antibiotic resistance. Despite these disagreements, I think it is our responsibility as the educated public to follow the instructions and suggestions of authorities and experts in institutions such as WHO and advise others to do so.

Could Eating Protein Be Bad?

What would it take for you to give up eating meat?

A recent study published last Monday reported that limiting nitrogen levels in our large intestines could control the amount of bacteria growing in there.  From 30 animal feces samples that Dr. Reese and her team of scientists at Harvard University measured, they found that meat-eaters’ feces contained more nitrogen than those of omnivores or herbivores.  That’s because protein contains nitrogen.  Lots of it.

This means that when you eat protein, you’re  literally feeding the bacteria in your intestines with nitrogen.  Believe it or not, over 1000 different species of bacteria live in our largest intestines alone.  Luckily, most microbes – short for microorganisms – in our bodies help in processing food waste and regulating immunity.  In fact, intestinal bacteria that typically live in our large intestines play a vital role in metabolic activities, such as fermentation.  Fermentation essentially describes the breakdown of carbohydrates into smaller molecules known as fatty acids.

Electron Micrograph of E. coli. Image from Flickr.

So in these cases, it would actually be beneficial to make sure that these good bacteria thrive.  Otherwise we wouldn’t be able to break down the fibres found in oats, barley, and quinoa.  To promote bacterial growth, we should eat more meat and eggs, or beans and tofu if you are a vegetarian, to increase our intake of protein.

But occasionally we house harmful parasite like salmonella which cause intestinal infections.  Salmonella is an invasive bacteria that’s usually associated with consuming contaminated or raw eggs and chicken.  As a result, you would often get diarrhea and stomach cramps.

Then eating meat would have a negative impact on your body.  Since protein contains high levels of nitrogen, bacteria would feed off the same nutrients that your body requires.  Not only do parasites compete with the good bacteria residing in our intestines for growth, but by allowing parasites to thrive and manifest itself, we become more ill.  Under these circumstances, you probably want to stay away from eating all foods high in protein to be safe.

For someone who loves to eat sushi and Korean barbeque, it would devastate me too much to stop eating fish or meat.  Besides, there are probably more friendly bacteria than parasitic bacteria otherwise we would constantly feel ill.  Next time, I’ll make sure to properly cook all meats and minimize cross contamination as much as possible so that I don’t contract any harmful bacteria.

A steak dinner. Image from Flickr.

So would you eat less protein after Dr. Reese’s study suggests that this would help limit bacteria’s growth in our large intestines?

– Jacqueline Zheng