Microbe Matters Book Club: The Coming Plague by Laurie Garret

Cover of "The Coming Plague: Newly Emergi...For this installment of book club I am happy to introduce The Coming Plague: Newly Emerging Diseases in a World out of Balance by Laurie Garret.

Written in 1994, this is an impressively well researched work on the current microbiological topics of the time. While this book is almost 20 years old, I was very impressed by how many of our current problems in health care were covered in these 620 pages and how well the content has held up to the passage of time.

What is even more impressive is how the author narrates the stories, giving a more human side to the factual recounting of disease outbreaks that most of us in the microbiology community are familiar with.

This book is arranged so that each chapter covers a specific disease or theme. Notable chapters on exotic pathogens include those on Bolivian Hemorrhagic fever, the Ebola virus, Lassa fever, the Legionnaires’ disease outbreak in 1976, and the Hantavirus outbreak in the 4 corners region of the United States. These are all fascinating chapters as many of the people who were present for these events were interviewed and there is a real sense of the fear and confusion that accompanies the outbreak of unknown diseases.

These chapters also show “disease cowboys” in action during these outbreaks, scrambling to find out the causative agent or vector for these diseases. As someone who has just learned how to work in a Biosafety level 3 lab I can only imagine the difficulty involved in doing any kind or research in the field, let alone in with diseases that are known to be highly lethal.

The author does an excellent job of showing how environmental, social, and political factors drive the emergence of disease in human population. No other chapter covers this intersection quite as well as well as her work on the early years of the HIV epidemic. With 30 years separating me from this period in time it is easy to not think about how we got to where we are today with HIV; during my life it has always been here. It was eye-opening to see just how badly the epidemic was handled by politicians of the day or how distinguished scientists could fight so readily over discoveries relating to this new viral plague.

Overall, I highly recommend this book to anyone looking for a more in-depth and extremely well written take on the challenges we face against the invisible armies of microbes that continually surround us.

Rock Your Recruitment

It’s that time of year again!

Some of you reading this article are about to start your first round of graduate school interviews this spring. Many of these interviews will take place during what is known as recruitment weekend. However, this is a much different process than your standard job interview and you should be aware that there are some key differences between the two. While much of this advice comes from my own experience in the sciences and will vary according to your program, there are some basic themes to be aware of. Continue reading Rock Your Recruitment

Tiny particles with big consequences: The number of viruses it takes to start an infection

 

Hepatitis virions, of an unknown strain of the...
Hepatitis virions (Photo credit: Microbe World)

My last post was written to introduce the concept of quasispecies in an RNA virus population.

This article will further expand on the topic and show how the quasispecies concept was used with powerful genetic sequencing technology to figure out a specific question: How many hepatitis C virus particles does it take to start an infection in humans? Continue reading Tiny particles with big consequences: The number of viruses it takes to start an infection

The Concept of Quasispecies

RNA Polymerase
RNA Polymerase (Photo credit: ynse)

Today’s topic is directly related to my own research with RNA viruses and is what I consider a very interesting topic: quasispecies.

Many of us are familiar with the concept of a species at the macro (visible) scale. Dogs are dogs; pigs are pigs, and so on. Each is a distinct species based on the fact that they can only reproduce and generate fertile offspring with other members of the same species. Over the course of many generations mutations may arise in these populations which lead to different genotypes in the species. Left long enough, these two subpopulations may keep mutating to the point where they can no longer interbreed and become their own genetically distinct species. However, when you get down to the viral scale species becomes a much more difficult concept. Viruses don’t have sex in the traditional sense, so how can they be a species?

Continue reading The Concept of Quasispecies

Going against the herd: The importance of mass immunity in society

Poster from before the 1979 eradication of sma...
Poster from before the 1979 eradication of smallpox, promoting vaccination. (Photo credit: Wikipedia)

Why is it that members of the public health community are worried about falling vaccination rates in the US when getting vaccinated is treated as a largely personal choice? Do our personal health decisions for ourselves and our children have an impact on the health of society as a whole?

The answer to this is that yes, our individual decisions do matter to society when it comes to combating the spread of contagious disease.

A large part of this is herd or community immunity; the way in which mass immunity in a population can control the spread of disease among individuals. Herd immunity is a major reason behind why so many deadly diseases have all but disappeared from American society; our vaccination rates protect many of those who are unvaccinated from contagious diseases. However, this is beginning to change in the US and we are beginning to see outbreaks of diseases that have not been of major clinical concern for decades.

Read on to find out more on how herd immunity and how it protects vulnerable members of society. Continue reading Going against the herd: The importance of mass immunity in society

Ask a Microbiologist #3: What’s in the almond milk?

Today’s installment of Ask a Microbiologist comes from a reader wondering what might be in that old almond milk in the fridge:

English: Raw Almond Milk
Raw Almond Milk (Photo credit: Wikipedia)

“I found an open container of almond milk in my fridge the other day and it was OLD – I’m talking it had been opened for at least a month at this point. I know that as soon as it’s opened, the pasteurized almond milk is immediately primed for bacterial breeding. I was just curious as to which pathogenic (entero) bacteria are most likely to colonize at this point; I’m curious because there were zero indications of growth (ie no swelling of the container and no abnormal smells, colors, or textures).”

-Wondering what’s in there

Well WWIT, I’m glad you asked this, as I was starting to wonder about my soy milk as well.

This is a very open ended question and three main ways to inoculate your drink that could potentially lead to different contaminating microbes, some of which could be pathogenic. Continue reading Ask a Microbiologist #3: What’s in the almond milk?