David Goodsell of the Scripps Research Institute made this lovely watercolor illustration of a cell of Mycoplasma mycoides. This bacterium is the cause of a deadly respiratory disease that affects cattle and other cud-chewing animals.
If you've ever read much about zoonoses — diseases that pass from animals to humans — then you know that the domestication of livestock played a huge role in introducing many diseases to people. Living in close proximity to the animals we ate provided ample opportunities for those animals' diseases to jump over to us. What's interesting about Mycoplasma mycoides is that it represents a disease of animals that seems to have its origins in domestication, as well.
In 2012, scientists found evidence that suggests domesticating livestock — a process that resulted in closer living conditions for the animals and in animals from one herd being moved to other herds they likely wouldn't have otherwise had contact with — helped Mycoplasma mycoides evolve and spread. Today, different species of Mycoplasma mycoides cause a range of diseases that can kill between 10 and 70 percent of the cows they infect.
Goodsell's illustration is an attempt to show all the different parts of the bacterial cell, in the shapes, sizes, locations, and concentrations that those parts take in the real world. If you go to his site, you can see a legend explaining what everything is.
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