Download e-book for kindle: Bacteria and Viruses (The Lucent Library of Science and by Peggy Thomas

By Peggy Thomas

ISBN-10: 1590184386

ISBN-13: 9781590184387

They're chargeable for a few of the deadliest ailments, but they play an important function in holding lifestyles on the earth. In Bacteria and Viruses, know about the scientists who chanced on them, how we struggle the damaging ones, and the way important microbes can be utilized to enhance our lives.

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Extra info for Bacteria and Viruses (The Lucent Library of Science and Technology)

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These plasmids give the bacteria certain survival skills, such as being resistant to a type of antibiotic. This means that bacteria in the same generation can potentially share advantageous plasmids, just as easily as two friends exchange phone numbers. Two bacteria can exchange a gene or genes that allow them to inhabit a new species of animal, thrive in a new climate, or protect them against a certain drug. 51 52 Bacteria and Viruses Growing Resistance The use of antibiotics creates a situation in which the fittest microbes survive.

It seemed only reasonable to blame the mysterious illness on a higher power. After all, no one could see another cause. The earliest written record suggesting that invisible living things might cause illness came from the Roman writer Marcus Terentius Varro. D. he wrote, “Care should be taken where there are swamps in the neighborhood, because certain tiny creatures which cannot be seen by the eyes breed there. ” 11 Microbes Come into View Perhaps Varro was not the only one who suspected that a living organism invisible to the naked eye could exist, let alone cause the deadly destruction that plagued humankind.

Yellow fever had been rampant and troublesome throughout Central and South America. It caused almost insurmountable problems for the builders of the Panama Canal. Cuban doctor Carlos Juan Finlay suspected that a mosquito, Aedes aegypti, spread the disease. S. Army doctor Major Walter Reed traveled to Cuba and conducted medical experiments. He discovered that the disease was caused by a filterable virus and confirmed that a mosquito was in- Early Discoveries deed the vector (it carried the virus from person to person).

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Bacteria and Viruses (The Lucent Library of Science and Technology) by Peggy Thomas

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