History Medicine Science

Thinkers everywhere are conscious of two things, first, that the region of mystery has never before been so clearly defined, and secondly, that that region can be entered more easily than has hitherto been the case; it may, therefore, perhaps be induced to render up some of its secrets if investigators of all schools pursue their search with determination.

In 2009, an influential panel of medical experts ignited a controversy when they recommended that most women should not begin routine mammograms to screen for breast cancer until the age of 50, reversing guidelines they had issued just seven years before when they recommended 40 as the optimal age to start getting mammograms. Many women’s groups, health care advocates, and individual women saw the guidelines as privileging financial considerations over women’s health and a setback to decades-long efforts to reduce the mortality rate of breast cancer.

Lyme disease is an infectious disease caused by the bacteria Borrelia burgdorferi. B. burgdorferi is transmitted to humans by a bite from an infected black-legged or deer tick. The tick becomes infected after feeding on infected deer, birds, or mice. A tick has to be present on the skin for at least 36 hours to transmit the infection. Many people with Lyme disease have no memory of a tick bite.

The great scientists Louis Pasteur (1822-1893) and Joseph Lister (1827-1912) revolutionized medical practice in the 19th century. Pasteur's discovery of the cause of fermentation formed the basis of modern germ theory while Lister developed antiseptic surgical methods based on that. The book contains a description of the theory, and accounts of their work and experiments.