Micro-biology

**__Alice Catherine Evans__** She was born in a farm in Neath, Pennsylvania. She attended the Susquehanna Collegiate Institute for a year, then became a teacher. After earning a B.S. in bacteriology from Cornell University in 1909 and an M.S. from University of Wisconsin–Madison the following year, she became a researcher at the US Department of Agriculture. There she investigated bacteriology in milk and cheese. Evans joined the United States Public Health Service in 1918, researching epidemic meningitis and influenza at the department's Hygienic Laboratories. That same year she demonstrated that //bacillus abortus// caused the disease Brucellosis (undulant fever or Malta fever) in both cattle and humans. (In 1925 she also contracted this disease and suffered from the symptoms for seven years.) Initially her results were not taken seriously (due to her gender and lack of a Ph.D.), but they were later confirmed by other scientists. This led to the pasteurization of milk in 1930, a process she had championed. As a result, the national incidence of Brucellosis was significantly reduced.
 * [[image:http://www.google.co.uk/images?q=tbn:3FmjQ7f-sUF4pM::obitz.us/obits/Index%252520E3/obit_e3_1742.jpg&h=78&w=69&usg=__hEj3BRY7fBlvDXEG533dTzXAtHw= width="69" height="78" align="middle" link="@http://www.google.co.uk/imgres?imgurl=http://obitz.us/obits/Index%2520E3/obit_e3_1742.jpg&imgrefurl=http://obitz.us/bp/NE-i.htm&h=300&w=267&sz=21&tbnid=3FmjQ7f-sUF4pM:&tbnh=116&tbnw=103&prev=/images%3Fq%3Dalice%2Bcatherine%2Bevans&hl=en&usg=__hrWjCZrbTtVPk8NgA6yau_H7WQc=&ei=hXpWS_jzJo-TkAWauK3MBw&sa=X&oi=image_result&resnum=4&ct=image&ved=0CBIQ9QEwAw"]]Alice Catherine Evans** (January 29, 1881 – September 5, 1975) was an American microbiologist.

Margret Pittman//**(1901–1995)was a bacteriologist at the Division of Biologics Standards at the U.S. National Institutes of Health.She worked on pertussisled to the development of an improved vaccination against whooping cough.
 * //__Margaret Pittman __

 //__**Dimitri Iwanowski **__// Dmitri Iwanowski publishes the first evidence of the filterability of a pathogenic agent, the virus of tobacco mosaic disease, launching the field of virology. He passes the agent through candle filters that retain bacteria, but he isn't sure that the agent is a unique organism.