- Ricketts, Howard T(aylor)
born Feb. 9, 1871, Findlay, Ohio, U.S.died May 3, 1910, Mexico City, Mex.U.S. pathologist.He received his medical degree from Northwestern University. He discovered the bacterium (named rickettsia) that causes Rocky Mountain spotted fever and epidemic typhus. He demonstrated in 1906 that the former could be transmitted by the bite of a certain tick and identified a bacterium in the blood of infected animals, in the ticks, and in their eggs. He found that epidemic typhus in Mexico was transmitted by a louse and found a related bacterium in the victim's blood and in the lice. He transmitted the disease to monkeys, which developed immunity. He died of typhus later that year.
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Ricketts, Howard T(aylor) — (9 feb. 1871, Findlay, Ohio, EE.UU.–3 may. 1910, Ciudad de México, México). Patólogo estadounidense. Se graduó de médico en la Universidad de Northwestern. Descubrió la bacteria (llamada rickettsia) que causa la fiebre manchada de las Rocosas y… … Enciclopedia Universal
Howard — Howard, Ebenezer Howard, Leslie ► Noble familia inglesa del s. X. A ella pertenecen los condes de Norfolk, de Suffolk, de Northampton y de Nottingham. * * * (as used in expressions) Aiken, Howard H(athaway) Armstrong, Edwin H(oward) Bearden,… … Enciclopedia Universal
Taylor — Taylor, Brook Taylor, Elisabeth Taylor, Frederich Winslow Taylor, Robert Taylor, teorema de * * * (as used in expressions) Coleridge, Samuel Taylor Farnsworth, Philo T(aylor) Ricketts, Howard T(aylor) Taylor, Dame Elizabeth (Rosemond) Taylor,… … Enciclopedia Universal