Ricketts, Howard T

Ricketts, Howard T

▪ American pathologist
born Feb. 9, 1871, Findlay, Ohio, U.S.
died May 3, 1910, Mexico City, Mex.

      American pathologist who discovered the causative organisms and mode of transmission of Rocky Mountain spotted fever and epidemic typhus (known in Mexico, where Ricketts worked for a time and died of typhus, as tabardillo).

      Ricketts graduated in medicine from Northwestern University, Chicago, and in 1902 joined the faculty of the University of Chicago. In the spring of 1906 he demonstrated that Rocky Mountain spotted fever could be transmitted to a healthy animal by the bite of a certain tick. Two years later he described the causative microorganism; he found it in the blood of the infected animals and also in the ticks and their eggs.

      In 1909 Ricketts and his assistant, Russel M. Wilder, went to Mexico City to study epidemic typhus. They found that it was transmitted by the body louse (Pediculus humanus) and located the disease-causing organism both in the blood of the victim and in the bodies of the lice. Before he succumbed to typhus later that year, Ricketts showed that the disease could be transmitted to monkeys, which, after recovering, would develop immunity to the disease. In memory of Ricketts, the genus rickettsia was established for the causative organisms that he had identified.

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Universalium. 2010.

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  • 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… …   Universalium

  • 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 Taylor Ricketts Award — Howard Taylor Ricketts Der Howard Taylor Ricketts Award ist eine wissenschaftliche Auszeichnung, die jährlich von der University of Chicago vergeben wird. 1912 stiftete die Witwe des Pathologen Howard Taylor Ricketts (1871–1910), Myra Tubbs… …   Deutsch Wikipedia

  • Howard Taylor Ricketts — (* 9. Februar 1871 in Findlay, Ohio; † 3. Mai 1910 in Mexiko Stadt, Mexiko) war ein US amerikanischer Pathologe. Er studierte Medizin an der Northwestern University in Evanston …   Deutsch Wikipedia

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