Top institutions in microbiology based on impact

Based on Thomson Reuters’ Essential Science Indicators database, 1 January 1998-30 June 2008

November 13, 2008

Institution Papers CitationsCitations per paper
1 Institute for Genomic Research, US189 12,783 67.63
2 Wellcome Trust Sanger Institute, UK156 10,203 65.40
3 Princeton University, US292 10,544 36.11
4 Rockefeller University, US437 15,448 35.35
5 Columbia University, US379 12,865 33.94
6 Washington University, US770 25,048 32.53
7 Harvard University, US2,025 62,373 30.80
8 Scripps Research Institute, US640 18,914 29.55
9 University of Iowa, US683 19,987 29.26
10 Stanford University, US899 25,748 28.64
11 Technical University of Denmark, Denmark478 13,558 28.36
12 Northwestern University, US544 15,248 28.03
13 Max Planck Society, Germany1,206 33,331 .64
14 University of Pennsylvania, US921 25,415 .60
15 University of Oxford, UK1,035 28,368 .41
16 University of California San Francisco, US675 18,434 .31
17 Duke University, US553 15,044 .20
18 Natl Inst Allergy & Infectious Diseases, US1,505 40,939 .20
19 University of Washington, US1,198 32,513 .14
20 University of California Berkeley, US61116,523.04
The data above were extracted from the Essential Science Indicators database of Thomson Reuters. This database, currently covering the period January 1998 through June 2008, surveys only journal articles (original research reports and review articles) indexed by Thomson Reuters. Articles are assigned to a category based on the journals in which they were published and Thomson Reuters’ journal-to-category field-definition scheme. Both articles tabulated and citation counts to those articles are for the period indicated. Naturally, institutions publishing large numbers of papers have a greater likelihood of collecting more citations than those publishing fewer papers. This ranking is by citations per paper (impact), among those institutions that have collected 10,000 or more citations in microbiology. For papers with multiple institutional addresses, each institution receives full, not fractional, citation credit. Essential Science Indicators lists institutions ranked in the top 1 per cent for a field over a given period, based on total citations. For the current version, 298 institutions are listed in the field of immunology, meaning that a total of 29,800 institutions were reviewed to obtain these results. Of the 298, 75 institutions collected 10,000 or more citations. The ranking by citations per paper (impact) seeks to reveal “heavy hitters” based on per paper influence, not mere output. For more information on Thomson Reuters’ Essential Science Indicators, see

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