Top nations in microbiology

Data provided by Thomson Reuters from its Essential Science Indicators, January 1999-June 2009

November 5, 2009

 Country Papers CitationsCitations per paper
1United States53,300 1,092,808 20.50
2 England11,873 236,079 19.88
3 The Netherlands4,753 93,530 19.68
4 Switzerland3,152 61,485 19.51
5 Denmark2,184 42,518 19.47
6 Scotland3,103 57,433 18.51
7 Germany14,816 257,994 17.41
8 Belgium2,978 51,818 17.40
9 France11,568 200,919 17.37
10 Austria1,528 25,804 16.89
11 Norway933 15,499 16.61
12 Australia4,702 77,559 16.49
13 Wales664 10,838 16.32
14 Sweden3,044 49,632 16.30
15 Canada6,357 102,201 16.08
16 Ireland1,024 16,192 15.81
17 Finland1,496 22,937 15.33
18 Israel1,481 21,434 14.47
19 South Africa998 14,039 14.07
20 New Zealand867 11,613 13.39
The data above were extracted from the Essential Science Indicators database of Thomson Reuters. This database, currently covering the period January 1999 to June 2009, 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 the Thomson Reuters journal-to-category field-definition scheme. Both articles tabulated and citation counts to those articles are for the period indicated.

Here our ranking in microbiology is by citations per paper – among nations that collected 10,000 or more citations during the period – to reveal weighted impact. For articles with multiple authors from different nations, each nation receives full, not fractional, citation credit. Essential Science Indicators lists nations ranked in the top 50 per cent for a field over a given period, based on total citations. In microbiology, 88 nations are listed, meaning 176 were surveyed. Thirty-four nations collected at least 10,000 citations. For more information on Thomson Reuters Essential Science Indicators, see

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