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Volume 8, Number 5—May 2002

Research

Sentinel Surveillance: A Reliable Way To Track Antibiotic Resistance in Communities?

Stephanie J. Schrag*, Elizabeth R. Zell*, Anne Schuchat*, and Cynthia G. Whitney*
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA

Main Article

Table 1

Ability of sentinel groups of three, four, and five laboratories to estimate accurately %PNSP, 1998a

Area Labs with >10 isolates (total labs) Actual %PNSP Total isolates Percent of sentinel groups within 5 percentage points of actual %PNSP
3 labs (no. of groups; overall range in %PNSP) 4 labs (no. of groups; overall range in %PNSP) 5 labs (no. of groups; overall range in %PNSP)
CA 5 (9) 15 181 100 (10; 12-17) 100 (5; 13-16) 100 (1; NA)
CT 25 (32) 18 681 73 (2,300; 2-31) 81 (12,650;4-30) 87 (53,130;6-30)
GA 18 (34) 33 860 45 (816; 19-51) 52 (3,060; 20-49) 58 (8,568; 21-48)
MD 20 (26) 22 579 60 (1,140; 8-40) 68 (4,845; 9-38) 74 (15,504; 10-37)
MN 12 (24) 20 470 78 (220; 11-30) 88 (495; 12-29) 94 (792; 14-28)
NY 5 (19) 15 191 80 (10; 9-15) 100 (5; 10-14) 100 (1; NA)
OR 6 (13) 21 228 80 (20; 14-25) 93 (15; 14-23) 100 (6; 17-21)
TN 20 (30) 35 419 37 (1,140; 11-62) 40 (4,845; 13-59) 44 (15,504;14-57)

aIn Active Bacterial Core surveillance areas.
%PNSP, percent of penicillin-nonsusceptible invasive pneumococcal isolates.

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