Table 1.

Qualitative recoveries of pneumococci (Pnc) from the STGG-Stored samples, DP samples, and STGG-Fresh samples

Storage conditionPncaNo. of specimens with the indicated result found by:
DPSTGG-FreshSTGG-Stored
Pnc +Pnc −Pnc +Pnc −
−70°C, 6 wk+38371380
16016bNDND
−20°C, 8 wk+18171180
25223b2ND
4°C, 5 days+20182182
15015015
  • a + and −, positive and negative for pneumococci, respectively.

  • b Specimens found negative from both DP and STGG-Fresh samples were presumed negative from STGG-Stored samples and therefore were not tested.