Volume 22, Number 7—July 2016
Research
High Incidence of Chikungunya Virus and Frequency of Viremic Blood Donations during Epidemic, Puerto Rico, USA, 2014
Table 2
Month | No. samples | No. ID-NAAT reactive samples | ID-NAAT yield, % | No. reactive at 1:16 dilution (MP-NAAT) | IgM reactive |
IgG reactive |
||
---|---|---|---|---|---|---|---|---|
Total | IgM+/ID-only reactive | Total | IgG+/ID-only reactive | |||||
September | 987 | 18 | 1.8 | 8 | 11 | 7† | 8 | 7‡ |
October | 1,010 | 21 | 2.1 | 9 | 15 | 10 | 14 | 10 |
November | 1,010 | 17 | 1.7 | 4 | 16 | 12 | 14 | 12 |
Total | 3,007 | 56 | 1.9 | 21 | 42 | 32† | 36 | 32‡ |
*ID, individual donor; NAAT, nucleic acid amplification testing; MP, minipool.
†Includes 1 IgM-positive/IgG-negative ID-only positive specimen.
‡Includes one IgM-negative/IgG-positive ID-only positive specimen.
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