Table 1. Distribution of Crimean-Congo hemorrhagic fever cases that were confirmed by serologic test, Mauritania, February–August 2003.

Laboratory testa	No. positive (%)b
ELISA-IgM	22 (64.7)
RT-PCR	1 (2.9)
Isolation	2 (5.9)
ELISA-IgM + RT-PCR	6 (17.6)
ELISA-IgM + RT-PCR + isolation	3 (8.8)
Total	34 (100.0)

^aELISA, enzyme-linked immunosorbent assay; RT-PCR, reverse transcription–polymerase chain reaction; Ig, immunoglobulin.
^bAn additional 4 persons met the criteria for having a probable case but died before sampling, so their cases could not be confirmed with serologic tests; according to the case definition, these persons were considered case-patients, which brings the total number of cases to 38.