Table I.

Maternal and fetal/infant ZIKV testing results among cases of microcephaly and/or CNS defects, Colombia, September 2015-April 2017 (n = 858)

Laboratory findings consistent with possible ZIKV infection in a maternal specimen*	Laboratory findings consistent with possible ZIKV infection in a fetal/infant specimen†	Reported cases, n (%)
Yes	Yes	52 (6.1)
Yes	No	17 (2.0)
Yes	Not tested	103 (12.0)
No	Yes	19 (2.2)
No	No	42 (4.9)
No	Not tested	31 (3.6)
Not tested	Yes	87 (10.1)
Not tested	No	141 (16.4)
Not tested	Not tested	366 (42.7)

^*Laboratory findings consistent with possible ZIKV infection in a maternal specimen include (1) ZIKV RNA detected by PCR from any maternal serum, maternal urine, placenta, umbilical cord, or umbilical cord blood; (2) ZIKV IgM detected by serologic testing of maternal serum; and (3) ZIKV antigen detected by immunohistochemistry of placenta.

^†Laboratory findings consistent with possible ZIKV infection in a fetal/infant specimen include (1) ZIKV RNA detected by PCR from any fetal/infant specimen including serum, urine, CSF, and fetal/infant tissues; (2) ZIKV IgM detected by serologic testing of infant serum or CSF, and (3) ZIKV antigen detected by immunohistochemistry testing of fetal/infant tissue; confirmatory plaque reduction neutralization testing was not conducted.