Table III.

Likely etiology among cases of microcephaly and/or CNS defects, Colombia, September 2015-April 2017 (n = 858)

Etiologic classifications	N (%)
Teratogenic—infectious	535 (62.4)
ZIKV (n = 503)
Strong evidence of congenital ZIKV (n = 124)
ZIKV only (n = 117)
ZIKV-STORCH coinfection (n = 7)
Cytomegalovirus (n = 2)
Toxoplasmosis (n = 5)
Moderate evidence of congenital ZIKV (n = 232)
ZIKV only (n = 224)
ZIKV-STORCH coinfection (n = 8)
Cytomegalovirus (n = 3)
Toxoplasmosis (n = 4)
Syphilis (n = 1)
Limited evidence of congenital ZIKV (n = 147)
ZIKV only (n = 141)
ZIKV-STORCH coinfection (n = 6)
Cytomegalovirus (n = 3)
Toxoplasmosis (n = 2)
Multiple STORCH (n = 1)
STORCH (n = 32)
Cytomegalovirus (n = 17)
Toxoplasmosis (n = 10)
Herpes simplex virus 1 or 2 (n = 2)
STORCH-STORCH coinfection (n = 3)
Genetic	16 (1.9)
Multifactorial—neural tube defects	42 (4.9)
Unknown etiology	265 (30.9)
Holoprosencephaly (n = 10)
Multiple congenital anomalies (n = 38)
Other unknown etiology (n = 217)