Reports of new cases of Zika infection in pregnant women held steady during the 2 weeks ending Feb. 21 as the number of new cases dropped in the territories and rose in the 50 states and D.C., according to the Centers for Disease Control and Prevention.
Compared with the previous 2-week period (Jan. 25-Feb.7), reports of new cases of pregnant women with laboratory evidence of Zika virus infection were up from 146 to 148, an increase from 61 to 79 in the states/D.C. and a decrease from 85 to 69 in the territories. The total number of Zika cases among pregnant women in the United States for 2016-2017 is 4,759, with 1,534 occurring in the states/D.C. and 3,225 in the territories, the CDC reported March 2.
Among all Americans, the number of Zika cases reported is now up to 43,380 since Jan. 1, 2015, with 38,306 occurring in the territories and 5,074 in the states and D.C. The state with the most cases is Florida at 1,107, followed by New York at 1,007 and California with 431. Puerto Rico has reported 37,515 cases so far, and the U.S. Virgin Islands have reported 989, the CDC said.
The figures for states, territories, and the District of Columbia are reported to the U.S. Zika Pregnancy Registry; data for Puerto Rico are reported to the U.S. Zika Active Pregnancy Surveillance System. These are not real-time data and reflect only pregnancy outcomes for women with any laboratory evidence of possible Zika virus infection, although it is not known if Zika virus was the cause of the poor outcomes.
Zika-related birth defects recorded by the CDC could include microcephaly, calcium deposits in the brain indicating possible brain damage, excess fluid in the brain cavities and surrounding the brain, absent or poorly formed brain structures, abnormal eye development, or other problems resulting from brain damage that affect nerves, muscles, and bones. The pregnancy losses encompass any miscarriage, stillbirth, or termination with evidence of birth defects.