He said researchers have undertaken studies to answer some of those questions in Brazil, where
the number of microcephaly cases is highest.
She said before the outbreak of the virus, the average
number of microcephaly every year was just 163 cases.
Not exact matches
The agency said there have been recent variations in the
number of cases reported in the region and, while the level
of risk is unknown, Zika virus infection during pregnancy causes severe birth defects, including
microcephaly and other severe brain abnormalities.
The
number of babies born with
microcephaly in northeast Brazil, the country hardest hit by the Zika outbreak, has increased about 40-fold from baseline levels in the last six months, according to reports from Brazil's Ministry
of Health.
Brazil said on Friday the
number of confirmed and suspected cases
of microcephaly in Brazil associated with the Zika virus has risen to 5,131 from 4,976 a week earlier.
A far higher
number of babies in Colombia have developed
microcephaly related to Zika virus infections than previously reported.
Wong: I can't put percentages on that yet, but I would say that although there are still plenty
of people who believe that the original interpretation is correct, there are an increasing
number of people who at least think that the hypothesis
of pathology, like this
microcephaly, has not yet been sufficiently ruled out.
There has been a 20-fold increase in the
number of babies born with this condition, known as
microcephaly, since Zika first appeared in Brazil in May 2015.
Even as the Zika virus becomes more prevalent — the Centers for Disease Control reports that the
number of U.S. infants born with
microcephaly and other birth defects is 20 times over the normal rate — researchers are still trying to fully pin down the identifying consequences
of the viral infection.
«The increased
number of newborns with
microcephaly observed during the Zika outbreak in Brazil is linked to Zika infection
of the mother during early pregnancy,» explains Drexler.
A particular cause for concern was the increasing
number of cases
of brain malformations in newborns (
microcephaly).
The
number of these structures is highly monitored, with deviations causing infertility,
microcephaly and accelerating cancer.
We next estimated the maximum
number of births potentially affected by ZIKV in Latin America, as this region is the focus
of the recent outbreak and the first to point to a possible association with
microcephaly in newborn infants to mothers infected with ZIKV.
This condition, which can be caused by a
number of infections, is known as
microcephaly (My - kro - SEFF - uh - lee).
The
number of babies born with
microcephaly in 2016 there was four times what it was in 2015.
Recife is experiencing an outbreak
of ZIKV infection as well as an increase in the
number of newborns with
microcephaly.
Contracted through the bite
of an infected mosquito or through sexual or other modes
of transmission, Zika virus (ZIKV) infection can be prenatally passed from mother to fetus.1 The virus was first identified in the region
of the Americas in early 2015, when local transmission was reported in Brazil.2 Six months later, a notable increase in the
number of infants with congenital
microcephaly was observed in northeast Brazil.3, 4 Clinical, epidemiologic, and laboratory evidence led investigators to conclude that intrauterine ZIKV infection was a cause
of microcephaly and serious brain anomalies.5 - 7 However, as with other newly recognized teratogens, these features likely represent a portion
of a broader spectrum.
The state has the second highest
number of Zika infections in the country, behind New York, including at least 53 pregnant women, who are considered to be at greatest risk from the virus because it can cause
microcephaly and other birth defects.
But Brazil has also been criticized for its lack
of transparency, and for not sharing significant samples and data to determine whether the virus is responsible for the increase in the
number of babies born with
microcephaly, a rare neurological condition.