Earlier on Friday, U.S. health officials published a study estimating that as many as 270 babies in Puerto Rico may be born with the severe birth defect known
as microcephaly caused by Zika infections in their mothers during pregnancy.
Not exact matches
The WHO says there is strong scientific consensus that Zika is a
cause of the birth defect
microcephaly, or small heads in babies,
as well
as Guillain - Barre syndrome, a neurological disorder.
Furthermore, the defects observed are specific to an infection by ZIKV,
as other neurotropical viruses of the flavivirus family (West Nile virus, yellow fever,...) did not
cause microcephaly, in contrast to Zika virus.
But the virus has also been linked to an autoimmune disease that can
cause paralysis called Guillain — Barré syndrome
as well
as an alarming surge in a birth defect called
microcephaly in Brazil.
MICROCEPHALY MUTATION Scientists may finally understand why the Zika virus was suddenly able to
cause microcephaly,
as seen in this child in Salvador, Brazil.
With its rapid spread throughout Central and South America, Zika has emerged
as a severe health threat that can
cause microcephaly in newborns,
as well
as Guillain - Barre syndrome in children and adults.
The famous cancer gene BRCA1 may also play a role in neurodevelopmental disorders such
as microcephaly (right), which
causes small brain size.
Roughly four in every 1000 babies are infected with cytomegalovirus (CMV), which can
cause seizures and intellectual disability,
as well
as Zika - like symptoms including
microcephaly.
Satuation of the environment with pesticides, including the drinking water, in this particular area of northeastern Brazil needs to be studied
as a
cause of
microcephaly as well:
This condition, which can be
caused by a number of infections, is known
as microcephaly (My - kro - SEFF - uh - lee).
It generally presents
as a mild flu, but can
cause severe birth defects, including
microcephaly, if a woman becomes ill while pregnant.
Although the evidence for Zika
as the
cause of
microcephaly is growing, absolute proof is still not available.
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 Zika virus is generally mild, but can
cause severe birth defects such
as microcephaly if a woman contracts the disease while pregnant.