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Pregnancy Timeline by SemestersDevelopmental TimelineFertilizationFirst TrimesterSecond TrimesterThird TrimesterFirst Thin Layer of Skin AppearsEnd of Embryonic PeriodEnd of Embryonic PeriodFemale Reproductive SystemBeginning Cerebral HemispheresA Four Chambered HeartFirst Detectable Brain WavesThe Appearance of SomitesBasic Brain Structure in PlaceHeartbeat can be detectedHeartbeat can be detectedFinger and toe prints appearFinger and toe prints appearFetal sexual organs visibleBrown fat surrounds lymphatic systemBone marrow starts making blood cellsBone marrow starts making blood cellsInner Ear Bones HardenSensory brain waves begin to activateSensory brain waves begin to activateFetal liver is producing blood cellsBrain convolutions beginBrain convolutions beginImmune system beginningWhite fat begins to be madeHead may position into pelvisWhite fat begins to be madePeriod of rapid brain growthFull TermHead may position into pelvisImmune system beginningLungs begin to produce surfactant
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Saint Louis University to launch Zika vaccine trial

Saint Louis University's (SLU) vaccine center has been tapped by the National Institutes of Health to conduct a human clinical trial of a vaccine to prevent the Zika virus, which can cause devastating birth defects in babies.

The study, which will not start for several months, will be conducted at SLU's Center for Vaccine Development and at a research site partnering with SLU in Puerto Rico, a territory where local mosquitos are transmitting Zika virus infection.

"We are seeing widespread Zika in the Americas as well as Puerto Rico.

"As of June, 45 states have reported cases of Zika, contracted by people who have traveled to or have had sexual contact with someone who traveled to places where Zika is circulating locally. We need a vaccine to protect people from this emerging infectious disease that can cause microcephaly and other severe brain defects in babies."

Sarah George MD, Associate Professor of Infectious Diseases, SLU, a flavivirus expert and principal investigator of the study.

Zika is spread by Aedes mosquitoes, which also transmit dengue and chikungunya viruses. Zika also can be sexually transmitted.

About 80 percent of those who contract Zika have no symptoms. Those who feel sick typically have symptoms such as fever, headache, rash, joint pain, or red eyes that last four to seven days. A small number of those infected develop Guillain-Barre Syndrome, which can cause temporary paralysis.

The most significant health problems affect unborn babies, whose mothers contract Zika during pregnancy. The developing babies of infected mothers may develop serious complications including death and microcephaly (abnormally small brains) and vision problems.

George: "This could be similar to what we used to see with rubella (German measles). Frequently women got infected during pregnancy and didn't realize it because their symptoms were so mild. However about a third of their babies had very serious birth defects.

"We developed a vaccine, the MMR vaccine, that is given to children and has virtually eliminated rubella and its associated birth defects. Our hope is a Zika vaccine can accomplish the same goal. By immunizing people early, by the time they're of child-bearing age, they'd have immunity to this virus and it's possible their babies would be protected. However there are a lot of things we don't know about Zika and a lot we are still learning."

Saint Louis University is eligible to conduct the research because its VTEU is one of nine elite institutions selected in 2013 by the National Institutes of Health to study vaccines of the future that will protect people from infectious diseases and emerging threats. The project is funded under Contract No. HHSN272201300021I. The federal government has funded vaccine research at SLU since 1989.

Established in 1836, Saint Louis University School of Medicine has the distinction of awarding the first medical degree west of the Mississippi River. The school educates physicians and biomedical scientists, conducts medical research, and provides health care on a local, national and international level. Research at the school seeks new cures and treatments in five key areas: infectious disease, liver disease, cancer, heart/lung disease, and aging and brain disorders.

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Jun 27, 2016   Fetal Timeline   Maternal Timeline   News   News Archive   

Sarah George MD, is an infectious diseases expert studying viruses spread by mosquitoes.
Image Credit: Ellen Hutti/Saint Louis University.



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