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Finally! A Genetic Test for Sephardi and Mizrahis Too

DNA code analysis

For years, when we got inquiries from Sephardi or Mizrahi patients about preconception genetic testing, we would respond that there is currently no testing panel as there is for our Ashkenazi patients. And we would feel bad about that because we know that, like in many other ethnicities, there are genetic diseases which are common in Sephardi and Mizrahi populations too.

When we hosted a genetic testing event at Yeshiva University in 2013, our flyer included a call-out to the Sephardi students to contact us privately and not to register for the event. Turns out, 22 interested students were disqualified from the event, and I have no idea how many actually called us to come in for private counseling and testing. My guess is zero.

Since the genetics for Sephardi and Mizrahi Jews differ by country of origin (and there many countries with Jews), genetics labs never really made it a priority to develop testing panels. After all, why should they develop tests that a tiny number of people will actually need? So we were left between a rock and a hard place; on the one hand, we encourage people to get tested for diseases common to individuals of their ethnicity, but on the other hand, we are unable to order any testing. We were essentially pushing a product we didn’t have.

This all changed about a month ago, when we started offering a new panel that was developed for Jews of all backgrounds. This new panel is made of 96 diseases; 48 of them are common in Ashkenazis, 38 in Sephardi/Mizrahis, and 10 overlap between the groups (it is a very large panel!). Here are some of the things that we have been finding since we upgraded:

  • People think they know what their ancestry is, but are surprised to find out they may be more mixed than they thought. A patient of ours could have sworn he was 100% Ashkenazi, but he came back as carrier for a disease that is common in Yemenite Jews. When he asked his grandmother if there was something he didn’t know, he learned that he had some North African ancestors!
  • The more diseases we screen for, the more likely someone will be a carrier. We used to say that about 1 in 3 people will screen positive for something. But so far, I think we have only had one patient who was not a carrier of anything on the panel. And of course, being a carrier, in general has no effect on one’s health and should not be considered a stigma.
  • Even though we have tripled the amount of diseases on our testing panel, the ‘classic’ Jewish diseases are still ‘classic.’ I would have thought that the more diseases we screen for, we would see a wider array of results, but we have been seeing that those diseases that have been on the panel since the beginning (the common ones, like Tay Sachs and Gaucher) are still the ones that we have been picking up most often.
  • We have  had a Jewish history lesson for our genetic counselors helping them understand the different migrations of Jews over the course of history, and how ‘Ashkenazi’, ‘Sephardi’, and ‘Mizrahi’ Jews came to be.

The bottom line is that carrier screening is recommended before contemplating a pregnancy for anyone that is at least ¼ Jewish. It doesn’t make a difference if one has mixed ancestry, if he/she knows that a relative tested negative in the past, or if he/she chooses to affiliate with a movement within Judaism. Our genes do not choose to be transmitted only to the “more Jewish” people. Most of the diseases on the panel are a burden on the affected person and the family and testing a couple before a pregnancy is one of the best preventative actions one can take to avoid heartache. Visit to learn more about the testing.

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