New research conducted at the University of Wisconsin-Madison and published in the journal mBio has found that Listeria monocytogenes food poisoning can be a serious miscarriage threat in early pregnancy. Scientists at the university's School of Veterinary Medicine studied how pathogens affect fetal development and change pregnancy outcomes. Dr. Ted Golos, a UW-Maidson reproductive physiologist and professor of comparative biosciences and obstetrics and gynecology said in a statement, "for many years, Listeria has been associated with adverse outcomes in pregnancy, but particularly at the end of pregnancy. What wasn’t known with much clarity before this study is that it appears it’s a severe risk factor in early pregnancy. It's striking that mom doesn't get particularly ill from … [Read more...]
Why are Pregnant Women So at Risk for Listeria Infections?
Why are pregnant women so at risk for Listeria monocytogenes infections? This population group can suffer miscarriage, stillbirth, and premature labor if this infection is contracted. And the babies can be born with listeriosis, which is life-threatening. One theory is that in pregnancy, the immune system is suppressed so the body doesn't reject the embryo and fetus. This reduction in immunity may be why these women are so susceptible to listeriosis and why the complications can be so severe. Researchers at Berkeley, however, discovered that Listeria monocytogenes bacteria use the immune system suppression to invade the placenta where they are protected from the mother's immune system. Once the bacteria are in the placenta, they can grow rapidly, then emerge to infect the … [Read more...]
How do Babies Contract Listeriosis?
In some Listeria monocytogenes food poisoning outbreaks, we tell you that infants contracted this infection. In the current listeriosis outbreak linked to recalled Vulto Creamery raw milk cheese, one of the illnesses was reported in a newborn baby. Since babies do not consume raw cow's milk or eat raw cheeses or unpasteurized juices, the most common vectors for this pathogenic bacteria, how do they get sick? Short answer: their mother was sick. When a woman eats food contaminated with this pathogenic bacteria, she can pass the infection to the fetus. And if the fetus survives, since listeriosis can cause miscarriage and stillbirth, they can be born with this infection. In the Bidart Brothers' caramel apple Listeria monocytogenes outbreak, 35 illnesses occurred in pregnant women. … [Read more...]
Holiday Food Safety for Pregnant Women
FoodSafety.gov is offering food safety tips for pregnant women this holiday season. Pregnant women must always be diligent about food safety, and especially so when attending parties and family gatherings. These women are at higher risk for food poisoning complications, especially listeriosis, the illness caused by Listeria monocytogenes bacteria. A woman's immune system is weaker when she is pregnant, which makes her at greater risk of contracting a foodborne illness. Toxoplasma gondii and Listeria monocytogenes are two of the major pathogens to be concerned about. Listeria bacteria can cause miscarriage, premature delivery, stillbirth, infection in the newborn, or the death of a newborn. And toxoplasma gondii can cause hearing loss, blindness, and intellectual disabilities in … [Read more...]
EWG Warns of Mercury in Seafood
Environmental Working Group (EWG) has produced a new study called "U.S. Fish Advice May Expose Babies to too Much Mercury." In it, they say that "adhering to the federal government's recommendations on seafood and mercury may be risky, potentially leading women to eat too much of the wrong kind of fish." The guidelines were issued as a draft recommendation in 2014 that recommended that women who are pregnant or breastfeeding eat more fish that is lower in mercury. Their tests found that mothers who eat species of fish in the amounts recommended by the EPA and FDA may risk exposing their fetuses to harmful levels of mercury. And those species do not have enough omega-3 fatty acids that are recommended in the diet. Mercury has toxic effects on the nervous, digestive and immune systems, … [Read more...]
What Scientists Say about Listeria and Pregnancy
Bidart Bros. Listeria caramel apple outbreak was a grim reminder about the special threat listeriosis poses to expecting mothers and their babies. As analyzed by the Centers for Disease Control and Prevention (CDC), eleven of the 35 illnesses attributed to the outbreak were pregnancy-related, with one case resulting in a fetal loss. One of the expecting mothers passed the Listeria bacteria to her fetus and the baby was born with an infection that required a month of treatment in the neo-natal intensive care unit of Lovelace Hospital in Albuquerque, New Mexico. Dr. Vanitha Janakiraman, writing in Obstetrics and Gynecology, provided in-depth information about the relationship between Listeria food poisoning and pregnancy. Infection from the pathogen is rare, but 20 more times common in … [Read more...]
Paris Researchers Find Placental Breach Mechanism for Listeria
As the deadly Listeria monocytogenes outbreaks linked to recalled caramel apples made from Bidart brothers apples, and to Queseria Bendita cheese point out, pregnant women are very susceptible to these bacterial infections. In the caramel apple outbreak, ten pregnant women were sickened; one woman suffered a fetal loss. In the Queseria Bendita cheese outbreak, one infection was associated with a pregnancy. Scientists believe that the bacteria get into the placenta and hide from the mother's immune system, letting them multiple to dangerous levels. But the placental barrier usually acts as a barrier to bacteria. What makes Listeria different? Researchers at the Pasteur Institute in Paris have found that Listeria survives and grows within the intestinal lumen (channels in the … [Read more...]
Two Mechanisms for Fetal Infection with Listeria Bacteria
Pregnant women are at high risk for Listeria monocytogenes infections. Almost thirty percent of patients sickened in the current Listeria outbreak linked to caramel apples and plain apples packed by Bidart Brothers are pregnant women. One woman suffered a fetal loss. How are babies infected with this pathogenic bacteria when the mother eats contaminated food? There are two mechanisms for fetal infection, called early onset and late onset. Early onset occurs when a transplancental infection occurs: the bacteria has progressed to the placenta, where it is shielded from the mother's immune system and grows rapidly. A Listeria infection in pregnant women usually only produces mild symptoms including fever, headache, chills, back pain, and diarrhea. Those symptoms mimic the flu, which can … [Read more...]
Bidart Brothers and the Caramel Apple Listeria Investigation
Food safety investigators in the United States are still probing to decipher what caused the deadly outbreak of Listeria poisoning associated with commercially made caramel apples, including whether there are common sources of caramel, caramel ingredients, sticks, or packaging to the various makers of these caramel apples. So far, the biggest common denominator between companies involved in the recall of potentially contaminated caramel apples is Bidart Brothers, the fruit supplier. Based on documents released so far by the Food and Drug Administration (FDA) and Centers for Disease Control and Prevention (CDC), California-based Bidart Bros. was first briefed about its possible involvement in the outbreak by FDA officials on December 22. On that same day, the company issued a recall of … [Read more...]
