Toxoplasmosis in pregnancy
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What will happen to me and my baby?
If you're diagnosed with toxoplasmosis while you are pregnant, you'll usually be offered drug treatment to help protect your baby.

If your blood tests show that you've had a recent infection, your doctor will probably offer you a prescription medication called spiramycin. This comes as pills or capsules.

Toxoplasmosis isn't harmful to you. The aim of the medication is to reduce the chance of passing the infection to your unborn baby.1

Spiramycin isn't available routinely in the United States. But your doctor can make a special request for it.

You'll need to discuss the pros and cons of this treatment with your doctor. Spiramycin hasn't been found to cause birth defects, but there's no guarantee that it's completely safe for your baby.2 It passes into the breast milk, although it hasn't been shown to cause problems in nursing babies.

Treatment for a baby with toxoplasmosis
If your doctor thinks that your baby already has toxoplasmosis, there are treatments you can take that pass to your baby. It will probably be a combination of medications that travel to the baby in your blood.

Newborn babies and toxoplasmosis
If you had toxoplasmosis just before or during your pregnancy, your baby will be checked carefully shortly after birth. Your baby's doctor will do blood tests to see if he or she is infected. Your baby will also need further tests and examinations during the first months of life.

You can still breastfeed if you have toxoplasmosis. Doctors think it's unlikely that the infection would spread to your baby from breastfeeding.3 The parasite that causes the infection has never been found in human breast milk.

About 1 in 10 newborn babies who get toxoplasmosis while in the womb (congenital toxoplasmosis) have a severe infection that is obvious at the time of birth. These babies often have:4

Sadly, some babies die within a few days of birth.4

Up to 9 in 10 infected babies seem normal at birth. But about 8 in 10 of these babies will have health problems months or even years later. The problems include:5

  • Eye infections and blindness
  • Hearing loss
  • Learning disabilities
  • Epilepsy.
A serious eye infection called retinochoroiditis is the commonest health problem caused by congenital toxoplasmosis. This can permanently damage your baby's eyesight.

If your baby has eye problems, he or she will need to be supervised by an eye specialist, called an ophthalmologist. This is because new eye infections and sight problems can continue to happen through childhood, into the 20s and even later.5

Some research has shown that babies who are treated with drugs in their first year are less likely to suffer permanent damage from toxoplasmosis than those not treated at all or those treated for shorter periods.6



Sources for the information on this page:
  1. Montoya JG, Liesenfeld O. Toxoplasmosis. Lancet. 2004; 363: 1965-1976. 15194258
  2. National Toxicology Program: Center for the Evaluation of Risks to Human Reproduction. Toxoplasmosis. September 2006. Available at http://cerhr.niehs.nih.gov (accessed on 3 April 2008).
  3. Centers for Disease Control and Prevention. Breastfeeding: infectious diseases and specific conditions affecting human milk: toxoplasmosis. April 2005. Available at http://www.cdc.gov (accessed on 3 April 2008).
  4. National Toxicology Program: Center for the Evaluation of Risks to Human Reproduction. Toxoplasmosis. September 2006. Available at http://cerhr.niehs.nih.gov (accessed on 3 April 2008).
  5. Jones J, Lopez A, Wilson M. Congenital toxoplasmosis. American Family Physician. 2003; 67: 2131-2138. 12776962
  6. McCleod R, Boyer K, Karrison T, et al. Outcome of treatment for congenital toxoplasmosis, 1981-2004: the National Collaborative Chicago-based congenital toxoplasmosis study. Clinical Infectious Diseases. 2006; 42: 1383-1394.
This information was last updated in Apr 21, 2008