Pregnant women should not clean litter boxes because of the risk of toxoplasmosis, a parasitic infection that can harm a developing fetus

Toxoplasmosis is caused by a parasite called Toxoplasma gondii, which lives in cat feces. When a pregnant woman inhales dust from an infected cat's litter box, she can contract the infection. In most healthy adults, toxoplasmosis causes no symptoms or mild flu-like illness. But in pregnancy, the parasite can cross the placenta and infect the fetus, potentially causing miscarriage, stillbirth, or serious birth defects including eye damage, brain damage, and intellectual disability.

The risk is real but not universal — not all cats carry the parasite, and not all exposures result in infection. However, because the consequences can be severe and the risk is preventable, medical organizations including the American College of Obstetricians and Gynecologists recommend that pregnant women avoid litter box cleaning entirely.

Key Takeaways

  • Toxoplasmosis is spread through cat feces and can cause miscarriage or serious birth defects if contracted during pregnancy.
  • A pregnant woman does not need to get rid of her cat, but she should not clean the litter box or handle soiled litter.
  • The parasite is also found in undercooked meat and unwashed vegetables, so food safety matters as much as avoiding the litter box.
  • If a pregnant woman has already been infected with toxoplasmosis before pregnancy, she has immunity and the fetus is protected.
  • Someone else in the household should clean the litter box daily, since the parasite takes several days to become infectious in feces.

How toxoplasmosis spreads from cats to humans

Cats become infected with toxoplasmosis by eating infected prey — mice, birds, and other small animals. Once infected, a cat sheds the parasite in its feces for one to three weeks, usually without showing any signs of illness. The parasite forms hardy structures called oocysts that can survive in the litter box for days or weeks.

When a pregnant woman cleans the box, she can inhale dust containing these oocysts or accidentally ingest them on her hands. The parasite then multiplies in her body and can cross into the placenta. The risk is highest during the first and second trimester, when the infection is most likely to cause severe fetal damage.

Not all cats carry the parasite. Cats that stay indoors and eat only commercial cat food are at very low risk. Cats that hunt outdoors or eat raw meat are at higher risk. But because you cannot tell by looking at a cat whether it is infected, the safest approach during pregnancy is to avoid the litter box altogether.

What a pregnant woman should do instead of cleaning the litter box

Ask a partner, family member, or friend to take over litter box cleaning for the duration of the pregnancy. The person cleaning should wear disposable gloves, wash their hands afterward, and clean the box daily — the parasite takes three to five days to become infectious, so daily removal of feces prevents buildup of infectious material.

If no one else is available to clean the box, a pregnant woman can do it while wearing disposable gloves and a mask, then wash her hands thoroughly with soap and warm water. This reduces but does not eliminate the risk. Afterward, she should avoid touching her face until her hands are clean.

A pregnant woman can continue to pet her cat, play with her cat, and be in the same room as the litter box — the risk comes from handling the feces themselves, not from the cat's fur or saliva.

Other sources of toxoplasmosis during pregnancy

Litter boxes are not the only source of infection. Toxoplasmosis is also spread through undercooked or raw meat, especially pork, lamb, and venison. A pregnant woman should cook all meat to a safe internal temperature — 160°F for ground meat, 145°F for whole cuts — and use a food thermometer to verify.

Unwashed vegetables and fruits can also carry the parasite if they have been in contact with contaminated soil. Washing produce under running water removes most of the risk. Avoid unpasteurized dairy products and unwashed hands when preparing food.

These precautions matter throughout pregnancy, not just during the weeks when a woman is avoiding the litter box.

Testing and immunity before pregnancy

Some women have already been infected with toxoplasmosis before becoming pregnant, usually without knowing it. If a woman was infected before pregnancy, her immune system has built up antibodies that protect the fetus from infection. A blood test can show whether a woman has immunity.

Some prenatal care providers order toxoplasmosis testing as part of routine screening, especially for women with cats or a history of eating undercooked meat. If the test shows immunity, the woman can relax the precautions — the fetus is protected. If the test shows no immunity, the precautions become even more important.

Testing is not routine in all parts of the United States, so a pregnant woman should ask her provider whether testing makes sense for her situation.

What happens if a pregnant woman is diagnosed with toxoplasmosis

If a pregnant woman contracts toxoplasmosis during pregnancy, her provider can prescribe antibiotics to reduce the risk of fetal infection. The most common medication is spiramycin, which concentrates in the placenta and reduces transmission to the fetus by about 60 percent. If fetal infection is confirmed through testing, other medications such as pyrimethamine and sulfadiazine may be used instead.

Early detection and treatment significantly improve outcomes. This is another reason to follow food safety and litter box precautions — they prevent infection in the first place, which is always safer than treating it after it occurs.

Frequently Asked Questions

Can I get toxoplasmosis from petting my cat?

No. Toxoplasmosis spreads through contact with feces or undercooked meat, not through a cat's fur, saliva, or skin. You can safely pet, hold, and play with your cat during pregnancy. The risk comes only from cleaning the litter box or handling soiled litter.

What if my cat is an indoor cat that has never hunted?

Indoor cats that eat only commercial cat food have a very low risk of carrying toxoplasmosis. However, because you cannot be certain of a cat's infection status without testing, medical organizations still recommend that pregnant women avoid litter box cleaning as a precaution. The risk is small but the potential harm is serious.

How long do I need to avoid the litter box?

You should avoid cleaning the litter box throughout your pregnancy and for a few weeks after delivery, while your immune system is still recovering. Once you are no longer pregnant or breastfeeding, the risk to you and your baby drops significantly, though basic food safety precautions remain sensible for everyone.

Can I wear a mask and gloves and clean the litter box myself?

Wearing gloves and a mask reduces the risk but does not eliminate it. If someone else can clean the box, that is the safest option. If you must clean it yourself, use disposable gloves, wear a mask, clean daily, and wash your hands thoroughly afterward. Ask your provider about your specific situation.

What if I was already exposed to the litter box before I knew I was pregnant?

A single exposure to a litter box does not may provide infection. Many exposures do not result in infection, especially if the cat is not actively shedding the parasite. Talk to your provider about your exposure and whether testing or monitoring is needed. In most cases, a single brief exposure carries low risk.