MRSA in Pregnancy: Risks, Treatment & Prevention Canada

MRSA in pregnancy is a concern that many expectant mothers across Canada face, and understanding the facts can help you protect both yourself and your baby. MRSA, or methicillin-resistant Staphylococcus aureus, is a type of bacterial infection resistant to common antibiotics — but with timely medical care, it can be managed safely during pregnancy.

Understanding MRSA in Pregnancy: Risks and What to Expect

If you are worried about a staph infection during pregnancy, you are not alone. Many Canadian women carry staph bacteria on their skin without ever developing symptoms. However, knowing how MRSA spreads, what the warning signs look like, and which treatment options are safe for pregnant women can make all the difference. Always speak with your family doctor or healthcare provider before making any health decisions during pregnancy.

What Is Staphylococcus Aureus?

Treatment Options for MRSA in Pregnancy: A Canadian Clinical Overview

Treatment Option	How It Works	Benefits in Pregnancy	Key Considerations
Trimethoprim-Sulfamethoxazole (TMP-SMX)	Inhibits bacterial folate synthesis to stop MRSA growth	Effective oral option for mild-to-moderate skin and soft tissue infections	Avoid in first trimester and near term (36+ weeks); monitor for folate deficiency and neonatal jaundice risk
Clindamycin	Inhibits bacterial protein synthesis	Generally considered safe in pregnancy; effective for skin infections when susceptibility confirmed	Requires susceptibility testing to rule out inducible resistance (D-zone test); risk of C. difficile colitis
Vancomycin (IV)	Inhibits bacterial cell wall synthesis	First-line treatment for serious or invasive MRSA infections during pregnancy	Requires IV administration and hospital monitoring; dose adjustments needed as pregnancy progresses; monitor renal function
Incision and Drainage (I&D)	Surgical drainage of abscesses to remove infected material	Often curative alone for localized skin abscesses; reduces antibiotic exposure to fetus	Preferred first approach for uncomplicated abscesses; performed under local anaesthesia; safe at any gestational age
Decolonization Protocol	Topical mupirocin nasal ointment plus chlorhexidine skin washes	Reduces MRSA carriage and lowers risk of recurrent infection or transmission to newborn	Recommended for colonized pregnant patients prior to delivery; mupirocin considered low-risk in pregnancy

Staphylococcus aureus — often called a staph germ — is a type of bacteria that normally lives on your skin or inside your nose. About 25 to 30 percent of healthy people carry it in their nasal passages without ever getting sick.

In most cases, this bacteria causes no harm at all. However, if it enters your body through a cut, scrape, or skin wound, it can cause painful problems. These include fluid-filled blisters, boils with swelling and pus, and other skin infections.

In more serious cases, staph can travel deeper into the body. It can cause infections like pneumonia or slow the healing of surgical wounds. For this reason, it is important to take any skin infection seriously, especially during pregnancy.

How Does Staph Spread?

Staph spreads through direct skin-to-skin contact with an infected person. It can also spread through shared objects like towels or razors that have touched infected skin.

Certain groups of people face a higher risk of picking up a staph infection. These include:

• People who work in hospitals, walk-in clinics, or other healthcare settings
• People who have recently had surgery, dialysis, or a catheter placed
• People with a weakened immune system, including those living with HIV
• People living in crowded settings such as shelters

What Makes MRSA Different From Regular Staph?

Staph infections are usually treated with antibiotics such as penicillin, amoxicillin, oxacillin, or methicillin. These medicines work well in most cases. However, some strains of staph have changed over time and no longer respond to these common antibiotics.

This antibiotic-resistant strain is called MRSA — methicillin-resistant Staphylococcus aureus. About one percent of people carry this resistant strain in their nose without knowing it. While that number sounds small, MRSA infections can become very serious, and in rare cases, life-threatening.

It is important to understand that MRSA is not untreatable. It simply requires different antibiotics than the ones most commonly used. Health Canada monitors antibiotic resistance closely across the country to help guide safe treatment options.

MRSA in Pregnancy: What Are the Risks?

If you are pregnant and concerned about MRSA, here is some reassuring news. Current research has not linked MRSA infections to miscarriage or premature birth. Furthermore, having a staph infection does not increase your baby’s risk of being born with a birth defect.

It is worth noting that every pregnant woman carries a baseline risk of about three percent of having a baby with a birth defect. This risk exists regardless of whether a staph infection is present. MRSA does not appear to raise that number.

Are Antibiotics Safe During Pregnancy?

Many antibiotics used to treat staph infections are safe to use during pregnancy. Studies have shown that methicillin-type antibiotics do not cause birth defects or other problems for the developing baby.

If you have MRSA that does not respond to standard antibiotics, your doctor will carefully choose a different antibiotic. They will consider which medicine works best against your specific infection and whether it is safe for your baby. Therefore, it is very important to be honest with your doctor about any allergies, especially to penicillin.

Tell your doctor right away if you have ever had a reaction to penicillin or any antibiotic. This includes skin rashes, hives, or any other allergic response. Your doctor needs this information to choose the safest treatment for you and your baby. Learn more about MRSA symptoms and causes from the Mayo Clinic.

How to Prevent MRSA From Spreading

Prevention is your best defence against MRSA. The good news is that a few simple daily habits can greatly reduce your risk of infection or spreading it to others.

Hand Hygiene

Washing your hands is the single most effective way to prevent the spread of MRSA. Use soap and warm water and scrub for at least 20 seconds. If soap and water are not available, use an alcohol-based hand sanitiser.

Wound Care

Always clean cuts and scrapes right away with soap and water. Cover the wound with a clean, sterile bandage until a scab forms. Change bandages regularly and always wash your hands before and after doing so.

Avoid Sharing Personal Items

Never share razors, towels, washcloths, or clothing with anyone else. These items can carry MRSA germs even when they look clean. This rule applies to everyone in your household, not just those with an active infection.

Protecting Others

Avoid touching other people’s wounds, cuts, or scrapes. If you need to change a bandage for someone who has a skin infection, wear protective gloves. Always wash your hands thoroughly after any contact with an infected wound or dressing.

Treatment Options for MRSA

MRSA does not respond to standard antibiotics like methicillin or penicillin. However, other antibiotics do work against it. Your doctor will order a test called a culture and sensitivity test, sometimes called an antibiogram. This test identifies exactly which antibiotic will be most effective against your specific strain of MRSA.

In some cases, a skin infection caused by MRSA can be treated with drainage alone — no antibiotics needed. A doctor makes a small incision to drain the infected area. This must only be done by a qualified healthcare provider. Do not try to drain a boil or abscess on your own.

If antibiotics are prescribed, always follow your doctor’s instructions carefully. Take the full course of antibiotics, even if you start feeling better before it is finished. Stopping early can allow the bacteria to come back stronger. For more information, visit the WHO fact sheet on antimicrobial resistance.

MRSA and Breastfeeding

Many mothers worry about whether they can continue breastfeeding if they have MRSA. In most cases, the answer is yes — but with some important precautions.

Most babies whose mothers take penicillin or methicillin-type antibiotics while breastfeeding do not experience any problems. However, if you have MRSA and are breastfeeding, tell your doctor right away. They will choose the safest antibiotic for both you and your baby.

Signs Your Baby May Be Reacting to Your Antibiotic

Some babies can be sensitive to antibiotics that pass through breast milk. Watch for these signs in your baby while you are on antibiotic treatment:

• A skin rash or hives
• Unusual fussiness or discomfort
• Loose stools or diarrhoea more frequent than usual

If you notice any of these symptoms, contact your baby’s doctor right away. Do not stop your own antibiotic treatment without speaking to your doctor first.

Can My Baby Catch MRSA From Me?

Your baby cannot catch MRSA from your breast milk itself. However, MRSA can spread through direct contact with an infected wound. This means your baby could be exposed if they touch your infected skin, wound discharge, bandages, clothing, or bedding that has been in contact with the infected area.

To protect your baby, always wash your hands before handling them. Keep infected areas covered with clean bandages. Wash any clothing or bedding that has touched the infected area using hot water.

When to See a Doctor

If you are pregnant and notice any signs of a skin infection, do not wait. See your family doctor or visit a walk-in clinic as soon as possible. Early treatment helps prevent the infection from spreading or becoming more serious.

Signs that need prompt medical attention include:

• A red, swollen, or warm area of skin
• A wound that is not healing as expected
• Pus or discharge from a cut or scrape
• Fever or chills alongside a skin infection
• Painful boils or blisters that are growing larger

If you have already been diagnosed with MRSA and your symptoms are getting worse despite treatment, return to your doctor or go to a walk-in clinic right away. In some provinces, you may also be able to call your provincial health line for guidance — for example, 811 in most parts of Canada.

If you have a severe infection with high fever, difficulty breathing, or feel very unwell, go to your nearest emergency room immediately.

Frequently Asked Questions About MRSA in Pregnancy

Key Takeaways

• MRSA in pregnancy does not appear to cause miscarriage, premature birth, or birth defects based on current research.
• MRSA is a strain of staph bacteria that resists common antibiotics, but other effective antibiotics are available and many are safe during pregnancy.
• Your doctor will use a lab test to identify the right antibiotic for your specific infection.
• You can usually continue breastfeeding with MRSA, but always inform your doctor so they can choose the safest treatment.
• Simple habits — handwashing, wound care, and not sharing personal items — are your best defence against MRSA.
• If you notice signs of a skin infection during pregnancy, see your family doctor or visit a walk-in clinic as soon as possible.
• Always talk to your doctor or a qualified healthcare provider before starting, stopping, or changing any treatment during pregnancy.