Can H. pylori Spread in Families? Reinfection and Household Testing
If you have been diagnosed with H. pylori, it is natural to wonder whether your partner, children or parents have it too, and whether they could reinfect you after treatment.
How H. pylori spreads
H. pylori is usually acquired in childhood, often within the family. It is thought to spread through:
- Saliva, for example sharing utensils or pre-chewing food for children
- Vomit and faeces, especially where hygiene or sanitation is limited
- Contaminated water or food
Should family members be tested?
Practices vary between countries. Doctors may consider testing family members who:
- Have symptoms such as indigestion or stomach pain
- Have a family history of stomach cancer
- Live in a household where someone has had repeated infection
Testing everyone without symptoms is not routine everywhere, so ask your doctor what is recommended where you live.
How common is reinfection?
In adults, reinfection after successful treatment is relatively uncommon in countries with good sanitation and more common where infection rates are high. Often, what looks like reinfection is actually a treatment that never fully worked, which is why a confirmation test is essential.
Lowering the risk at home
- Wash hands with soap after using the toilet and before eating or preparing food
- Drink safe water, boiled or treated where needed
- Avoid sharing utensils, cups and toothbrushes during treatment
- Wash fruit and vegetables that will be eaten raw
- Do not pre-chew food for young children
Key takeaway
H. pylori often clusters in families, but good hygiene, safe water and proper treatment with a confirmation test greatly reduce the chance of it returning.
