Dog ownership linked to fewer respiratory infections in young children

Early exposure to dogs may reduce respiratory infections, antibiotic use, and fever episodes in young children, according to a study by Finland’s Institute for Health and Welfare (THL).

The protective effect appears tied to specific microbes associated with dogs, rather than the overall diversity of household bacteria. The benefit is strongest when a dog is introduced during pregnancy or early infancy, said paediatrician and visiting researcher Jenni Mäki.

The study, conducted by THL, Kuopio University Hospital, and the University of Eastern Finland, involved nearly 400 families across urban, rural, and farm settings. Researchers found that exposure to a diverse microbial environment in early childhood supports healthy immune development, similar to the effects observed in farm-raised children.

The dog’s protective impact persisted even after accounting for other factors influencing infection rates, such as family size, living environment, and exposure to smoking.

Mäki noted that the findings reinforce the importance of early-life microbial exposure in building a child’s immune resilience. She added that dog ownership may already be a practical way to shape a home’s microbiome in a health-promoting direction.