Do Cockroaches and Mice at Home Cause Severe Colds in Kids?

A new study published in The Journal of Allergy and Clinical Immunology explored the connection between indoor allergens and upper respiratory infections (URI) and related symptoms.

Researchers utilized data from a previous childhood asthma study to assess allergen concentration in the air and dust of participants' homes. Allergens tested included those from mice, cockroaches, dogs, and cats. Upper respiratory infections were diagnosed using nasal lining tests for viruses.

Key findings indicated that exposure to cockroach and mouse allergens significantly intensified cold symptoms in children with asthma. Doubling cockroach allergen concentration increased the likelihood of cold symptoms by 18%, cold and pneumonia symptoms by 31%, and cold symptoms with reduced lung function by 45%. Notably, these were children with an asthmatic background.

Mouse allergen concentrations were also positively linked to all outcomes reviewed. Importantly, these connections were stronger among children already sensitive to pest allergens.

The study's results suggest that exposure to cockroach and mouse allergens can worsen the condition of children with asthma suffering from upper respiratory infections and associated respiratory symptoms. Researchers concluded it's crucial to maintain household cleanliness and reduce exposure to such allergens, especially for asthmatic children. Keeping proper hygiene may help prevent the exacerbation of cold symptoms and other respiratory illnesses.