Researchers studied two types of plant fungi that infect common vegetables and plants to determine if they could cause asthma in mice. They found that both organisms triggered immune responses similar to those caused by known allergens, producing inflammation and asthma-like symptoms. Although their effects were weaker than the reference allergen ovalbumin, both fungi showed significant potential as respiratory allergens. This research suggests these plant parasites should be recognized as possible triggers for asthma and allergic reactions in people.