Cats, cockroaches. While any allergies can be associated with and trigger asthma symptoms, there are 2 in particular which have been shown in the medical literature to be highly linked to asthma flares. Cats allergies are by far the most associated with asthma, followed by cockroach allergies (most common in inner-cities). Chlorine has also been associated with asthma, but it is not considered an allergy.
Any. Although common inhalant allergens (dust mites, cockroach, mouse, rat, cat, dog, mold, pollens) are most often the allergic triggers for asthma, in some cases food allergy can be the trigger of asthma episodes.
Aeroallergens. Asthma is associate with allergy in 80% of children and 50% of adults. The allergens that are associated with asthma are primarily those that we can breathe or the aero allergens. This includes thing such as pollen, mold spores, animal dander, cockroach, and dust mite.
Inhaled allergens. Inhaled allergens are more likely to trigger asthma than food allergens. Animal danders, especially cat dander, are significant triggers as are house dust mites & cockroach. Mite particles enzymes may break down the epithelial barrier in the breathing tubes leading to additional allergic sensitization. The mold spore alternaria is thought to be the cause of thunderstorm-triggered asthma.