Hi Lara I am also both Australian and asthmatic. I have various allergies and I think your question is valid.
Asthma is a inflammatory disease that affects the airways. However I have noticed that during the acute stages, mine is also triggered by intestinal distress. My husband also noticed that an attack was followed by a massive bowel elimination following a period of constipation. I get migraines too, which are triggered by foods and bright lights.
Asthma has been linked with food disorders and I had my first allergy test over 50 years ago. Now with the constant tinkering with the food chain we are seeing more cases than ever before.