Hello, while I do not know what Australia would say, I did not know you even had to declare any illness's, Your wife's blood work looks good to me.
Good luck
We don't know what the criteria are for "health burden", so we cannot give you an opinion. People with Hepatitis B have been allowed to migrate to Australia, each case is considered on its own merit. In general, I would say the Australian system is fair.
Good luck.