Blastomycosis?

We had just received a confirmed diagnosis of blastomycosis that our beloved elder dog. We are saddened to say he is not able to receive treatment and the diagnosis is fatal. With that on our hearts and beginning to research this fungus...We are concerned because our dog has not been anywhere but our backyard. We have lived in this house and had our furry family member for over 10 years. How can this just now be happening? To further our concerns: My female Boston terrier, which stays inside, has a small fungus occurring in her ear and we will have that also tested asap. Since this apparently is in our backyard, is it likely for us (humans) to get this fungus? How can we determine the location? What are the beginning symptoms? Can anyone share any pertinent information (please)? Please feel free to email me at tannlawson@yahoo.com. I am alerted to the fact of a recent nodule in my husband’s lungs…can this be tested for blastomycosis?—Singed, lots to think about and prayers requested.