I had to use a nebulizer with a sick anthill python. While your link did not work for me, I would guess from my snakes recovery and the fact that I've discussed nebulization with a couple of vets, that the article may be mistaken.
In our case, an antibiotic was prescribed which was then diluted in sterile saline and administered via a nebilizer that the Vet loaned out to me.
I guess the idea is that the nebulizer reduces the antibiotic into microscopic particles that can be inhaled directly into the lungs so that the medication is delivered to the site of infection.
Nebulizers aren't cheap, so perhaps your Vet can either loan one to you, rent it to you or even perform the therapy in the office.
I have seen forum postings where people have advised using humidifiers in lieu of nebulizers. Unfortunately, these do not reduce the particles small enough for them to be effective. This is one of the reasons that many people don't think nebulizing works - they aren't really using a nebulizer. They are using a humidifier which, in some cases, can make the situation worse.
Anyway, I had rescued a yearling anthill python with pneumonia that was given little to no chance of survival. Anthills are delicate to begin with. Our Vet loaned us the nebulizer and we administered antibiotics for 10 days with it. The snake pulled through and is still alive today.