Just a note to start....there must be a typo in your posting about her weight - it can't be 0.6g !
I have to say that your efforts and commitment have been outstanding in all of this. Truly commendable !
this was properly/accurately diagnosed at the outset
, it isn't a staph infection. That's not to say a secondary infection isn't impossible....however, my opinion
is that it's more likely an issue of the fungus not having been adequately treated and therefore spreading.
Diagnosis isn't simple. Here a reliable reference about accurately diagnosing ringworm:
Diagnosis of ringworm in pets
If you suspect your pet has ringworm, it’s important to go straight to your vet, as diagnosis often requires a thorough clinical examination and testing. Your vet will use a combination of the following diagnostic tests:
- Observation. Your vet will first examine your pet for any of the skin lesions and scaling that typically occur with ringworm.
- Wood’s Lamp. This special ultraviolet lamp is designed to show up a yellow-green fluorescence. The fluorescent material is not actually the fungi themselves, but an excretion that sticks to the hair shaft. While this quick and non-invasive test will help diagnose some cases, it only picks up a percentage of Microsporum canis infections so a negative result does not rule out a ringworm infection.
- Microscope. Your vet may gently pluck a small sample of hair surrounding the lesion and view the hair shafts under the microscope. This may allow the visualisation of fungal spores attached to the hair shafts.
- Fungal culture. If your vet needs to confirm the diagnosis, they may send a hair sample to a lab for testing. While it can take up to four weeks for a conclusive diagnosis from the lab, early signs of the infection can be detected within a few days. A fungal culture can be necessary if results of other tests are inconclusive or if the particular species of ringworm needs to be identified.
Your vet may also perform additional testing to rule out other causes of the hair loss and skin lesions (eg. allergic skin disease, sarcoptes or demodex mites).
A well-known feline Veterinarian provides a comprehensive coverage of ringworm infection, diagnosis and treatment here: Ringworm for Cats | Manhattan Cat Specialists | Articles
These days, all of us, I think, are finding it increasingly difficult to read and absorb
lengthy, detailed scripts...like that article. We tend to skim through as quickly as possible....that's not going to work in this case, IMO....the section on treatment there is chock-full of nitty-gritty info. The better you can absorb all that, the better will be the chance of success, I think.
A point of note in there:
Local topical therapy with ointments and creams is generally not recommended for treatment....
I can't tell from your post just how the diagnosis was made and whether/not there's been veterinary prescribing and monitoring throughout the past three months. I hope the references I offered will help. Meticulous attention to detail in every aspect makes for success in eradicating ringworm.