Agree the main purpose is to get lactobacillus in there and you can achieve that with supplements if you have them.I'm confused. Why would you treat a yeast infection by utilizing a product that actually contains yeast?
A 1981 study published in Applied and Environmental Microbiology examined the yogurts for the presence of yeasts.
Yogurts purchased from retail outlets were examined for the presence of yeasts by being plated onto oxytetracycline malt extract agar. Of the 128 samples examined, 45% exhibited yeast counts above 103 cells per g.
In the study, a total of 73 yeast strains were isolated and identified as belonging to the genera Torulopsis, Kluyveromyces, Saccharomyces, Candida, Rhodotorula, Pichia, Debaryomyces, and Sporobolomyces. Torulopsis candida and Kluyveromyces fragilis were the most frequently isolated species.
Torulopsis candida is now called Candida glabrata. C. glabrata is often the second or third most common cause of candidiasis after C. albicans.
I know that the use of yogurts to treat yeast infections is considered a homeopathic treatment.
Based upon the logic of possibly feeding the infection more yeast, I would advise against it myself.
What you are trying to do with yogurt is to introduce Lactobaccillus bacteria to replace the yeast with nonpathogenic bacteria. This could more safely be accomplished by adding a probiotic to their water. Nearly all of them include lactobacillus as their primary bacteria.
Bacteria tax
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Studies in women with vaginal thrush however support yoghurt both as a solo treatment or together with an antifungal.
Not all yeast is bad - at least in people the gut microbiome contains yeast. The issue in sour crop is one variety of yeast has taken over and gone wild.
My thinking is to try and help recreate a mixed microbiome/mycobiome with a healthy mix of bacteria and yeasts.
Give that Candida albicans some competition!