As previously mentioned, anti dandruff shampoo is very effective against fungi. This is because most cases of dandruff are actually caused by fungi. I've found that if I let the lather sit on my skin for five minutes, it dramatically reduces recovery time. Simply washing with it seems to prevent new cases.
Also, there is a flea treatment for dogs and cats which I have found to be THE most effective treatment (orally ingested) method for ringworm. It's called lufenuron. The reason it's so effective, and safe, is because the chemical inhibits the formation of a material called chitin, which is essential to the cell walls of fungi, and to the exoskeletons of insects. Mammals do not produce chitin, and are unaffected by it. The chemical, being fat soluble, is stored in fat cells for roughly a month, slowly being shuttled along to fungi throughout the body.
For staph/mrsa, this may seem strange, but garlic oil (squeezed from garlic supplements) is a highly effective topical remedy. The active ingredient, allicin, has been shown to be a strong opponent to the infectious organisms and so far unadaptable (mrsa is a highly resistant form of staph, which is very hard to kill). When the oil is squeezed, the precursors to allicin begin a chemical reaction, from exposure to the air. All you need to do is rub the affected area, and the chemicals will get to work.
Everything I suggest has been tried and tested on myself, repeatedly (skin disorders are my weakness; nearly died from my first bout with mrsa and struggled with ringworm for roughly 8 months; I've been forced to find remedies that are effective).
I'm also a biology major, wrapping up my bachelor's before heading to grad school. I'm also in love with chemistry. So take this as you will.
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