Grey green mold on wheat bread. Take bread and tear it up, place in plastic bag and keep warm. Between 75-85 degrees. Mold will form rapidly.
Take moldy bread and place in a sterile jar with sterile water (kill two birds with one stone there by boiling the water in the jar and letting it cool sealed.
Let the jar with water and moldy bread sit for three days at about 85-95 degrees. You will have a thickbrown liquid. Filter this through a cheescloth or coffee filter and you will have a nasty bitter penicillin tea. Do not use unless you absolutely have to as any infections may well, perhaps WILL, build up a resistance to it quickly.
To Test you can take a scraping of an infected would and see bacterium with a lens from binoculars if you do not have a pocket microscope. When you have identified bacterium introduce some penicillin and see if it kills off the bacteria. Also may wish to test it on some healthy cells just to feel more secure by capturing a rodent/squirrel, etc and putting it on their wound and see it you did it wrong when they die a horrible screaming death (not really likely, but it drives the point of why you would want to test it first.
There are more complex methods involving use of Lactose Monohydrate, cornstarch, sodium nitrate, magnesium sulfate, potassium phosphate mono, glucose monohydrate, zinc sulfate, manganese sulfate. Then add enough cold tap water to make one liter. Use hydrochloric acid to adjust the pH to between 5.0 and 5.5. But if you are that well equipped you should have an SAS survival guide on hand anyway.
But hey people. There are other ways. In WW2 the Russians used Garlic as an oral and topical antibiotic to great effect. And I personally have used it to knock out an infected, impacted, wisdom tooth. And that some serious infection. Just eat it raw, tough it out and eat three whole cloves three times a day.
And you can also make a Topical paste with raw crushed garlic and honey (honey also has antibiotic properties.)
If you live in the Pacific Northwest there is a mushroom that often grows around conifers. Small White (when young) that exude a bright red sap. That red sap is an antibiotic and an anticoagulant.
And then there is Echinacea
Echinacea has been used for hundreds of years to strengthen the immune system and fight a variety of infections. Traditionally, echinacea was used to treat open wounds, diptheria, cellulitis, blood poisoning, syphilitic lesions and other bacterial-related diseases. Although it's mostly used today for fighting colds and flu, this potent herb possesses the ability to destroy the most virulent bacteria such as Staphylococcus aureus which causes deadly MRSA.
