I've been meaning to post this info to WTM and kept forgetting. Well I just posted it in another thread, so then I thought I should post it in the garlic thread too. And I was surprised to see that we didn't have a thread dedicated to general information, research, and questions on garlic. It's like the go-to herb for so many things. It needs it's own thread, IMHO. (Although it's HB's opinion that counts -- so we'll see.)

Here's the info I have...
GARLIC!
I did some research on garlic not long ago and found studies done on really bad lung infections that showed garlic interferes with quorum sensing (the ability of bacteria to communicate with each other). Quorum sensing is what enables bacteria get together to form biofilms (a really tough colony that makes them more resistant to antibiotics and your immune system). I'm not sure that all kinds of bacteria form biofilms, but I would suspect biofilms in any situation were they had become antibiotic resistant.
What's great about the research I read, was that not only does garlic interfere with the formation biofilms, making them more susceptible to antibiotics, but it also makes them more susceptible to PMN grazing.
PMN's are polymorphonuclear leukocytes, a category of white blood cells, the most common kind being Neutrophil granulocytes. Once a PMN comes in cantact with a bacteria or candida and recognizes it as being a "bad guy", it envelops it and delivers a respiratory burst --that is, it releases a superoxide radical and hydrogen peroxide to kill the yeast or bacteria (google Neutrophil and Oxidative burst and you can see video of it - it's fascinating!).
And when garlic is introduced, the "bad guys" seem to attract more PMNs. This causes an initial increase in inflammation at the infection site as the PMNs rush in to graze on the bacteria or yeast. And there is an increase in respiratory burst activation, too. This means that more of the PMNs are killing, rather than being killed by, the bacteria.
The studies I saw were done with freshly made garlic juice administered orally.
Yay garlic!
WR