Hi Brahim,

As examples, studies on antagonistic effect of lactic acid bacteria (LAB: Lactobacillus acidophilus, L. bulgaricus, L. casei and Streptococcus thermophilus), the effect of folate antagonists (TMP-SMZ), and activity of Lactococcus lactis subsp. Lactis on Staphylococcus aureus can be found through the three following links (articles):

http://www.ncbi.nlm.nih.gov/pubmed/8620186

http://cid.oxfordjournals.org/content/46/4/584.full.pdf

http://link.springer.com/article/10.1007/s13213-013-0641-x

Furthermore, you can find out through the links below three other articles (examples) investigating some antagonists of Pseudomonas aeruginosa:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2749241/pdf/nihms144849.pdf

http://aac.asm.org/content/50/11/3674.full.pdf

http://aem.asm.org/content/76/1/243.full.pdf

Cheers

In general, most of lactic acid bacteria and bifidobacteria, which are considered as beneficial gut flora, are having antagonistic activity against Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans.

You can find through the following links two papers that may satisfy your quer:y

http://www.ptfarm.pl/pub/File/Acta_Poloniae/2010/6/733.pdf

http://jac.oxfordjournals.org/content/40/3/319.full.pdf