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?plantarum cells, but http://www.selleckchem.com/products/SP600125.html of behaviour in the human body, the results are valuable in selecting Lactobacillus spp. for probiotic applications, as resistance to low pH and high concentrations of bile salts is important for growth and survival of bacteria in the intestinal tract (Havenaar et?al. 1992; Carvalho et?al. 2009). Auto-aggregation showed to be strain-specific and may vary inside same taxonomic group. In another study conducted by Todorov et?al. (2008), strain specificity in auto-aggregation was also observed for Lact.?pentosus ST712BZ and Lact.?paracasei ST284BZ. Various degrees of co-aggregation with L.?monocytogenes 603, Lact.?sakei ATCC 15521 and Ent.?faecalis ATCC 19443 were observed in our study (Fig.?4). It is important to point that selected co-aggregation partners L.?monocytogenes 603 Lact.?sakei ATCC 15521 and Ent.?faecalis ATCC 19443 were http://www.selleck.cn/products/Imatinib(STI571).html sensitive or resistant to studied bacteriocins, respectively. The nine tested strains presented low levels of co-aggregation with L.?monocytogenes 603 and Ent.?faecalis ATCC 19443, but high levels of co-aggregation with Lact.?sakei ATCC 15521. The low levels of co-aggregation with pathogens may play an important role in preventing the formation of biofilms, and in this way eliminating the pathogens from the GIT. In contrast, higher co-aggregation levels with Lact.?sakei ATCC 15521, a nonpathogen, may facilitate the presence of this species in the human GIT. Adherence of tested strains to Caco-2 cells ranged from 7��8 to 13��9%, similar to that recorded for the reference strain, Lact.?rhamnosus GG (11��3%) (Fig.?5). Other studies had also evaluated the binding of LAB to colon carcinoma cells. Todorov et?al. (2007), working with bacteriocin producers isolated from boza and Todorov et?al. (2008), working with potential probiotics, observed that adherence of studied LAB to Caco-2 cells were in similar manner (0��26�C9��0%), in comparison with the 3��2�C14��4% adhesion values reported by Tuomola and Salminen (1998), the 0��08�C0��74% values reported by Bertazzoni-Minelli et?al. (2004) and the 7��8�C13��9% values observed in the present study. http://www.selleckchem.com/products/AZD6244.html Cell surface hydrophobicity is a nonspecific interaction between microbial cells and host. The initial interaction may be weak, often reversible and precedes subsequent adhesion processes mediated by more specific mechanisms involving cell surface proteins and lipoteichoic acids (Granato et?al. 1999; Rojas et?al. 2002; Ross and Jonsson 2002). Bacterial cells with a high hydrophobicity usually present strong interactions with mucosal cells. Todorov et?al. (2008) recorded hydrophobicity values of 75�C80% for strains Lact.?rhamnosus ST461BZ and ST462BZ and Lact.?plantarum ST664BZ and these values were higher than those recorded for Lact.?rhamnosus GG (55%).