We investigated the effects of a well characterized probiotic strain, Lactobacillus rhamnosus Lcr35, on human monocyte-derived immature DCs, using a wide range of bacterial concentrations (multiplicity of infection, MOI, from 0.01 to 100).
This persistence may be related to the severity of clinical presentation, the bacterial load (multiplicity of species and strains and their density of infection), the frequency of exposure to multiple pathogenic strains, or poor compliance with antibiotics.
For this purpose, log phase growth of M. tuberculosis H37Rv in Middlebrook 7H9 broth with 10% OADC was washed twice with HBSS and adjusted in DMEM with 1% FBS to reach a bacterial macrophage multiplicity of infection of 10 1.
Presumably, at the bacterial surface, the multiplicity of the LukS-PV signal peptide should strongly contribute to avidity, resulting in tighter interactions.
J774 and THP1 macrophage monolayers were incubated for 90 min and BMM for 60 min at 37°C with the bacterial suspensions (approximate multiplicities of infection 100) to allow the bacteria to enter.
J774 macrophage monolayers were incubated for 90 min at 37°C with the bacterial suspensions (approximate multiplicities of infection 100) to allow the bacteria to enter.
Briefly, MAC-T cell monolayers were infected with bacterial cultures at a multiplicity of infection (MOI) of 500∶1.
Such a multiplicity of bacterial virulence factors encoded within a single genome can frustrate attempts to dissect virulence via conventional mutagenesis.
Bacterial infection, with a multiplicity of infection of 20 bacteria per epithelial cells, was performed at 37°C on polarized, starved T84 epithelial cells.
Epithelial cells were washed thrice with PBS/Mg2+Ca2+ and finally covered for 1 h at 37°C with 500 μl RPMI 1640 containing bacterial cells to a multiplicity of infection of 10.
