Henle 407 and HeLa cells were compared as hosts for Shigella dysenteriae at a low multiplicity of infection. Efficiency of attachment and invasion without centrifugation, as well as selectivity for pathogenic over nonpathogenic S. dysenteriae without Congo red, were much greater for Henle 407 cells than for HeLa cells.

using the fixed point theorem in a‎ ‎cone‎, ‎the existence and multiplicity of radial convex solutions of‎ ‎singular system of monge-amp`{e}re equations are established‎.‎

using the fixed point theorem in a‎ ‎cone‎, ‎the existence and multiplicity of radial convex solutions of‎ ‎singular system of monge-amp`{e}re equations are established‎.‎

BACKGROUND In cell culture-based influenza vaccine production the monitoring of virus titres and cell physiology during infection is of great importance for process characterisation and optimisation. While conventional virus quantification methods give only virus titres in the culture broth, data obtained by fluorescence labelling of intracellular virus proteins provide additional information o...

The objectives of this work are to: 1) define the typical time scale for the shift in inherent optical properties (a, b, c, and bb) associated with viral infection of marine bacteria (as compared to non infected control populations), 2) define the maximum possible rates of shift in inherent optical properties (a, b, c, and bb) under conditions of high virus multiplicity of infection, and 3) def...

The conditions for synchronous transformation of chick embryo cells by infection with Rous sarcoma virus are studied. Two factors, the treatment of cells with DEAE-dextran and the use of cells which grow rapidly following virus infection, are found to be most important. Under the conditions described, the Schmidt-Ruppin strain of Rous sarcoma virus at a multiplicity of higher than 5 induces mor...

BACKGROUND There have been few investigations evaluating the burden of malaria disease at district level in the Republic of Congo since the introduction of artemisinin-based combination therapies (ACTs). The main objective of this study was to document laboratory-confirmed cases of malaria using microscopy and/or rapid diagnostic tests (RDTs) in children and pregnant women attending selected he...

Malaria is a major health problem, with over one third of Background worldwide populations currently at risk. Determining the genetic diversity of plasmodium parasites is essential for assessing the efficacy of antimalarial drugs and for future vaccine development. This study investigated the genetic diversity of merozoite surface protein 2 (MSP2), and multiplicity of P. falciparum infection ...

The inhibition of protein synthesis in L cells by vesicular stomatitis virus (VSV) requires the synthesis of new protein subsequent to virus infection. However, two mechanisms may be involved in the inhibition of cell protein synthesis by VSV: an initial, multiplicity-dependent, ultraviolet-insensitive inhibition and a progressive, ultraviolet-sensitive inhibition.

Abbreviations: Egr-1, early growth response gene-1; EGFR, epidermal growth factor receptor; ERK, extracellular-regulated kinases; MAP kinases, mitogen-activated protein kinases; PAI, pathogenicity island; cag, cytotoxin associated genes; PMA, Phorbol-12myristate-13-acetate; MOI, Multiplicity of infection; GAPDH, glyceraldehyde-3phosphate dehydrogenase; PCR, polymerase chain reaction; PBS, phosp...