U. Ullmann

Publications177
h-index25
Citations2,449
Highly Influential Citations72
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Derivation of human embryonic stem cell lines from embryos obtained after IVF and after PGD for monogenic disorders.
BACKGROUND Human embryonic stem (hES) cells are pluripotent cells usually derived from the inner cell mass (ICM) of blastocysts. Because of their ability to differentiate into all three embryonic… Expand
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A Novel Type of AmpC β-Lactamase, ACC-1, Produced by a Klebsiella pneumoniae Strain Causing Nosocomial Pneumonia
ABSTRACT A Klebsiella pneumoniae strain resistant to oxyimino cephalosporins was cultured from respiratory secretions of a patient suffering from nosocomial pneumonia in Kiel, Germany, in 1997. The… Expand
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Incidence of Klebsiella Species in Surface Waters and Their Expression of Virulence Factors
ABSTRACT To investigate the occurrence of different Klebsiellaspp. in aquatic environments, a total of 208 samples of natural surface waters was examined. From half (53%) of these samples,… Expand
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Quantification of Intestinal Bacterial Populations by Real-Time PCR with a Universal Primer Set and Minor Groove Binder Probes: a Global Approach to the Enteric Flora
ABSTRACT The composition of the human intestinal flora is important for the health status of the host. The global composition and the presence of specific pathogens are relevant to the effects of the… Expand
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Penicillin compared with other advanced broad spectrum antibiotics regarding antibacterial activity against oral pathogens isolated from odontogenic abscesses.
OBJECTIVES We examined the spectrum of oral pathogens found in odontogenic abscesses and their susceptibility to penicillin as well as to amoxicillin with clavulanic acid, doxycycline, clindamycin… Expand
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Capsule Impedes Adhesion to and Invasion of Epithelial Cells by Klebsiella pneumoniae
ABSTRACT The adhesion of K21a, K26, K36, and K50 capsulatedKlebsiella strains to ileocecal (HCT-8) and bladder (T24) epithelial cell lines was significantly lower than that of their corresponding… Expand
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In vitro anti-Helicobacter pylori activity of Extractum liquiritiae, glycyrrhizin and its metabolites.
OBJECTIVES To investigate the in vitro activity of Extractum liquiritiae (EL), glycyrrhizic acid (GL), glycyrrhetinic acid (GA) and a novel lipophilic derivative of glycyrrhetinic acid… Expand
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Epithelial-mesenchymal transition process in human embryonic stem cells cultured in feeder-free conditions.
Feeder-free human embryonic stem cell (hESC) culture is associated with the presence of mesenchymal-like cells appearing at the periphery of the colonies. The aim of this study was to identify this… Expand
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Serotypes, hemagglutinins, siderophore synthesis, and serum resistance of Klebsiella isolates causing human urinary tract infections.
A total of 146 Klebsiella isolates from human asymptomatic bacteriuria (n = 73), cystitis (n = 54), and acute pyelonephritis (n = 19) were examined for the presence of particular virulence factors.… Expand
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Burkholderia Is Highly Resistant to Human Beta-Defensin 3
ABSTRACT The bactericidal activity of the novel beta-defensin hBD-3 against 28 species and 55 strains of gram-positive cocci and gram-negative fermentative and nonfermentative rods was tested. All… Expand
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