Ricky L. Ulrich

The bacterial gene lfpA influences the potent induction of calcitonin receptor and osteoclast-related genes in Burkholderia pseudomallei-induced TRAP-positive multinucleated giant cells (2007)

Boddey, Justin Andrew, Day, Christopher, Flegg, Cameron, Ulrich, Ricky L., Stephens, Sebastien Robert, Beacham, Ifor Rhys, ...

Burkholderia pseudomallei is a facultative intracellular pathogen and the causative agent of melioidosis, a spectrum of potentially fatal diseases endemic in Northern Australia and South-East Asia....

Bacterial genome adaptation to niches: Divergence of the potential virulence genes in three Burkholderiaspecies of different survival strategies (2005)

Kim, H Stanley, Schell, Mark A, Yu, Yan, Ulrich, Ricky L, Sarria, Saul H, Nierman, William C, ...

Abstract Background Two closely related species Burkholderia mallei (Bm) and Burkholderia pseudomallei (Bp) are serious human health hazards and are potential bio-warfare agents, whereas another...

BioMed Central (2005)

Bmc Genomics, H Stanley Kim, Mark A Schell, Yan Yu, Ricky L Ulrich, Saul H Sarria, ...

Research article Bacterial genome adaptation to niches: Divergence of the potential virulence genes in three Burkholderia species of different survival strategies

Quorum Quenching: Enzymatic Disruption of N-Acylhomoserine Lactone-Mediated Bacterial Communication in Burkholderia thailandensis (1998)

Ulrich, Ricky L.

Many species of gram-negative bacteria communicate by synthesizing, secreting, and responding to N-acylhomoserine lactones (AHLs), a mechanism termed quorum sensing. Several investigations have...

Quorum Sensing: A transcriptional Regulatory System Involved in the Pathogenicity of Burkholderia mallei (1998)

Ulrich, Ricky L., DeShazer, David, Hines, Harry B., Jeddeloh, Jeffrey A.

Numerous gram-negative bacterial pathogens regulate virulence factor expression by using a cell density mechanism termed quorum sensing (QS). An in silico analysis of the Burkholderia mallei ATCC...

Quorum Sensing: A Transcriptional Regulatory System Involved in the Pathogenicity of Burkholderia mallei (1998)

Ulrich, Ricky L., DeShazer, David, Hines, Harry B., Jeddeloh, Jeffrey A.

Numerous gram-negative bacterial pathogens regulate virulence factor expression by using a cell density mechanism termed quorum sensing (QS). An in silico analysis of the Burkholderia mallei ATCC...

Bacterial Genome Adaptation to Niches: Divergence of the Potential Virulence Genes in Three Burkholderia Species of Different Survival Strategies (1998)

Kim, H. S., Schell, Mark A., Yu, Yan, Ulrich, Ricky L., Sarria, Saul H., Nierman, William C., ...

Two closely related species -- Burkholderia mallei (Bm) and Burkholderia pseudomallei (Bp) -- are serious human health hazards and are potential bio-warfare agents, whereas another closely related...

Development of a Polymerase Chain Reaction Assay for the Specific Identification of Burkholderia mallei and Differentiation from Burkholderia pseudomallei and Other Closely Related Burkholderiaceae (1998)

Ulrich, Ricky L., Ulrich, Melanie P., Schell, Mark A., Kim, H. S., DeShazer, David

Burkholderia mallei and Burkholderia pseudomallei, the etiologic agents responsible for glanders and melioidosis, respectively, are genetically and phenotypically similar and are category B biothreat...

The Animal Pathogen-Like Type III Secretion System is Required for the Intracellular Survival of Burkholderia mallei within J774.2 Macrophages (1998)

Ribot, Wilson J., Ulrich, Ricky L.

Burkholderia mallei is a highly infectious gram-negative pathogen and is the causative agent of human and animal glanders. By generating polar mutations (disruption of bsaQ and bsaZ) in the B. mallei...

Characterization of an Isolate That Uses Vinyl Chloride as a Growth Substrate under Aerobic Conditions

Verce, Matthew F., Ulrich, Ricky L., Freedman, David L.

An aerobic enrichment culture was developed by using vinyl chloride (VC) as the sole organic carbon and electron donor source. VC concentrations as high as 7.3 mM were biodegraded without apparent...

Typing and Subtyping of 83 Clinical Isolates Purified from Surgically Implanted Silicone Feeding Tubes by Random Amplified Polymorphic DNA Amplification

Dautle, Melanie P., Ulrich, Ricky L., Hughes, Thomas A.

In this study, 83 clinical isolates purified from biofilms colonizing 18 silicone gastrostomy devices (12 “buttons” and six tubes converted to skin level devices) were selected for subtype...

Type III Secretion: a Virulence Factor Delivery System Essential for the Pathogenicity of Burkholderia mallei

Ulrich, Ricky L., DeShazer, David

By creating mutations in the Burkholderia mallei ATCC 23344 animal pathogen-like type III secretion system (TTSS), this study analyzes the correlation between type III secretion and the pathogenicity...

Mutational Analysis and Biochemical Characterization of the Burkholderia thailandensis DW503 Quorum-Sensing Network

Ulrich, Ricky L., Hines, Harry B., Parthasarathy, N., Jeddeloh, Jeffrey A.

Numerous gram-negative bacteria communicate and regulate gene expression through a cell density-responsive mechanism termed quorum sensing (QS), which involves the synthesis and perception of...

Structural flexibility in the Burkholderia mallei genome

Nierman, William C., DeShazer, David, Kim, H. Stanley, Tettelin, Herve, Nelson, Karen E., Feldblyum, Tamara, ...

The complete genome sequence of Burkholderia mallei ATCC 23344 provides insight into this highly infectious bacterium's pathogenicity and evolutionary history. B. mallei, the etiologic agent of...

Quorum Quenching: Enzymatic Disruption of N-Acylhomoserine Lactone-Mediated Bacterial Communication in Burkholderia thailandensis

Ulrich, Ricky L.

Many species of gram-negative bacteria communicate by synthesizing, secreting, and responding to N-acylhomoserine lactones (AHLs), a mechanism termed quorum sensing. Several investigations have...

Quorum Sensing: a Transcriptional Regulatory System Involved in the Pathogenicity of Burkholderia mallei

Ulrich, Ricky L., DeShazer, David, Hines, Harry B., Jeddeloh, Jeffrey A.

Numerous gram-negative bacterial pathogens regulate virulence factor expression by using a cell density mechanism termed quorum sensing (QS). An in silico analysis of the Burkholderia mallei ATCC...

Actin-Binding Proteins from Burkholderia mallei and Burkholderia thailandensis Can Functionally Compensate for the Actin-Based Motility Defect of a Burkholderia pseudomallei bimA Mutant

Stevens, Joanne M., Ulrich, Ricky L., Taylor, Lowrie A., Wood, Michael W., DeShazer, David, Stevens, Mark P., ...

Recently we identified a bacterial factor (BimA) required for actin-based motility of Burkholderia pseudomallei. Here we report that Burkholderia mallei and Burkholderia thailandensis are capable of...

The Animal Pathogen-Like Type III Secretion System Is Required for the Intracellular Survival of Burkholderia mallei within J774.2 Macrophages

Ribot, Wilson J., Ulrich, Ricky L.

Burkholderia mallei is a highly infectious gram-negative pathogen and is the causative agent of human and animal glanders. By generating polar mutations (disruption of bsaQ and bsaZ) in the B. mallei...

Characterization of an Isolate That Uses Vinyl Chloride as a Growth Substrate under Aerobic Conditions

Verce, Matthew F., Ulrich, Ricky L., Freedman, David L.

An aerobic enrichment culture was developed by using vinyl chloride (VC) as the sole organic carbon and electron donor source. VC concentrations as high as 7.3 mM were biodegraded without apparent...

Typing and Subtyping of 83 Clinical Isolates Purified from Surgically Implanted Silicone Feeding Tubes by Random Amplified Polymorphic DNA Amplification

Dautle, Melanie P., Ulrich, Ricky L., Hughes, Thomas A.

In this study, 83 clinical isolates purified from biofilms colonizing 18 silicone gastrostomy devices (12 “buttons” and six tubes converted to skin level devices) were selected for subtype...

Type III Secretion: a Virulence Factor Delivery System Essential for the Pathogenicity of Burkholderia mallei

Ulrich, Ricky L., DeShazer, David

By creating mutations in the Burkholderia mallei ATCC 23344 animal pathogen-like type III secretion system (TTSS), this study analyzes the correlation between type III secretion and the pathogenicity...

Mutational Analysis and Biochemical Characterization of the Burkholderia thailandensis DW503 Quorum-Sensing Network

Ulrich, Ricky L., Hines, Harry B., Parthasarathy, N., Jeddeloh, Jeffrey A.

Numerous gram-negative bacteria communicate and regulate gene expression through a cell density-responsive mechanism termed quorum sensing (QS), which involves the synthesis and perception of...

Structural flexibility in the Burkholderia mallei genome

Nierman, William C., DeShazer, David, Kim, H. Stanley, Tettelin, Herve, Nelson, Karen E., Feldblyum, Tamara, ...

The complete genome sequence of Burkholderia mallei ATCC 23344 provides insight into this highly infectious bacterium's pathogenicity and evolutionary history. B. mallei, the etiologic agent of...

Quorum Quenching: Enzymatic Disruption of N-Acylhomoserine Lactone-Mediated Bacterial Communication in Burkholderia thailandensis

Ulrich, Ricky L.

Many species of gram-negative bacteria communicate by synthesizing, secreting, and responding to N-acylhomoserine lactones (AHLs), a mechanism termed quorum sensing. Several investigations have...

Quorum Sensing: a Transcriptional Regulatory System Involved in the Pathogenicity of Burkholderia mallei

Ulrich, Ricky L., DeShazer, David, Hines, Harry B., Jeddeloh, Jeffrey A.

Numerous gram-negative bacterial pathogens regulate virulence factor expression by using a cell density mechanism termed quorum sensing (QS). An in silico analysis of the Burkholderia mallei ATCC...

Actin-Binding Proteins from Burkholderia mallei and Burkholderia thailandensis Can Functionally Compensate for the Actin-Based Motility Defect of a Burkholderia pseudomallei bimA Mutant

Stevens, Joanne M., Ulrich, Ricky L., Taylor, Lowrie A., Wood, Michael W., DeShazer, David, Stevens, Mark P., ...

Recently we identified a bacterial factor (BimA) required for actin-based motility of Burkholderia pseudomallei. Here we report that Burkholderia mallei and Burkholderia thailandensis are capable of...

The Animal Pathogen-Like Type III Secretion System Is Required for the Intracellular Survival of Burkholderia mallei within J774.2 Macrophages

Ribot, Wilson J., Ulrich, Ricky L.

Burkholderia mallei is a highly infectious gram-negative pathogen and is the causative agent of human and animal glanders. By generating polar mutations (disruption of bsaQ and bsaZ) in the B. mallei...

Octanoyl-Homoserine Lactone Is the Cognate Signal for Burkholderia mallei BmaR1-BmaI1 Quorum Sensing▿

Duerkop, Breck A., Ulrich, Ricky L., Greenberg, E. Peter

Acyl-homoserine lactones (HSLs) serve as quorum-sensing signals for many Proteobacteria. Members of the LuxI family of signal generators catalyze the production of acyl-HSLs, which bind to a cognate...

The Burkholderia mallei BmaR3-BmaI3 Quorum-Sensing System Produces and Responds to N-3-Hydroxy-Octanoyl Homoserine Lactone▿

Duerkop, Breck A., Herman, Jake P., Ulrich, Ricky L., Churchill, Mair E. A., Greenberg, E. Peter

Burkholderia mallei has two acyl-homoserine lactone (acyl-HSL) signal generator-receptor pairs and two additional signal receptors, all of which contribute to virulence. We show that B. mallei...