Awdhesh Kalia

Helicobacter pylori Evolution: Lineage- Specific Adaptations in Homologs of Eukaryotic Sel1-Like Genes (2007)

Masako Ogura, J. Christian Perez, Hae-Kyung Lee, Geidrius Dailide, Shumin Tan, ...

Geographic partitioning is postulated to foster divergence of Helicobacter pylori populations as an adaptive response to local differences in predominant host physiology. H. pylori's ability to...

Helicobacter pylori Evolution: Lineage-Specific Adaptations in Homologs of Eukaryotic Sel1-Like Genes (2007)

Masako Ogura, Christian Perez, Peer Mittl, Hae-Kyung Lee, Geidrius Dailide, Shumin Tan, ...

Geographic partitioning is postulated to foster divergence of Helicobacter pylori populations as an adaptive response to local differences in predominant host physiology. H. pylori's ability to...

Functional Adaptation of BabA, the H. pylori ABO Blood Group Antigen Binding Adhesin (2004)

Aspholm-Hurtig, Marina, Dailide, Giedrius, Lahmann, Martina, Kalia, Awdhesh, Ilver, Dag, Roche, Niamh, ...

Adherence by Helicobacter pylori increases the risk of gastric disease. Here, we report that more than 95% of strains that bind fucosylated blood group antigen bind A, B, and O antigens...

Recombination within natural populations of pathogenic bacteria: Short-term empirical estimates and long-term phylogenetic consequences

Feil, Edward J., Holmes, Edward C., Bessen, Debra E., Chan, Man-Suen, Day, Nicholas P. J., Enright, Mark C., ...

The identification of clones within bacterial populations is often taken as evidence for a low rate of recombination, but the validity of this inference is rarely examined. We have used statistical...

Multilocus Sequence Typing of Streptococcus pyogenes and the Relationships between emm Type and Clone

Enright, Mark C., Spratt, Brian G., Kalia, Awdhesh, Cross, John H., Bessen, Debra E.

Multilocus sequence typing (MLST) is a tool that can be used to study the molecular epidemiology and population genetic structure of microorganisms. A MLST scheme was developed for Streptococcus...

Directional Gene Movement from Human-Pathogenic to Commensal-Like Streptococci

Kalia, Awdhesh, Enright, Mark C., Spratt, Brian G., Bessen, Debra E.

Group A streptococci (GAS) are highly pathogenic for humans, and their closest genetic relatives, group C and G streptococci (GCS and GGS, respectively), are generally regarded as commensals,...

Genomic Localization of a T Serotype Locus to a Recombinatorial Zone Encoding Extracellular Matrix-Binding Proteins in Streptococcus pyogenes

Bessen, Debra E., Kalia, Awdhesh

Streptococcus pyogenes is an important bacterial pathogen afflicting humans. A striking feature is its extraordinary biological diversity, evident in the wide range of diseases it can cause and the...

Influence of Recombination and Niche Separation on the Population Genetic Structure of the Pathogen Streptococcus pyogenes

Kalia, Awdhesh, Spratt, Brian G., Enright, Mark C., Bessen, Debra E.

The throat and skin of the human host are the principal reservoirs for the bacterial pathogen Streptococcus pyogenes. The emm locus encodes structurally heterogeneous surface fibrils that play...

Natural Selection and Evolution of Streptococcal Virulence Genes Involved in Tissue-Specific Adaptations

Kalia, Awdhesh, Bessen, Debra E.

The molecular mechanisms underlying niche adaptation in bacteria are not fully understood. Primary infection by the pathogen group A streptococcus (GAS) takes place at either the throat or the skin...

Multilocus Sequence Typing of Streptococcus pyogenes Representing Most Known emm Types and Distinctions among Subpopulation Genetic Structures

McGregor, Karen F., Spratt, Brian G., Kalia, Awdhesh, Bennett, Alicia, Bilek, Nicole, Beall, Bernard, ...

A long-term goal is to characterize the full range of genetic diversity within Streptococcus pyogenes as it exists in the world today. Since the emm locus is subject to strong diversifying selection,...

Evolutionary Dynamics of Insertion Sequences in Helicobacter pylori

Kalia, Awdhesh, Mukhopadhyay, Asish K., Dailide, Giedrius, Ito, Yoshiyki, Azuma, Takeshi, Wong, Benjamin C. Y., ...

Prokaryotic insertion sequence (IS) elements behave like parasites in terms of their ability to invade and proliferate in microbial gene pools and like symbionts when they coevolve with their...

Sequence Organization and Insertion Specificity of the Novel Chimeric ISHp609 Transposable Element of Helicobacter pylori†

Kersulyte, Dangeruta, Kalia, Awdhesh, Zhang, MaoJun, Lee, Hae-Kyung, Subramaniam, Dharmalingam, Kiuduliene, Levute, ...

Here we describe ISHp609 of Helicobacter pylori, a new member of the IS605 mobile element family that is novel and contains two genes whose functions are unknown, jhp960 and jhp961, in addition to...

Recombination within natural populations of pathogenic bacteria: Short-term empirical estimates and long-term phylogenetic consequences

Feil, Edward J., Holmes, Edward C., Bessen, Debra E., Chan, Man-Suen, Day, Nicholas P. J., Enright, Mark C., ...

The identification of clones within bacterial populations is often taken as evidence for a low rate of recombination, but the validity of this inference is rarely examined. We have used statistical...

Multilocus Sequence Typing of Streptococcus pyogenes and the Relationships between emm Type and Clone

Enright, Mark C., Spratt, Brian G., Kalia, Awdhesh, Cross, John H., Bessen, Debra E.

Multilocus sequence typing (MLST) is a tool that can be used to study the molecular epidemiology and population genetic structure of microorganisms. A MLST scheme was developed for Streptococcus...

Directional Gene Movement from Human-Pathogenic to Commensal-Like Streptococci

Kalia, Awdhesh, Enright, Mark C., Spratt, Brian G., Bessen, Debra E.

Group A streptococci (GAS) are highly pathogenic for humans, and their closest genetic relatives, group C and G streptococci (GCS and GGS, respectively), are generally regarded as commensals,...

Genomic Localization of a T Serotype Locus to a Recombinatorial Zone Encoding Extracellular Matrix-Binding Proteins in Streptococcus pyogenes

Bessen, Debra E., Kalia, Awdhesh

Streptococcus pyogenes is an important bacterial pathogen afflicting humans. A striking feature is its extraordinary biological diversity, evident in the wide range of diseases it can cause and the...

Influence of Recombination and Niche Separation on the Population Genetic Structure of the Pathogen Streptococcus pyogenes

Kalia, Awdhesh, Spratt, Brian G., Enright, Mark C., Bessen, Debra E.

The throat and skin of the human host are the principal reservoirs for the bacterial pathogen Streptococcus pyogenes. The emm locus encodes structurally heterogeneous surface fibrils that play...

Natural Selection and Evolution of Streptococcal Virulence Genes Involved in Tissue-Specific Adaptations

Kalia, Awdhesh, Bessen, Debra E.

The molecular mechanisms underlying niche adaptation in bacteria are not fully understood. Primary infection by the pathogen group A streptococcus (GAS) takes place at either the throat or the skin...

Multilocus Sequence Typing of Streptococcus pyogenes Representing Most Known emm Types and Distinctions among Subpopulation Genetic Structures

McGregor, Karen F., Spratt, Brian G., Kalia, Awdhesh, Bennett, Alicia, Bilek, Nicole, Beall, Bernard, ...

A long-term goal is to characterize the full range of genetic diversity within Streptococcus pyogenes as it exists in the world today. Since the emm locus is subject to strong diversifying selection,...

Evolutionary Dynamics of Insertion Sequences in Helicobacter pylori

Kalia, Awdhesh, Mukhopadhyay, Asish K., Dailide, Giedrius, Ito, Yoshiyki, Azuma, Takeshi, Wong, Benjamin C. Y., ...

Prokaryotic insertion sequence (IS) elements behave like parasites in terms of their ability to invade and proliferate in microbial gene pools and like symbionts when they coevolve with their...

Sequence Organization and Insertion Specificity of the Novel Chimeric ISHp609 Transposable Element of Helicobacter pylori†

Kersulyte, Dangeruta, Kalia, Awdhesh, Zhang, MaoJun, Lee, Hae-Kyung, Subramaniam, Dharmalingam, Kiuduliene, Levute, ...

Here we describe ISHp609 of Helicobacter pylori, a new member of the IS605 mobile element family that is novel and contains two genes whose functions are unknown, jhp960 and jhp961, in addition to...

Helicobacter pylori Evolution: Lineage- Specific Adaptations in Homologs of Eukaryotic Sel1-Like Genes

Ogura, Masako, Perez, J. Christian, Mittl, Peer R. E, Lee, Hae-Kyung, Dailide, Geidrius, Tan, Shumin, ...

Geographic partitioning is postulated to foster divergence of Helicobacter pylori populations as an adaptive response to local differences in predominant host physiology. H. pylori's ability to...