Full Text Journal Articles by
Author Athmanya Eshwar

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The Secretion of Toxins and Other Exoproteins of Cronobacter: Role in Virulence, Adaption, and Persistence.

Hyein Jang, Gopal R Gopinath, Athmanya Eshwar, Shabarinath Srikumar, Scott Nguyen, Jayanthi Gangiredla, Isha R Patel, Samantha B Finkelstein, Flavia Negrete, JungHa Woo, YouYoung Lee, Séamus Fanning, Roger Stephan, Ben D Tall, Angelika Lehner,

: Cronobacter species are considered an opportunistic group of foodborne pathogenic bacteria capable of causing both intestinal and systemic human disease. This review describes common virulence themes shared among the seven Cronobacter species and describes multiple exoproteins secreted by Cronobacter, many of which are bacterial toxins that may play a ... Read more >>

Microorganisms (Microorganisms)
[2020, 8(2):]

Cited: 0 times

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Molecular characterisation of multi-drug resistant Escherichia coli of bovine origin.

João Anes, Scott V Nguyen, Athmanya K Eshwar, Evonne McCabe, Guerrino Macori, Daniel Hurley, Angelika Lehner, Séamus Fanning,

Antimicrobial resistance reported in bacteria of animal origin is considered a major challenge to veterinary public health. In this study, the genotypic and phenotypic characterisation of twelve Escherichia coli isolates of bovine origin is reported. Twelve bacterial isolates of animal origin were selected from a previous study based on their ... Read more >>

Vet. Microbiol. (Veterinary microbiology)
[2020, 242:108566]

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Whole-Genome Sequencing-Based Characterization of 100 Listeria monocytogenes Isolates Collected from Food Processing Environments over a Four-Year Period.

Daniel Hurley, Laura Luque-Sastre, Craig T Parker, Steven Huynh, Athmanya K Eshwar, Scott V Nguyen, Nicholas Andrews, Alexandra Moura, Edward M Fox, Kieran Jordan, Angelika Lehner, Roger Stephan, Séamus Fanning,

Listeria monocytogenes is frequently found in foods and processing facilities, where it can persist, creating concerns for the food industry. Its ability to survive under a wide range of environmental conditions enhances the potential for cross-contamination of the final food products, leading to possible outbreaks of listeriosis. In this study, ... Read more >>

mSphere (mSphere)
[2019, 4(4):]

Cited: 1 time

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Variable Carbon Source Utilization, Stress Resistance, and Virulence Profiles Among Listeria monocytogenes Strains Responsible for Listeriosis Outbreaks in Switzerland.

Francis Muchaamba, Athmanya K Eshwar, Marc J A Stevens, Ueli von Ah, Taurai Tasara,

A combination of phenotype microarrays, targeted stress resistance and virulence assays and comparative genome analysis was used to compare a set of Listeria monocytogenes strains including those involved in previous Swiss foodborne listeriosis outbreaks. Despite being highly syntenic in gene content these strains showed significant phenotypic variation in utilization of ... Read more >>

Front Microbiol (Frontiers in microbiology)
[2019, 10:957]

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Atypical Hemolytic Listeria innocua Isolates Are Virulent, albeit Less than Listeria monocytogenes.

Alexandra Moura, Olivier Disson, Morgane Lavina, Pierre Thouvenot, Lei Huang, Alexandre Leclercq, Maria Fredriksson-Ahomaa, Athmanya K Eshwar, Roger Stephan, Marc Lecuit,

Listeria innocua is considered a nonpathogenic Listeria species. Natural atypical hemolytic L. innocua isolates have been reported but have not been characterized in detail. Here, we report the genomic and functional characterization of representative isolates from the two known natural hemolytic L. innocua clades. Whole-genome sequencing confirmed the presence of ... Read more >>

Infect. Immun. (Infection and immunity)
[2019, 87(4):]

Cited: 1 time

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Draft genomes of Cronobacter sakazakii strains isolated from dried spices bring unique insights into the diversity of plant-associated strains.

Hyein Jang, Jungha Woo, Youyoung Lee, Flavia Negrete, Samantha Finkelstein, Hannah R Chase, Nicole Addy, Laura Ewing, Junia Jean Gilles Beaubrun, Isha Patel, Jayanthi Gangiredla, Athmanya Eshwar, Ziad W Jaradat, Kunho Seo, Srikumar Shabarinath, Séamus Fanning, Roger Stephan, Angelika Lehner, Ben D Tall, Gopal R Gopinath,

Cronobacter sakazakii is a Gram-negative opportunistic pathogen that causes life- threatening infantile infections, such as meningitis, septicemia, and necrotizing enterocolitis, as well as pneumonia, septicemia, and urinary tract and wound infections in adults. Here, we report 26 draft genome sequences of C. sakazakii, which were obtained from dried spices from ... Read more >>

Stand Genomic Sci (Standards in genomic sciences)
[2018, 13:35]

Cited: 2 times

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Interaction of matrix metalloproteinase-9 and Zpx in Cronobacter turicensis LMG 23827T mediated infections in the zebrafish model.

Athmanya Konegadde Eshwar, Nina Wolfrum, Roger Stephan, Séamus Fanning, Angelika Lehner,

Bacteria belonging to the genus Cronobacter have been recognized as causative agents of life-threatening systemic infections primarily in premature and low-birthweight neonates. Validation of putative bacterial virulence components as well as host factors potentially involved in the response to infection has been hampered in the past by the availability of ... Read more >>

Cell. Microbiol. (Cellular microbiology)
[2018, 20(11):e12888]

Cited: 1 time

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Whole-Genome Sequences of Cronobacter sakazakii Isolates Obtained from Foods of Plant Origin and Dried-Food Manufacturing Environments.

Hyein Jang, Nicole Addy, Laura Ewing, Junia Jean-Gilles Beaubrun, YouYoung Lee, JungHa Woo, Flavia Negrete, Samantha Finkelstein, Ben D Tall, Angelika Lehner, Athmanya Eshwar, Gopal R Gopinath,

Here, we present draft genome sequences of 29 Cronobacter sakazakii isolates obtained from foods of plant origin and dried-food manufacturing facilities. Assemblies and annotations resulted in genome sizes ranging from 4.3 to 4.5 Mb and 3,977 to 4,256 gene-coding sequences with G+C contents of ∼57.0%. ... Read more >>

Genome Announc (Genome announcements)
[2018, 6(15):]

Cited: 2 times

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Genomic characterization of malonate positive Cronobacter sakazakii serotype O:2, sequence type 64 strains, isolated from clinical, food, and environment samples.

Gopal R Gopinath, Hannah R Chase, Jayanthi Gangiredla, Athmanya Eshwar, Hyein Jang, Isha Patel, Flavia Negrete, Samantha Finkelstein, Eunbi Park, TaeJung Chung, YeonJoo Yoo, JungHa Woo, YouYoung Lee, Jihyeon Park, Hyerim Choi, Seungeun Jeong, Soyoung Jun, Mijeong Kim, Chaeyoon Lee, HyeJin Jeong, Séamus Fanning, Roger Stephan, Carol Iversen, Felix Reich, Günter Klein, Angelika Lehner, Ben D Tall,

Malonate utilization, an important differential trait, well recognized as being possessed by six of the seven Cronobacter species is thought to be largely absent in Cronobacter sakazakii (Csak). The current study provides experimental evidence that confirms the presence of a malonate utilization operon in 24 strains of sequence type (ST) ... Read more >>

Gut Pathog (Gut pathogens)
[2018, 10:11]

Cited: 2 times

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Cold-Shock Domain Family Proteins (Csps) Are Involved in Regulation of Virulence, Cellular Aggregation, and Flagella-Based Motility in Listeria monocytogenes.

Athmanya K Eshwar, Claudia Guldimann, Anna Oevermann, Taurai Tasara,

Cold shock-domain family proteins (Csps) are highly conserved nucleic acid binding proteins regulating the expression of various genes including those involved in stress resistance and virulence in bacteria. We show here that Csps are involved in virulence, cell aggregation and flagella-based extracellular motility of Listeria monocytogenes. A L. monocytogenes mutant ... Read more >>

Front Cell Infect Microbiol (Frontiers in cellular and infection microbiology)
[2017, 7:453]

Cited: 6 times

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Comparative Genomic Characterization of the Highly Persistent and Potentially Virulent Cronobacter sakazakii ST83, CC65 Strain H322 and Other ST83 Strains.

Hannah R Chase, Gopal R Gopinath, Athmanya K Eshwar, Andrea Stoller, Claudia Fricker-Feer, Jayanthi Gangiredla, Isha R Patel, Hediye N Cinar, HyeJin Jeong, ChaeYoon Lee, Flavia Negrete, Samantha Finkelstein, Roger Stephan, Ben D Tall, Angelika Lehner,

Cronobacter (C.) sakazakii is an opportunistic pathogen and has been associated with serious infections with high mortality rates predominantly in pre-term, low-birth weight and/or immune compromised neonates and infants. Infections have been epidemiologically linked to consumption of intrinsically and extrinsically contaminated lots of reconstituted powdered infant formula (PIF), thus contamination ... Read more >>

Front Microbiol (Frontiers in microbiology)
[2017, 8:1136]

Cited: 6 times

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Linking Genomo- and Pathotype: Exploiting the Zebrafish Embryo Model to Investigate the Divergent Virulence Potential among Cronobacter spp.

Athmanya K Eshwar, Ben D Tall, Jayanthi Gangiredla, Gopal R Gopinath, Isha R Patel, Stephan C F Neuhauss, Roger Stephan, Angelika Lehner,

Bacteria belonging to the genus Cronobacter have been recognized as causative agents of life-threatening systemic infections primarily in premature, low-birth weight and immune-compromised neonates. Apparently not all Cronobacter species are linked to infantile infections and it has been proposed that virulence varies among strains. Whole genome comparisons and in silico ... Read more >>

PLoS ONE (PloS one)
[2016, 11(6):e0158428]

Cited: 4 times

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The DSF type quorum sensing signalling system RpfF/R regulates diverse phenotypes in the opportunistic pathogen Cronobacter.

Angela Suppiger, Athmanya Konegadde Eshwar, Roger Stephan, Volkhard Kaever, Leo Eberl, Angelika Lehner,

Several bacterial pathogens produce diffusible signal factor (DSF)-type quorum sensing (QS) signals to control biofilm formation and virulence. Previous work showed that in Burkholderia cenocepacia the RpfFBc/RpfR system is involved in sensing and responding to DSF signals and that this signal/sensor gene pair is highly conserved in several bacterial species ... Read more >>

Sci Rep (Scientific reports)
[2016, 6:18753]

Cited: 10 times

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Evaluation of zebrafish as a model to study the pathogenesis of the opportunistic pathogen Cronobacter turicensis.

Alexander Fehr, Athmanya K Eshwar, Stephan C F Neuhauss, Maja Ruetten, Angelika Lehner, Lloyd Vaughan,

Bacteria belonging to the genus Cronobacter spp. have been recognized as causative agents of life-threatening systemic infections, primarily in premature, low-birth weight and/or immune-compromised neonates. Knowledge remains scarce regarding the underlying molecular mechanisms of disease development. In this study, we evaluated the use of a zebrafish model to study the ... Read more >>

Emerg Microbes Infect (Emerging microbes & infections)
[2015, 4(5):e29]

Cited: 8 times

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Influence of FkpA variants on survival and replication of Cronobacter spp. in human macrophages.

Athmanya Konegadde Eshwar, Taurai Tasara, Roger Stephan, Angelika Lehner,

Members of the genus Cronobacter are responsible for cases of meningitis and bacteremia with high fatality rates in neonates. Macrophage uptake of invading microbes is an innate process, and it has been proposed that macrophage infectivity potentiator (Mip) like proteins enhance the ability of pathogens to survive within macrophages. Cronobacter ... Read more >>

Res. Microbiol. (Research in microbiology)
[2015, 166(3):186-195]

Cited: 6 times

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