Full Text Journal Articles by
Author Flavia Negrete

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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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Prevalence, Distribution, and Phylogeny of Type Two Toxin-Antitoxin Genes Possessed by Cronobacter Species where C. sakazakii Homologs Follow Sequence Type Lineages.

Samantha Finkelstein, Flavia Negrete, Hyein Jang, Jayanthi Gangiredla, Mark Mammel, Isha R Patel, Hannah R Chase, JungHa Woo, YouYoung Lee, Caroline Z Wang, Leah Weinstein, Ben D Tall, Gopal R Gopinath,

Cronobacter species are a group of foodborne pathogenic bacteria that cause both intestinal and systemic human disease in individuals of all age groups. Little is known about the mechanisms that Cronobacter employ to survive and persist in foods and other environments. Toxin-antitoxin (TA) genes are thought to play a role ... Read more >>

Microorganisms (Microorganisms)
[2019, 7(11):]

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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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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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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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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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Draft Genome Sequence of Cronobacter sakazakii GP1999, Sequence Type 145, an Epiphytic Isolate Obtained from the Tomato's Rhizoplane/Rhizosphere Continuum.

Hannah R Chase, Leo Eberl, Roger Stephan, HyeJin Jeong, Chaeyoon Lee, Samantha Finkelstein, Flavia Negrete, Jayanthi Gangiredla, Isha Patel, Ben D Tall, Gopal R Gopinath, Angelika Lehner,

We present here the draft genome of Cronobacter sakazakii GP1999, a sequence type 145 strain isolated from the rhizosphere of tomato plants. Assembly and annotation of the genome resulted in a genome of 4,504,670 bp in size, with 4,148 coding sequences, and a GC content of 56.8%. ... Read more >>

Genome Announc (Genome announcements)
[2017, 5(31):]

Cited: 2 times

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Draft Genome Sequences of Enterotoxigenic Bacillus cereus Strains Obtained from Powdered Infant Formula.

Laurenda Carter, Hannah R Chase, Hyerim Choi, SoYoung Jun, JiHyeon Park, Seungeun Jeong, MiJeong Kim, KyuYoung Han, ChaeYoon Lee, HyeJin Jeong, Samantha Finkelstein, Flavia Negrete, Hediye N Cinar, Ben D Tall, Gopal R Gopinath,

We introduce the draft genome sequences of five enterotoxigenic Bacillus cereus strains: Bc 12, Bc 67, Bc 111, Bc 112, and Bc 113, which were obtained from powdered infant formula. The genome sizes of the strains ranged from 5.5 to 5.8 Mb, and the G+C contents were ~35.2%. ... Read more >>

Genome Announc (Genome announcements)
[2017, 5(8):]

Cited: 0 times

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Salmonella enterica serovar Infantis from Food and Human Infections, Switzerland, 2010-2015: Poultry-Related Multidrug Resistant Clones and an Emerging ESBL Producing Clonal Lineage.

Denise Hindermann, Gopal Gopinath, Hannah Chase, Flavia Negrete, Denise Althaus, Katrin Zurfluh, Ben D Tall, Roger Stephan, Magdalena Nüesch-Inderbinen,

Objectives: The aim of this study was to characterize a collection of 520 Salmonella enterica serovar Infantis strains isolated from food (poultry meat), human infections and environmental sources from the years 2010, 2013 and 2015 in Switzerland. Methods: We performed antimicrobial susceptibility testing and pulsed-field gel electrophoresis (PFGE) analysis on ... Read more >>

Front Microbiol (Frontiers in microbiology)
[2017, 8:1322]

Cited: 8 times

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Analysis and Characterization of Proteins Associated with Outer Membrane Vesicles Secreted by Cronobacter spp.

Mahendra H Kothary, Gopal R Gopinath, Jayanthi Gangiredla, Prasad V Rallabhandi, Lisa M Harrison, Qiong Q Yan, Hannah R Chase, Boram Lee, Eunbi Park, YeonJoo Yoo, Taejung Chung, Samantha B Finkelstein, Flavia J Negrete, Isha R Patel, Laurenda Carter, Venugopal Sathyamoorthy, Séamus Fanning, Ben D Tall,

Little is known about secretion of outer membrane vesicles (OMVs) by Cronobacter. In this study, OMVs isolated from Cronobacter sakazakii, Cronobacter turicensis, and Cronobacter malonaticus were examined by electron microscopy (EM) and their associated outer membrane proteins (OMP) and genes were analyzed by SDS-PAGE, protein sequencing, BLAST, PCR, and DNA ... Read more >>

Front Microbiol (Frontiers in microbiology)
[2017, 8:134]

Cited: 5 times

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