Shivaramu Keelara Veerappa

Works (16)

Updated: July 18th, 2024 05:02

2024 article

Prevalence, Antimicrobial Resistance, and Diversity of <i>Campylobacter</i> Isolated from US Goat Feces: 2019 NAHMS Survey

Gensler, C. A., Hempstead, S. C., Keelara, S., Fedorka-Cray, P. J., Urie, N. J., Wiedenheft, A. M., … Jacob, M. E. (2024, July 3). FOODBORNE PATHOGENS AND DISEASE.

By: C. Gensler, S. Hempstead, S. Keelara, P. Fedorka-Cray, N. Urie, A. Wiedenheft, K. Marshall, M. Branan ...

author keywords: goats; Campylobacter; antimicrobial resistance; multilocus sequence typing; National Animal Health Monitoring System
Source: Web Of Science
Added: July 17, 2024

2022 journal article

Clustered Regularly Interspaced Short Palindromic Repeats Genotyping of Multidrug-Resistant Salmonella Heidelberg Strains Isolated From the Poultry Production Chain Across Brazil

FRONTIERS IN MICROBIOLOGY, 13.

By: D. Monte *, M. Nethery n, H. Berman n, S. Keelara n, N. Lincopan *, P. Fedorka-Cray n, R. Barrangou n , M. Landgraf *

author keywords: antibiotic resistance; CRISPR; phylogeny; Salmonella Heidelberg; foodborne disease; WGS
TL;DR: The findings underscore the potential role of S. Heidelberg as a key pathogen disseminated from farm to fork in Brazil and reinforce the importance of CRISPR-based genotyping for salmonellae and emphasized the need for continuous mitigation programs to monitor the dissemination of this high-priority pathogen. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: July 11, 2022

2022 journal article

Detection and molecular characterization of Salmonella species on US goat operations

PREVENTIVE VETERINARY MEDICINE, 208.

By: S. Hempstead n, C. Gensler n, S. Keelara n, M. Brennan *, N. Urie*, A. Wiedenheft*, K. Marshall *, B. Morningstar-Shaw* ...

author keywords: Goat; Salmonella; Antimicrobial resistance (AMR)
MeSH headings : United States / epidemiology; Animals; Humans; Goats; Gentian Violet; Salmonella; Anti-Bacterial Agents / therapeutic use; Tetracycline; Anti-Infective Agents / pharmacology; Drug Resistance, Bacterial; Microbial Sensitivity Tests / veterinary; Drug Resistance, Multiple, Bacterial / genetics
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: December 19, 2022

2022 journal article

Evidence of sheep and abattoir environment as important reservoirs of multidrug-resistant Salmonella and extended-spectrum beta-lactamase Escherichia coli

International Journal of Food Microbiology, 363, 109516.

By: N. Atlaw n , S. Keelara n, M. Correa  n, D. Foster n , W. Gebreyes*, A. Aidara-Kane*, L. Harden n, S. Thakur n , P. Fedorka-Cray n

author keywords: Salmonella; Abattoir; Sheep; Antimicrobial susceptibility; Prevalence
MeSH headings : Abattoirs; Animals; Anti-Bacterial Agents / pharmacology; Cattle; Chickens; Cross-Sectional Studies; Drug Resistance, Multiple, Bacterial; Escherichia coli / genetics; Salmonella / genetics; Sheep; Swine; beta-Lactamases / genetics
TL;DR: It is reaffirmed that sheep and their abattoir environment act as important reservoirs of AMR ESBL E. coli and MDR Salmonella in the U.S. and further studies are required to determine associated public health risks. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: January 5, 2022

2022 article

Validation of a modified IDEXX defined-substrate assay for detection of antimicrobial resistant E. coli in environmental reservoirs

Hornsby, G., Ibitoye, T. D., Keelara, S., & Harris, A. (2022, December 1). ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS, Vol. 12.

By: G. Hornsby n, T. Ibitoye n, S. Keelara n & A. Harris n 

MeSH headings : Escherichia coli; Anti-Bacterial Agents / pharmacology; Anti-Infective Agents; Bacteria; Soil; Drug Resistance, Bacterial
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: December 23, 2022

2021 journal article

Identification of CTX-M type ESBL E. coli from sheep and their abattoir environment using whole-genome sequencing

Pathogens, 10(11), 1480.

By: N. Atlaw n , S. Keelara n, M. Correa  n, D. Foster n , W. Gebreyes*, A. Aidara-Kane*, L. Harden n, S. Thakur n , P. Fedorka-Cray n

author keywords: abattoir environment; antimicrobial resistance; E. coli; ESBL; North Carolina; sheep; whole-genome sequencing
TL;DR: This is the first comprehensive AMR and WGS report on ESBL E. coli from sheep and abattoir environments in the United States and associated AMR genes, point mutations, and plasmids. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: November 16, 2021

2020 journal article

Optimizing a Screening Protocol for Potential Extended-Spectrum beta-Lactamase Escherichia coli on MacConkey Agar for Use in a Global Surveillance Program

JOURNAL OF CLINICAL MICROBIOLOGY, 58(9).

By: M. Jacob n, S. Keelara n, A. Aidara-Kane*, J. Alvarez* & P. Fedorka-Cray n

author keywords: ESBL; Escherichia coli; MacConkey agar; global surveillance
MeSH headings : Agar; Anti-Bacterial Agents / pharmacology; Escherichia coli; Escherichia coli Infections / epidemiology; Humans; Klebsiella pneumoniae; Microbial Sensitivity Tests; Reproducibility of Results; beta-Lactamases
TL;DR: The quality and reproducibility of MacConkey agar varied by manufacturer, which suggests that a single manufacturer and medium type should be selected for global monitoring efforts so that training and interpretation can be standardized. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: October 26, 2020

2019 journal article

Genomic Features of High-Priority Salmonella enterica Serovars Circulating in the Food Production Chain, Brazil, 2000-2016

SCIENTIFIC REPORTS, 9.

By: D. Monte *, N. Lincopan *, H. Berman n, L. Cerdeira *, S. Keelara n, S. Thakur n , P. Fedorka-Cray n, M. Landgraf *

MeSH headings : Agriculture; Animals; Brazil; Drug Resistance, Multiple, Bacterial / genetics; Poultry; Salmonella Infections, Animal / diagnosis; Salmonella Infections, Animal / genetics; Salmonella enterica / isolation & purification; Serogroup; Swine
TL;DR: Ocurrence and persistence of international lineages of S. enterica serovars in food production chain is supported by conserved genomes and wide virulome and resistome, which revealed presence of qnrE1 (identified for the first time in S. Typhimurium from food chain). (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 12, 2019

2019 journal article

Multidrug- and colistin-resistant Salmonella enterica 4,[5],12:i:- sequence type 34 carrying the mcr-3.1 gene on the IncHI2 plasmid recovered from a human

Journal of Medical Microbiology, 68(7), 986–990.

By: D. Monte  n, V. Nelson n, L. Cerdeira *, S. Keelara n, S. Greene, D. Griffin, S. Rath, R. Hall ...

author keywords: IncHI2; MCR-3.1; Salmonella enterica 4; [5]; 12:i:-; United States
MeSH headings : Anti-Bacterial Agents / pharmacology; Bacterial Proteins / genetics; Bacterial Proteins / metabolism; China; Drug Resistance, Multiple, Bacterial / genetics; Humans; Plasmids / genetics; Salmonella enterica / drug effects; Salmonella enterica / genetics; Salmonella enterica / isolation & purification; Transferases (Other Substituted Phosphate Groups) / genetics; Transferases (Other Substituted Phosphate Groups) / metabolism; Travel
TL;DR: Genomic analysis revealed the presence of the mcr-3.1 gene located in the globally disseminated IncHI2 plasmid, highlighting the intercontinental dissemination of the colistin-resistant S. enterica 4, [5],12:i:- ST34 pandemic clone. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, Crossref, NC State University Libraries
Added: July 22, 2019

2019 article

Multidrug- and colistin-resistant Salmonella enterica 4,[5],12:i:- sequence type 34 carrying the mcr-3.1 gene on the IncHI2 plasmid recovered from a human (vol 68, pg 986, 2019)

Monte, D. F., Nelson, V., Cerdeira, L., Keelara, S., Greene, S., Griffin, D., … Thakur, S. (2019, November). JOURNAL OF MEDICAL MICROBIOLOGY, Vol. 68, pp. 1694–1694.

By: D. Monte  n, V. Nelson n, L. Cerdeira *, S. Keelara n, S. Greene, D. Griffin, S. Rath, R. Hall ...

UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: November 25, 2019

2018 journal article

Detection and molecular characterization of sorbitol fermenting non-O157 Escherichia coli from goats

SMALL RUMINANT RESEARCH, 161, 7–12.

By: S. Nayakvadi*, C. Alemao*, H. Kumar*, R. Rajkumar*, S. Rajkumar*, E. Chakurkar*, S. Keelara*

author keywords: Non-O157 E. colt; Goats; Multiplex PCR; PFGE
TL;DR: This study has significant implications for understanding the molecular diversity of emerging pathotypes of non-O157 in young goats in terms of virulence and epidemiological aspects. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Inactivation of Escherichia coli O157:H7 and Salmonella on Fresh Herbs by Plant Essential Oils

FOODBORNE PATHOGENS AND DISEASE, 15(6), 332–338.

By: J. Patel *, S. Keelara n & J. Green *

author keywords: fresh herbs; Salmonella; E; coli O157:H7; antimicrobial
MeSH headings : Acrolein / analogs & derivatives; Acrolein / pharmacology; Anti-Infective Agents / pharmacology; Chlorine / pharmacology; Cymenes; Escherichia coli O157 / drug effects; Food Microbiology; Monoterpenes / pharmacology; Oils, Volatile / pharmacology; Plant Oils / pharmacology; Plants / microbiology; Salmonella / drug effects
TL;DR: Results indicate that 0.3% cinnamaldehyde and 0.1% carvacrol are effective against E. coli O157:H7 and Salmonella, retain color attributes of fresh herbs, and, therefore, may be an alternative wash treatment for fresh herbs. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Biofilm Formation by Environmental Isolates of Salmonella and Their Sensitivity to Natural Antimicrobials

FOODBORNE PATHOGENS AND DISEASE, 13(9), 509–516.

By: S. Keelara n, S. Thakur n  & J. Patel *

MeSH headings : Acrolein / analogs & derivatives; Acrolein / pharmacology; Animals; Anti-Bacterial Agents / pharmacology; Biofilms / drug effects; Biofilms / growth & development; Environmental Microbiology; Microbial Sensitivity Tests; Microscopy, Electron, Scanning; North Carolina; Oils, Volatile / pharmacology; Salmonella enterica / classification; Salmonella enterica / isolation & purification; Salmonella enterica / physiology; Swine / microbiology
TL;DR: Cinnamaldehyde and sporran at 1000 ppm significantly reduced Salmonella in biofilms and the bactericidal effect of these antimicrobials increased with their concentrations. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2014 journal article

A Chicken Embryo Lethality Assay for Pathogenic Enterococcus cecorum

AVIAN DISEASES, 58(2), 244–248.

By: L. Borst* , M. Suyemoto, S. Keelara, S. Dunningan, J. Guy*  & H. Barnes

author keywords: broiler; chicken; Enterococcus cecorum; enterococcal spondylitis; chicken embryo lethality assay
MeSH headings : Animals; Chick Embryo; Chickens; Electrophoresis, Gel, Pulsed-Field / veterinary; Enterococcus / genetics; Enterococcus / isolation & purification; Enterococcus / pathogenicity; Enterococcus / physiology; Gram-Positive Bacterial Infections / diagnosis; Gram-Positive Bacterial Infections / epidemiology; Gram-Positive Bacterial Infections / microbiology; Gram-Positive Bacterial Infections / veterinary; Phylogeny; Poultry Diseases / diagnosis; Poultry Diseases / epidemiology; Poultry Diseases / microbiology; United States; Virulence
TL;DR: This embryo lethality assay provides a useful tool for understanding the genetic basis of E. cecorum virulence and causes outbreaks of arthritis and osteomyelitis in chickens worldwide. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2014 journal article

Dissemination of plasmid-encoded AmpC beta-lactamases in antimicrobial resistant Salmonella serotypes originating from humans, pigs and the swine environment

VETERINARY MICROBIOLOGY, 173(1-2), 76–83.

By: S. Keelara n & S. Thakur n 

author keywords: Salmonella; Plasmids; Antimicrobial resistance and pigs; Conjugation
MeSH headings : Animals; Anti-Bacterial Agents / pharmacology; Bacterial Proteins / genetics; Bacterial Proteins / isolation & purification; Bacterial Typing Techniques; Blotting, Southern; Conjugation, Genetic; Humans; Microbial Sensitivity Tests; North Carolina / epidemiology; Plasmids; Polymerase Chain Reaction; Replicon; Salmonella / drug effects; Salmonella / enzymology; Salmonella / genetics; Salmonella Infections, Animal / drug therapy; Salmonella Infections, Animal / epidemiology; Salmonella Infections, Animal / microbiology; Salmonella Infections, Animal / transmission; Soil Microbiology; Swine / microbiology; Water Microbiology; beta-Lactamases / genetics; beta-Lactamases / isolation & purification
TL;DR: It is demonstrated likely horizontal inter-serovar exchange of plasmid-encoding AmpC β-lactamases resistance among MDR Salmonella serotypes isolated from pigs, swine farm environment and clinical human cases. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 journal article

Longitudinal Study of Distributions of Similar Antimicrobial-Resistant Salmonella Serovars in Pigs and Their Environment in Two Distinct Swine Production Systems

Applied and Environmental Microbiology, 79(17), 5167–5178.

By: S. Keelara n, H. Scott *, W. Morrow n, W. Gebreyes*, M. Correa  n, R. Nayak *, R. Stefanova*, S. Thakur n 

MeSH headings : Abattoirs; Animal Husbandry; Animals; Anti-Bacterial Agents / pharmacology; Drug Resistance, Bacterial; Environmental Microbiology; Food Industry; Genotype; Longitudinal Studies; Meat / microbiology; Salmonella Infections, Animal / microbiology; Salmonella enterica / classification; Salmonella enterica / drug effects; Salmonella enterica / isolation & purification; Serotyping; Swine; Swine Diseases / microbiology
TL;DR: A low prevalence of Salmonella is reported in both production systems in pigs on farms, while a higher prevalence was detected among the carcasses at slaughter, clearly indicating an exchange of this pathogen between the pigs and their surroundings. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

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