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Author Jean Guard

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The occurrence of Salmonella, extended-spectrum β-lactamase producing Escherichia coli and carbapenem resistant non-fermenting Gram-negative bacteria in a backyard poultry flock environment.

Devendra H Shah, Melissa M Board, Rocio Crespo, Jean Guard, Narayan C Paul, Cynthia Faux,

Increase in the number of small-scale backyard poultry flocks in the USA has substantially increased human-to-live poultry contact, leading to increased public health risks of the transmission of multi-drug resistant (MDR) zoonotic and food-borne bacteria. The objective of this study was to detect the occurrence of Salmonella and MDR Gram-negative ... Read more >>

Zoonoses Public Health (Zoonoses and public health)
[2020, :]

Cited: 0 times

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Low Dose Infection of Hens in Lay with Salmonella enterica Serovar Enteritidis from Different Genomic Clades.

Jean Guard, Michael Rothrock, Deana Jones, Richard Gast,

Salmonella enterica serovar Enteritidis is the leading cause of salmonellosis in people, and modeling of infections in chickens is used to identify intervention strategies. A review of 80 manuscripts encompassing 119 experiments indicated that the mean dose of infection was 108 CFU per bird. Experiments of less than 106 CFU ... Read more >>

Avian Dis. (Avian diseases)
[2020, 64(1):7-15]

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A Microbiomic Analysis of a Pasture-Raised Broiler Flock Elucidates Foodborne Pathogen Ecology Along the Farm-To-Fork Continuum.

Michael J Rothrock, Aude Locatelli, Kristina M Feye, Andrew J Caudill, Jean Guard, Kelli Hiett, Steven C Ricke,

While conventionally grown poultry continues to dominate the U. S. poultry industry, there is an increasing demand for locally-grown, "all natural" alternatives. The use of next generation sequencing allows for not only the gross (e.g., community structure) but also fine-scale (e.g., taxa abundances) examination of these complex microbial communities. This ... Read more >>

(Frontiers in veterinary science)
[2019, 6:260]

Cited: 2 times

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Genome sequence analysis of 91 Salmonella Enteritidis isolates from mice caught on poultry farms in the mid 1990s.

Jean Guard, Guojie Cao, Yan Luo, Joseph D Baugher, Sherrill Davison, Kuan Yao, Maria Hoffmann, Guodong Zhang, Nathan Likens, Rebecca L Bell, Jie Zheng, Eric Brown, Marc Allard,

A total of 91 draft genome sequences were used to analyze isolates of Salmonella enterica serovar Enteritidis obtained from feral mice caught on poultry farms in Pennsylvania. One objective was to find mutations disrupting open reading frames (ORFs) and another was to determine if ORF-disruptive mutations were present in isolates ... Read more >>

Genomics (Genomics)
[2020, 112(1):528-544]

Cited: 2 times

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Genomic organization and role of SPI-13 in nutritional fitness of Salmonella.

Jacob R Elder, Narayan C Paul, Raquel Burin, Jean Guard, Devendra H Shah,

Salmonella pathogenicity island 13 (SPI-13) contributes to the virulence of Salmonella. The majority of the SPI-13 genes encode proteins putatively involved in bacterial metabolism, however, their functions largely remain uncharacterized. It is currently unknown if SPI-13 contributes to metabolic fitness of Salmonella and, if so, what are the metabolic substrates ... Read more >>

Int. J. Med. Microbiol. (International journal of medical microbiology : IJMM)
[2018, 308(8):1043-1052]

Cited: 1 time

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Multiplication in Egg Yolk and Survival in Egg Albumen of Genetically and Phenotypically Characterized Salmonella Enteritidis Strains.

Richard K Gast, Jean Guard, Rupa Guraya, Aude Locatelli,

Prompt refrigeration of eggs to prevent the multiplication of Salmonella Enteritidis to high levels during storage is an important practice for reducing the risk of egg-transmitted human illness. The efficacy of egg refrigeration for achieving this goal depends on the interaction among the location of contamination, the ability of contaminant ... Read more >>

J. Food Prot. (Journal of food protection)
[2018, 81(6):876-880]

Cited: 2 times

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Whole genome sequence analysis of 91 Salmonella Enteritidis isolates from mice caught on poultry farms in the mid 1990s

Jean Guard, Guojie Cao, Yan Luo, Joseph Baugher, Sherrill Davison, Kuan Yao, Maria Hoffmann, Guodong Zhang, Rebecca Bell, Jie Zheng, Eric Brown, Marc Allard,

Abstract Salmonella enterica serovar Enteritidis (SE), the most commonly reported serovar of human salmonellosis, has been frequently associated with poultry farms, eggs and egg products. Mice are known vectors of SE contamination in these facilities. The objective of this study was to use whole-genome sequencing (WGS) to analyze SE from ... Read more >>

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Complete Genome Sequence of a Ciprofloxacin-Resistant Salmonella enterica subsp. enterica Serovar Kentucky Sequence Type 198 Strain, PU131, Isolated from a Human Patient in Washington State.

Devendra H Shah, Narayan C Paul, Jean Guard,

Strains of the ciprofloxacin-resistant (Cipr) Salmonella enterica subsp. enterica serovar Kentucky sequence type 198 (ST198) have rapidly and extensively disseminated globally to become a major food safety and public health concern. Here, we report the complete genome sequence of a CiprS. Kentucky ST198 strain, PU131, isolated from a human patient ... Read more >>

(Genome announcements)
[2018, 6(9):]

Cited: 1 time

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Serotyping of Salmonella Enterica Isolated from Mice Caught on US Poultry Farms 1995 through 1998.

Jean Guard, David J Henzler, Hazem Ramadan, Deana R Jones, Richard K Gast, Sherrill Davison, Marc W Allard,

In this study, a collection of Salmonella enterica subspecies obtained from live mice caught on 32 poultry farms in the Northeast US between 1995 to 1998 was evaluated to provide a historical reference for serotype distribution during a time when egg contamination by serotype Enteritidis was at its peak. Of ... Read more >>

(Food safety (Tokyo, Japan))
[2018, 6(1):44-50]

Cited: 0 times

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Simultaneous Detection of Multiple Salmonella Serovars from Milk and Chicken Meat by Real-Time PCR Using Unique Genomic Target Regions.

Sayma Afroj, Khaled Aldahami, Gopal Reddy, Jean Guard, Abiodun Adesiyun, Temesgen Samuel, Woubit Abdela,

A novel genomic and plasmid target-based PCR platform was developed for the detection of Salmonella serovars Heidelberg, Dublin, Hadar, Kentucky, and Enteritidis. Unique genome loci were obtained through extensive genome mining of protein databases and comparative genomic analysis of these serovars. Assays targeting Salmonella serovars Hadar, Heidelberg, Kentucky, and Dublin ... Read more >>

J. Food Prot. (Journal of food protection)
[2017, :1944-1957]

Cited: 2 times

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Draft Genome Sequences of 64 Salmonella enterica Serotype Enteritidis Isolates Obtained from Wild Mice.

Jean Guard, Guojie Cao, George J Kastanis, Sherrill Davison, Michael McClelland, Maria Sanchez Leon, Jie Zheng, Eric Brown, Marc W Allard,

Salmonella enterica serotype Enteritidis is a foodborne pathogen of global concern, because it is frequently isolated from foods and patients. Draft genome sequences are reported here for 64 S Enteritidis strains isolated from the intestines and spleens of mice caught live on chicken farms in the U.S. Northeast. The availability of ... Read more >>

(Genome announcements)
[2017, 5(36):]

Cited: 3 times

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Frequency and Duration of Fecal Shedding of Salmonella Serovars Heidelberg and Typhimurium by Experimentally Infected Laying Hens Housed in Enriched Colony Cages at Different Stocking Densities.

Richard K Gast, Rupa Guraya, Deana R Jones, Jean Guard, Kenneth E Anderson, Darrin M Karcher,

Eggs contaminated with Salmonella Enteritidis are leading sources of human salmonellosis, but Salmonella Heidelberg and Salmonella Typhimurium are also egg-associated pathogens. The management practices and housing facilities characterizing different systems for housing commercial egg flocks can influence Salmonella persistence and transmission. Animal welfare aspects of poultry housing have been widely ... Read more >>

Avian Dis. (Avian diseases)
[2017, 61(3):366-371]

Cited: 2 times

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Colonization of internal organs by Salmonella serovars Heidelberg and Typhimurium in experimentally infected laying hens housed in enriched colony cages at different stocking densities.

Richard K Gast, Rupa Guraya, Deana R Jones, Jean Guard, Kenneth E Anderson, Darrin M Karcher,

Contaminated eggs produced by infected commercial laying flocks are often implicated as sources of human infections with Salmonella Enteritidis, but Salmonella serovars Heidelberg and Typhimurium have also been associated with egg-transmitted illness. Contamination of the edible contents of eggs is a consequence of the colonization of reproductive tissues in systemically ... Read more >>

Poult. Sci. (Poultry science)
[2017, 96(5):1402-1409]

Cited: 2 times

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Population dynamics and antimicrobial resistance of the most prevalent poultry-associated Salmonella serotypes.

Devendra H Shah, Narayan C Paul, Willium C Sischo, Rocio Crespo, Jean Guard,

Salmonella spp. is the most predominant bacterial cause of foodborne gastroenteritis in humans. Due to the risk of human infection associated with poultry products and the prevalence of antimicrobial resistance, Salmonella also poses a significant challenge to commercial poultry production. During the last decade (2002 to 2012), the 12 most ... Read more >>

Poult. Sci. (Poultry science)
[2017, 96(3):687-702]

Cited: 21 times

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Genome Sequences of Two Salmonella enterica Serovar Kentucky Isolates Recovered from Poultry Carcasses in the United States.

Bradd J Haley, Seon Woo Kim, Karen Liljebjelke, Jean Guard, Jo Ann S Van Kessel,

We report here the draft genome sequences of two Salmonella enterica serovar Kentucky eBurstGroup 15 isolates collected from poultry carcasses in Georgia (USA). ... Read more >>

(Genome announcements)
[2016, 4(6):]

Cited: 1 time

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Metabolic parameters linked by phenotype microarray to acid resistance profiles of poultry-associated Salmonella enterica.

Jean Guard, Michael J Rothrock, Devendra H Shah, Deana R Jones, Richard K Gast, Roxana Sanchez-Ingunza, Melissa Madsen, John El-Attrache, Bwalya Lungu,

Phenotype microarrays were analyzed for 51 datasets derived from Salmonella enterica. The top 4 serotypes associated with poultry products and one associated with turkey, respectively Typhimurium, Enteritidis, Heidelberg, Infantis and Senftenberg, were represented. Datasets were partitioned initially into two clusters based on ranking by values at pH 4.5 (PM10 A03). ... Read more >>

Res. Microbiol. (Research in microbiology)
[2016, 167(9-10):745-756]

Cited: 2 times

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Erratum to: The Salmonella pathogenicity island 13 contributes to pathogenesis in streptomycin pre-treated mice but not in day-old chickens.

Jacob R Elder, Kim Lam Chiok, Narayan C Paul, Gary Haldorson, Jean Guard, Devendra H Shah,

[This corrects the article DOI: 10.1186/s13099-016-0098-0.]. ... Read more >>

(Gut pathogens)
[2016, 8:35]

Cited: 1 time

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The Salmonella pathogenicity island 13 contributes to pathogenesis in streptomycin pre-treated mice but not in day-old chickens.

Jacob R Elder, Kim Lam Chiok, Narayan C Paul, Gary Haldorson, Jean Guard, Devendra H Shah,

BACKGROUND:Salmonella enterica serovar Enteritidis (S. Enteritidis) is a human and animal pathogen that causes gastroenteritis characterized by inflammatory diarrhea and occasionally an invasive systemic infection. Salmonella pathogenicity islands (SPIs) are horizontally acquired genomic segments known to contribute to Salmonella pathogenesis. The objective of the current study was to determine the ... Read more >>

(Gut pathogens)
[2016, 8:16]

Cited: 7 times

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Antibiotic Resistance Patterns of Major Zoonotic Pathogens from All-Natural, Antibiotic-Free, Pasture-Raised Broiler Flocks in the Southeastern United States.

Michael J Rothrock, Kelli L Hiett, Jean Y Guard, Charlene R Jackson,

The use of antibiotics in agroecosystems has been implicated in the rise in antibiotic resistance (AR), which can affect environmental, animal, and human health. To determine the environmental impact of antibiotic use in agroecosystems, appropriate background levels of AR in agricultural environments in the absence of antibiotic application must be ... Read more >>

J. Environ. Qual. (Journal of environmental quality)
[2016, 45(2):593-603]

Cited: 11 times

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Reduction of Salmonella Enteritidis in the spleens of hens by bacterins that vary in fimbrial protein SefD.

Roxana Sanchez-Ingunza, Jean Guard, Cesar A Morales, Alan H Icard,

The objective of this research was to determine whether variation in the presence of fimbrial protein SefD would impact efficacy of bacterins as measured by recovery of Salmonella enterica serovar Enteritidis (Salmonella Enteritidis) from the spleens of hens. Two bacterins were prepared that varied in SefD content. Also, two adjuvants ... Read more >>

Foodborne Pathog. Dis. (Foodborne pathogens and disease)
[2015, 12(10):836-843]

Cited: 2 times

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Recovery of Salmonella enterica serovar Enteritidis from hens initially infected with serovar Kentucky.

Jean Guard, Roxana Sanchez-Ingunza, Devendra H Shah, Michael J Rothrock, Richard K Gast, Deana R Jones,

Salmonella enterica serovars Enteritidis and Kentucky differ greatly in epidemiology. We wanted to know if the non-pathogenic serotype Kentucky impacted the recovery of the pathogen Enteritidis from chickens. To explore this issue, 4 groups of hens were treated as follows: (i) hens were inoculated orally with Kentucky and injected intramuscularly ... Read more >>

Food Chem (Food chemistry)
[2015, 189:86-92]

Cited: 3 times

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The characterization of Salmonella enterica serotypes isolated from the scalder tank water of a commercial poultry processing plant: Recovery of a multidrug-resistant Heidelberg strain.

Michael J Rothrock, Kimberly D Ingram, John Gamble, Jean Guard, Kellie M Cicconi-Hogan, Arthur Hinton, Kelli L Hiett,

The recent multistate outbreak of a multidrug-resistant (MDR) Salmonella Heidelberg strain from commercial poultry production highlights the need to better understand the reservoirs of these zoonotic pathogens within the commercial poultry production and processing environment. As part of a larger study looking at temporal changes in microbial communities within the ... Read more >>

Poult. Sci. (Poultry science)
[2015, 94(3):467-472]

Cited: 11 times

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Integrative analysis of Salmonellosis in Israel reveals association of Salmonella enterica Serovar 9,12:l,v:- with extraintestinal infections, dissemination of endemic S. enterica Serovar Typhimurium DT104 biotypes, and severe underreporting of outbreaks.

Alex Marzel, Prerak T Desai, Israel Nissan, Yosef Ilan Schorr, Jotham Suez, Lea Valinsky, Abraham Reisfeld, Vered Agmon, Jean Guard, Michael McClelland, Galia Rahav, Ohad Gal-Mor,

Salmonella enterica is the leading etiologic agent of bacterial food-borne outbreaks worldwide. This ubiquitous species contains more than 2,600 serovars that may differ in their host specificity, clinical manifestations, and epidemiology. To characterize salmonellosis epidemiology in Israel and to study the association of nontyphoidal Salmonella (NTS) serovars with invasive infections, ... Read more >>

J. Clin. Microbiol. (Journal of clinical microbiology)
[2014, 52(6):2078-2088]

Cited: 6 times

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Serotype and antimicrobial resistance patterns of Salmonella isolates from commercial birds and poultry environment in Mississippi.

Martha Pulido-Landínez, Paul Washington, Jay Kay Thornton, Yi Zhang, Roxana Sánchez-Ingunza, Alejandro Banda, Jean Guard, Vladimir P Nascimento, Danny L Magee, Michael J Mauel,

To obtain information about Salmonella from commercial birds and poultry environments within Mississippi, 50 Salmonella enterica isolates were collected and characterized by intergenic sequence ribotyping (ISR) serotyping and by determining antimicrobial resistance. ISR assigned serotype to all 50 Salmonella enterica isolates whereas the Kauffman-White-LeMinor antibody-based scheme assigned serotype to 48. ... Read more >>

Avian Dis. (Avian diseases)
[2014, 58(1):64-70]

Cited: 3 times

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Presence of Salmonella enteritidis and Salmonella gallinarum in commercial laying hens diagnosed with fowl typhoid disease in Colombia.

Martha Pulido-Landínez, Roxana Sánchez-Ingunza, Jean Guard, Vladimir Pinheiro do Nascimento,

A severe outbreak of salmonellosis in commercial brown table egg layers first occurred in Colombia in 2006. From 2008 to 2012, 35 samples collected from commercial layers farms in the states of Cundinamarca, Santander, Bolivar, and San Andres, were positive for Salmonella enterica. Salmonella was isolated from liver and spleen ... Read more >>

Avian Dis. (Avian diseases)
[2014, 58(1):165-170]

Cited: 6 times

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