A multi-state outbreak of Salmonella serotype Thompson infection from commercially distributed bread contaminated by an ill food handler

Kimura, Akiko; Palumbo, Mary S.; Meyers, Hildy; Abbott, Sharon L.; Rodriguez, R.; Werner, S. Benson

doi:10.1017/s0950268805004127

Cited by 50 publications

(36 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The level of resistance of Salmonellae to antibiotics should be alarming to the food processing, distribution and handling of food product [18,19]. Therefore, it is necessary to inform people involved in the food industry as well as distributors to take care in handling the food products.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Antibiotic Resistant Salmonella spp Isolated from Chicken Eggs of Dhaka City

et al. 2010

View full text Add to dashboard Cite

In present study, the occurrence of Salmonella in local chicken eggs and their pattern of antibiotic resistance were determined. 100 egg samples collected from different locations of Dhaka city were analysed and Salmonella spp were found in 8% of the samples. Among all presumptive Salmonella isolates, 8 isolates were confirmed as Salmonella enterica subsp. salamae (4%), Salmonella enterica subsp. indica (1%), Salmonella Paratyphi-A (1%), Salmonella bongori (1%) and Salmonella Choleraesuis (1%) on the basis of serotyping and biochemical analysis. These isolates were subjected to susceptibility test against 10 antibiotic disks. All the isolates were found chloramphenicol sensitive. The highest percentage of resistance (87.5%) was found to amoxicillin and ampicillin. Resistance against erythromycin, cephalexin, doxycycline hydrochloride, ceftazidime, doxycycline and nalidixic acid was also found significant ranging from 25% to 62.5%. Salmonella isolated from egg shell surface were found more antibiotic resistant than that of egg yolk and white. The present study suggests that poultry eggs are potential reservoir of antibiotic resistant Salmonellae.Keywords: Egg; Salmonella; Characterization; Antibiotic resistance.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i1.6109 J. Sci. Res. 3 (1), 191-196 (2011)

show abstract

Section: Resultsmentioning

confidence: 99%

Characterization of Antibiotic Resistant Salmonella spp Isolated from Chicken Eggs of Dhaka City

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Details of outbreaks associated with S. Thompson have been published previously (1)(2)(3)(4). One outbreak which occurred in 2012 involved 1,149 confirmed cases in the Netherlands, which was attributed to the consumption of smoked salmon (1).…”

Section: Introductionmentioning

confidence: 99%

“…One outbreak which occurred in 2012 involved 1,149 confirmed cases in the Netherlands, which was attributed to the consumption of smoked salmon (1). Other studies have identified various vehicles: bread, possibly contaminated by a food handler (2); fresh cilantro (3); and rucola grown in Italy (4). In Canada, two national outbreaks have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Salmonella Thompson outbreak associated with consumption of chicken shawarma and the usefulness of genome sequencing in the investigation

Gaulin

Fiset

Duchesne

et al. 2017

Canada Communicable Disease Report

View full text Add to dashboard Cite

show abstract

“…Most cases of Salmonella enterocolitis are food-borne. Contaminated eggs and poultry are common sources of infection, but outbreaks have also been triggered by meat, fruit, nuts and even bread (4,5). Approximately 15% of cases involve other routes of transmission, including contaminated water, direct person-to-person contact, and laboratory-acquired infections.…”

mentioning

confidence: 99%

Laboratory-Acquired Infection with Salmonella enterica Serovar Typhimurium Exposed by Whole-Genome Sequencing

et al. 2016

View full text Add to dashboard Cite

Despite advances in laboratory design, professional training, and workplace biosafety guidelines, laboratory-acquired infections continue to occur. Effective tools are required to investigate cases and prevent future illness. Here, we demonstrate the value of whole-genome sequencing as a tool for the identification and source attribution of laboratory-acquired salmonellosis. Salmonella is a leading cause of bacterial gastroenteritis, with an estimated global incidence of 93.8 million cases per year, including 155,000 deaths from diarrheal disease and 690,000 deaths from invasive disease (1, 2). Illness due to nontyphoidal Salmonella strains is usually self-limiting, but symptoms can be severe. Invasive disease is less common but more frequently fatal (3). Most cases of Salmonella enterocolitis are food-borne. Contaminated eggs and poultry are common sources of infection, but outbreaks have also been triggered by meat, fruit, nuts and even bread (4,5). Approximately 15% of cases involve other routes of transmission, including contaminated water, direct person-to-person contact, and laboratory-acquired infections.The Saskatchewan Disease Control Laboratory (SDCL) is a public health laboratory that provides clinical diagnostic and microbiology services to the people of Saskatchewan, Canada. In 2011, a medical laboratory technologist from the SDCL became ill with enterocolitis. Salmonella enterica serovar Typhimurium was isolated and, although there was no record of a laboratory accident, occupational exposure was investigated as a possible source of illness. By pulsed-field gel electrophoresis (PFGE), the technologist's isolate was indistinguishable from ATCC 14028, a commercially available strain of S. enterica serovar Typhimurium that is widely employed in clinical and educational settings. At the SDCL, a derivative of ATCC 14028, called SDCL 14028, is used for routine laboratory procedures, including quality control of Salmonella antisera and culture media. By PFGE, the XbaI profiles of SDCL 14028 and ATCC 14028 are identical. However, SDCL 14028 has a distinct BlnI profile (Fig. 1). Because in vitro passaging can result in mutations, archived aliquots of SDCL 14028 and a new aliquot purchased from the original supplier (Cedarlane, Ontario, Canada) were examined. All aliquots had the same variant BlnI profile (data not shown), indicating that the altered PFGE pattern was not an artifact of laboratory passaging. For SDCL 14028 to be the source of the technologist's infection, the strain would have had to revert to the wild type during the course of the clinical illness. Although theoretically possible, this was considered highly unlikely. As such, the initial investigation concluded that the infection was not acquired from a laboratory, and its source remained unknown.We have now revisited this case using a whole-genome sequencing approach. A review of the SDCL strain archive uncovered four clinical isolates (STM-A to STM-D) of S. enterica serovar Typhimurium with ATCC 14028-like PFGE profiles (Table 1). STM-A is...

show abstract

A multi-state outbreak of Salmonella serotype Thompson infection from commercially distributed bread contaminated by an ill food handler

Cited by 50 publications

References 14 publications

Characterization of Antibiotic Resistant <i>Salmonella spp</i> Isolated from Chicken Eggs of Dhaka City

Characterization of Antibiotic Resistant <i>Salmonella spp</i> Isolated from Chicken Eggs of Dhaka City

Salmonella Thompson outbreak associated with consumption of chicken shawarma and the usefulness of genome sequencing in the investigation

Laboratory-Acquired Infection with Salmonella enterica Serovar Typhimurium Exposed by Whole-Genome Sequencing

Contact Info

Product

Resources

About