Isolation of Salmonella spp from the environment of dairies without any history of clinical salmonellosis

Peek, Simon F.; Hartmann, F; Thomas, Chester B.; Nordlund, Ken

doi:10.2460/javma.2004.225.574

Cited by 24 publications

(15 citation statements)

References 13 publications

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“…10 Peek et al 27 recently reported the isolation of S. Corvallis from the environment of one dairy without any history of clinical salmonellosis. This isolate was also susceptible to all antimicrobial agents tested.…”

Section: Discussionmentioning

confidence: 97%

Molecular Characterization and Occurrence of Extended-Spectrum β-Lactamase Resistance Genes among Salmonella enterica Serovar Corvallis from Thailand, Bulgaria, and Denmark

Archambault

Petrov²,

Hendriksen

et al. 2006

Microbial Drug Resistance

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Fifty nine Salmonella Corvallis isolates from humans and food products in Bulgaria, Denmark, and Thailand were examined for antimicrobial susceptibility and characterized by pulsed-field gel electrophoresis (PFGE). Cephalosporin-resistant isolates were examined for the presence of genes encoding beta-lactamases by PCR and sequencing. Ten different PFGE types were observed. One type (30 isolates) was recovered in all three countries; three types were found only in Bulgaria, two only in Denmark, two only in Thailand, and two both in Denmark and Thailand. Ten isolates were susceptible to all antimicrobial agents tested, whereas 41 were resistant to three or more antimicrobials. Most resistance was observed among the isolates from Bulgaria. Of the 25 isolates from Bulgaria, 20 displayed resistance to ampicillin and the cephalosporins ceftiofur and cephalothin. All 20 isolates tested negative for bla (CMY-1), bla (CMY-2), and bla (ACC), but positive for bla (SHV), of which five were sequenced to bla (SHV-2). Plasmid profiling and hybridization revealed that the bla (SHV) gene was located on plasmids of approximately 70 kb. Five plasmid profiles were found among these 20 isolates. The plasmid profiling confirmed the PFGE-type and was able to further subdivide the strains. Seventeen of these 20 isolates contained also bla (TEM), of which nine representatives were sequenced to bla (TEM-1B), or bla (TEM-1H). One isolate contained bla (CTX-M-15), bla (SHV-2), and bla (TEM-1H), with the bla (CTX-M-15), and bla (TEM-1H) genes located on a 63-kb transferable plasmid. This study showed a high frequency of resistance among S. Corvallis isolated from humans and food products in Bulgaria, with a lower frequency in Thailand and Denmark. The clonal relatedness among the isolates from three countries could indicate a recent spread of this serovar.

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Section: Discussionmentioning

confidence: 97%

Molecular Characterization and Occurrence of Extended-Spectrum β-Lactamase Resistance Genes among Salmonella enterica Serovar Corvallis from Thailand, Bulgaria, and Denmark

Archambault

Petrov²,

Hendriksen

et al. 2006

Microbial Drug Resistance

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“…Salmonella Cerro was also isolated from four dairy herds in Ohio for up to 18 months in the absence of clinical signs; however, three of these herds had experienced clinical outbreaks (diarrhea, abortion, and evidence of endotoxemia) prior to the study period, and Salmonella Cerro was isolated from some of the affected cattle in each instance (Huston et al, 2002a). Salmonella Cerro was isolated from the environment of one Wisconsin dairy farm without a history of salmonellosis, but no cattle were sampled in that study (Peek et al, 2004). The NAHMS Dairy 2007 study, based on a single sampling visit to 121 farms in 17 states, found Salmonella Cerro to be the most common serotype isolated from healthy lactating cows (CEAH, 2009).…”

Section: Figmentioning

confidence: 96%

“…The focus of this study was S. enterica serotype Cerro, an infrequent human pathogen (CDC, 2008) whose role in causing clinical disease in cattle is unclear (Huston et al, 2002a;Peek et al, 2004;Van Kessel et al, 2007). Our objectives were to document the within-herd prevalence of Salmonella Cerro among a sample of dairy herds throughout New York, to describe the antimicrobial resistance patterns and pulsedfield gel electrophoresis (PFGE) types of the Cerro isolates, and to further clarify the status of this serotype as a bovine pathogen.…”

mentioning

confidence: 99%

Salmonella entericaSerotype Cerro Among Dairy Cattle in New York: An Emerging Pathogen?

Cummings

Warnick

Elton

et al. 2010

Foodborne Pathogens and Disease

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“…However, asymptomatic fecal shedding of Salmonella has also been well documented (Anderson et al, 2001;Edrington et al, 2004a;Hume et al, 2004;Huston et al, 2002b;Peek et al, 2004). The effect of subclinical endemic infection in a herd is difficult to determine and such research appears not to have been published, but effects on reproduction and milk production are biologically plausible.…”

Section: Introductionmentioning

confidence: 95%

“…(Callaway et al, 2005;Edrington et al, 2004b;Fitzgerald et al, 2003;Hume et al, 2004;Peek et al, 2004). Outbreaks of Salmonella in dairy herds have typically been shown to move through the cattle rapidly although there have been occasional reports of long-term persistence of infection within animals (Giles et al, 1989;Huston et al, 2002a;Radke et al, 2002) as well as in the dairy facilities and in the surrounding environment (Fossler et al, 2005;Peek et al, 2004).…”

mentioning

confidence: 94%

Longitudinal Study of a Clonal, Subclinical Outbreak ofSalmonella entericasubsp.entericaSerovar Cerro in a U.S. Dairy Herd

Kessel

Karns

Wolfgang

et al. 2007

Foodborne Pathogens and Disease

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Salmonellae are a major group of foodborne pathogens known to affect both humans and animals. Dairy cattle are a known reservoir of these bacteria and human Salmonella infections have been associated with the consumption of improperly processed or contaminated dairy products. Many of the over 2500 known serotypes of Salmonella are known to infect cattle, resulting in asymptomatic to fatal salmonellosis. This study describes the course of a Salmonella outbreak and subsequent endemic infection on a dairy farm in Pennsylvania. The outbreak was initially detected when a few cows with clinical symptoms and one fatality were found to be infected with Salmonella enterica subsp. enterica serovar Typhimurium var. Copenhagan. Based upon sampling of the farm environment, Salmonella Typhimurium var. Copenhagan was succeeded within 3 months by Salmonella enterica subsp. enterica serovar Kentucky. Salmonella enterica subsp. enterica serovar Cerro ultimately supplanted Typhimurium var. Copenhagan and Kentucky in individual animals and environmental samples and persisted in the herd at high prevalence for almost 2 years. Since there were no obvious clinical consequences of the Salmonella Cerro infection, these data suggest that some serotypes of S. enterica subsp. enterica can behave as commensal organisms in dairy cattle and illustrate the difficulties of controlling Salmonella in milk production systems. The consistent finding of Salmonella in the environment reinforces the potential for human exposure to this pathogen and the need to understand the dynamics and ecology of Salmonella in dairy production settings.

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Isolation of Salmonella spp from the environment of dairies without any history of clinical salmonellosis

Abstract: Environmental Salmonella contamination was demonstrated on free stall dairies with no history of clinical salmonellosis.

Cited by 24 publications

References 13 publications

Molecular Characterization and Occurrence of Extended-Spectrum β-Lactamase Resistance Genes among Salmonella enterica Serovar Corvallis from Thailand, Bulgaria, and Denmark

Molecular Characterization and Occurrence of Extended-Spectrum β-Lactamase Resistance Genes among Salmonella enterica Serovar Corvallis from Thailand, Bulgaria, and Denmark

Salmonella entericaSerotype Cerro Among Dairy Cattle in New York: An Emerging Pathogen?

Longitudinal Study of a Clonal, Subclinical Outbreak ofSalmonella entericasubsp.entericaSerovar Cerro in a U.S. Dairy Herd

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