The prevalence and dynamics of Salmonella enterica IIIb 61:k:1,5,(7) in sheep flocks in Norway

Sandberg, Marianne; Alvseike, Ole; Skjerve, Eystein

doi:10.1016/s0167-5877(01)00250-1

Cited by 26 publications

(43 citation statements)

References 11 publications

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“…was quite high in this study (26.9%) and widely distributed (72.1% of operations), nearly all of the isolates (94.0%) were Salmonella enterica serotype IIIb 61:-:1,5,7, a serotype rarely associated with disease in people (Weiss et al, 1986). That the majority of isolates were S. enterica serotype IIIb 61:-:1,5,7 is consistent with previous findings in sheep in Canada, the United States, and Europe (Harp et al, 1981;Pritchard, 1990;Sandburg, 2002;Bonke et al, 2012). It is considered to be host adapted in sheep and rarely causes disease in otherwise healthy sheep (Greenfield, 1973).…”

Section: Discussionsupporting

confidence: 89%

SalmonellaPrevalence and Antimicrobial Susceptibility from the National Animal Health Monitoring System Sheep 2011 Study

Dargatz

Marshall

Fedorka–Cray

et al. 2015

Foodborne Pathogens and Disease

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Salmonella is a major cause of foodborne illness and can cause clinical disease in animals. Understanding the on-farm ecology of Salmonella will be helpful in decreasing the risk of foodborne transmission. An objective of this study was to determine the prevalence of Salmonella among fecal samples collected on sheep operations in the United States. Another objective was to compare the use of composite fecal samples with fecal samples collected from individual sheep as a tool for screening sheep flocks for Salmonella. Sheep fecal samples (individual and composite) were collected on operations in 22 states. Salmonella isolates were characterized with regard to species, serotype, and antimicrobial susceptibility profile. Most operations (72.1%) had at least one positive sample and overall 26.9% of samples were positive. The percentage of positive samples varied by animal age class. Composite and individual samples gave similar results. The majority of the isolates (94%) were Salmonella enterica subspecies diarizonae serotype 61:-:1,5,7. Nearly all of the isolates (91.2%) tested for antimicrobial susceptibility were susceptible to all antimicrobials in the panel. The findings suggest that salmonellae typically associated with foodborne disease transmission are infrequently found on sheep operations in the United States.

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Section: Discussionsupporting

confidence: 89%

SalmonellaPrevalence and Antimicrobial Susceptibility from the National Animal Health Monitoring System Sheep 2011 Study

Dargatz

Marshall

Fedorka–Cray

et al. 2015

Foodborne Pathogens and Disease

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“…Salmonellae were isolated exclusively in October, and one fecal sample tested positive for both pathogens. The presence of Salmonella and E. coli O157:H7 in the Virginia herds was expected, as previous surveys conducted at different locations yielded similar results (1,13,20,22,23). Additional studies, with considerations for age, breed, and location, etc., are needed to de- termine if the high prevalence of Salmonella found in October is a significant trend in Virginia herds.…”

supporting

confidence: 64%

Detection ofSalmonellaStrains andEscherichia coliO157:H7 in Feces of Small Ruminants and Their Isolation with Various Media

Pao

Patel

Kalantari

et al. 2005

Appl Environ Microbiol

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Salmonella strains and Escherichia coli O157:H7 were detected in 17 and 5 small ruminants in Virginia, respectively, of 287 tested. Background microflora interfered with the fecal analysis. The combination of Salmonella enzyme immunoassay (EIA) detection and xylose-lysine-deoxycholate agar isolation was satisfactory. Modifying enrichment to a 1:100 dilution enabled effective E. coli O157:H7 detection by EIA and isolation by sorbitol-MacConkey agar with cefixime-tellurite.Direct plating using selective media was found to be successful in detecting and isolating Salmonella strains and Escherichia coli O157:H7 from stools of diseased humans (8,15,18). However, an enrichment step was necessary for enhancing the detection and isolation of target pathogens when healthy cattle with possibly low levels of shedding were being evaluated (5,6,7,9,17,24). For rapid detection, enzyme immunoassays (EIA) and immunomagnetic separation systems were developed to screen bovine fecal samples before pathogen isolation by plating enriched samples (4, 30). Comments on the methods for detection and isolation of pathogens in animal feces are available (4,16,19,24,27). stated that previous cattle studies may have missed fecal pathogens and misclassified herds as negative due to the use of limitedsensitivity culture methods. Oberst et al. (19) found that current methods for recovering and identifying E. coli O157:H7 from cattle feces are inconsistent and are hindered by their inability to specifically and rapidly detect small numbers of organisms from the complex and variable matrix. Moreover, Tutenel et al. (27) suggested performing more than one E. coli O157 test on fecal samples to avoid underestimating the incidence of E. coli O157 in cattle.Small ruminants, such as sheep and goats, are potential carriers of Salmonella and E. coli O157:H7 (1,11,14,29). Although a difference between the survivals of E. coli O157:H7 bacteria in ovine and bovine manure was noted (13), specific information on the sensitivities of EIA and common plate assays for detecting and isolating these pathogens in feces of small ruminants is limited. The objectives of this study were to screen for the presence of Salmonella and E. coli O157:H7 in the feces of small ruminants by validated EIA protocols for foods and to evaluate the sensitivities of common selective agars for pathogen isolation (8,15,18,21,24).(An abstract of this study was presented at the Ninth Biennial Symposium on Minorities, the Medically Underserved & Cancer in Washington, D.C., in March 2004.) Sample collection. For the microbiological survey, feces were collected from grazing sheep and goats. The animals (with ages ranging from young to mature) were predominately meat breeds raised under forage-based systems with limited concentrate supplementation. For the inoculation study, feces were collected from 20 healthy male sheep at the Virginia State University research farm. The 20 sheep were of breeding age and were provided with high-quality alfalfa hay daily. In all experiments, fecal sample...

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“…SED 61:k:1, 5, (7), and no other Salmonella species, has been isolated from rectal swabs of Norwegian sheep, but there was no indication of any pathology associated with these organisms (Alvseike and Skerve, 2002;Sanberg et al, 2002). A high rate of isolation of S. diarizonae from sheep tonsils at slaughter has been reported in Switzerland (Bonke et al, 2012).…”

mentioning

confidence: 99%

Chronic Proliferative Rhinitis associated with Salmonella enterica subspecies diarizonae serovar 61:k:1, 5, (7) in Sheep in Spain

Lacasta

Ferrer

Ramos

et al. 2012

Journal of Comparative Pathology

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The prevalence and dynamics of Salmonella enterica IIIb 61:k:1,5,(7) in sheep flocks in Norway

Cited by 26 publications

References 11 publications

SalmonellaPrevalence and Antimicrobial Susceptibility from the National Animal Health Monitoring System Sheep 2011 Study

SalmonellaPrevalence and Antimicrobial Susceptibility from the National Animal Health Monitoring System Sheep 2011 Study

Detection ofSalmonellaStrains andEscherichia coliO157:H7 in Feces of Small Ruminants and Their Isolation with Various Media

Chronic Proliferative Rhinitis associated with Salmonella enterica subspecies diarizonae serovar 61:k:1, 5, (7) in Sheep in Spain

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