Prevalence and characteristics of Salmonella spp. isolated from commercial layer farms in Korea

Im, Min Chan; Jeong, So Jeong; Kwon, Yong-Kuk; Jeong, Ok-Mi; Kang, Min-Su; Lee, Young Ju

doi:10.3382/ps/pev137

Cited by 59 publications

(48 citation statements)

References 44 publications

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“…In a recent epidemiological study, S. Mbandaka (54.40%, 68/125) was reported as the most prevalent serotype on layer farms followed by S. Typhimurium (11.54%, 15/130) [11,13]. S. Mbandaka has also been reported previously in some other studies from animals, feed, egg shell, and sporadic Salmonella infections of humans [12,14,15]. Therefore, in order to reduce number of Salmonellosis cases due to the consumption of egg, effective methods are needed to control Salmonella in layers.…”

Section: Introductionsupporting

confidence: 60%

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Base study for the establishment of national Salmonella control program in hatching farms and table eggs in Turkey

Diker¹,

Göncüoğlu²,

Şahin³

et al. 2020

Turk J Vet Anim Sci

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Foodborne infections due to Salmonella are still a major concern worldwide. Particularly contaminated egg and egg related products are the primary sources for human salmonellosis. It is necessary to determine the risk factors associated with Salmonella contamination of eggs within the scope of farm to table and environment. The objective of this study was to develop the "National Salmonella Control Program in Laying Hens" and report the prevalence and serotype distribution findings of Salmonella in laying hens and eggs in Turkey. A total of 2122 samples were collected and analysed according to ISO 6579:2002 after the isolation and identification procedures. All Salmonella isolates were serotyped including 726 eggs and 1396 farm specimens from 241 epidemiological units (EpUs) that were located in 9 different provinces between 2015 and 2017. Salmonella contamination was detected in 14.9% of 241 EpUs. The results indicated that almost half of the flocks have multiple contamination sources. The highest contamination rate was obtained from environmental (11%) followed by faeces (7.5%) and the lowest was from water samples (1.6%). The overall contamination rate was detected as 7.46% for farms and 3.3% for eggs. As S. Enteritidis and S. Typhimurium are the most frequently seen serotypes all over the world, in Turkey S. Typhimurium was not detected and S. Enteritidis was the 5th most common isolated serotype. According to our results it can be concluded that differences in various countries, particularly geographical and egg hatching systems, may affect the contamination rate and serotype distribution of Salmonella.

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Section: Introductionsupporting

confidence: 60%

“…Contamination with multiple serotypes of Salmonella on commercial layer farms is a common issue [11,12]. In a recent epidemiological study, S. Mbandaka (54.40%, 68/125) was reported as the most prevalent serotype on layer farms followed by S. Typhimurium (11.54%, 15/130) [11,13].…”

Section: Introductionmentioning

confidence: 99%

Base study for the establishment of national Salmonella control program in hatching farms and table eggs in Turkey

Diker¹,

Göncüoğlu²,

Şahin³

et al. 2020

Turk J Vet Anim Sci

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“…Typhimurium is most common serotypes in poultry slaughter houses [4, 38], and the most frequently observed Salmonella serovars in the layer farms were S . Bareilly [20]. …”

Section: Discussionmentioning

confidence: 99%

Molecular characterization of antimicrobial resistant non-typhoidal Salmonella from poultry industries in Korea

Kim

Lee

2017

Ir Vet J

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BackgroundAntimicrobial resistant Salmonella strains are a direct threat to human health when this resistance interferes with treatment and an indirect threat when resistance can be transferred to other human pathogens. The objective of the present study was to characterize antimicrobial resistant non-typhoidal Salmonella (NTS) isolates recovered from poultry industries, including a description of genetic diversity and virulence profiles.ResultsIn total of 93 Salmonella isolates shown antimicrobial resistance to one or more drugs, all isolates exhibited common resistance to streptomycin, nalidixic acid and cephalothin but no ciprofloxacin resistance. Among 26 virulence gene profiling, 12 virulence genes, invA, orgA, prgH, sopB, tolC, sipB, gatC, msgA, pagC, spiA, sifA, and sitC were found in all antimicrobial-resistant NTS isolates. In comparing the data from ERIC-PCR clusters, virulence profiles and resistance profiles, some Salmonella isolates grouped into the same cluster were found to exhibit similar virulence and resistance patterns.ConclusionsVirulence profiling combined with ERIC-PCR offered a rapid approach to characterize antimicrobial-resistant NTS.

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“…Feces and dust, which are widely distributed throughout laying houses, sometimes remain contaminated with S . Enteritidis for many months (35). The ability of S .…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2017

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Human infections with Salmonella Enteritidis are often attributed to the consumption of contaminated eggs, so the prevalence of this pathogen in egg-laying poultry is an important public health risk factor. Numerous and complex environmental influences on Salmonella persistence and transmission are exerted by management practices and housing facilities used in commercial egg production. In recent years, the animal welfare implications of poultry housing systems have guided the development of alternatives to traditional cage-based housing, but their food safety consequences are not yet fully understood. The present study assessed the effects of different bird stocking densities on the frequency and duration of fecal shedding of S. Enteritidis in groups of experimentally infected laying hens housed in colony cages enriched with perching and nesting areas. In two trials, groups of laying hens were distributed at two stocking densities (648 and 973 cm2/bird) into enriched colony cages and (along with a group housed in conventional cages at 648 cm2/bird) orally inoculated with doses of 1.0 × 108 cfu of S. Enteritidis. At 10 weekly postinoculation intervals, samples of voided feces were collected from beneath each cage and cultured to detect S. Enteritidis. Fecal shedding of S. Enteritidis was detected for up to 10 weeks postinoculation by hens in all three housing treatment groups. The overall frequency of positive fecal cultures was significantly (P < 0.05) greater from conventional cages than from enriched colony cages (at the lower stocking density) for the total of all sampling dates (45.0 vs. 33.3%) and also for samples collected at 4–9 weeks postinfection. Likewise, the frequency of S. Enteritidis isolation from feces from conventional cages was significantly greater than from enriched colony cages (at the higher hen stocking density) for the sum of all samples (45.0 vs. 36.7%) and at 6 weeks postinoculation. Moreover, the frequency of S. Enteritidis fecal recovery from enriched colony cages at the higher hen stocking was significantly greater than from similar cages at the lower stocking density for all 10 sampling dates combined (39.4 vs. 33.3%). These results suggest that stocking density can affect S. Enteritidis intestinal colonization and fecal shedding in laying hens, but some other difference between conventional and enriched colony cage systems appears to exert an additional influence.

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Prevalence and characteristics of Salmonella spp. isolated from commercial layer farms in Korea

Cited by 59 publications

References 44 publications

Base study for the establishment of national Salmonella control program in hatching farms and table eggs in Turkey

Base study for the establishment of national Salmonella control program in hatching farms and table eggs in Turkey

Molecular characterization of antimicrobial resistant non-typhoidal Salmonella from poultry industries in Korea

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

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