Salmonella enterica: isolamento e soroprevalência em suínos abatidos no Rio Grande do Sul

Schwarz, Patrícia; Calveira, J.; Sella, Alessandra B.; Bessa, Marjô Cadó; Barcellos, David Emílio Santos Neves de; Cardoso, Marisa Ribeiro de Itapema

doi:10.1590/s0102-09352009000500003

Cited by 15 publications

(14 citation statements)

References 23 publications

(3 reference statements)

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“…Typhimurium has been frequently isolated from swine (Michael et al, 2002;Oliveira et al, 2005). Consistent with this study, Schwarz et al (2009) isolated the serotypes S. Panama and S. Typhimurium from the mesenteric lymph nodes of swine slaughtered in the state of Rio Grande do Sul, Brazil.…”

Section: Wild Birdssupporting

confidence: 86%

“…(Mutalib et al, 1992). There are also studies reporting the frequent presence of wild birds in poultry (Sousa et al, 2010a;Sousa et al, 2010b;Carrasco et al, 2011) and of other farm animals, such as pigs (Michael et al, 2002;Schwarz et al, 2009). Other animals are commonly found on the same farm, including synanthropic animals such as rodents (Hilton et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental infection of one-day-old chicks with Salmonella Serotypes Previously isolated from poultry facilities, wild birds, and swine

Sousa

Werther

Berchieri

et al. 2013

Rev. Bras. Cienc. Avic.

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Section: Wild Birdssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Experimental infection of one-day-old chicks with Salmonella Serotypes Previously isolated from poultry facilities, wild birds, and swine

Sousa

Werther

Berchieri

et al. 2013

Rev. Bras. Cienc. Avic.

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“…The predominance of these serovars was consistent with previous studies, which also found Salmonella serogroup O:4 (B) to be the most prevalent in Brazilian swine herds (SCHWARZ et al, 2009;KICH et al, 2011). Therefore, it was expected that the ELISA-Typhimurium would be able to detect antibodies in most of the positive herds, if the infection occurred before the period needed for seroconversion.…”

Section: Resultssupporting

confidence: 89%

“…Salmonella infection in swine herds has been demonstrated in Brazil (SCHWARZ et al, 2009), and a relatively high prevalence of Salmonella isolation has been found in pigs at slaughter, as well as in carcasses (KICH et al, 2011). These results demonstrate that control measures must be implemented on farms, in order to reduce the number Salmonella positive pigs delivered at slaughterhouses.…”

Section: Introductionmentioning

confidence: 99%

Assessment of different cut-off values of the ELISA-Typhimurium for the discrimination of swine herds with Salmonella isolation

Kich

Costa

Triques

et al. 2016

SCA

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Salmonella control programs require the classification of positive herds according with the prevalence of infected pigs. This must be based on diagnostic methods that are reliable, accurate and cost effective. Since serological methods fulfill most of these prerequisites, many countries have adopted indirect ELISA tests to discriminate herds, based on their seroprevalence. In view of that, an in-house indirect ELISA test (ELISA-Typhimurium) previously developed proved to be able to detect sera antibodies against the most prevalent serovars of Salmonella found in Brazilian pig farms. This study aimed to assess different cut-off values of the ELISA-Typhimurium in terms of their correlation with Salmonella isolation results at the herd level. Blood and mesenteric lymph node or rectal swabs were taken from 56 slaughter and 14 grower batches from different farms. Serum was tested using the ELISA-Typhimurium at different cut-off points (OD: 6.87%-40%). A total of 55 slaughter batches had at least one Salmonellapositive sample, and the within-herd prevalence was 64.9% (SE±24.8). All 14-grower batches were negative on Salmonella isolation. The logistic regression demonstrated that at 20% OD the ELISATyphimurium test is the best model to predict Salmonella isolation frequency at the herd level. At this cut-off point, the test may be a helpful tool for discriminating Salmonella infected herds.

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“…Batches of pigs with a high Salmonella seroprevalence are delivered to some slaughterhouses (21). Salmonella has been isolated from fresh pork sausages at the retail level (17) and chilled carcasses (13), highlighting the fact that control measures at slaughter need to be improved.…”

mentioning

confidence: 99%

Longitudinal Dissemination of Salmonella enterica Clonal Groups through the Slaughter Process of Salmonella-Positive Pig Batches

Silva

Dias

Ferronatto

et al. 2012

Journal of Food Protection

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This study was conducted to assess the dissemination of Salmonella clonal groups in slaughterhouses that received batches of Salmonella -positive pigs and used different routine processing procedures. Eight serial sampling sessions were conducted in three slaughterhouses (A, B, and C). Blood was collected randomly (n = 25) from each batch of pigs and processed for serology. Carcasses (n = 12) were identified and sampled after dehairing, after singeing, after evisceration, and before chilling. A section of cecum also was collected. Salmonella isolates were submitted to pulsed-field gel electrophoresis. The overall seroprevalence of Salmonella was 80.6% (316 of 392 samples), and cecal contents were positive for Salmonella in 23.8% (26 of 109) of the pigs sampled. Carcasses after dehairing had a significantly higher prevalence of Salmonella (P = 0.004) and the highest Salmonella levels (median = 0.26 log CFU/300 cm(2)). The singeing step significantly affected the Salmonella status of the carcasses (P = 0.001); however, the efficacy of singeing differed among slaughterhouses. In the prechilling step, 14.7% (16 of 109) of the carcasses were positive for Salmonella. Salmonella pulsotypes found on the prechill carcasses were also found in the lairage, in the cecal contents, and on carcasses after dehairing, suggesting that the main source of contamination was the slaughter process before singeing. Slaughterhouse C was the most likely (odds ration [OR] = 6.51) to have pigs carrying Salmonella in the gut, and slaughterhouse B was the most likely (OR = 14.66) to have contaminated carcasses at the prechilling step. These findings indicate that the procedures adopted in slaughterhouse B contributed to the spread of Salmonella strains. In contrast, in slaughterhouse C the Salmonella strains carried by the pigs or found in the lairage were not recovered from prechilled carcasses, validating the effectiveness of the slaughterhouse interventions. These results indicate that an effective slaughter process can help decrease the number of Salmonella-positive carcasses in slaughterhouses that receive Salmonella-positive pig batches.

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Salmonella enterica: isolamento e soroprevalência em suínos abatidos no Rio Grande do Sul

Cited by 15 publications

References 23 publications

Experimental infection of one-day-old chicks with Salmonella Serotypes Previously isolated from poultry facilities, wild birds, and swine

Experimental infection of one-day-old chicks with Salmonella Serotypes Previously isolated from poultry facilities, wild birds, and swine

Assessment of different cut-off values of the ELISA-Typhimurium for the discrimination of swine herds with Salmonella isolation

Longitudinal Dissemination of Salmonella enterica Clonal Groups through the Slaughter Process of Salmonella-Positive Pig Batches

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