Effect of Short-Term Lairage on the Prevalence of Salmonella enterica in Cull Sows†

2004 ◽  
Vol 67 (7) ◽  
pp. 1489-1493 ◽  
Author(s):  
S. T. LARSEN ◽  
H. S. HURD ◽  
J. D. McKEAN ◽  
R. W. GRIFFITH ◽  
I. V. WESLEY
Keyword(s):  
Lymph Node ◽  
Salmonella Enterica ◽  
Control Point ◽  
Swine Farm ◽  
Short Term ◽  
Production Chain ◽  
Pork Production ◽  
Ground Pork ◽  
Left And Right ◽  
Cull Sows

This study was designed to compare Salmonella enterica prevalence in sows held in a holding pen at the abattoir for approximately 2 h (hold sows) with sows slaughtered immediately after transport to the abattoir (no-hold sows). Cull sows (n = 160) were sampled from four sampling periods over 8 weeks (February to March 2002) at the abattoir. Sows originated from an integrated swine farm and were sent to a live-hog market and then to the slaughter facility. Before testing, sows entered the abattoir pen and four 100-cm2 four-ply gauze squares were placed randomly on the pen floor for S. enterica culture. Sows were alternatively assigned to the hold or no-hold group. Samples collected from sows during slaughter were ileocecal lymph node, cecal contents, transverse colon contents, subiliac lymph node, sponge swabs of the left and right carcass section (300 cm2), and chopped meat. Overall, S. enterica was isolated from 44% (35 of 80) of the no-hold sows, which was significantly less (P < 0.05) than 59% (47 of 80) of the held sows. Also, no-hold sows had a lower cecal content prevalence (39%, 31 of 80) compared with that (55%, 44 of 80) of held sows (P < 0.05). S. enterica serovars isolated from no-hold sows were Brandenburg (n = 16), Derby (n = 12), Hadar (n = 8), Infantis (n = 6), Johannesburg (n = 3), 6,7:z10-monophasic (n = 3), and Typhimurium (n = 1). S. enterica serovars isolated from held sows (n = 61 isolates) were Derby (n = 19), 6,7: z10-monophasic (n = 15), Brandenburg (n = 10), Infantis (n = 6), Hadar (n = 5), Johannesburg (n = 4), and Tennessee (n = 2). Serovars recovered from the pen were Reading (n = 6), Derby (n = 4), Uganda (n = 2), and Manhattan (n = 2). Results of this study suggest that holding pens contribute to increased S. enterica carriage in cull sows. Abattoir holding pens might be an important control point for S. enterica in the ground pork production chain.

scholarly journals Salmonella enterica Infections in Market Swine with and without Transport and Holding

2002 ◽  
Vol 68 (5) ◽  
pp. 2376-2381 ◽  
Author(s):  
H. S. Hurd ◽  
J. D. McKean ◽  
R. W. Griffith ◽  
I. V. Wesley ◽  
M. H. Rostagno
Keyword(s):  
Lymph Nodes ◽  
Salmonella Enterica ◽  
Control Point ◽  
Isolation Rate ◽  
Fecal Matter ◽  
Production Chain ◽  
Pork Production ◽  
On Farm

ABSTRACT The objective of this study was to compare, by using identical sample types, the Salmonella enterica prevalences and serovar diversities between pigs necropsied on the farm and those necropsied at the abattoir after transport and holding. We necropsied 567 market weight pigs (>70 kg) from six herds. Pigs were alternately assigned to be necropsied on the farm or at the abattoir. One-half of the group was sent in clean, disinfected trailers to slaughter at a commercial abattoir. After transport (mean distance, 169 km) and 2 to 3 h of holding in antemortem pens, these pigs were necropsied. The 50 pigs remaining on the farm were necropsied the following day. The same sample types and amounts were collected for S. enterica culture at both locations. Results show a sevenfold-higher (P < 0.001) S. enterica isolation rate from pigs necropsied at the abattoir (39.9%; 114 of 286) than from those necropsied on the farm (5.3%; 15 of 281). This difference was also observed for each individual herd. All sample types showed a significantly higher prevalence when comparing abattoir to on-farm collection, respectively: lymph nodes, 9.15 versus 3.6%; cecal contents, 13.6 versus 1.8%; 1 g of fecal matter, 25.2 versus 0.7%. Recovery of additional serovars at the abattoir suggests the pigs are receiving S. enterica from extra-farm sources. This study demonstrates that rapid infection during transport, and particularly during holding, is a major reason for increased S. enterica prevalence in swine. This finding identifies the holding pen as an important S. enterica control point in the pork production chain.

Salmonella enterica 4,[5],12:i:- an emerging threat for the swine feed and pork production industry

2021 ◽  
Author(s):  
Olivia Harrison ◽  
Susan Rensing ◽  
Cassandra K. Jones ◽  
Valentina Trinetta
Keyword(s):  
Salmonella Enterica ◽  
Animal Health ◽  
Meat Products ◽  
The United States ◽  
Foodborne Illness ◽  
Pulse Field ◽  
Human Consumption ◽  
Production Chain ◽  
Pork Production ◽  
Swine Feed

Salmonella continues to be a significant cause of foodborne illnesses in human medicine. The Centers for Disease Control and Prevention reported Salmonella as the second leading cause of foodborne illness in the United States, and the leading cause of both hospitalizations and deaths. Salmonella enterica 4,[5],12:i:- (STM) is a monophasic variant of S. Typhimurium and it is an emerging threat to both human and animal health. STM was first identified in the 1980’s from poultry products and has become increasingly prevalent in meat products including pork. STM has also been identified in swine farms as well as feed manufacturing environments and feed itself. Similar pulse-field gel electrophoresis profiles have been observed between human clinical cases and the STM samples originating from swine feed. These related profiles suggest a link between swine ingesting contaminated feed and the source of foodborne illness in human. The objective of this article was to better understand the history of STM and the possible pathway between swine feed to the household table. Continued research is necessary to better understand how STM can enter both the feed supply chain and the pork production chain to avoid contamination of pork products destined for human consumption.

Impact of Commercial Preharvest Transportation and Holding on the Prevalence of Salmonella enterica in Cull Sows†

2003 ◽  
Vol 66 (7) ◽  
pp. 1134-1138 ◽  
Author(s):  
S. T. LARSEN ◽  
J. D. McKEAN ◽  
H. S. HURD ◽  
M. H. ROSTAGNO ◽  
R. W. GRIFFITH ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Lymph Nodes ◽  
Transverse Colon ◽  
Salmonella Enterica ◽  
Isolation Rate ◽  
Fecal Samples ◽  
H 41 ◽  
Left And Right ◽  
Cull Sows

The objective of this study was to examine the prevalence of Salmonella enterica in cull sows at various stages from the farm to the abattoir. Cull sows (n = 181) were sampled over 10 weeks. Fecal samples (10 g each) were collected on the farm ca. 24 h before loading and at the live-hog market ca. 3 h before loading. Samples (ileocecal lymph nodes, cecal contents, feces from the transverse colon, ventral thoracic lymph nodes, subiliac lymph nodes, sponge swabs of the left and right carcass sections, and chopped meat) were collected at the abattoir. The percentages of positive fecal samples on the farm and at the live-hog market were 3% (5 of 181 samples) and 2% (3 of 181 samples), respectively. After transport from the live-hog market (10 h) and holding at the abattoir (6 h), 41% (74 of 180) of cull sows yielded S. enterica in one or more sampled tissues. The isolation rate for total cecal contents (33%; 60 of 180 samples) was significantly (P &lt; 0.05) higher than those for ileocecal lymph nodes (7%; 12 of 181 samples), feces (11%; 20 of 181 samples), and ventral thoracic and subiliac lymph nodes (2%; 4 of 181 samples). Before a 2% lactic acid carcass wash (lasting 8 to 9 s), 14% (25 of 180) of carcasses were positive, compared with 7% (12 of 179) after the wash (P &lt; 0.05). Two S. enterica serotypes, Derby and Infantis, were found on the farm and at the live-hog market. At the abattoir, 12 serotypes that had not previously been found on the farm or at the live-hog market were recovered. The results of this study demonstrate that transport and holding practices may contribute to an increase in S. enterica infection prior to slaughter to levels much higher than those found on the farm.

scholarly journals Preslaughter Holding Environment in Pork Plants Is Highly Contaminated with Salmonella enterica

2003 ◽  
Vol 69 (8) ◽  
pp. 4489-4494 ◽  
Author(s):  
M. H. Rostagno ◽  
H. S. Hurd ◽  
J. D. McKean ◽  
C. J. Ziemer ◽  
J. K. Gailey ◽  
...  
Keyword(s):  
Drinking Water ◽  
Lymph Nodes ◽  
Salmonella Enterica ◽  
Control Point ◽  
High Capacity ◽  
Positive Sample ◽  
Isolation And Identification ◽  
Production Chain ◽  
Holding Period ◽  
Infection Source

ABSTRACT The objective of this study was to determine whether abattoir pens can provide a Salmonella enterica infection source during the 2 to 4 h of preharvest holding. Previous work has suggested that pigs may be getting infected, but little has been reported on the environmental contamination of abattoir holding pens. For 24 groups of pigs studied (∼150 animals/group) at two high-capacity abattoirs, six pooled fecal samples (n, 10 per pool) were collected from each transport trailer immediately after pigs were unloaded. Holding pens were sampled (one drinking water sample and six pooled floor samples consisting of swabs, residual liquid, and feces) prior to entry of study pigs for the routine holding period (∼2.5 h). After slaughter, cecal contents and ileocecal lymph nodes were collected, on the processing line, from 30 pigs in each studied group. All samples were cultured for the isolation and identification of S. enterica by primary enrichment in GN-Hajna and tetrathionate broths, secondary enrichment in Rappaport-Vassiliadis broth, and plating on brilliant green sulfa and xylose-lysine-tergitol-4 agars, followed by biochemical and serological identification. The study pens were highly contaminated with S. enterica; all holding pens sampled had at least one positive sample. Additionally, 33% (8 of 24) of drinking water samples were positive for S. enterica. All 24 groups of pigs had S. enterica-positive cecal contents and ileocecal lymph nodes, including those groups from transport trailers with no positive samples. From pigs, trailers, and pens, 586 isolates representing 36 different Salmonella serovars were isolated. Of the 353 isolates from pigs (109 from ileocecal lymph nodes plus 244 from cecal contents), 19% were identified as belonging to the same serovars as those isolated from the respective pens; 27% were identified as belonging to the same serovars as those isolated from the trailers. Sixteen percent of the unique serovars were isolated from both pigs and pens, suggesting that pens served as the infection source. This study demonstrates highly contaminated abattoir holding pens and watering sources. It also demonstrates that holding pens can serve as an infection source. This study identifies the abattoir holding pens as a significant hazard and a potential control point for Salmonella contamination in the preharvest pork production chain.

scholarly journals Edemas of the face and lymphoscintigraphic examination

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pierre Bourgeois ◽  
E. Peters ◽  
A. Van Mieghem ◽  
A. Vrancken ◽  
G. Giacalone ◽  
...  
Keyword(s):  
Head And Neck Cancer ◽  
Lymph Node ◽  
Cervical Lymph Node ◽  
Cervical Vertebra ◽  
Lymphatic Drainage ◽  
The Face ◽  
Facial Edema ◽  
Post Traumatic ◽  
Left And Right ◽  
Lymphatic Pathways

AbstractFacial edemas not secondary to surgery and/or radiotherapy for head and neck cancer are relatively uncommon. Our aim is to report a retrospective analysis of the lymphoscintigraphic and SPECT-CT investigations obtained in patients with such facial edema. Retrospective review of exams (planar imagings in all and with SPECT-CT in 5) obtained after the subcutaneous injection of 99mTc HSA Nanosized colloids between the eyebrows in five men and seven women. Four main lymphatic pathways were identified on sequential planar imagings: para-nasal left and right and supra- ocular left and right. For eleven patients, the absence of visualization of lymphatic drainage and/or their delayed appearance correlated well with the localisation of the edematous areas. In two patients with post-traumatic and post- surgical edemas, SPECT-CT showed one deep left sided cervical lymph node (LN) in front of the first cervical vertebra. This lymphoscintigraphic approach represents a simple and valuable way to assess the lymphatic drainage pathways of the face and to establish the diagnosis of facial lymphedema.

Prognostic Relevance of Celiac Lymph Node Involvement in Ovarian Cancer

2014 ◽  
Vol 24 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Alejandra Martínez ◽  
Cristophe Pomel ◽  
Thomas Filleron ◽  
Marjolein De Cuypere ◽  
Eliane Mery ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Overall Survival ◽  
Lymph Node ◽  
Oncologic Outcome ◽  
Progression Free Survival ◽  
Disease Spread ◽  
Short Term ◽  
Free Survival ◽  
Increased Risk

ObjectiveThe aim of the study was to report on the oncologic outcome of the disease spread to celiac lymph nodes (CLNs) in advanced-stage ovarian cancer patients.MethodsAll patients who had CLN resection as part of their cytoreductive surgery for epithelial ovarian, fallopian, or primary peritoneal cancer were identified. Patient demographic data with particular emphasis on operative records to detail the extent and distribution of the disease spread, lymphadenectomy procedures, pathologic data, and follow-up data were included.ResultsThe median follow-up was 26.3 months. The median overall survival values in the group with positive CLNs and in the group with negative CLNs were 26.9 months and 40.04 months, respectively. The median progression-free survival values in the group with metastatic CLNs and in the group with negative CLNs were 8.8 months and 20.24 months, respectively (P = 0.053). Positive CLNs were associated with progression during or within 6 months after the completion of chemotherapy (P = 0.0044). Tumor burden and extensive disease distribution were significantly associated with poor progression-free survival, short-term progression, and overall survival. In multivariate analysis, only the CLN status was independently associated with short-term progression.ConclusionsDisease in the CLN is a marker of disease severity, which is associated to a high-risk group of patients with presumed adverse tumor biology, increased risk of lymph node progression, and worst oncologic outcome.

Volume-controlled vs no/short-term drainage after axillary lymph node dissection in breast cancer surgery: A meta-analysis

The Breast ◽  
2009 ◽  
Vol 18 (2) ◽  
pp. 109-114 ◽  
Author(s):  
R.A. Droeser ◽  
D.M. Frey ◽  
D. Oertli ◽  
D. Kopelman ◽  
M.J. Baas-Vrancken Peeters ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Lymph Node ◽  
Axillary Lymph Node Dissection ◽  
Axillary Lymph Node ◽  
Meta Analysis ◽  
Breast Cancer Surgery ◽  
Axillary Lymph ◽  
Node Dissection ◽  
Short Term ◽  
Volume Controlled
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