Cross-sectional study examining Salmonella enterica carriage in subiliac lymph nodes of cull and feedlot cattle at harvest.

@article{Gragg2013CrosssectionalSE,
  title={Cross-sectional study examining Salmonella enterica carriage in subiliac lymph nodes of cull and feedlot cattle at harvest.},
  author={Sara E Gragg and Guy H. Loneragan and Mindy M Brashears and Terrance M. Arthur and Joseph M. Bosilevac and Norasak Kalchayanand and Rong Wang and John W. Schmidt and J. Chance Brooks and Steven D. Shackelford and Tommy L. Wheeler and Tyson R. Brown and Thomas S Edrington and Dayna M. Brichta-Harhay},
  journal={Foodborne pathogens and disease},
  year={2013},
  volume={10 4},
  pages={
          368-74
        }
}
Bovine peripheral lymph nodes (LNs), including subiliac LNs, have been identified as a potential source of human exposure to Salmonella enterica, when adipose trim containing these nodes is incorporated into ground beef. In order to gain a better understanding of the burden of S. enterica in peripheral LNs of feedlot and cull cattle, a cross-sectional study was undertaken in which 3327 subiliac LNs were collected from cattle at harvest in seven plants, located in three geographically distinct… 

Figures and Tables from this paper

Assessment of Salmonella Prevalence in Lymph Nodes of U.S. and Mexican Cattle Presented for Slaughter in Texas.

It is suggested that factors other than cattle origin may be impacting Salmonella prevalence rates in bovine LNs and that additional research is needed to better understand the role of environment and management-related factors.

Reduced Burden of Salmonella enterica in Bovine Subiliac Lymph Nodes Associated with Administration of a Direct‐fed Microbial

The results indicate that NP51 and NP24 supplementation may aid in reducing the prevalence and concentration of Salmonella in SLNs and, therefore, serve as an effective control measure to reduce Salmoneella in ground beef products.

Salmonella in Peripheral Lymph Nodes of Healthy Cattle at Slaughter

An observed increased in prevalence of Salmonella in PLN during the warmer season, particularly in FF cattle from the southwest region of the US, is documented.

Salmonella Carriage in Peripheral Lymph Nodes and Feces of Cattle at Slaughter Is Affected by Cattle Type, Region, and Season

Salmonella is a significant food safety concern in commercial beef production, and some contamination is thought to occur by inclusion of Salmonella-infected peripheral lymph nodes (LN) in ground

Investigation into Possible Differences in Salmonella Prevalence in the Peripheral Lymph Nodes of Cattle Derived from Distinct Production Systems and of Different Breed Types.

Investigation of differences in Salmonella prevalence in peripheral lymph nodes (LNs) of feedlot cattle and cull cows indicates that the differences observed are not due to breed and are likely a function of age, immune function, or other factors yet to be identified.

Evidence supporting vertical transmission of Salmonella in dairy cattle

Data provide evidence of vertical transmission from a dam to her fetus such that viable calves are born already infected and thereby not requiring faecal–oral exposure for transmission, challenging existing paradigms of Salmonella transmission dynamics within cattle herds.

Efficacy of a Salmonella Siderophore Receptor Protein Vaccine on Fecal Shedding and Lymph Node Carriage of Salmonella in Commercial Feedlot Cattle.

Although vaccinated cattle had numerically fewer Salmonella LN and fecal positives, there were no statistically significant vaccine effects and potential reasons for the lack of vaccine efficacy could include an overwhelming Salmoneella exposure, a lack of cross-protection against non-Newport serotypes, and insufficient duration of immunity relative to harvest.

Salmonella Presence in Mandibular, Mesenteric, and Subiliac Lymph Nodes Collected from Sheep and Goats in the United States.

The data indicate Salmonella is harbored within the lymph nodes of small ruminants of sheep and goats in the United States, and further work can target strategies and interventions to minimize the risk associated with this pathogen during the processing of smallRuminants.

Low Prevalence of Salmonella and Shiga Toxin-Producing Escherichia coli in Lymph Nodes of Australian Beef Cattle.

The low prevalence of Salmonella and low concentration of aerobic microorganisms inSalmonella-positive lymph nodes of Australian cattle at the time of slaughter suggest that the likelihood of lymph nodes contributing significantly to the presence of Salronlla in ground beef is low.

Evaluation of autogenous vaccine use in mitigating Salmonella in lymph nodes from feedlot cattle in Texas.

There could be several causes of decreasedSalmonella presence in the LNs of control cattle, creating an opportunity for future investigation into pre-harvest intervention development to combat Salmonella in feedlots.
...

References

SHOWING 1-10 OF 38 REFERENCES

Reduced Burden of Salmonella enterica in Bovine Subiliac Lymph Nodes Associated with Administration of a Direct‐fed Microbial

The results indicate that NP51 and NP24 supplementation may aid in reducing the prevalence and concentration of Salmonella in SLNs and, therefore, serve as an effective control measure to reduce Salmoneella in ground beef products.

Microbiological analysis of bovine lymph nodes for the detection of Salmonella enterica.

Infection studies showed that, on average, 23 to 43 % of the inoculated LN samples in this study were cross-contaminated by Salmonella on surrounding adipose tissue when present in the range of 10(1) to 10(2) CFU per sample; however, surface decontamination methods were very effective at removingSalmonella cross- Contaminants in this range.

Prevalence and characterization of Salmonella in bovine lymph nodes potentially destined for use in ground beef.

The objective of the current study was to determine the prevalence and multidrug-resistance status of Salmonella in bovine lymph nodes associated with lean and fat trimmings that might be utilized in ground beef production.

Investigation into Possible Differences in Salmonella Prevalence in the Peripheral Lymph Nodes of Cattle Derived from Distinct Production Systems and of Different Breed Types.

Investigation of differences in Salmonella prevalence in peripheral lymph nodes (LNs) of feedlot cattle and cull cows indicates that the differences observed are not due to breed and are likely a function of age, immune function, or other factors yet to be identified.

Evidence supporting vertical transmission of Salmonella in dairy cattle

Data provide evidence of vertical transmission from a dam to her fetus such that viable calves are born already infected and thereby not requiring faecal–oral exposure for transmission, challenging existing paradigms of Salmonella transmission dynamics within cattle herds.

Salmonella enterica Burden in Harvest-Ready Cattle Populations from the Southern High Plains of the United States

The results demonstrate that even though S. enterica isolates are readily recoverable from harvest-ready cattle, multiply resistant variants are rare and are associated with specific serovars in cattle harvested because of poor productivity characteristics.

Salmonella diversity and burden in cows on and culled from dairy farms in the Texas High Plains.

Evidence is found that the whole-herd use of a siderophore receptor and porin protein-containing vaccine might be a useful aid in the control of Salmonella in groups of cattle.

Isolation of Salmonella from mesenteric lymph nodes of healthy cattle at slaughter.

Oral salmonella challenge and subsequent uptake by the peripheral lymph nodes in calves.

Results of this research demonstrated that a substantial oral challenge is required to produce Salmonella-positive PLNs in cattle, and increased exposure time to lower doses may produce the same effect observed in experiment 3.