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There are many regions that meet the necessary conditions for sovereign governance in the world, but few secessionist conflicts. I argue that this relative paucity of secessionist violence is the result of government preemption of potential secessionist movements. Using cross-national geospatial data from 1992 to 2013, I find that governments invest more, measured via nighttime light emissions, in more secession-prone regions. The same factors that make territory attractive for secession, such as large populations and international borders, also make governments willing to work to retain control of that territory, contributing to the scarcity of separatist civil conflicts.

While the samples and data from the Pima Indians of the Gila River Indian Community have been included in many international HLA workshops and conferences and have been the focus of numerous population reports and the source of novel alleles at the classical HLA loci, they have not been studied for the non-classical loci. In order to expand our HLA-disease association studies, we typed over 300 whole genome sequences from full Pima heritage members, controlled for first degree relationship, and employed recently developed computer algorithms to resolve HLA alleles. Both classical-HLA-A, -B, and -C- and non-classical- HLA-E, -F, -G, -J, -L, -W, -Y, -DPA2, -DPB2, -DMA, -DMB, -DOA, -DRB2, -DRB9, TAP1- loci were typed at the 4-field level of resolution. We present allele and selected haplotype frequencies, test the genotype distributions for population structure, discuss the issues that are created for tests of Hardy-Weinberg equilibrium over the four sample spaces of high resolution HLA typing, and address the implications for the evolution of non-classical pseudogenes that are no longer expressed in a phenotype subject to natural selection.

In Alzheimer’s disease, the molecular pathogenesis of the extracellular Aβ-amyloid (Aβ) instigation of intracellular tau accumulation is poorly understood. We employed a high-resolution PET scanner, with low detection thresholds, to examine the Aβ-tau association using a convolutional neural network (CNN), and compared results to a standard voxel-wise linear analysis. The full range of Aβ Centiloid values was highly predicted by the tau topography using the CNN (training R2 = 0.86, validation R2 = 0.75, testing R2 = 0.72). Linear models based on tau-SUVR identified widespread positive correlations between tau accumulation and Aβ burden throughout the brain. In contrast, CNN analysis identified focal clusters in the bilateral medial temporal lobes, frontal lobes, precuneus, postcentral gyrus and middle cingulate. At low Aβ levels, information from the middle cingulate, frontal lobe and precuneus regions was more predictive of Aβ burden, while at high Aβ levels, the medial temporal regions were more predictive of Aβ burden. The data-driven CNN approach revealed new associations between tau topography and Aβ burden.

The Latarjet procedure traditionally has been performed with 2 screws in an open manner. Recently, cortical suture button fixation for coracoid transfer has been used in hopes of mitigating complications seen with screw placement. The aim of this study was to evaluate a cortical suture button and technique currently available in the United States compared with screw fixation in the Latarjet procedure in a cadaveric model.We randomly assigned 9 matched pairs of fresh-frozen cadaveric shoulders (N = 18) to undergo the Latarjet procedure with either screw fixation or cortical suture button fixation. After fixation, all shoulders underwent biomechanical testing with direct loading on the graft vas a material testing system. Cyclic testing was performed for 100 cycles to determine axial displacement with time; each graft was then monotonically loaded to failure.The maximum cycle displacement was significantly less for screw fixation vs. cortical suture button fixation (3.1 ± 1.3 mm vs. 8.9 ± 2.1 mm, P.0001). The total load at failure was 481.1 ± 88.8 N for screws and 175.5 ± 95.8 N for cortical suture buttons (P.0001). Bony damage to the surrounding anatomy was more extensive at failure in the screw-fixation group.At time zero, the cortical button fixation and technique did not resist direct loads to the graft as much as traditional screw fixation, although bony damage to the surrounding anatomy was more extensive in screw fixation than button fixation. In the event of unanticipated loading, this could place a patient at higher risk of graft migration, which could lead to unintended early outcomes. These results support the need for implants and techniques specifically tailored to the Latarjet procedure and should bring into question the adoption of a cortical button and technique not specific to the procedure.

Do rebels target civilians as part of the process of establishing control in their territories? This research note shows that transition periods after rebels gain territorial control are remarkably violent for civilians. Speaking to the civilian victimization and rebel governance literature, we investigate the immediate time period after rebels successfully capture and hold territory. We argue that rebels use violence to gain compliance in newly captured territories until they are able to build up local capacities and institutions for peaceful governance. To test this argument, we draw on methodological advances in integrating event data and combine multiple datasets to study patterns of violence perpetrated by the Revolutionary United Front in Sierra Leone from 1997 to 2001. The findings of our spatiotemporal analysis show that civilian targeting increases in the period after rebels capture territory from the government compared to areas without territorial takeover, suggesting that life under the roof of rebels is initially more dangerous for civilians.

The Pima Indians of the Gila River Indian Community in Arizona have participated in a long-range study of type 2 diabetes mellitus since 1965 and have been the subject of HLA typing and population studies since the early days of serological assays. These data have been in numerous HLA workshops and conferences and have been the source of at least five novel alleles at the classical HLA loci. In recent time nearly the entire study group was subject to next generation sequencing by whole genome or exome technologies, which has allowed us to HLA type over 3000 full heritage persons with recently developed computer algorithms. We present here the results for the classical HLA Loci: HLA-A, B, C, DRA, DRB1, DRB3, DRB4, DRB5, DPA1, DPB1, DQA1, and DQB1 to the third field of resolution for synonymous alleles and type the likely four field resolution alleles from the subset of whole genome sequences. Allele frequencies, and haplotype frequencies at up to five loci, are presented as well as measures of population structure and heterozygosity. We define a core set of HLA variation that approximates the distribution for the Paleo-Indians and impute nine-locus, 4-field haplotypes that are expected to be common in full heritage peoples.

We present the magnetic properties of a new family of S = 1 molecule-based magnets, NiF2(3,5-lut)4·2H2O and NiX2(3,5-lut)4, where X = HF2, Cl, Br, or I (lut = lutidine C7H9N). Upon creation of isolated Ni–X···X–Ni and Ni–F–H–F···F–H–F–Ni chains separated by bulky and nonbridging lutidine ligands, the effect that halogen substitution has on the magnetic properties of transition-metal-ion complexes can be investigated directly and in isolation from competing processes such as Jahn–Teller distortions. We find that substitution of the larger halide ions turns on increasingly strong antiferromagnetic interactions between adjacent Ni2+ ions via a novel through-space two-halide exchange. In this process, the X···X bond lengths in the Br and I materials are more than double the van der Waals radius of X yet can still mediate significant magnetic interactions. We also find that a simple model based on elongation/compression of the Ni2+ octahedra cannot explain the observed single-ion anisotropy in mixed-ligand compounds. We offer an alternative that takes into account the difference in the electronegativity of axial and equatorial ligands., The magnetic properties of well-separated Ni2+ chains are highly dependent on the bridging halide ligands. By increasing the size of the halide ions, we can decrease the single-ion anisotropy such that the system moves from easy plane to easy axis. Through-space magnetic interactions between adjacent Ni2+ ions are also turned on as the larger halides are substituted into the exchange pathway.

What explains right-wing radicalization in the US? Research shows that demographic changes and economic decline drive support for the far-right. We contribute to this research agenda by studying the elusive early stages in the process of radicalization and highlighting an additional factor that contributes to right-wing radicalization in the US: the impact of foreign wars on society at home. We argue that the communities that bear the greatest costs of foreign wars are most prone to high rates of right-wing radicalization. To support this claim, we present robust correlations between participation in the far-right social media website Parler and fatalities among residents who served in the US wars in Iraq and Afghanistan. This correlation holds at both the county and census tract level, and persists after controlling for the level of military service in an area. The costs of the US’s foreign wars have important effects on domestic US.

Dietary supplementation of probiotics is growing as a scientifically valid alternative to antibiotics for enhancement of overall animal health and productivity in aquaculture. Strains of Bacillus subtilis are regarded as attractive probiotic candidates to the fish farming industry; however, there is a limited number of studies focused on the use of specific strains probiotics in tilapia, and therefore complicating replication. The objective of this study was to examine the effect of the strains NZ86 (NRRL B-50136) and O14VRQ (NRRL B-67221) of B. subtilis on various parameters of the innate immunity in Nile tilapia (Oreochromis niloticus) in a 51-day feeding trial. Supplementation of tilapia with either strain resulted in significant increases (p 0.05) in plasma lysozyme concentration of varying degrees throughout the trial. Meanwhile, alternative complement activity was significantly elevated (p 0.05) only after feeding of the NZ86 strain after 14 and 51 days. Conversely, supplementation with O14VRQ resulted in a significant increase (p 0.05) in the percent of neutrophils in the peripheral blood of tilapia by day 28. At the end of the trial, there was a trend towards increased phagocytic and respiratory burst activities observed in immune organ derived leukocytes. Feeding with either probiotic appeared to have an up-regulation on the gene expression of both pro-inflammatory cytokines in the intestine, yet only O14VRQ was significantly different than the control. Moreover, the occurrence of these results could be associated with supplementation of the probiotic strains, given that Bacillus bacteria were observed to populate the intestines of the dietary treatment groups. These results suggest the potential roles of these B. subtilis probiotic candidates to stimulate immune responses both locally and systemically in tilapia.

The magnetic properties of the two isostructural molecule-based magnets---$\mathrm{Ni}{(\mathrm{NCS})}_{2}{(\mathrm{thiourea})}_{2}, S=1 [\mathrm{thiourea}=\mathrm{SC}{({\mathrm{NH}}_{2})}_{2}]$ and $\mathrm{Co}{(\mathrm{NCS})}_{2}{(\mathrm{thiourea})}_{2}, S=3/2$---are characterized using several techniques in order to rationalize their relationship with structural parameters and to ascertain magnetic changes caused by substitution of the spin. Zero-field heat capacity and muon-spin relaxation measurements reveal low-temperature long-range ordering in both compounds, in addition to Ising-like ($Dl0$) single-ion anisotropy (${D}_{\mathrm{Co}}\ensuremath{\sim}\ensuremath{-}100$ K, ${D}_{\mathrm{Ni}}\ensuremath{\sim}\ensuremath{-}10$ K). Crystal and electronic structure, combined with dc-field magnetometry, affirm highly quasi-one-dimensional behavior, with ferromagnetic intrachain exchange interactions ${J}_{\mathrm{Co}}\ensuremath{\approx}+4$ K and ${J}_{\mathrm{Ni}}\ensuremath{\sim}+100$ K and weak antiferromagnetic interchain exchange, on the order of ${J}^{\ensuremath{'}}\phantom{\rule{4pt}{0ex}}\ensuremath{\sim}\ensuremath{-}0.1$ K. Electron charge- and spin-density mapping reveals through-space exchange as a mechanism to explain the large discrepancy in $J$-values despite, from a structural perspective, the highly similar exchange pathways in both materials. Both species can be compared to the similar compounds $M{\mathrm{Cl}}_{2}{(\mathrm{thiourea})}_{4}, M$ = Ni(II) (DTN) and Co(II) (DTC), where DTN is known to harbor two magnetic-field-induced quantum critical points. Direct comparison of DTN and DTC with the compounds studied here shows that substituting the halide ${\mathrm{Cl}}^{\ensuremath{-}}$ ion for the ${\mathrm{NCS}}^{\ensuremath{-}}$ ion results in a dramatic change in both the structural and magnetic properties.

Salmonella serotypes linked to tomato-associated outbreaks were evaluated for survival in soil and water over a 40-day period. Salmonella enterica serotypes Anatum, Baildon, Braenderup, Montevideo, Newport, and Javiana were inoculated separately into sterile soil and water, followed by plating onto TSAYE and XLT4 at 10-day intervals. Biofilm production by Salmonella serotypes was measured on both quartz particles (soil surrogate) and glass coverslips, and was evaluated using a crystal violet dye assay. Salmonella populations in soil and water over 40 days indicated no significant differences between Salmonella serotypes tested (p > 0.05). Over a 40-day period, there was a 1.84 ± 0.22 log CFU/g and 1.56 ± 0.54 CFU/mL decrease in populations of Salmonella in soil and water, respectively. Enumeration indicated that Salmonella population fluctuated in water but decreased linearly in soil. All serotypes tested produced the "red dry and rough" morphotype on Congo Red agar. Biofilm produced by all the Salmonella serotypes tested was significantly different on quartz particles than on glass coverslips (p

Prevalence of diabetes and obesity in Mexican Pima Indians is low, while prevalence is high in Pima Indians in the United States (US); although lifestyle likely accounts for much of the difference, the role of genetic factors is not well-explored. To examine this, we genotyped 359 single nucleotide polymorphisms, including established type 2 diabetes and obesity variants from genome-wide association studies (GWAS) and 96 random markers, in 342 Mexican Pimas. A multimarker risk score of obesity variants was associated with body mass index (BMI; β = 0.81 kg/m(2) per SD, P = 0.0066). The mean value of the score was lower in Mexican Pimas than in US Pimas (P = 4.3×10(−11)), and differences in allele frequencies at established loci could account for ~7% of the population difference in BMI; however, the difference in risk scores was consistent with evolutionary neutrality given genetic distance. To identify loci potentially under recent natural selection, allele frequencies at 283 variants were compared between US and Mexican Pimas, accounting for genetic distance. The largest differences were seen at HLA markers (e.g., rs9271720, difference = 0.75, P = 8.7×10(−9)); genetic distances at HLA were greater than at random markers (P = 1.6×10(−46)). Analyses of GWAS data in 937 US Pimas also showed sharing of alleles identical by descent at HLA that exceeds its genomic expectation (P = 7.0×10(−10)). These results suggest that, in addition to the widely-recognized balancing selection at HLA, recent directional selection may also occur, resulting in marked allelic differentiation between closely related populations.

The presence of dust is ubiquitous in the produce growing environment and its deposition on edible crops could occur. The potential of wind-distributed soil particulate to serve as a vehicle for S. Newport transfer to tomato blossoms and consequently, to fruits, was explored. Blossoms were challenged with previously autoclaved soil containing S. Newport (9.39log CFU/g) by brushing and airborne transfer. One hundred percent of blossoms brushed with S. Newport-contaminated soil tested positive for presence of the pathogen one week after contact (P

In May 2016, labeling of certain nonintact mechanically tenderized beef (MTB) products was mandated in the United States. MTB products should be handled differently by the consumer because pathogens can be transferred from the exterior to the interior of the meat during the tenderization process. Without labeling, it is difficult to visually distinguish between some intact beef and MTB products, which is a concern because MTB products require higher internal cooking temperatures for safety. An exploratory study was conducted to understand consumer understanding of MTB products and consumer responses to the new label. Thirteen focus groups were convened in rural and urban settings across Virginia and North Carolina between December 2015 and May 2016. Sessions were audiorecorded, transcribed verbatim, and analyzed through constant-comparison thematic analysis. Although MTB products were commonly bought, prepared, and consumed, consumer awareness of MTB products and the MTB process was limited. Generally, the label confused participants, and they did not understand the message. Specifically, terminology such as "blade tenderized" and "mechanically tenderized" were preferred over the term "needle tenderized" on labels. Once explained, many individuals wanted more information and better messaging. Through a multiprong approach, other messaging methods (e.g., in stores, through technology, and with certifications) were highly valued by consumers and may result in increased message clarity. Ultimately, the intrinsic and extrinsic properties of the beef rather than the MTB product continued to be the primary guide for purchasing and preparation. This study is the first to be conducted regarding American perceptions of MTB products. An understanding of consumer awareness of MTB products and labels is needed to develop targeted risk messaging communication tools.

The use of prewetted disinfectant towelettes in health care settings proves challenging because they may dry quickly, reducing disinfection. This study examined the drying time of various commercial disinfectant towelettes and the efficacy of these towelettes over time to eliminate Staphylococcus aureus from glass surfaces. This study confirms that these disinfectants dry quickly. Further disinfection after drying time on glass is minimal, but dependent on the type of disinfectant.

Mechanically tenderized beef (MTB) products are non-intact beef products that have been tenderized using blades, needles, or other mechanical processes to improve consumer palatability. MTBs have been associated with outbreaks of Shiga toxin-producing Escherichia coli. MTB labeling was mandated in May 2016; however, consumer awareness of product and label is unclear. A national survey quantified consumer understanding and attitudes surrounding MTBs and its preparation. Many (64%) respondents were unaware that beef is mechanically tenderized; MTB label awareness was also low. Thirty-eight percent of respondents familiar with MTBs held positive attitudes towards MTBs due to price and convenience. Negative attitudes (24%) towards MTBs stemmed from concerns with the process, its “natural”-ness, and safety. Respondents regularly preparing MTBs reported using inside and/or outside color of the beef product (63%), texture (43%), juice/blood appearance (47%), smell (22%), and/or time (51%) to indicate doneness. While 20% of respondents used a thermometer, 62% reported “always” or “most of the time” preparing MTBs to 160℉. Contradictions may result from social desirability bias and optimism bias to portray selves in a positive light while believing personal preparation methods achieve safe results. Timely and targeted messaging with clear and standardized definitions, developed with consumers, are needed to bring awareness of MTBs and other food safety information to all populations.

BackgroundSince the beginning of the technology, there has been active debate about the role of human leucocyte antigen (HLA) matching in kidney allograft survival. Recent studies have reported diminishing importance of HLA matching, which have, in turn, been challenged by reports that suggest the c

The efficacy of ozone and ultraviolet light (UV) treatment as hurdles against Listeria monocytogenes suspended in fresh (9% NaCl, 91.86% transmittance) and spent brines (20.5% NaCl, 0.01% transmittance) was evaluated. Brines were inoculated with a cocktail of L. monocytogenes-strains N1-227, N3-031, and R2-499. Ozonation was performed by sparging gaseous ozone into brine. This was followed by UV irradiation (253.7 nm) of the brine in sterile quartz cuvettes. Enumeration was performed by spread plating on modified Oxford medium and Trypticase Soy agar supplemented with yeast extract. In fresh brines containing L. monocytogenes, 10 min of ozonation lead to a 7.44 ± 0.13 log CFU/ml mean reduction and 10 min of UV radiation caused a 1.95 ± 0.41 log CFU/ml mean reduction. Sequential exposure of 10 min of ozonation and UV resulted in >9 log CFU/ml reduction in L. monocytogenes populations in fresh brine. Sixty minutes of ozonation of spent brines resulted in a 4.85 ± 0.61 log CFU/ml mean reduction of L. monocytogenes populations. Ten minutes of UV exposure in spent brines resulted in 0.49 ± 0.14 log CFU/ml mean reduction in L. monocytogenes. A sequential treatment of 60 min ozonation and 10 min UV resulted in an excess of 5 log CFU/ml reduction in L. monocytogenes cells in spent brine. Ozonation did not cause a significant increase in the transmittance of the spent brine to aid UV penetration but resulted in color change. Sequential treatments of Ozonation and UV maybe effective in reducing L. monocytogenes in chill brines.

Salmonella, Shiga toxin-producing Escherichia coli (STEC), and Listeria monocytogenes have been isolated from low water activity foods (LWAF), where they may survive for extended periods. The ready-to-eat nature of many LWAF, such as dried fruits and nuts, warrants effective post-harvest thermal treatment for the reduction of pathogens such as low-temperature, saturated steam, also known as vacuum-assisted steam pasteurization. The objective of this study was to determine reductions of Salmonella, STEC, L. monocytogenes, and a possible surrogate (Pediococcus acidilactici) on dried apricot halves, whole macadamia nuts, and raisins after treatment with vacuum-assisted steam at three temperatures (62 °C, 72 °C, or 82 °C) and multiple time intervals. Bacterial inactivation was variable between commodities, with higher temperatures and longer times necessary to achieve comparable reductions of pathogens on apricot halves and macadamia nuts compared to raisins. Reductions of the tested pathogens were comparable; therefore, one species was not more resistant than the others. Pathogens were reduced by 5-log CFU/g on apricot halves after 20 min at 72 °C and after 5 min at 82 °C. Longer treatment times were necessary to achieve reductions of each pathogen on macadamia nuts. Pathogens were reduced by nearly 5 log CFU/g on macadamia nuts after 38 min at 72 °C (4.6–6.5 log CFU/g) and after 12 min at 82 °C (4.9–5.7 log CFU/g). Reductions of pathogens on raisins were achieved at lower temperatures than necessary for the other foods. A 5-log reduction for each of the pathogens (CFU/g) on raisins occurred after 20 min at 62 °C and after 5 min at 72 °C. Overall, the reductions of the pathogens exceeded those of P. acidilactici on both the dried fruits and macadamia nuts. Statistically significant differences, indicating greater confidence as a conservative surrogate, were observed at lower treatment temperatures. Inactivation kinetics were modeled for each pathogen on each food type and temperature. Bacterial survival was best described by the Weibull model for raisins and macadamia nuts, while the Gompertz model best described reductions on apricot halves according to Akaike information criterion (AIC) and root-mean-square error (RMSE) evaluations. Water activity and moisture content were increased due to the treatments, which could be addressed through implementation of drying steps. Thermal inactivation kinetic models and 5-log reduction parameters can help food processors design and evaluate similar vacuum-assisted steam interventions to comply with FSMA regulations and preventive control plans. However, results or model predictions should not be extrapolated to assume the safety of other types of foods.

Propylene oxide (PPO), a chemical fumigant, has been validated to reduce Salmonella on bulk almonds but has not been evaluated for other tree nuts. There is a need to identify nonpathogenic surrogate microorganisms whose inactivation is comparable to that of Salmonella to assure effective PPO processing parameters in different packaging configurations without introducing Salmonella into the pasteurization facility. The objective of this research was to compare the reduction of Salmonella and three potential surrogate bacterial strains, Enterococcus faecium ATCC 8459, Pediococcus acidilactici ATCC 8042, or Staphylococcus carnosus ATCC 51365, on cashews and macadamia nuts processed by using PPO. Whole cashews and macadamia nuts were coinoculated with a five-strain cocktail of Salmonella and one surrogate, dried to the original water activity of 0.44 to 0.51 before being packaged in woven polypropylene bags (2.3 kg), and shipped overnight in Styrofoam containers under ambient conditions to a commercial facility for PPO treatment. Salmonella and surrogates were recovered by vigorous shaking in phosphate buffer (1:1, m/v), serial diluted, and plated onto tryptic soy agar with an overlay of xylose lysine Tergitol 4 for Salmonella or mannitol salt agar or bile esculin azide agar for each surrogate. The mean log reductions of Salmonella and each surrogate ( n = 18), within a sample and among all trials (three independent), were compared by using a matched pairs t test. Reduction in log CFU per gram of Salmonella was significantly greater than that of E. faecium on both macadamia nuts (7.3 ± 0.19 versus 6.4 ± 0.31) and cashews (5.4 ± 0.15 versus 5.1 ± 0.25) and significantly greater than P. acidilactici on both nuts (7.8 ± 0.22 versus 6.3 ± 0.33 on macadamia nuts and 4.9 ± 0.22 versus 4.1 ± 0.25 on cashews). Reduction of S. carnosus exceeded that of Salmonella. E. faecium and P. acidilactici may be considered as surrogates for Salmonella on whole macadamia nuts and cashews processed by using PPO.

Salmonellosis has been increasingly associated with contaminated spices. Identifying inoculation and stabilization methods for Salmonella on whole spices is important for development of validated inactivation processes. The objective of this study was to examine the effects of inoculation preparation on the recoverability of Salmonella enterica from dried whole peppercorns and cumin seeds. Whole black peppercorns and cumin seeds were inoculated with S. enterica using one dry transfer method and various wet inoculation methods: immersion of spice seeds in tryptic soy broth (TSB) plus Salmonella for 24 h (likely leading to inclusion of Salmonella in native microbiota biofilms formed around the seeds), application of cells grown in TSB, and/or application of cells scraped from tryptic soy agar (TSA). Postinoculation seeds were dried to a water activity of 0.3 within 24 h and held for 28 days. Seeds were sampled after drying (time 0) and periodically during the 28 days of storage. Salmonella cells were enumerated by serial dilution and plated onto xylose lysine Tergitol (XLT4) agar and TSA. Recovery of Salmonella was high after 28 days of storage but was dependent on inoculation method, with 4.05 to 6.22 and 3.75 to 8.38 log CFU/g recovered from peppercorns and cumin seeds, respectively, on XLT4 agar. The changes in surviving Salmonella (log CFU per gram) from initial inoculation levels after 28 days were significantly smaller for the biofilm inclusion method (z0.142pepper, z0.186cumin) than for the other inoculation methods (20.425pepper, 22.029cumin for cells grown on TSA; 20.641pepper, 20.718cumin for dry transfer; 21.998pepper for cells grown in TSB). In most cases, trends for reductions of total aerobic bacteria were similar to those of Salmonella. The inoculation method influenced the recoverability of Salmonella from whole peppercorns and cumin seeds after drying. The most stable inoculum strategies were dry transfer, 24-h incubation of Salmonella and spices in TSB (i.e., potential inclusion of Salmonella within native microbiota biofilms), and inoculation of Salmonella cells grown on TSA subsequent to drying. However, with the dry transfer method it was difficult to obtain the large amount of inoculum needed for inactivation studies. Published version This article was submitted using Open Access

Cetylpyridinium chloride (CPC) solutions (0, 0.5, or 1.0%) were applied to cantaloupe (“Athena” and “Hale's Best Jumbo” cultivars) rind plugs, either before or after inoculation with a broth culture of Salmonella Michigan (109 CFU/mL) and held at 37°C for 1 or 24 hr. Rind plugs were diluted, shaken, and sonicated, and solutions were enumerated. Texture quality and color were evaluated over 14 days storage at 4°C after 0 and 1% CPC spray applications. A 0.5 or 1.0% (vol/vol) application of CPC after Salmonella reduced the pathogen levels between 2.34 log CFU/mL and 5.16 log CFU/mL in comparison to the control (p

Listeria monocytogenes is a foodborne pathogen that represents a high risk for consumers because it can grow under refrigeration conditions and can also develop acid tolerance. Fresh blueberries are hand-picked, packed, and transported under refrigeration without receiving a microbial inactivation treatment. The aim of this work was to study the survival of L. monocytogenes in fresh highbush blueberries stored at 4 or 12 °C under different controlled atmosphere conditions, including air (control); 5% O2, 15% CO2, 80% N2 (controlled atmosphere storage [CAS]); or ozone gas (O3), 4 ppm at 4 °C or 2.5 ppm at 12 °C, at high relative humidity (90 to 95%) for a total of 10 days. Fresh blueberries inside a plastic clamshell were spot inoculated with the bacteria and were stored at 4 or 12 °C in isolated cabinets under air, CAS, and O3 atmospheric conditions. Samples were evaluated on days 0, 1, 4, 7, and 10 for microbial growth using modified Oxford agar. CAS did not delay or inhibit L. monocytogenes growth in fresh blueberries after 10 days. O3 achieved 3- and 2-log reductions when compared with air treatment at 4 and 12 °C, respectively. Low concentrations of O3 together with proper refrigeration temperature can ensure product safety throughout transportation. O3 is a strong antimicrobial that safely decomposes to oxygen and water without leaving residues and can be used as an alternative method to prevent bacterial growth during a long transport period.

We present the results of muon-spin relaxation ($��^{+}$SR) measurements on antiferromagnetic and ferromagnetic spin chains. In antiferromagnetic CuF$_{2}$(pyz) we identify a transition to long range magnetic order taking place at $T_{\mathrm{N}} = 0.6(1)$ K, allowing us to estimate a ratio with the intrachain exchange of $T_{\mathrm{N}}/|J| \approx 0.1$ and the ratio of interchain to intrachain exchange coupling as $|J'/J| \approx 0.05$. The ferromagnetic chain [Sm(hfac)$_{3}$(boaDTDA)]$_{n}$ undergoes an ordering transition at $T_{\mathrm{c}}=2.8(1)$ K, seen via a broad freezing of dynamic fluctuations on the muon (microsecond) timescale and implying $T_{\mathrm{c}}/|J| \approx 0.6$. The ordered radical moment continues to fluctuate on this timescale down to 0.3 K, while the Sm moments remain disordered. In contrast, the radical spins in [La(hfac)$_{3}$(boaDTDA)]$_{n}$ remain magnetically disordered down to $T=0.1$ K suggesting $T_{\mathrm{c}}/|J| < 0.17$., 13 pages, 5 figures

Background: Scaphoid and radial head fractures are two injuries derived from the common fall on outstretched hand. How these injuries are related has not been fully investigated. The aim of this study was to evaluate risk factors for having concomitant proximal radius and scaphoid fractures. The goal was to identify at-risk patient populations and drive improvement in diagnosis and management of these injuries. Methods: A retrospective review of the National Trauma Data Bank from 2007 through 2012 identified 11,309 patients with proximal radius fracture, and, as a proxy for low-energy injury, an injury severity score of less than 15. These patients were then categorized by presence of concomitant scaphoid injury. Presence of scaphoid fracture was then analyzed based on age, sex, race, trauma type, mechanism, and injury severity score. Results: Three hundred seventy-eight (3%) scaphoid fractures among the 11,309 proximal radius fractures were identified. Both age and sex reached statistical significance as risk factors for concomitant scaphoid and radial head injury. There was an incremental increase in risk for concomitant injury with younger age. Subset analysis demonstrated a 10% incidence of concomitant fractures in men aged 18 to 30 years. Discussion: This study provides a better understanding of how these two fractures are related. There is a markedly higher risk for concomitant injuries in male and young patients, especially those whose mechanism is a fall. Close examination of the wrist should be performed for any proximal radius fracture, and any pain should be a cause for further investigation of scaphoid injury.

Objective.To determine the patient- and device-specific risk factors for hospital-acquired peripherally inserted central venous catheter–related bloodstream infections (PICC BSIs) in adult patients.Design.Nested case-control study.Setting.Barnes-Jewish Hospital, a 1,252-bed tertiary care teaching hospital.Patients.Adult patients with PICCs placed from January 1, 2006, through July 31, 2008.Methods.PICC BSI cases were identified using the National Healthcare Safety Network definition. Uninfected control patients with PICCs in place were randomly selected at a 3: 1 ratio. Patient- and device-related variables were examined using multivariate analysis.Results.The overall PICC BSI rate was 3.13 per 1,000 catheter-days. Independent risk factors for PICC BSIs included congestive heart failure (odds ratio [OR], 2.0 [95% confidence interval (CI), 1.26–3.17];P= .003), intra-abdominal perforation (OR, 5.66 [95% CI, 1.76–18.19];P= .004),Clostidium difficileinfection (OR, 2.25 [95% CI, 1.17–4.33];P= .02), recent chemotherapy (OR, 3.36 [95% CI, 1.15–9.78];P= .03), presence of tracheostomy (OR, 5.88 [95% CI, 2.99–11.55];P< .001), and type of catheter (OR for double lumen, 1.89 [95% CI, 1.15–3.10];P= .01; OR for triple lumen, 2.87 [95% CI, 1.39–5.92];P= .004). Underlying chronic obstructive pulmonary disease (OR, 0.48 [95% CI, 0.29–0.78];P= .03) and admission to surgical (OR, 0.43 [95% CI, 0.24–0.79];P= .006) or oncology and orthopedic (OR, 0.35 [95% CI, 0.13–0.99];P= .05) services were less likely to be associated with having a PICC BSI.Conclusions.We identified several novel factors related to PICC BSIs. These factors may inform preventive measures.

Background Allografts from living donors survive longer than those from deceased donors but the role of HLA mismatching in living kidney donation is still in question. We examined the effect of HLA compatibility on kidney allograft survival from living donors by studying all first adult kidney transplants performed in the United States over 25 years. Methods Using the United Network for Organ Sharing data, we identified first kidney transplants between October 1, 1987, and December 31, 2013. Recipients were classified by their number of HLA mismatches and stratified by donor origin. Cox multivariate regression analyses adjusting for recipient and donor transplant characteristics were performed to determine impact of HLA compatibility on kidney allograft survival for all living donors and for living related and living unrelated subsets. Results There were 66 596 first adult transplants from living donors with 348 960 years of follow-up. We found a linear relationship between HLA mismatch and allograft survival. In adjusted analyses, among all living donors, 1 mismatch conferred a 44% higher risk, whereas 6 mismatches conferred a twofold higher risk of allograft failure. When using 0-mismatched full siblings as a reference, living-donor kidneys reduce the hazard of failure by approximately 34% when compared with deceased donors. Twenty-five years of transplant experience, stratified by donor source, was summarized and presented as a guide for allocation. Conclusions These data reinforce the importance of optimizing HLA matching to further improve survival in first adult kidney allografts in the future, especially in living unrelated donations, when possible.

Postprocessing contamination of the products in a processing plant has been identified as one of the major reasons for food contamination with Listeria; brining is one such postprocessing area. Our previous study has shown that the combinations of UV and antimicrobials reduces the number of this organism significantly in fresh brine, but brine is usually recycled from days to weeks depending on its use. Therefore, this study is focused on the reduction of L. monocytogenes in recycled chill brine (obtained from a frankfurter processor) using the combinations of UV and antimicrobial agents, such as citric acid (CA), hydrogen peroxide (HP) and dimethyl dicarbonate (DMDC). Results show that the combinations of UV and 2000 ppm and 4000 ppm HP were the most effective treatments in reducing the Listeria population with the total processing time of 120 min. Both of these treatments were found to be more effective than UV or HP alone. Additionally, all other treatments, such as the combinations of UV and CA (0.2 and 0.5%) and UV and DMDC (250 and 500 ppm) were comparatively less effective. This may be due to the presence of organic matter in spent brine, which may have reduced the penetration of UV and availability of antimicrobials for microbial interaction. PRACTICAL APPLICATIONS The brine solutions are generally recycled in industries for up to 4 weeks as per United States Department of Agriculture (USDA) guide. Thus, it is very important to study various treatments to process recycled brine that was used to process ready-to-eat (RTE) meat products to prevent foodborne diseases or outbreaks. The use of UV light and antimicrobial agents to control L. monocytogenes in recycled brines to product cooling in the RTE meat industry is described. The study provides information on exposure time to UV light and level of antimicrobial agent that result in inactivation of the pathogen. Industry may benefit from our research in their validation efforts to control L. monocytogenes for recycled brine in recirculating chill brine systems through the use of UV light and antimicrobial agents.

Background The presence of population structure in a sample may confound the search for important genetic loci associated with disease. Our four samples in the Family Investigation of Nephropathy and Diabetes (FIND), European Americans, Mexican Americans, African Americans, and American Indians are part of a genome- wide association study in which population structure might be particularly important. We therefore decided to study in detail one component of this, individual genetic ancestry (IGA). From SNPs present on the Affymetrix 6.0 Human SNP array, we identified 3 sets of ancestry informative markers (AIMs), each maximized for the information in one the three contrasts among ancestral populations: Europeans (HAPMAP, CEU), Africans (HAPMAP, YRI and LWK), and Native Americans (full heritage Pima Indians). We estimate IGA and present an algorithm for their standard errors, compare IGA to principal components, emphasize the importance of balancing information in the ancestry informative markers (AIMs), and test the association of IGA with diabetic nephropathy in the combined sample. Results A fixed parental allele maximum likelihood algorithm was applied to the FIND to estimate IGA in four samples: 869 American Indians; 1385 African Americans; 1451 Mexican Americans; and 826 European Americans. When the information in the AIMs is unbalanced, the estimates are incorrect with large error. Individual genetic admixture is highly correlated with principle components for capturing population structure. It takes ~700 SNPs to reduce the average standard error of individual admixture below 0.01. When the samples are combined, the resulting population structure creates associations between IGA and diabetic nephropathy. Conclusions The identified set of AIMs, which include American Indian parental allele frequencies, may be particularly useful for estimating genetic admixture in populations from the Americas. Failure to balance information in maximum likelihood, poly-ancestry models creates biased estimates of individual admixture with large error. This also occurs when estimating IGA using the Bayesian clustering method as implemented in the program STRUCTURE. Odds ratios for the associations of IGA with disease are consistent with what is known about the incidence and prevalence of diabetic nephropathy in these populations. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-2654-x) contains supplementary material, which is available to authorized users.

Chill brine used during ready-to-eat meat processing is an important source of postprocessing contamination by Listeria monocytogenes. The efficacy of UV in combination with citric acid (CA; 0.2 and 0.5%), dimethyl dicarbonate (DMDC; 250 and 500 ppm) or hydrogen peroxide (2,000 and 4,000 ppm) was determined to reduce L. monocytogenes in chill brine to below detectable levels after enrichment. Fresh brine solution was inoculated with L. monocytogenes and exposed to UV and/or antimicrobial agent at −1C in a recirculating UV treatment unit. When L. monocytogenes was no longer detectable via direct plating on MOX, enrichment in brain–heart infusion broth was performed, and suspect colonies were confirmed using API Listeria. The combinations of UV + 0.5% CA and UV + 500-ppm DMDC were found to be the most effective, where L. monocytogenes was undetectable via enrichment at 45 and 60 min of treatment, respectively. CA (0.5%) when used in the absence of UV resulted in nondetection of L. monocytogenes. However, the reduction rate was higher when UV was used concurrent with CA. This work indicates that combinations of UV and antimicrobials may be more effective than either of the treatments alone for the reduction of L. monocytogenes in fresh brines. PRACTICAL APPLICATIONS This paper describes the use of UV light and antimicrobial agents to control L. monocytogenes in chilled brines used for product cooling in the ready-to-eat meat industry. The data include time of exposure to UV light and level of antimicrobial agent, which result in inactivation of the pathogen. These data may support industry efforts to validate the use of UV light and antimicrobial agents to control L. monocytogenes in recirculating chill brine systems.

Over the past 10–15 years, equipment manufacturers have addressed the issues related to the use of telematics for construction equipment, trying to provide both the customer and themselves with relevant data to improve the functionality, operation, maintenance, and management of this equipment. Each manufacturer approached this task independently with varying ideas on how to best accomplish this.

Fresh and fresh-cut tomatoes have been associated with numerous outbreaks of salmonellosis in recent years. One effective post harvest treatment to reduce Salmonella enterica in tomatoes may be high pressure processing (HPP). The objectives of the study were to determine the potential for HPP to reduce S. enterica serovars Newport, Javiana, Braenderup and Anatum in tryptic soy broth (TSB) and to determine the effect of HPP to reduce the most pressure resistant of the four serovars from fresh diced and whole tomatoes. To evaluate pressure resistance, TSB containing 8 log CFU/ml of one of the four serovars was packaged in sterile stomacher bags and subjected to one of three different pressures (350, 450 or 550MPa) for 120s. The most pressure resistant S. enterica serovar evaluated was Braenderup. Subjecting the broth culture to 350, 450 and 550MPa resulted in a 4.53, 5.74 and 7.09 log reduction in S. Braenderup, respectively. Diced tomatoes (150g) and whole red round tomatoes (approximately 150g) were inoculated with 0.1ml of 9.1 log CFU/ml S. Braenderup, and subjected to the same pressure treatments (350, 450 or 550MPa). Significant reductions of S. Braenderup concentrations in diced tomatoes (P0.05) were seen after processing at 350 (0.46CFU/g), 450 (1.44 log CFU/g), and 550MPa (3.67 log CFU/g). In whole tomatoes, significant reductions (P0.05) were also seen at 350 (1.41 log CFU/g), 450 (2.25 log CFU/g) and 550MPa (3.35 log CFU/g). HPP may be an effective post harvest strategy to reduce low levels of S. enterica contamination in whole and diced tomatoes.

Environmental factors encountered during growing and harvesting may contribute to Escherichia coli O157:H7 contamination of lettuce. Limited nutrients and extended exposure to water may cause E. coli O157:H7 to shed its O antigen. Absence of the O157-polysaccharide antigen could affect the cell's physicochemical properties (hydrophobicity and cell charge) and ultimately influence its attachment to surfaces. The objectives of this study were to evaluate the effect of the E. coli O157:H7 O-antigen on the cell's overall hydrophobicity, charge and ability to attach to cut edge and whole leaf iceberg lettuce surfaces. Three strains of E. coli O157:H7 (86-24 wild type; F-12, mutant lacking the O-antigen and pRFBE, plasmid for O157 gene reintroduced) were examined for their hydrophobicity, overall charge and ability to attach to lettuce. Overall, E. coli O157:H7 attached at higher levels to cut surfaces over whole leaf surfaces (P=0.008) for all strains and treatments. Additionally, the strain lacking the O-antigen (F12)-attached significantly less to lettuce (P=0.015) than the strains expressing the antigen (WT and pRFBE). Cells lacking the O antigen (strain F-12) were also significantly more hydrophobic than strains 86-24 or pRFBE (P≤0.05). Surface charge differed among the strains tested (P≤0.05); however, it did not appear to influence bacterial attachment to lettuce surfaces. The charge was not fully restored in the pRFBE strain (expression of O-antigen reintroduced), therefore, no conclusions can be made pertaining to the effect of charge on attachment in this study. Results indicate that E. coli O157:H7 cells which lack the O-antigen have greater hydrophobicity and attach at lower concentrations than cells expressing the O-antigen, to iceberg lettuce surfaces.

AIMS/HYPOTHESIS: We sought to identify the physiological implications of genetic variation at the HLA-DRB1 region in full-heritage Pima Indians in Arizona. METHODS: Single-nucleotide polymorphisms from the HLA region on chromosome 6p were tested for association with skeletal muscle mRNA expression of HLA-DRB1 and HLA- DRA, and with type 2 diabetes mellitus and prediabetic traits. RESULTS: The A allele at rs9268852, which tags HLA-DRB1 *02 (1602), was associated both with higher HLA-DRB1 mRNA expression (n =133, p=4.27×10−(14)) and decreased risk of type 2 diabetes (n=3,265, OR 0.723, p=0.002). Among persons with normal glucose tolerance (n=266) this allele was associated with a higher mean acute insulin response during an intravenous glucose tolerance test (p=0.005), higher mean 30 min insulin concentration during an oral glucose tolerance test (p=0.017) and higher body fat percentage (p=0.010). The polymorphism was not associated with HLA-DRA mRNA expression or insulin sensitivity. CONCLUSIONS/INTERPRETATION: HLA-DRB1*02 is protective for type 2 diabetes, probably by enhancing self tolerance, thereby protecting against the autoimmune-mediated reduction of insulin secretion.

The effects of packaging treatments, postharvest cooling delay and storage duration on color, texture, ascorbic acid content, weight loss and glucosinolate retention in crown-cut heads of broccoli were studied. Broccoli stored in shrink wrap film lost 3.7% of its original weight, whereas ice packaging resulted in 17.4% weight loss during storage. Long postharvest cooling delay and storage duration negatively affected broccoli color. Broccoli heads stored in shrink wrap packaging retained firmness longer than broccoli stored in ice. Ascorbic acid retention was improved in shrink wrapped broccoli, but retention decreased as postharvest cooling delay and storage duration lengthened. Shrink wrapped broccoli exhibited improved retention of the glucosinolate, glucoraphanin. During storage, “Gypsy” broccoli maintained better quality than “Everest” with respect to color, ascorbic acid retention and weight loss. However, “Everest” retained texture (firmness) better after 35 days of storage. Shrink wrap packaging and shorter postharvest cooling delays preserve broccoli quality and increase shelf life. PRACTICAL APPLICATIONS Broccoli has the potential to be a high value crop if the shrink wrap packaging technology can be disseminated to the broccoli growers. Typically, farmers use ice for cooling broccoli heads after harvest, which is an expensive and difficult practice. Without icing requirement, broccoli marketing will be easy and opens up significant potential for broccoli producers who can afford relatively inexpensive film wrapping machines (as compared with ice equipment) in conjunction with onsite cooling. Sometimes onsite cooling is not possible and delays may be involved before the harvested produce is cooled. The conclusions reached in this study shows that shrink wrap packaging can be used to improve quality, retain phytochemical content and prolong the shelf life of crown-cut broccoli.

This study investigated the effects of packaging and storage temperature on the spinach phylloepiphytic bacterial community and fate of Escherichia coli O157:H7. Freshly harvested spinach was rinsed and/or disinfected, packaged and stored under typical retail conditions (4 degrees C) or under temperature abuse conditions (10 degrees C) for a period of 15 days. The final population size of culturable epiphytic bacteria after 15 days of storage was not affected by the temperature of storage or the presence of E. coli O157:H7. However, analysis of the bacterial community using denaturing gradient gel electrophoresis of 16s rDNA revealed changes with time of storage and the presence of E. coli O157:H7. Excision and sequencing of prominent DGGE bands identified that the majority of sequences belonged to the phyla Actinobacteria, Bacteroidetes, Firmicutes and Alphaprotebacteria. After 10 days of storage at 4 degrees C or 10 degrees C the population became more dominated by psychrotrophic bacteria. Removal of the epiphytic bacteria resulted in significant increases in numbers of E coli O157:H7 at 10 degrees C and was associated with decreased expression of E. coli O157:H7 virulence (stxA, curli, eaeA) and stress response (rpoS, sodB) genes. In conclusion, storage temperature and time of storage of packaged spinach affected the diversity of the epiphytic spinach microbiota which influenced the growth, establishment, physiology and potentially virulence of E. coli O157:H7.

Tomatoes have been associated with numerous outbreaks of salmonellosis in recent years. Trace-backs suggest tomato fruits may become contaminated during preharvest. The objective of this study was to determine the potential for Salmonella enterica serotype Newport to be internalized into the roots, stems, leaves, and fruit of red round tomato plants through contaminated irrigation water at various stages of plant development. Tomato plants were irrigated with 250 or 350 mL (depending on growth stage) of 7 log CFU·mL−1 S. Newport-contaminated irrigation water every 7 days. Roots, stems, leaves, and two tomato fruit from plants irrigated with S. Newport or water (negative control) were sampled for contamination at five stages of growth. Twenty-five of the 92 total samples taken from plants irrigated with S. Newport were confirmed positive (serovar specificity was not evaluated). Sixty-five percent of confirmed samples were roots, 40% were stems, 10% were leaves, and 6% were fruit. There was a significant difference in the presence of S. enterica according to tissue sampled (roots > stems > leaves, and fruit) (P < 0.05) and no association between growth stage and contamination (P > 0.05). Contamination of tomato fruit with S. Newport introduced through irrigation water is low because a high level of persistent contamination of a plant in the agricultural setting is unlikely.

Cinnamic acid (CA), a naturally occurring organic acid found in fruits and spices, has antimicrobial activity against spoilage and pathogenic bacteria, but low aqueous solubility limits its use. The purpose of this study was to determine the effectiveness of solubility-enhancing alpha-cyclodextrin-CA inclusion complexes against Escherichia coli O157:H7 and Salmonella enterica serovars suspended in apple cider or orange juice at two different incubation temperatures (4 and 26 degrees Celsius). Two concentrations (400 and 1,000 mg/liter) of alpha-cyclodextrin-CA inclusion complex were aseptically added to apple cider inoculated with E. coli O157:H7 (7 log CFU/ml) and orange juice inoculated with a cocktail of six Salmonella enterica serovars (7 log CFU/ml). Samples were extracted at 0 min, at 2 min, and at 24-h intervals for 7 days, serially diluted in 0.1 % peptone, spread plated in duplicate onto tryptic soy agar, and incubated at 35 degrees Celsius for 24 h. Populations of E. coli O157:H7 in apple cider were significantly reduced (Por = 0.05) during the 7-day sampling period in all solutions regardless of temperature. Compared with the controls, populations were significantly reduced by the addition of 400 and 1,000 mg/liter inclusion complex, but reductions were not significantly different (Por = 0.05) between the two treatment groups (400 and 1,000 mg/liter). Salmonella was significantly reduced in all solutions regardless of temperature. There were significant differences between the control and each inclusion complex concentration at 4 and 26 degrees Celsius. Coupled with additional processing steps, alpha-cyclodextrin-CA inclusion complexes may provide an alternative to traditional heat processes.

Currently, there is not an understanding of the project factors having a statistically significant relationship with highway construction duration. Other industry sectors have successfully used statistical regression analysis to identify and model the project parameters related to construction duration. While the need is seen for such work in highway construction, there are very few studies which attempt to identify duration-influential parameters and their relationship with the highway construction duration. The purpose of this work is to describe the highway construction data needed for such a study, identify a data source, collect early-design project data, and prepare the data for statistical regression analysis. The Virginia Department of Transportation is identified as the optimal data source. The data collected include historical contract and project level parameters. To prepare for statistical regression analysis, the contract duration collected is converted to construction duration by a seasonal adjustment process which removes historically typical nonworking days.

Gas chromatography – Olfactometry (GC-O) purifies odorants and delivers them as 1 to 2 second doses to an olfactometer where their odor properties (quale and intensity) can be studied independent of other odors. Adding an odor to the olfactometer air before combining it with the GC effluent creates an odor pedestal upon which an odorant eluting from the GC can be studied to provide insight into mixture perception. This paper describes the development and testing of a gas chromatography - pedestal olfactometer (GC-PO) that produces a Gaussian shaped distribution of one odorant in a background of constant odor composition (the pedestal).

The purpose of this research was to establish the dose of UV light (253.7 nm) needed to inactivate Listeria monocytogenes in distilled water, fresh brine (9% NaCl), spent brine, and diluted (5, 35, and 55%) spent brine, using uridine as a chemical actinometer. Strains N1-227 (isolated from hot dog batter), N3-031 (isolated from turkey franks), and R2-499 (isolated from meat) were mixed in equal proportions and suspended in each solution prepared so as to contain 10 ―4 M uridine. Samples were irradiated in sterile quartz cells for 0, 5, 10, 15, 20, 25, or 30 min. Inactivation was evaluated by serially diluting samples in 0.1 % peptone, by surface plating in duplicate onto modified Oxford agar and Trypticase soy agar with yeast extract, and by enrichment in brain heart infusion broth, followed by incubation at 37°C for 24 to 48 h. For dose measurements, the absorbance (262 nm) was measured before and after imadiation. Differences were observed in population estimates depending on the solution (P ≤ 0.05). Reductions were as follows from greatest to least: water > fresh brine > 5% spent brine > 35% spent brine > 55% spent brine > undiluted spent brine. UV light did not significantly reduce populations suspended in spent brine solutions. L. monocytogenes decreased to below the detection limit (1 log CFU/ml) at doses greater than 33.2 mJ/cm 2 in water and at doses greater than 10.3 mJ/cm 2 in fresh brine. Knowledge of UV dosing required to control L. monocytogenes in brines similar to those used for ready-to-eat meat processing will aid manufacturers in establishing appropriate food safety interventions for these products.