181 Utilization of the Nutrack Livestock Monitoring System to Identify Changes in General and Spatial Behaviors of Newly Weaned Nursery Exposed to an Endotoxin Challenge

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 2-2
Author(s):  
Aaaron J Holliday ◽  
Benny E Mote ◽  
Eric Psota ◽  
Lindsey E Hulbert ◽  
Majid Jaberi-Douraki ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Data Capture ◽  
Continuous Data ◽  
Saline Injection ◽  
Treatment Control ◽  
Weaned Pigs ◽  
Endotoxin Challenge ◽  
E Coli ◽  
Lps Challenge ◽  
Spatial Behaviors

Abstract Incorporation of precision livestock technology has the potential to provide swine producers with the means to rapidly and accurately identify immune-compromised pigs, allowing for accurate and timely interventions. The objective of this study was to utilize the NUtrack System (NUtrack) to identify changes in general (lying, standing and sitting) and spatial behaviors (at the feeder and meters/day) of newly weaned pigs exposed to a lipopolysaccharide (LPS) challenge. To achieve this objective, 12 nursery pens with 192 weaned pigs (16 pigs/pen) were randomly assigned to three treatments (4 pens/treatment): Control (saline injection), Mixed (8 pigs/pen received an LPS challenge and 8 pigs received saline injection) and 100% (all pigs received LPS). The LPS challenge consisted of a bolus subcutaneous injection at 300 µg/kg BW (E. coli O111:B4). Prior to placement, NUtrack was installed above the 12 nursery pens and initiated continuous data capture for the duration of the nursery phase (43 days). Ten days after placement in the nursery pens pigs received the assigned challenge (LPS or sham). Data were analyzed using the MIXED procedure of SAS specific for repeated measures (SAS Inst. Inc., Cary, NC). Regardless of treatment group, general special behaviors were similar (P = >0.28) prior to the LPS challenge (days 1–9). Following LPS challenge (day 10), spatial behaviors decreased (P = <0.01) and time associated with general behaviors increased (P = <0.01) for LPS challenged pigs when compared to pigs not challenged (Control and 50% non-challenged). This change in both general and spatial behaviors remained until day 12. In addition, general and spatial behaviors of the 50% treatment (challenged and non-challenged) were different (P = < 0.03), when compared to Controls. Results suggest precision livestock technology, like the NUtrack System, has the potential to monitor changes in behaviors following an endotoxin challenge.

PSXV-27 Late-Breaking: Evaluation of antioxidant capacity in receiving beef calves challenged with lipopolysaccharide (LPS)

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 381-382
Author(s):  
Samantha N Barker ◽  
Treylr Jackson ◽  
John Richeson ◽  
Jeff A Carroll ◽  
Nicole C Burdick-Sanchez ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Capacity ◽  
Repeated Measures ◽  
Colorimetric Assay ◽  
Post Challenge ◽  
Antioxidant Power ◽  
Blood Samples ◽  
Endotoxin Challenge ◽  
Beef Calves ◽  
Lps Challenge

Abstract The objective of this study was to evaluate antioxidant capacity in plasma of beef calves challenged with LPS. Following an initial feeding period of 40 d, steers (n = 32; 379 kg ± 30.7) were transported to the Livestock Issues Research Unit’s Bovine Immunology Research and Development Complex and challenged intravenously with LPS (0.25 µg/kg BW) on d 41. Blood samples were collected via jugular catheter at -2, 0, 2, 4, 6, 8, 10, 12, 18, 24, 36 and 48 h relative to the LPS challenge at 0 h. Blood samples were processed to isolate plasma for indicators of oxidative stress with a colorimetric assay to determine ferric reducing antioxidant power (FRAP) values via concentration of ferrous iron (µM). Data were analyzed as repeated measures using the GLIMMIX procedure of SAS. Antioxidant values did vary with time (P < 0.001) being greater (P < 0.05) at -2, 0, 2, 36, and 48 h. Antioxidant capacity was reduced at 6 and 8 h (P < 0.05), with the least FRAP value observed at 8 h post-challenge. Antioxidant capacity increased (P < 0.05) again at 10 h, showing similar (P > 0.05) concentrations to those observed at 4 h. By 24 h post-challenge, plasma FRAP values increased (P < 0.05) similar to initial values at -2, 0, and 2 h. It can be inferred that oxidative stress contributes to reduced antioxidant capacity, ultimately interfering with animal growth and productivity. While these values reflect the oxidative stress response to an acute endotoxin challenge, and a subsequent recovery returning to homeostasis within 24 to 48 h, they may also correlate with other physiological and immunological indicators associated with an acute endotoxin challenge.

scholarly journals Effects of Long Chain Omega-3 Fatty Acid Supplementation on the Lipoprotein Oxylipin Response to an Inflammatory Challenge in Humans (P08-127-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Rachel Walker ◽  
Chesney Richter ◽  
Ann Skulas-Ray ◽  
Penny Kris-Etherton ◽  
Gordon Jensen ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Inflammatory Responses ◽  
Ethyl Esters ◽  
Time Dependent ◽  
Omega 3 ◽  
Endotoxin Challenge ◽  
State College ◽  
Funding Sources ◽  
Lps Challenge ◽  
Penn State

Abstract Objectives Oxylipins are derived from polyunsaturated fatty acids (PUFAs) and mediate inflammatory responses, but the time-dependent response of oxylipins to an acute inflammatory challenge in humans is unknown. Although omega-3 acid ethyl esters (O3EEs) reduce plasma triglycerides, it is unclear whether they alter the response of oxylipins in triglyceride rich lipoproteins (TGRLs). We investigated the effect of 3.4 g/d O3EEs on the oxylipin response to an inflammatory challenge. Methods Healthy young men (N = 16) received either placebo or 3.4 g/d O3EEs for 8–12 weeks in a crossover study design. After each treatment period, subjects underwent a low-dose endotoxin challenge (0.6 ng lipopolysaccharide (LPS)/kg body weight). Plasma samples were collected at baseline and 1, 2, 4, 8, 24, 48, 72, and 168 hours after LPS injection. TGRLs were separated from plasma, and esterified oxylipins were hydrolyzed and quantified by LC-MS/MS. Changes over time were assessed by the use of mixed models with repeated measures. Data is reported as mean (95% CI). Results The peak total oxylipin response occurred at 4 hours after LPS injection, with the exception of hydroxyeicosatetraenoic acids (HETEs). Regardless of treatment, the peak concentration of HETEs occurred at 2 hours. This timing differed from that of hydroxyoctadecadienoic acids (HODEs), which peaked at 4 hours (P = 0.004). Of the omega-3 derived oxylipins, O3EE treatment significantly increased hydroxyeicosapentaenoic acids (HEPEs) by 356% (133%, 792%), hydroxydocosahexaenoic acids (HDoHEs) by 172% (34%, 452%), and epoxydocosapentaeinoic acids (EpDPEs) by 316% (76%, 887%) compared to placebo at 4 hours after LPS challenge (P < 0.007). Additionally, O3EE treatment also significantly altered the timing of the HEPE response (pinteraction = 0.004). Conclusions The time-dependent TGRL oxylipin response to inflammatory challenge differs according to oxylipin class, and the timing and magnitude of the response can be altered by O3EE treatment. This is may be a molecular explanation of the anti-inflammatory and pro-resolving effects of O3EEs. Funding Sources Pronova BioPharma; Penn State Clinical & Translational Research Institute, NIH/NCATS Grant # UL1 TR000127; Penn State College of Health and Human Development. Supporting Tables, Images and/or Graphs

scholarly journals 81 Effects of NeutraPath™ on growth performance, diarrhea and fecal-hemolytic coliforms of weaned pigs challenged with an enterotoxigenic Escherichia coli

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 4-5
Author(s):  
LeAnn Johnston ◽  
Peng Ji ◽  
Hongyu Xue
Keyword(s):  
Growth Performance ◽  
Repeated Measures ◽  
Area Under The Curve ◽  
Enterotoxigenic Escherichia Coli ◽  
Post Inoculation ◽  
Weaned Pigs ◽  
E Coli ◽  
Severe Diarrhea ◽  
Diarrhea Incidence ◽  
And Gender

Abstract This study was aimed to investigate NeutraPath’s effects on performance, diarrhea, and fecal β-hemolytic coliforms of weaned pigs infected with enterotoxigenic E. coli (ETEC). NeutraPath, a blend of essential oils, fatty acids and toxin-adsorbing minerals has bacteriostatic/bactericidal effects. Thirty-six weanling pigs (21 d old; average BW 6.88 kg; 18 barrows, 18 gilts) blocked by weight and gender, were assigned to one of three dietary treatments in an RCB (1 pig/pen; 12 replicates/treatment). Treatments were control or dietary supplementation with 0.25% or 0.50% NeutraPath. This study lasted 28 d with 7 d before and 21 d after the first E. coli inoculation (d 0). All pigs were orally inoculated with 1010 cfu F18+ ETEC/3-mL dose for 3 consecutive d. Growth performance data was obtained on d 0, d 7, d 14 and d 21 post-inoculation (PI). On d 2 PI, fecal samples were obtained and plated on blood and MacConkey agars to determine total coliforms and β-hemolytic coliforms. Treatment effects were analyzed using one-way ANOVA or repeated measures ANOVA followed by post hoc Tukey’s test. The 0.5% NeutraPath treatment resulted in a 12.7% and a 14.0% increase (P &lt; 0.05) in BW (relative to initial BW at d 0 PI) at d 7 PI and d 21 PI, respectively. Pigs fed either NeutraPath dose had greater overall growth during the 28-d period (P&lt; 0.05) producing improvements in feed efficiency during d 14-21 PI (P&lt; 0.05). Feeding 0.25% NeutraPath improved (P &lt; 0.05) diarrhea kinetics d 0-11 PI, Diarrhea score (DS) area under the curve for d 0-11 and d 0-21 PI, moderate (DS≥3) and severe (DS≥4) diarrhea incidence and tended (P=0.08) to lower the percentage of fecal β-hemolytic coliforms compared to control. In conclusion, NeutraPath supplementation can enhance growth performance and decrease incidence of severe diarrhea in weaned pigs challenged with F18+ ETEC.

scholarly journals PSIV-11 Effects of very low-dose antibiotics on gene expression profiles in ileal mucosa of weaned pigs infected with a pathogenic E. coli

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 286-286
Author(s):  
Kwangwook Kim ◽  
Sungbong Jang ◽  
Yanhong Liu
Keyword(s):  
Gene Expression ◽  
Systemic Inflammation ◽  
Low Dose ◽  
Expression Profiles ◽  
Gene Expression Profiles ◽  
Post Inoculation ◽  
Growth Promoter ◽  
Weaned Pigs ◽  
Ileal Mucosa ◽  
E Coli

Abstract Our previous studies have shown that supplementation of low-dose antibiotic growth promoter (AGP) exacerbated growth performance and systemic inflammation of weaned pigs infected with pathogenic Escherichia coli (E. coli). The objective of this experiment, which is extension of our previous report, was to investigate the effect of low-dose AGP on gene expression in ileal mucosa of weaned pigs experimentally infected with F18 E. coli. Thirty-four pigs (6.88 ± 1.03 kg BW) were individually housed in disease containment rooms and randomly allotted to one of three treatments (9 to 13 pigs/treatment). The three dietary treatments were control diet (control), and 2 additional diets supplemented with 0.5 or 50 mg/kg of AGP (carbadox), respectively. The experiment lasted 18 d [7 d before and 11 d after first inoculation (d 0)]. The F18 E. coli inoculum was orally provided to all pigs with the dose of 1010 cfu/3 mL for 3 consecutive days. Total RNA [4 to 6 pigs/treatment on d 5; 5 to 7 pigs/treatment on 11 post-inoculation (PI)] was extracted from ileal mucosa to analyze gene expression profiles by Batch-Tag-Seq. The modulated differential gene expression were defined by 1.5-fold difference and a cutoff of P &lt; 0.05 using limma-voom package. All processed data were statistically analyzed and evaluated by PANTHER classification system to determine the biological process function of genes in these lists. Compared to control, supplementation of recommended-dose AGP down-regulated genes related to inflammatory responses on d 5 and 11 PI; whereas, feeding low-dose AGP up-regulated genes associated with negative regulation of metabolic process on d 5, but down-regulated the genes related to immune responses on d 11 PI. The present observations support adverse effects of low-dose AGP in our previous study, indicated by exacerbated the detrimental effects of E. coli infection on pigs’ growth rate, diarrhea and systemic inflammation.

187 Effects of Oligosaccharide-based Polymer on Growth Performance, Diarrhea, and Fecal β-hemolytic Coliforms in Weanling Pigs Experimentally Infected with a Pathogenic E. coli

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 90-90
Author(s):  
Kwangwook Kim ◽  
Yijie He ◽  
Cynthia Jinno ◽  
Seijoo Yang ◽  
Xunde Li ◽  
...  
Keyword(s):  
Growth Performance ◽  
Feed Efficiency ◽  
Basal Diet ◽  
Watery Diarrhea ◽  
Experimental Unit ◽  
Post Inoculation ◽  
Weaned Pigs ◽  
E Coli ◽  
Diet Control ◽  
Dietary Treatments

Abstract The objective of this experiment was to investigate dietary supplementation of oligosaccharide-based polymer on growth performance, diarrhea, and fecal β-hemolytic coliforms of weaned pigs experimentally infected with a pathogenic F18 Escherichia coli (E. coli). Forty-eight pigs (7.23 ± 1.11 kg BW) were individually housed in disease containment rooms and randomly allotted to one of four treatments with 12 replicate pigs per treatment. The four dietary treatments were a nursery basal diet (control), and 3 additional diets supplemented with 50 mg/kg Mecadox (AGP), 10 or 20 mg/kg of oligosaccharide-based polymer. The experiment lasted 18 d [7 d before and 11 d after the first inoculation (d 0)]. The doses of F18 E. coli inoculum were 1010 cfu/3 mL oral dose daily for 3 days. Growth performance was measured on d -7 to 0 before inoculation, and d 0 to 5 and 5 to 11 post-inoculation (PI). Diarrhea score (DS; 1, normal, to 5, watery diarrhea) was daily recorded for each pig. Fecal samples were collected on d 2, 5, 8, and 11 PI to test the percentage of β-hemolytic coliforms in total coliforms. All data were analyzed by ANOVA using the PROC MIXED of SAS with pig as the experimental unit. Inclusion of oligosaccharide-based polymer linearly increased (P &lt; 0.05) ADFI on d 0 to 5 PI, and feed efficiency on d 0 to 5 PI and d 5 to 11 PI (P = 0.07), compared with the control. Supplementation of AGP or oligosaccharide-based polymer reduced (P &lt; 0.01) frequency of diarrhea of pigs from d 0 to 11 PI. No differences were observed in overall growth performance and percentage of fecal β-hemolytic coliforms on d 8 PI among pigs in AGP and oligosaccharide-based polymer treatments. In conclusion, supplementation of oligosaccharide-based polymer enhanced feed efficiency and reduced diarrhea of weaned pigs infected with a pathogenic E. coli.

scholarly journals Epigenetic regulation of innate immune memory in microglia

2021 ◽  
Author(s):  
Xiaoming Zhang ◽  
Laura Kracht ◽  
Antonio M Lerario ◽  
Marissa L Dubbelaar ◽  
Nieske Brouwer ◽  
...  
Keyword(s):  
Gene Networks ◽  
Accelerated Aging ◽  
Genotoxic Stress ◽  
Immune Memory ◽  
Long Term Memory ◽  
Epigenetic Marks ◽  
Endotoxin Challenge ◽  
Lps Challenge ◽  
Inflammatory Stimuli ◽  
Dna Repair Deficiency

Microglia are the tissue-resident macrophages of the CNS. They originate in the yolk sac, colonize the CNS during embryonic development and form a self-sustaining population with limited turnover. A consequence of their relative slow turnover is that microglia can serve as a long-term memory for inflammatory or neurodegenerative events. We characterized the epigenomes and transcriptomes of microglia exposed to different stimuli; an endotoxin challenge (LPS) and genotoxic stress (DNA repair deficiency-induced accelerated aging). Whereas the enrichment of permissive epigenetic marks at enhancer regions explains training (hyperresponsiveness) of primed microglia to LPS challenge, the tolerized response of microglia seems to be regulated by loss of permissive epigenetic marks. Here, we identify that inflammatory stimuli and accelerated aging because of genotoxic stress activate distinct gene networks. These gene networks and associated biological processes are partially overlapping, which is likely driven by specific transcription factor networks, resulting in altered epigenetic signatures and distinct functional (desensitized vs. primed) microglia phenotypes.

Algae-derived β-glucan enhanced gut health and immune responses of weaned pigs experimentally infected with a pathogenic E. coli

2019 ◽  
Vol 248 ◽  
pp. 114-125 ◽  
Author(s):  
Kwangwook Kim ◽  
Amy Ehrlich ◽  
Vivian Perng ◽  
Jennifer A. Chase ◽  
Helen Raybould ◽  
...  
Keyword(s):  
Immune Responses ◽  
Gut Health ◽  
Weaned Pigs ◽  
E Coli

Centrally acting vasopressin contributes to endotoxin tolerance

1990 ◽  
Vol 258 (2) ◽  
pp. R443-R449 ◽  
Author(s):  
M. F. Wilkinson ◽  
N. W. Kasting
Keyword(s):  
Escherichia Coli ◽  
Receptor Antagonist ◽  
Arginine Vasopressin ◽  
Endotoxin Tolerance ◽  
Thermoregulatory Response ◽  
Endotoxin Challenge ◽  
E Coli ◽  
Intravenous Injections ◽  
Refractory State ◽  
V2 Antagonist

Repeated daily intravenous injections of bacterial endotoxin induce a refractory state to their usual pyrogenic effects. The neuropeptide arginine vasopressin (AVP) has been implicated in natural fever suppression and may be involved in the process of pyrogenic tolerance to intravenous endotoxin. This study was conducted to test this hypothesis. Tolerance was induced by two successive daily intravenous injections of Escherichia coli endotoxin (50 micrograms/kg) into conscious unrestrained rats. This tolerance was maintained, unaltered, after a third or fourth subsequent injection. However, bilateral administration of an AVP V1-receptor antagonist (0.43-4.3 nmol) into the ventral septal area (VSA) of the rat brain markedly enhanced the thermoregulatory response to a third or fourth endotoxin challenge compared with saline controls. The effect of the V1 antagonist was dose related. In contrast, an AVP V2 antagonist (0.43 nmol) bilaterally injected into the VSA did not affect the tolerant reaction to endotoxin. Furthermore, neither saline nor the V1 antagonist significantly affected core temperature when administered within the VSA without subsequent endotoxin. These results are consistent with the hypothesis that AVP acts as an endogenous antipyretic within the VSA during fever. Moreover, the data suggest a possible role for centrally acting vasopressin during pyrogenic tolerance to E. coli endotoxin.

scholarly journals Growth performance and gut health of Escherichia coli-challenged weaned pigs fed diets supplemented with a Bacillus subtilis direct-fed microbial

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Sangwoo Park ◽  
Jung Wook Lee ◽  
Kevin Jerez Bogota ◽  
David Francis ◽  
Jolie Caroline González-Vega ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Bacillus Subtilis ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Basal Diet ◽  
Feed Additives ◽  
Growth Promoter ◽  
Gut Health ◽  
Weaned Pigs ◽  
E Coli

Abstract This study was conducted to investigate the effects of a direct-fed microbial (DFM) product (Bacillus subtilis strain DSM 32540) in weaned pigs challenged with K88 strain of Escherichia coli on growth performance and indicators of gut health. A total of 21 weaned pigs [initial body weight (BW) = 8.19 kg] were housed individually in pens and fed three diets (seven replicates per diet) for 21 d in a completely randomized design. The three diets were a corn-soybean meal-based basal diet without feed additives, a basal diet with 0.25% antibiotics (neo-Oxy 10-10; neomycin + oxytetracycline), or a basal diet with 0.05% DFM. All pigs were orally challenged with a subclinical dose (6.7 × 108 CFU/mL) of K88 strain of E. coli on day 3 of the study (3 d after weaning). Feed intake and BW data were collected on days 0, 3, 7, 14, and 21. Fecal scores were recorded daily. On day 21, pigs were sacrificed to determine various indicators of gut health. Supplementation of the basal diet with antibiotics or DFM did not affect the overall (days 0–21) growth performance of pigs. However, antibiotics or DFM supplementation increased (P = 0.010) gain:feed (G:F) of pigs during the post-E. coli challenge period (days 3–21) by 23% and 24%, respectively. The G:F for the DFM-supplemented diet did not differ from that for the antibiotics-supplemented diet. The frequency of diarrhea for pigs fed a diet with antibiotics or DFM tended to be lower (P = 0.071) than that of pigs fed the basal diet. The jejunal villous height (VH) and the VH to crypt depth ratio (VH:CD) were increased (P &lt; 0.001) by 33% and 35%, respectively, due to the inclusion of antibiotics in the basal diet and by 43% and 41%, respectively due to the inclusion of DFM in the basal diet. The VH and VH:CD for the DFM-supplemented diet were greater (P &lt; 0.05) than those for the antibiotics-supplemented diet. Ileal VH was increased (P &lt; 0.05) by 46% due to the inclusion of DFM in the basal diet. The empty weight of small intestine, cecum, or colon relative to live BW was unaffected by dietary antibiotics or DFM supplementation. In conclusion, the addition of DFM to the basal diet improved the feed efficiency of E. coli-challenged weaned pigs to a value similar to that of the antibiotics-supplemented diet and increased jejunal VH and VH:CD ratio to values greater than those for the antibiotics-supplemented diet. Thus, under E. coli challenge, the test DFM product may replace the use of antibiotics as a growth promoter in diets for weaned pigs to improve feed efficiency and gut integrity.

scholarly journals MECHANISMS OF ENDOTOXIN TOLERANCE

1963 ◽  
Vol 117 (4) ◽  
pp. 663-674 ◽  
Author(s):  
Sheldon E. Greisman ◽  
Frank A. Carozza ◽  
J. Dixon Hills
Keyword(s):  
Phagocytic Activity ◽  
Endotoxin Tolerance ◽  
The Other ◽  
Defense System ◽  
Passive Protection ◽  
Endotoxin Challenge ◽  
E Coli ◽  
Intravenous Injections ◽  
Carbon Clearance ◽  
Tolerant Animal

Pyrogenic tolerance following 7 daily intravenous injections of 2.0 µg/kg E. coli endotoxin in albino rabbits was associated with significant increases in RES phagocytic activity as measured with colloidal carbon. Nevertheless, 4 hours after RES blockade with thorotrast (3 ml/kg), the tolerant rabbits exhibited significantly lower fever indices following intravenous endotoxin challenge than did non-tolerant control animals despite comparably depressed capacities to clear carbon from the blood. Moreover, plasma from rabbits tolerant to endotoxin induced significant tolerance in normal rabbits prepared by thorotrast blockade without enhancing the depressed carbon clearance. This passive protection extended to heterologous endotoxins. Analysis of the data indicates that RES blockade does not abolish tolerance; rather blockade resets the reactivity to endotoxin in the normal and tolerant animal, rendering both exquisitely reactive, but permitting retention of the major portion of tolerance. Apparently the tolerant animal possesses a dual endotoxin defense system. One system is abolished by thorotrast; the other is in part humoral, accounts for the greater portion of tolerance, and is thorotrast-resistant. The nature of the humoral component is not defined but is consistent with that of an opsonin with high endotoxin specificity.

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