bluuebunny/crossref_metadata_2025_split huggingface dataset:
PSV-15 Effect of functional amino acids and fiber on growth performance of post-weaning pigs
Authors: Vega Caroline Gonzalez , Walston Stephanie , May Sabrina , Hu Qiong , Faris Richard 
Published: May 2024

Abstract
This study evaluated the effect of increasing levels of functional amino acids (FAA), including Met, Thr, and Trp with 1.4% standardized ileal digestible (SID) Lys on performance and the effect of high levels of fiber when high levels of FAA combined. A total of 216 pigs [21 d old; 6.46 ± 0.63 kg body weight (BW)] were allotted to one of 6 treatments with 3 pigs of single sex per pen, and 12 replicates/treatment. Treatments were: 1) Control basal diet (BD), 2) BD + 23% more Met+Cys (HMet), 3) BD + 22% more Thr (HThr), 4) BD + 20% more Trp (HTrp), 5) BD + 20% more Met, Thr, and Trp (HFAA, with 9% NDF and 4%ADF), 6) HFAA+ high fiber (27% NDF and 18% ADF in diet by adding soy hulls at expense of corn, HFAA+HF). The experiment lasted for 42 d and pigs were fed experimental diets for 21 d followed by a common diet for the last 21 d. Pigs fed HFAA+HF diet were initially fed HFAA diet for the first 8 d and followed by HFAA+HF diet for the next 13 d, and fed the common diet during the last 21 d. On d 0, 9, 21, and 42, BW and feed intake were recorded, and fecal scores (1 as normal to 4 as watery diarrhea) were assessed during the trial. Data were analyzed using the lme4 package of R 4.1.2, and the statistical models included the fixed effect of treatment and random effect of sex and BW block. Growth performance data were analyzed as single factor ANOVA, whereas stool quality was analyzed using ordinal model. Contrasts were used to test the effects of FAA (by comparing treatments 2, 3, 4, and 5 to BD) and fiber (by comparing HFAA+HF to HFAA). Pigs fed HFAA had reduced (P &lt; 0.05) average daily gain (ADG) and average daily feed intake (ADFI) from d 21 to 42 and tended (P &lt; 0.10) to have reduced overall ADG compared with BD (Table 1). Increasing individual amino acids did not affect performance, with the exception that pigs fed HTrp tended (P &lt; 0.10) to have increased gain to feed ratio (G:F) from d 21 to 42 compared with BD. Greater fiber content did not affect ADG or ADFI; however, it reduced (P &lt; 0.05) G:F during the whole trial compared with HFAA. Treatment did not influence stool quality. In conclusion, combination of increased amounts of Met, Thr, and Trp with SID 1.4% Lys under non-disease challenged conditions resulted in a reduction of performance, but this was not the case with increased individual amino acids, and increased fiber content with increased FAA which reduced feed efficiency of pigs.
PSV-19 Impact of precision feeding and bump feeding strategy during gestation on the performance of post-weaning pigs
Authors: Pierre Carole , Cloutier Laetitia , Galiot Lucie , Guay Frédéric 
Published: May 2024

Abstract
The objective of this study was to evaluate the post-weaning growth performance of piglets from sows of parities 1 to 3 fed with 4 different feeding programs during gestation; Flat feeding (FF, constant concentration and feed intake), Bump feeding (BF, constant concentration and variable feed intake), precision feeding by parity (PFP, variable concentration and variable feed intake using the average weight per parity), individual precision feeding (PFI, variable concentration and variable feed intake using the weight of each sow at breeding). At weaning of each parity, five litters from each of the dietary treatments were selected and five average piglets from each of these litters were transferred to a nursery building with 20 pens. All pens received the same feeding program in 3 phases of 14 d each. Piglets were weighed at the beginning and end of each feeding phase. The quantity of feed was noted for each phase. At the end of phases 1 and 3, one piglet per pen was scanned on the DXA to assess its body lean, fat, and bone mineral composition. During phase 1, average daily gain (ADG) was greater for piglets from parity 1 sows than those from parity 2 and 3 while average daily feed intake (ADFI) and feed conversion (FC) were greater for piglets from parity 3 sows (P &lt; 0.05; Table). Dietary treatments during gestation did not affect performances in phase 1. In phase 2, ADG and ADFI were greater while FC was decreased for piglets from sows of parity 2 and 3 (P&lt; 0.001). Piglets from FF treatment had a greater ADG and a lesser FC (P &lt; 0.05) than piglets from BF, piglets from PFP and PFI being intermediate. In phase 3, piglets from parity 2 sows and those from FF treatment had greater ADG and ADFI than piglets from PFI treatment, piglets from PFP and BF treatments being intermediate (P &lt; 0.005). For all post-weaning period, piglets from parity 2 sows had greater ADG, ADFI and body weight at 42 d (P &lt; 0.001) while piglets from the FF treatment had better ADG and weight at 42 d (P &lt; 0.05) than those from BF and PFI (P &lt; 0.05), PFP being intermediate. The lean ADG was greater for piglets from FF treatment (P &lt; 0.021) than piglets from PFI, piglets from BF and PFP being intermediate. Piglets from sows of parity 2 and 3 had also greater lean ADG (P &lt; 0.001). Fat ADG was also higher for piglets from parity 2 sows (P &lt; 0.010) than piglets from parity 1 sows, piglets from parity 3 sows being intermediate. Piglets from parity 2 sows clearly had better post-weaning performances. The FF treatment during gestation led to better post-weaning performance, suggesting that energy or nutrient intake in early gestation affects offspring growth and development in post-weaning period.
PSV-17 Glycerol monolaurate improves litter performance and modifies milk composition when fed to lactating sows
Authors: Risley Chad , Lopez Johnny , Cordts Christian , von Brandestein Fiona 
Published: May 2024

Abstract
Glycerol monolaurate (GML) has proven antibacterial, antiviral and anti-inflammatory properties, and additionally has been shown to increase milk immunoglobulins and improve gut health. However, limited information is available on how feeding GML to the sow prior and during lactation can influence the performance of the nursing pig. The objective of this study was to determine if feeding GML to sows would help maintain body condition, increase lauric acid in milk and improve litter performance. A total of 50 sows were randomly assigned to either a control feed or to a control feed with 1.5 kgs/mT of GML (LipoVital GL-90) 3 to 5 dbefore farrowing. Sow and litter performance was measured until weaning at 25 d. On d 1, piglets were cross-fostered within treatment and weighed. Creep feed was offered. Milk samples were taken from 5 randomly selected sows per treatment on d 3 and 25. Glycerol monolaurate had no effect on number of pigs born alive, born dead, stillborn, or number weaned (P &gt; 0.20). No treatment differences (P &gt; 0.20) were observed for sow feed intake, loss of backfat thickness or body weight losses during the study. Control piglets tended to consume more creep feed than GML piglets (P &lt; 0.15). Starting body weight was less for GML piglets (P &lt; 0.001). Despite the decreased starting body weight, weaning weight was not different between treatments (P &gt; 0.20). Using starting body weight as a covariate, total body weight gain tended to be greater (P &lt; 0.08) for GML piglets than the control piglets (5.01 kgs vs 4.89 kg, respectively). Glycerol monolaurate-fed pigs in the bottom quartile of starting body weights (&lt; 1.3 kgs) numerically out gained their control counterparts (4.67 kgs vs 4.12 kgs). Milk from GML sows had 57% more lauric acid on d 3 (P &lt; 0.05) and 124% more lauric acid at weaning compared with control sows (P &lt; 0.05). In conclusion, GML maintained sow body condition, increased the content of lauric acid in milk and improved piglet body weight gain, especially in lighter body weight piglets. The results from this study demonstrate the application of GML in commercial sow herds will be beneficial to both sow and litter.
PSV-18 Improved performance of PRRSV challenged pigs fed 1-α-glycerol monolaurate
Authors: Risley Chad , Lopez Johnny , Cordts Christian 
Published: May 2024

Abstract
Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) and Porcine Enteric Diarrhea (PEDV) has posed a persistent challenge to the swine industry despite vaccinations and biosecurity measures. Feed has been shown to be a carrier for bacterial and viral pathogens (Dee et al., 2020). Feed mitigation using medium chain fatty acids can eliminate the pathogen or reduce the pathogen load below its infectious dose. However, less is known regarding the application of monoglycerides for feed mitigation. The objective of this study was to determine if using only 1-α-glycerol monolaurate (GML) can be an effective feed mitigant against PRRSV compared with untreated control feed. A total of 2 rooms, each with 100 pigs per room, and 6 pens per room were used. The initial body weight of the pigs averaged 15 kg and were sourced from a herd free of PRRSV and PEDV. GML was added to the feed at 2 kg/mT. The study period was 14 d with starting and end body weights measured. An ice block viral challenge as described by Dee et al. (2020) was used. Briefly, a 500 mL ice cube containing 1x107 50% tissue culture infectious dose of each virus [PRRSV, PEDV and Senecavirus A (SVA)] was added to 1,300 kg of feed on d 0 and again on d 6. On d 15 pigs were tested for PRRSV (serum), PEDV (rectal swabs) and SVA (tonsil samples). Control and GML fed pigs did not seroconvert to PEDV and SVA, therefore, only results for PRRSV are presented. Average daily gain was significantly improved in GML fed pigs (0.50 kg/d vs 0.20 kg/d; P &lt; 0.05). Percentage of PRRSV positive feed samples were decreased (P &lt; 0.05) in GML-treated feed from 100% (Ct = 32.2) in control feed to 33% (Ct = 34.3). The percentage of positive oral fluid samples decreased (P &lt; 0.05) from 100% (Ct = 26.1) in control pigs to 17.0% (Ct = 33.0) in GML fed pigs. GML fed pigs exhibited no clinical signs of PRRS (dysponea), whereas 100% of the control pigs had clinical signs (P &lt; 0.05). Similarly, GML fed pigs had no PRRSV positive serum samples but 100% of the control pigs had PRRSV positive serum samples. Results from this study show that the use of only GML can be an effective feed mitigant to reduce or eliminant the clinical signs of PRRS in pigs and maintain growth performance.
PSV-20 Mycotoxin contamination trends in United States corn grain: 2019-2023
Authors: Gott Paige N , Zheng Lan , Corray Shelby , Pender Chasity , Hough Sara , Levy April 
Published: May 2024

Abstract
Mycotoxins are secondary fungal metabolites which may affect animal health, reproduction, and performance. These naturally occurring toxic metabolites are found in a variety of feedstuffs worldwide. Classic signs of mycotoxicosis in livestock can include reduced feed intake, diarrhea, and vomiting. Consideration of clinical signs alone will underestimate the true impact of mycotoxins on animals as inflammation, decreased nutrient digestibility, impaired gut integrity, and altered immune responses have also been associated with mycotoxin exposure. The objective of this study was to compare mycotoxin contamination levels of the 2023 corn crop with previous year trends. Samples were analyzed utilizing the liquid chromatography with tandem mass spectrometry (LC-MS/MS) method for six major mycotoxin groups: aflatoxins (Afla), type A trichothecenes (A-Trich), type B trichothecenes (B-Trich), fumonisins (FUM), zearalenone (ZEN), and ochratoxin A (OTA). Statistical analyses were performed with JMP Pro 16 software using one-way ANOVA and means were separated using Tukey’s HSD with significance reported at P ≤ 0.05. A limited number of 2023 samples were screened by time of abstract submission (n = 37); therefore, the contamination profile of this crop year will likely change as the sample pool expands and includes more samples originating from the Midwest. Contamination levels in corn for the tested toxin groups have remained consistent over the survey period. To date, 100% of the samples evaluated contained at least one mycotoxin, compared with 91% that was observed in 2022. Aflatoxin occurrence was numerically greater in 2023 corn compared with previous harvest years (27 vs. 11, 7, 5, and 3%, 2022 through 2019, respectively) while Afla mean contamination levels were similar across the study period (P &gt; 0.05). The occurrence of FUM in 2023 corn was also numerically the greatest (97 vs. 79, 64, 64, and 78%, 2022 through 2019, respectively) and mean FUM contamination levels did not differ across the study period (P &gt; 0.05). Occurrence of A-Trich was numerically increased in 2023 vs. 2022 (22 vs. 3%) but mean contamination level of positive samples for A-Trich was significantly less (P &lt; 0.05) in 2023 vs. 2019 (21 vs. 330 parts per billion) and did not differ from other years in the study. The occurrence of B-Trich was numerically less in 2023 vs. 2022 (35 vs. 68%) while B-Trich mean contamination levels were similar across the study period (P &gt; 0.05). Preliminary results of the 2023 US corn grain survey indicate mycotoxin occurrence is numerically increased while mean contamination levels are similar for most mycotoxin groups other than A-Trich. Continued surveillance is advised to assess the risk to livestock as new crop corn is fed out over the coming months.
PSV-21 Pediococcus acidilactici survives an in vitro simulated digestion
Authors: Brown Rebecca , Zheng Rui , Jacobi Sheila K 
Published: May 2024

Abstract
In the swine industry, probiotics are recognized for optimizing growth performance and production efficiency by modulating host physiology, and the response across studies is not consistent. One area of focus is probiotic mitigation of post-weaning diarrhea, and further mechanistic understanding of probiotic and host physiology could help with consistent performance outcomes. An essential attribute of a probiotic is the ability to survive the harsh environments of the gastrointestinal tract (GIT). The aim of this study was to determine if Pediococcus Acidilactici PECh3A (PA) that has been previously genome sequenced for determining gut physiology mechanisms can survive an in vitro simulated digestion. In the in vitro digestion PA concentrations that were investigated included 108, 109, and 1010 colony forming units (CFU)/mL. The in vitro digestion (n = 4/concentration) consisted of 5 phases with incubation times simulating the GIT; initial inoculation (0 h), gastric (2 h), upper intestinal (4 h), lower intestinal (9 h) and extended lower intestinal phase (9 h). For the initial inoculation concentrations of PA were added into 25 mL of sterile milk replacer representing dietary requirements of a suckling pig. In the gastric phase pepsin was added and pH was adjusted to 2.5. In the upper intestinal phase bile and pancreatin were added, along with a pH adjustment to 6.8. In the lower intestinal phase, the multi-enzyme complex consisting of carbohydrase enzymes was added and pH adjusted to 4.8. There was no addition during the extended lower intestinal phase. At each sample collection at the end of a phase 1 mL was collected from each flask. For each sample, 100 µL were serially diluted, plated on deMan, Rogosa, and Sharpe (MRS) plates, and incubated at 37°C for 24h. Survivability was determined by counting CFUs and comparing the concentration with the initial CFU/mL at 0 h and reported as percent survival (%S). Data for the in vitro digestion were analyzed according to a randomized complete block design (RCBD) in a split plot using the Repeated Measures Glimmix Procedure of SAS. Additional orthogonal contrasts were analyzed across PA concentrations. Data showed survival for 108,109, and 1010CFU/mL at all sample phases (108 - 44.24, 60.14, 58.36, 55.69%S; 109 - 40.56, 55.60, 49.35, 50.7%S; 1010 - 32.98, 52.55, 46.72, 43.71%S ± 2.98 respectively; phase P &lt; 0.01 and concentration P &lt; 0.01). There is evidence of a phase and concentration effect on survivability, but no interaction. A linear concentration response was observed across concentrations (54.61, 49.05, 43.99%S ± 1.23; P &lt; 0.05) indicating that as concentration increases the survivability decreases. These findings indicate that PA PECh3A can survive a simulated GIT and potentially impact swine intestinal physiology.
PSVI-7 A traceable signature for a recovery microbiome composition after a dysbiosis caused by a sanitary challenge in pigs
Authors: Brandao Melo Antonio Diego Brandão , da Valini Graziela Alves Cunha , Gomes-Neto João Carlos , de Oliveira Marllon José Karpeggiane , Marçal Danilo Alves , Arnaut Pedro Righetti , França Ismael , Korth Nate , Pavlovikj Natasha , Htoo John K , Brand Henrique Gastmann , Benson Andrew K , Hauschild Luciano 
Published: May 2024

Abstract
Recent insights continue to point to a causal role of the gastrointestinal (GI) microbiome in digestion, nutrient absorption, and host metabolism. The GI microbiome may be a frequent target of perturbation since some challenges (i.e., high density, temperature and air quality fluctuations, presence of endemic enteric pathogens) faced by pigs may altogether create a spectrum of contrasting sanitary conditions. Therefore, our study investigated the influence of increased dietary tryptophan, threonine, and methionine supplementation in pigs from “good” vs. “poor” sanitary conditions, on the GI microbiome over time. For that purpose, female growing pigs were randomly assigned in a 2 × 2 factorial design (n = 30/treatment), consisting of two sanitary conditions (“good” vs. “poor”) and two diets [control (CN) vs. supplemented with specific amino acids (Trp, Thr, and Met+Cys:Lys ratios increased to 20% greater than CN]. Pigs allocated to the “good” sanitary condition treatment were sham-inoculated with pure BHI broth and the barn was cleaned twice a day and disinfected once a week. Whereas, “poor” sanitary condition comprised of all pigs being inoculated with 2 x 109 CFU of Salmonella Typhimurium (ST), in addition to spreading fecal material from a commercial farm under sanitary challenge, followed by leaving the barn uncleaned throughout the study (poor + ST). Fecal samples (n = 11) were collected at day post-challenge (DPC) 0, 10, and 21, and were sequenced for 16S rRNA data analysis of community diversity (alpha and beta) and taxonomic changes over time. Our results demonstrated that both alpha (Shannon and Simpson) and beta diversity metrics were significantly altered at DPC 21 by differentiating “good” vs “poor + ST” treatments, despite amino acids supplementation in the diet. Bacterial taxonomic analysis further captured community level alterations by a marked dysbiosis occurring on pigs allocated under “poor + ST” sanitary conditions. “ST + poor” sanitary conditions altered community structure as measured by co-occurrence networks, which was particularly pointed out at DPI 21. Specifically, Clostridium sensu stricto 1, Intestinibacter, Rombustsia, Terrisporobacter, and Megasphaera were five taxa between others co-enriched in fecal samples from pigs allocated under “poor + ST” sanitary conditions at DPC 21. These putative SCFA-producing bacteria were positively straighter correlated between them (Figure 1), which suggests a traceable signature for a recovery microbiome composition after a dysbiosis. In conclusion, temporal changes in fecal swine microbiome of growing pigs may be reflective of sanitary status despite dietary supplementation of specific amino acids.
PSVI-11 Effects of S-Abscisic Acid administration on the antioxidative status and glucose absorption in the gut of rats
Authors: Shinzato Izuru , Kojo Hiroshi , Matsui Daisuke , Tonoue Tsuyoshi , Tsukahara Takamitsu 
Published: May 2024

Abstract
S-Abscisic Acid (S-ABA) is known to show various physiological functions in plants, but little information is available regarding the role of S-ABA in animals. Two experiments were conducted to investigate the effects of S-ABA administration on the antioxidative status and the function of the gut in rats. In the Experiment 1, male 5-wk-old Sprague-Dawley (SD) rats (n = 40) were randomly divided into the four groups. All groups were fed a common basal diet (MF, Oriental Yeast Co., Ltd., Tokyo, Japan). After a week of acclimation, either saline (CON) or S-ABA at 0.002 (LOW), 0.02 (MID), or 0.2 (HIGH) mg/kg body weight (BW) was administered intragastrically for 14 d. On d 14, all rats were weighed and euthanized for collection of plasma and gut mucosal tissues. The plasma concentration of superoxide dismutase (SOD) and the content of glutathione in a reduced (GSH) and an oxidized (GSSG) form in the gut mucosa was determined. The BW gain during the experimental period was significantly greater for LOW, MID and HIGH than for CON (P &lt; 0.01). The plasma SOD concentration did not differ among the treatments. The mucosal GSH was greater for LOW, MID and HIGH than for CON (P &lt; 0.01). In the Experiment 2, male 4-week-old SD rats (n = 36) were randomly allotted into three groups. The control (CON) was fed the AIN-93G diet while the other two groups received the diet supplemented with either 1 ppm (LOW) or 5 ppm (HIGH) S-ABA. The experimental diets were fed for 56 d. On d 21, 4 rats per treatment were employed for the intraperitoneal glucose tolerant test (IPGTT). The remainder of the animals were euthanized on d 56 for determination of the content of GSH and GSSG in the gut mucosa, the glycogen content in the liver, and the serum insulin concentration. There was no significant difference in the BW gain during the experimental period. In the IPGTT, HIGH showed greater blood glucose concentrations than CON (P &lt; 0.05) at 30 and 60 min after administration. Although there was no statistical significance, the mucosal GSH was numerically greater (P = 0.11) for HIGH than for CON or LOW. The liver glycogen or serum insulin did not differ among the treatments. Those results suggest that dietary S-ABA supplementation could improve the antioxidative status through stimulating the GSH production in the gut and consequently increase the absorption of glucose in animals. Although S-ABA was indicated to be beneficial in animals, further investigations are required to verify the practical benefits of feeding S-ABA to production animals.