M. Clavijo, Lucina Galina Pantoja, D. Holtkamp, P. Yeske, Clayton Johnson, Michelle Sprague, E. Fano, R. Main, Emily McDowell, T. Painter, L. Becton, David Baumert, L. Glowzenski, H. Snelson, A. Maschhoff
A standardized system for classifying the Mycoplasma hyopneumoniae status of swine breeding herds was developed by defining a set of diagnostic guidelines to determine the exposure and shedding status of herds. The classification is based on epidemiological and ecological features of M hyopneumoniae and reflects current field control and elimination practices. The classification was developed by a working group composed of representatives from academia, industry, swine practitioners, American Association of Swine Veterinarians (AASV), and the National Pork Board, and approved by the AASV Board of Directors on October 2, 2019. Clear and concise terminology will facilitate communication across all stakeholders.
{"title":"Establishing Mycoplasma hyopneumoniae herd status classification criteria for breeding herds","authors":"M. Clavijo, Lucina Galina Pantoja, D. Holtkamp, P. Yeske, Clayton Johnson, Michelle Sprague, E. Fano, R. Main, Emily McDowell, T. Painter, L. Becton, David Baumert, L. Glowzenski, H. Snelson, A. Maschhoff","doi":"10.54846/jshap/1221","DOIUrl":"https://doi.org/10.54846/jshap/1221","url":null,"abstract":"A standardized system for classifying the Mycoplasma hyopneumoniae status of swine breeding herds was developed by defining a set of diagnostic guidelines to determine the exposure and shedding status of herds. The classification is based on epidemiological and ecological features of M hyopneumoniae and reflects current field control and elimination practices. The classification was developed by a working group composed of representatives from academia, industry, swine practitioners, American Association of Swine Veterinarians (AASV), and the National Pork Board, and approved by the AASV Board of Directors on October 2, 2019. Clear and concise terminology will facilitate communication across all stakeholders.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47531923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Ruston, D. Linhares, Eli Blay, M. Nickel, K. Skoland, Heather Kittrell, Justin Brown, L. Karriker, M. Breuer, Lauren A McKeen, D. Holtkamp
Objective: Evaluate the effectiveness of a staged market pig loading procedure for reducing contaminant transfer from livestock trailers to the barn. Materials and methods: A conventional loading procedure was compared to a staged procedure, with 10 replicates each. In the staged procedure, one loadout crew member was stationed between two lines of separation and could not cross onto the livestock trailer or into the center alleyway of the barn. The remaining loadout crew members within the barn could not cross into the loadout alleyway or chute. In the conventional procedure, a loadout crew member moved pigs from the center alleyway, through the loadout alleyway, and up the chute, but did not cross onto the livestock trailer. Fluorescent powder was mixed with obstetrical lubricant and wood shavings and spread evenly on the livestock trailer floor, just inside the roll-up door that opens to the chute. After each loadout, fluorescent powder contamination was evaluated at 8 locations: one in the chute, two in the loadout alleyway, and five in the center alleyway of the barn. Results: Four of five center alleyway locations had significantly lower contamination (P < .05) for the staged protocol compared to the conventional protocol. The level of contamination at the fifth center alleyway location was not statistically different (P = .057). The contamination level at all other locations was not statistically significant between the two groups (P > .05). Implications: The staged loading procedure effectively reduced the transfer of fluorescent powder from the livestock trailer to the barn.
{"title":"Evaluation of a staged loadout procedure for market swine to prevent transfer of pathogen contaminated particles from livestock trailers to the barn","authors":"C. Ruston, D. Linhares, Eli Blay, M. Nickel, K. Skoland, Heather Kittrell, Justin Brown, L. Karriker, M. Breuer, Lauren A McKeen, D. Holtkamp","doi":"10.54846/jshap/1229","DOIUrl":"https://doi.org/10.54846/jshap/1229","url":null,"abstract":"Objective: Evaluate the effectiveness of a staged market pig loading procedure for reducing contaminant transfer from livestock trailers to the barn. Materials and methods: A conventional loading procedure was compared to a staged procedure, with 10 replicates each. In the staged procedure, one loadout crew member was stationed between two lines of separation and could not cross onto the livestock trailer or into the center alleyway of the barn. The remaining loadout crew members within the barn could not cross into the loadout alleyway or chute. In the conventional procedure, a loadout crew member moved pigs from the center alleyway, through the loadout alleyway, and up the chute, but did not cross onto the livestock trailer. Fluorescent powder was mixed with obstetrical lubricant and wood shavings and spread evenly on the livestock trailer floor, just inside the roll-up door that opens to the chute. After each loadout, fluorescent powder contamination was evaluated at 8 locations: one in the chute, two in the loadout alleyway, and five in the center alleyway of the barn. Results: Four of five center alleyway locations had significantly lower contamination (P < .05) for the staged protocol compared to the conventional protocol. The level of contamination at the fifth center alleyway location was not statistically different (P = .057). The contamination level at all other locations was not statistically significant between the two groups (P > .05). Implications: The staged loading procedure effectively reduced the transfer of fluorescent powder from the livestock trailer to the barn.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41666577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Holtkamp, M. Torremorell, C. Corzo, D. Linhares, M. Almeida, P. Yeske, D. Polson, L. Becton, H. Snelson, T. Donovan, J. Pittman, Clayton Johnson, C. Vilalta, G. Silva, J. Sanhueza
A standardized system for classifying the porcine reproductive and respiratory syndrome virus (PRRSV) status of swine herds is necessary for communication between veterinarians and producers. The 2011 classification system has been widely adopted by producers and veterinarians worldwide. In 2018, a working group met to revisit the system and make recommendations for changes. The most significant modification was to the classification of positive unstable and positive stable breeding herds. Recommended diagnostic protocols for promotion of herds to each status were modified and recommended diagnostic protocols to maintain a status were added. The growing pig classification for PRRSV was also modified.
{"title":"Proposed modifications to porcine reproductive and respiratory syndrome virus herd classification","authors":"D. Holtkamp, M. Torremorell, C. Corzo, D. Linhares, M. Almeida, P. Yeske, D. Polson, L. Becton, H. Snelson, T. Donovan, J. Pittman, Clayton Johnson, C. Vilalta, G. Silva, J. Sanhueza","doi":"10.54846/jshap/1218","DOIUrl":"https://doi.org/10.54846/jshap/1218","url":null,"abstract":"A standardized system for classifying the porcine reproductive and respiratory syndrome virus (PRRSV) status of swine herds is necessary for communication between veterinarians and producers. The 2011 classification system has been widely adopted by producers and veterinarians worldwide. In 2018, a working group met to revisit the system and make recommendations for changes. The most significant modification was to the classification of positive unstable and positive stable breeding herds. Recommended diagnostic protocols for promotion of herds to each status were modified and recommended diagnostic protocols to maintain a status were added. The growing pig classification for PRRSV was also modified.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42953668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. F. V. Superti, Andressa Pereira de Souza, Bruna Muller, Zigomar da Silva, E. Zanella, Ricardo Zinella, Mariana Groke Marques
Objective: The objective of this study was to evaluate three surgical procedures to produce intact, sterile boars. Materials and methods: Boars (n = 39) were allocated to one of four treatment groups: no surgery (control), epididymectomy by removal of the epididymis tail (TE), vasectomy via scrotal access (VS), and vasectomy via inguinal access (VI) at 63 days of age. Selected physiological, hematological, and endocrine responses were monitored after surgeries to evaluate the different techniques’ relative safety and effectiveness. Results: Libido and testosterone concentrations were not affected by surgical treatment and were similar to those observed in the control group. The TE and VS procedures required the least and most time to complete, respectively, while VI was intermediate (P < .001). Both lactate and cortisol concentrations were elevated at the time of surgery compared with the control group, but had decreased by 2 days post surgery (P = .02). Implications: Considering the surgical time and ease, the TE procedure is suggested as the choice technique for producing intact, sterile boars. The swine industry is shifting from individual crates to the use of group pen housing of sows. Use of intact, sterile boars could be implemented to improve estrus detection in group pen housing systems.
{"title":"Development of effective and minimally invasive surgical techniques for the preparation of intact, sterile boars","authors":"B. F. V. Superti, Andressa Pereira de Souza, Bruna Muller, Zigomar da Silva, E. Zanella, Ricardo Zinella, Mariana Groke Marques","doi":"10.54846/jshap/1228","DOIUrl":"https://doi.org/10.54846/jshap/1228","url":null,"abstract":"Objective: The objective of this study was to evaluate three surgical procedures to produce intact, sterile boars. Materials and methods: Boars (n = 39) were allocated to one of four treatment groups: no surgery (control), epididymectomy by removal of the epididymis tail (TE), vasectomy via scrotal access (VS), and vasectomy via inguinal access (VI) at 63 days of age. Selected physiological, hematological, and endocrine responses were monitored after surgeries to evaluate the different techniques’ relative safety and effectiveness. Results: Libido and testosterone concentrations were not affected by surgical treatment and were similar to those observed in the control group. The TE and VS procedures required the least and most time to complete, respectively, while VI was intermediate (P < .001). Both lactate and cortisol concentrations were elevated at the time of surgery compared with the control group, but had decreased by 2 days post surgery (P = .02). Implications: Considering the surgical time and ease, the TE procedure is suggested as the choice technique for producing intact, sterile boars. The swine industry is shifting from individual crates to the use of group pen housing of sows. Use of intact, sterile boars could be implemented to improve estrus detection in group pen housing systems.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42926504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objectives: To evaluate correlation between Sow Caliper measurement and backfat depth (BFD), and to determine the ideal caliper measurement that predicts optimal BFD prefarrowing to support performance of lactating sows. Materials and methods: Multiparous sows (n = 928, Parity 1-9) were group housed in pens from day 35 to 109 of gestation. Caliper measurements, BFD, visual body condition scores (BCS), and body weight were recorded upon sows’ entry and exit of gestation pens. Subsequent farrowing performance was recorded. Caliper measurements were classified into five categories: category 1 = 4.0 to 8.0 units, category 2 = 8.5 to 10.0 units, category 3 = 10.5 to 12.0 units, category 4 = 12.5 to 14.0 units, and category 5 = 14.5 to 18.0 units. Results: Caliper measurement was correlated positively with BFD (r = 0.71-0.75; P < .001) and BCS (r = 0.67-0.75; P < .001) on days 35 and 109 of gestation. Based on sow performance over one reproduction cycle and BFD recommendations, caliper category 4 on day 109 of gestation was deemed ideal for prefarrowing sows. The estimated lower and upper limits of BFD for prefarrowing sows in caliper category 4 were 15.6 and 18.0 mm, respectively. Caliper measurements explained about 55% of variation in BFD of gestating sows prefarrowing. Implications: The Sow Caliper can be used to evaluate body condition of gestating sows. To maintain body condition and reproductive performance, caliper measurements of 12.5 to 14.0 units are recommended for prefarrowing sows across parities, excluding gilts.
{"title":"Evaluation of Sow Caliper for body condition measurement of gestating sows","authors":"Yuzhi Z. Li, S. Cui, S. Baidoo, L. Johnston","doi":"10.54846/jshap/1232","DOIUrl":"https://doi.org/10.54846/jshap/1232","url":null,"abstract":"Objectives: To evaluate correlation between Sow Caliper measurement and backfat depth (BFD), and to determine the ideal caliper measurement that predicts optimal BFD prefarrowing to support performance of lactating sows. Materials and methods: Multiparous sows (n = 928, Parity 1-9) were group housed in pens from day 35 to 109 of gestation. Caliper measurements, BFD, visual body condition scores (BCS), and body weight were recorded upon sows’ entry and exit of gestation pens. Subsequent farrowing performance was recorded. Caliper measurements were classified into five categories: category 1 = 4.0 to 8.0 units, category 2 = 8.5 to 10.0 units, category 3 = 10.5 to 12.0 units, category 4 = 12.5 to 14.0 units, and category 5 = 14.5 to 18.0 units. Results: Caliper measurement was correlated positively with BFD (r = 0.71-0.75; P < .001) and BCS (r = 0.67-0.75; P < .001) on days 35 and 109 of gestation. Based on sow performance over one reproduction cycle and BFD recommendations, caliper category 4 on day 109 of gestation was deemed ideal for prefarrowing sows. The estimated lower and upper limits of BFD for prefarrowing sows in caliper category 4 were 15.6 and 18.0 mm, respectively. Caliper measurements explained about 55% of variation in BFD of gestating sows prefarrowing. Implications: The Sow Caliper can be used to evaluate body condition of gestating sows. To maintain body condition and reproductive performance, caliper measurements of 12.5 to 14.0 units are recommended for prefarrowing sows across parities, excluding gilts.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44899447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Little, J. Dunkelberger, D. Hanson, J. Eggert, M. Gonda, M. MacNeil, E. Knol, S. Dee
Our objective was to evaluate whether porcine reproductive and respiratory syndrome virus (PRRSV) vaccination improved mortality and morbidity following experimental infection with a PRRSV restriction fragment length polymorphism 1-7-4. Results indicated that mortality and morbidity were significantly lower for vaccinated pigs as compared to unvaccinated pigs (P < .001).
{"title":"Evaluation of PRRSV vaccine efficacy following infection with PRRSV 1-7-4","authors":"E. Little, J. Dunkelberger, D. Hanson, J. Eggert, M. Gonda, M. MacNeil, E. Knol, S. Dee","doi":"10.54846/jshap/1210","DOIUrl":"https://doi.org/10.54846/jshap/1210","url":null,"abstract":"Our objective was to evaluate whether porcine reproductive and respiratory syndrome virus (PRRSV) vaccination improved mortality and morbidity following experimental infection with a PRRSV restriction fragment length polymorphism 1-7-4. Results indicated that mortality and morbidity were significantly lower for vaccinated pigs as compared to unvaccinated pigs (P < .001).","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41763799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Kim, T. Oh, Siyeon Yang, K. Park, Hyejean Cho, C. Chae
Objective: Evaluate the efficacy of a new single-dose bacterin against Mycoplasma hyopneumoniae under field conditions. Materials and methods: Three separate farms were selected based on their history of enzootic pneumonia. On each farm, vaccinated pigs (n = 20; 10 male and 10 female) were administered a single dose of the M hyopneumoniae bacterin at 21 days of age while unvaccinated pigs (n = 20; 10 male and 10 female) were administered a single dose of phosphate buffered saline at the same age. Results: Vaccination against M hyopneumoniae reduces the severity of lung lesions and clinical signs such as coughing, which leads to improved growth performance of the pig. Vaccinated pigs had a significantly higher (P = .02 for farm A, P = .02 for farm B, and P = .02 for farm C) average daily weight gain between 21 to 175 days old (0 to 154 days post vaccination) and elicited cell-mediated immunity, as measured by M hyopneumoniae-specific interferon-γ secreting cells, when compared with unvaccinated pigs located at all 3 farms. Implications: The data presented in this field study demonstrated that the M hyopneumoniae bacterin improved growth performance effectively in 3 farms suffering from enzootic pneumonia.
{"title":"Field evaluation of a new single-dose Mycoplasma hyopneumoniae bacterin effects on growth performance","authors":"S. Kim, T. Oh, Siyeon Yang, K. Park, Hyejean Cho, C. Chae","doi":"10.54846/jshap/1226","DOIUrl":"https://doi.org/10.54846/jshap/1226","url":null,"abstract":"Objective: Evaluate the efficacy of a new single-dose bacterin against Mycoplasma hyopneumoniae under field conditions. Materials and methods: Three separate farms were selected based on their history of enzootic pneumonia. On each farm, vaccinated pigs (n = 20; 10 male and 10 female) were administered a single dose of the M hyopneumoniae bacterin at 21 days of age while unvaccinated pigs (n = 20; 10 male and 10 female) were administered a single dose of phosphate buffered saline at the same age. Results: Vaccination against M hyopneumoniae reduces the severity of lung lesions and clinical signs such as coughing, which leads to improved growth performance of the pig. Vaccinated pigs had a significantly higher (P = .02 for farm A, P = .02 for farm B, and P = .02 for farm C) average daily weight gain between 21 to 175 days old (0 to 154 days post vaccination) and elicited cell-mediated immunity, as measured by M hyopneumoniae-specific interferon-γ secreting cells, when compared with unvaccinated pigs located at all 3 farms. Implications: The data presented in this field study demonstrated that the M hyopneumoniae bacterin improved growth performance effectively in 3 farms suffering from enzootic pneumonia.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46384870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objective: To evaluate the effect of iron dosage given at birth on pig growth performance, the course of the preweaning and postweaning blood profile, and postweaning tissue mineral concentration. Materials and methods: Crossbred pigs (n = 70) were assigned to 1 of 5 iron dosages (0, 50, 100, 200, and 300 mg iron) administered by injection on day 0. Body weight and blood samples were collected at day 0, 1, 2, 3, 4, 6, 8, 11, 17, 22, 23, 24, 25, 29, 38, and 52. All blood samples were analyzed for complete blood count (CBC) profile. On day 22, 38, and 52, tissues from 3 pigs per treatment were obtained for analysis of trace minerals (Fe, Zn, Cu, and Mn). Results: Pigs receiving no iron at birth had the slowest growth and lowest hematological profile demonstrating that iron deficiency anemia (IDA) was induced. Hemoglobin concentrations were increased as early as day 6 and continued to increase until day 17 for the 200 and 300 mg iron treatments. Body weight, other hematological measures, and tissue iron content were greater for pigs that received an iron injection at birth. Implications: Pigs that did not receive an iron injection shortly after birth developed IDA resulting in poor growth, low blood hematological measures, and depleted tissue iron reserves. Supplying an iron injection at birth improved preweaning and postweaning growth performance and CBC profile. The magnitude and timing of peak hematological responses was dose dependent.
{"title":"Effects of iron dosage administered to newborn piglets on hematological measures, preweaning and postweaning growth performance, and postweaning tissue mineral content","authors":"T. Chevalier, H. J. Monegue, M. Lindemann","doi":"10.54846/jshap/1207","DOIUrl":"https://doi.org/10.54846/jshap/1207","url":null,"abstract":"Objective: To evaluate the effect of iron dosage given at birth on pig growth performance, the course of the preweaning and postweaning blood profile, and postweaning tissue mineral concentration. Materials and methods: Crossbred pigs (n = 70) were assigned to 1 of 5 iron dosages (0, 50, 100, 200, and 300 mg iron) administered by injection on day 0. Body weight and blood samples were collected at day 0, 1, 2, 3, 4, 6, 8, 11, 17, 22, 23, 24, 25, 29, 38, and 52. All blood samples were analyzed for complete blood count (CBC) profile. On day 22, 38, and 52, tissues from 3 pigs per treatment were obtained for analysis of trace minerals (Fe, Zn, Cu, and Mn). Results: Pigs receiving no iron at birth had the slowest growth and lowest hematological profile demonstrating that iron deficiency anemia (IDA) was induced. Hemoglobin concentrations were increased as early as day 6 and continued to increase until day 17 for the 200 and 300 mg iron treatments. Body weight, other hematological measures, and tissue iron content were greater for pigs that received an iron injection at birth. Implications: Pigs that did not receive an iron injection shortly after birth developed IDA resulting in poor growth, low blood hematological measures, and depleted tissue iron reserves. Supplying an iron injection at birth improved preweaning and postweaning growth performance and CBC profile. The magnitude and timing of peak hematological responses was dose dependent.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46630635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Noblett, Juliana Bonin Ferriera, Sheeva Bhattarai, J. Nielsen, G. Almond
This study examined the association between hemoglobin (Hb) concentrations in sows and the number of stillborn pigs. Based on late gestation Hb concentrations, the number of prepartum and intrapartum stillborn pigs was greater (P < .001) in the anemic sows than in the nonanemic sows.
{"title":"Late gestation hemoglobin concentrations in sows: Predictor for stillborn piglets","authors":"E. Noblett, Juliana Bonin Ferriera, Sheeva Bhattarai, J. Nielsen, G. Almond","doi":"10.54846/jshap/1249","DOIUrl":"https://doi.org/10.54846/jshap/1249","url":null,"abstract":"This study examined the association between hemoglobin (Hb) concentrations in sows and the number of stillborn pigs. Based on late gestation Hb concentrations, the number of prepartum and intrapartum stillborn pigs was greater (P < .001) in the anemic sows than in the nonanemic sows.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45273315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Dee, Apoorva Shah, R. Cochrane, Fangzhou We, T. Clement, Aaron Singrey, R. Edler, G. Spronk, M. Niederwerder, E. Nelson
Extended feed storage to reduce the risk of virus survival has not been tested experimentally. Five ingredients inoculated with porcine epidemic diarrhea virus, porcine reproductive and respiratory syndrome virus-174, and Senecavirus A were stored indoors at 20°C or outdoors in Minnesota winter conditions. After 30 days, outdoor samples contained infectious virus, while indoor samples did not.
{"title":"The effect of extended storage on virus survival in feed","authors":"S. Dee, Apoorva Shah, R. Cochrane, Fangzhou We, T. Clement, Aaron Singrey, R. Edler, G. Spronk, M. Niederwerder, E. Nelson","doi":"10.54846/jshap/1214","DOIUrl":"https://doi.org/10.54846/jshap/1214","url":null,"abstract":"Extended feed storage to reduce the risk of virus survival has not been tested experimentally. Five ingredients inoculated with porcine epidemic diarrhea virus, porcine reproductive and respiratory syndrome virus-174, and Senecavirus A were stored indoors at 20°C or outdoors in Minnesota winter conditions. After 30 days, outdoor samples contained infectious virus, while indoor samples did not.","PeriodicalId":17095,"journal":{"name":"Journal of Swine Health and Production","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47212171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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