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3. Diagnostic survey of analytical methods used to determine bone mineralization in pigs

Author

Williams, Hadley R, primary, Tokach, Mike D, additional, Woodworth, Jason C, additional, DeRouchey, Joel M, additional, Goodband, Robert D, additional, Bergstrom, Jon R, additional, Rahe, Michael C, additional, Siepker, Christopher L, additional, Sitthicharoenchai, Panchan, additional, Ensley, Steve M, additional, Radke, Scott L, additional, and Gebhardt, Jordan T, additional

Published
2024
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4. Bovine Highly Pathogenic Avian Influenza Virus Stability and Inactivation in the Milk Byproduct Lactose.

Author

Kwon, Taeyong, Gebhardt, Jordan T., Lyoo, Eu Lim, Nooruzzaman, Mohammed, Gaudreault, Natasha N., Morozov, Igor, Diel, Diego G., and Richt, Juergen A.

Subjects
*INFLUENZA A virus, H5N1 subtype, *AVIAN influenza A virus, *VIRAL ecology, *PATHOGENIC viruses, *VIRUS inactivation, *INFLUENZA viruses
Abstract

The recent incursion of highly pathogenic influenza viruses into dairy cattle opens new insights for influenza virus ecology and its interspecies transmission and may have a significant impact on public health and agriculture. The aim of this study was to determine the stability of a bovine highly pathogenic avian influenza H5N1 virus isolate in the milk byproduct lactose and to evaluate two inactivation methods using industrial procedures. The bovine isolate of the highly pathogenic avian influenza H5N1 virus was stable for 14 days in a concentrated lactose solution under refrigerated conditions. Heat or citric acid treatments successfully inactivated the virus in lactose. This study highlights the persistence of HPAIV in lactose and its efficient inactivation under industrial standards. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Development and optimization of sampling techniques for environmental samples from African swine fever virus-contaminated surfaces with no organic contaminants.

Author

Taeyong Kwon, Gebhardt, Jordan T., Eu Lim Lyoo, Gaudreault, Natasha N., Trujillo, Jessie D., Woodworth, Jason C., Paulk, Chad B., Jones, Cassandra K., and Richt, Juergen A.

Subjects
AFRICAN swine fever, ENVIRONMENTAL sampling, SURGICAL sponges, WILD boar, COMMUNICABLE diseases
Abstract

African swine fever (ASF) is a highly contagious diseases in domestic pigs and wild boars with up to 100% mortality. ASF virus (ASFV) is a causative agent responsible for ASF and highly resistant in environments, which creates a significant challenge for the control and eradication of the virus. Despite the geographical expansion of ASFV and internationalmovement of products to sustain the swine production system, there is limited knowledge on the use of environmental samples to perform surveillance to prevent the introduction of ASFV into ASFV-free areas and for control of transmission in affected areas. Therefore, this study aimed to develop and optimize sampling techniques for environmental samples for ASFV detection. The stainless steel surfaces were contaminated with ASFV-infected blood, swabbed using different devices, and then processed through different techniques. The environmental samples were processed and tested using qPCR analysis. The results showed that the use of pre-moistened gauze surgical sponges, sweeping pads, and sponge sticks resulted in increased sensitivity, when compared to either dry sampling devices or Dacron swab. In particular, the combination of the sponge stick and the commercial nucleic acid preservative supported the best detection of ASFV DNA on the clean stainless steel surfaces evaluated. Pre-incubation for the short period of time and centrifugation at low speed were sufficient to provide satisfactory diagnostic sensitivity of ASFV detection using qPCR for environmental samples. Our findings contribute to the development of techniques for environmental samples for ASFV surveillance to prevent the introduction and dissemination of ASFV. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Evaluation of Truck Cab Decontamination Procedures following Inoculation with Porcine Epidemic Diarrhea Virus and Porcine Reproductive and Respiratory Syndrome Virus

Author

Houston, Grace E., primary, Jones, Cassandra K., additional, Evans, Caitlin, additional, Otott, Haley K., additional, Stark, Charles R., additional, Bai, Jianfa, additional, Poulsen Porter, Elizabeth G., additional, de Almeida, Marcelo N., additional, Zhang, Jianqiang, additional, Gauger, Phillip C., additional, Blomme, Allison K., additional, Woodworth, Jason C., additional, Paulk, Chad B., additional, and Gebhardt, Jordan T., additional

Published
2024
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10. Detection of African Swine Fever Virus in Feed and Feed Mill Environment Following Extended Storage

Author

National Pork Board (US), Center of Excellence for Emerging and Zoonotic Animal Diseases (US), Houston, Grace E. [0000-0001-8113-1616], Trujillo, Jessie D. [0000-0002-4930-5839], Cool, Konner R. [0000-0003-3666-0214], Paulk, Chad B. [0000-0001-8844-6477], Gaudreault, Natasha N. [0000-0002-7195-785X], Woodworth, Jason C. [0000-0001-7268-4278], Morozov, Igor [0000-0002-9343-5446], Gallardo, Carmina [0000-0003-3293-306X], Gebhardt, Jordan T. [0000-0002-6144-6714], Richt, Jürgen A. [0000-0001-7308-5672], Houston, Grace E., Trujillo, Jessie D., Jones, Cassandra K., Kwon, Taeyong, Stark, Charles R., Cool, Konner R., Paulk, Chad B., Gaudreault, Natasha N., Woodworth, Jason C., Morozov, Igor, Gallardo, Carmina, Gebhardt, Jordan T., Richt, Jürgen A., National Pork Board (US), Center of Excellence for Emerging and Zoonotic Animal Diseases (US), Houston, Grace E. [0000-0001-8113-1616], Trujillo, Jessie D. [0000-0002-4930-5839], Cool, Konner R. [0000-0003-3666-0214], Paulk, Chad B. [0000-0001-8844-6477], Gaudreault, Natasha N. [0000-0002-7195-785X], Woodworth, Jason C. [0000-0001-7268-4278], Morozov, Igor [0000-0002-9343-5446], Gallardo, Carmina [0000-0003-3293-306X], Gebhardt, Jordan T. [0000-0002-6144-6714], Richt, Jürgen A. [0000-0001-7308-5672], Houston, Grace E., Trujillo, Jessie D., Jones, Cassandra K., Kwon, Taeyong, Stark, Charles R., Cool, Konner R., Paulk, Chad B., Gaudreault, Natasha N., Woodworth, Jason C., Morozov, Igor, Gallardo, Carmina, Gebhardt, Jordan T., and Richt, Jürgen A.

Abstract

One way to mitigate risk of feed-based pathogens for swine diets is to quarantine feed ingredients before inclusion in complete diets. Data have been generated evaluating the stability of swine viruses in ingredients, but the stability of African swine fever virus (ASFV) in feed or in a feed manufacturing environment has not been well characterized. Therefore, this study aimed to determine the stability of ASFV DNA in swine feed and on mill surfaces over time. A pilot-scale feed mill was used to manufacture six sequential batches of feed consisting of a batch of ASFV-free feed, followed by a batch inoculated with ASFV (final concentration = 5.6 × 104 TCID50/g), and then four subsequent ASFV-free batches. After each batch, 10 feed samples were aseptically collected in a double “X” pattern. During feed manufacturing, 24 steel coupons were placed on the floor of the manufacturing area and allowed to collect dust during feed manufacturing. Once feed manufacturing was completed, feed samples and steel coupons were stored at room temperature. Three of each were randomly selected from storage on 3, 7, 14, 28, 60, 90, and 180 days after feed manufacturing and analyzed for ASFV DNA. For feed samples, there was evidence of a batch × day interaction (P ¼ 0:023) for the quantification of genomic copies/g of feed, indicating that the amount of ASFV DNA present was impacted by both the batch of feed and days held at room temperature. There were no differences of genomic copies/g in early batches, but quantity of detectable ASFV decreased with increasing storage time. In Batches 4–6, the greatest quantity of ASFV DNA was detected on the day of feed manufacturing. The lowest quantity was detected on Day 7 for Batch 4, Day 60 for Batch 5, and at 28 and 180 days for Batch 6. There was no evidence of ASFV degradation on environmental discs across holding times (P ¼ 0:433). In conclusion, the quarantining of feed may help reduce but not eliminate the presence of ASFV DNA in feed over t

Published
2023

13. 245 Effects of Standardized Ileal Digestible Tryptophan to Lysine Ratio on Growth Performance of PIC Line 337-Sired Grow-Finish Pigs

Author

Royall, Rafe Q, primary, Tokach, Mike D, additional, Woodworth, Jason C, additional, DeRouchey, Joel M, additional, Goodband, Robert D, additional, Gebhardt, Jordan T, additional, Vier, Carine M, additional, Spindler, Matthew, additional, Orlando, Uislei A, additional, Zaragoza, Luis E, additional, Lu, Ning, additional, Cast, Wayne R, additional, Wilson-Wells, Danielle, additional, Holen, Julia, additional, and Betlach, Alyssa, additional

Published
2023
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18. 46 The Distribution of Porcine Epidemic Diarrhea Virus, Porcine Reproductive and Respiratory Syndrome Virus, and Seneca Valley Virus 1 Inoculated Feed After Chemical Mitigation to Flush a Feed Mill

Author

Harrison, Olivia, primary, Otott, Haley, additional, Bai, Jianfa, additional, Hamill, Vaughn, additional, Woodworth, Jason C, additional, Jones, Cassandra K, additional, Stark, Charles R, additional, Pogranichniy, Roman, additional, Gebhardt, Jordan T, additional, and Paulk, Chad B, additional

Published
2023
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25. 129 Effects of Standardized Ileal Digestible Lysine on Growth Performance of 12- to 136-kg PIC Line 800-Sired Pigs

Author

Gaffield, Katelyn, primary, Tokach, Mike D, additional, Woodworth, Jason C, additional, DeRouchey, Joel M, additional, Goodband, Robert D, additional, Gebhardt, Jordan T, additional, Vier, Carine M, additional, Spindler, Matthew, additional, Orlando, Uislei A, additional, Zaragoza, Luis E, additional, Lu, Ning, additional, Cast, Wayne R, additional, Wilson-Wells, Danielle, additional, Holen, Julia, additional, and Betlach, Alyssa, additional

Published
2023
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42. 240 Comparing Increasing Tryptophan: Lysine Ratios in Distiller Dried Grains-Based Diets with or without Distiller Dried Grains withdrawal Strategy on Growth and Carcass Performance of Grow-Finish Pigs

Author

Spinler, Mikayla, primary, Tolosa, Andres F, additional, Woodworth, Jason C, additional, Tokach, Mike D, additional, Goodband, Robert D, additional, DeRouchey, Joel M, additional, Coble, Kyle, additional, Gerhart, Amanda J, additional, Soto, Jose A, additional, and Gebhardt, Jordan T, additional

Published
2023
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44. The effect of bone and analytical methods on the assessment of bone mineralization response to dietary phosphorus, phytase, and vitamin D in nursery pigs

Author

Williams, Hadley R, primary, Chin, Taylor E, additional, Tokach, Mike D, additional, Woodworth, Jason C, additional, DeRouchey, Joel M, additional, Goodband, Robert D, additional, Bergstrom, Jon R, additional, Rahe, Michael C, additional, Siepker, Christopher L, additional, Sitthicharoenchai, Panchan, additional, Radke, Scott L, additional, Ensley, Steve M, additional, and Gebhardt, Jordan T, additional

Published
2023
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45. Infectious Dose of African Swine Fever Virus When Consumed Naturally in Liquid or Feed

Author

Niederwerder, Megan C., Stoian, Ana M.M., Rowland, Raymond R.R., Dritz, Steve S., Petrovan, Vlad, Constance, Laura A., Gebhardt, Jordan T., Olcha, Matthew, Jones, Cassandra K., Woodworth, Jason C., Fang, Ying, Liang, Jia, and Hefley, Trevor J.

Subjects
Legal fees -- Health aspects -- Comparative analysis, Disease transmission -- Health aspects -- Comparative analysis, Livestock industry -- Health aspects -- Comparative analysis, Pork industry -- Health aspects -- Comparative analysis, Hog cholera -- Health aspects -- Comparative analysis, Livestock farms -- Health aspects -- Comparative analysis, Swine -- Health aspects -- Comparative analysis, Farms, Health
Abstract

African swine fever virus (ASFV) is an emerging threat to swine production in North America and Europe. During the past decade, ASFV has spread into Eastern Europe and Russia (1,2) [...]

Published
2019
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47. Detection of African Swine Fever Virus in Feed and Feed Mill Environment Following Extended Storage

Author

Houston, Grace E., primary, Trujillo, Jessie D., additional, Jones, Cassandra K., additional, Kwon, Taeyong, additional, Stark, Charles R., additional, Cool, Konner, additional, Paulk, Chad B., additional, Gaudreault, Natasha N., additional, Woodworth, Jason C., additional, Morozov, Igor, additional, Gallardo, Carmina, additional, Gebhardt, Jordan T., additional, and Richt, Jürgen A., additional

Published
2023
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48. Comparing tryptophan:lysine ratios in dried distillers grains with solubles-based diets with and without a dried distillers grains with solubles withdrawal strategy on growth, carcass characteristics, and carcass fat iodine value of growing-finishing pigs

Author

Spinler, Mikayla S, primary, Tolosa, Andres F, additional, Gebhardt, Jordan T, additional, Tokach, Mike D, additional, Goodband, Robert D, additional, DeRouchey, Joel M, additional, Coble, Kyle F, additional, and Woodworth, Jason C, additional

Published
2023
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