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1,052 results on '"Torgerson, Paul"'

8. Approximating the global economic (market) value of farmed animals

Author

Schrobback, Peggy, Dennis, Gabriel, Li, Yin, Mayberry, Dianne, Shaw, Alexandra, Knight-Jones, Theodore, Marsh, Thomas Lloyd, Pendell, Dustin L., Torgerson, Paul R., Gilbert, William, Huntington, Benjamin, Raymond, Kassy, Stacey, Deborah A., Bernardo, Theresa, Bruce, Mieghan, McIntyre, K. Marie, Rushton, Jonathan, and Herrero, Mario

Published
2023
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11. Unveiling the incidences and trends of the neglected zoonosis cystic echinococcosis in Europe: a systematic review from the MEmE project

Author

Casulli, Adriano, Abela-Ridder, Bernadette, Petrone, Daniele, Fabiani, Massimo, Bobić, Branko, Carmena, David, Šoba, Barbara, Zerem, Enver, Gargaté, Maria João, Kuzmanovska, Gordana, Calomfirescu, Cristian, Rainova, Iskra, Sotiraki, Smaragda, Lungu, Vera, Dezsényi, Balázs, Herrador, Zaida, Karamon, Jacek, Maksimov, Pavlo, Oksanen, Antti, Millon, Laurence, Sviben, Mario, Shkjezi, Renata, Gjoni, Valbona, Akshija, Ilir, Saarma, Urmas, Torgerson, Paul, Šnábel, Viliam, Antolová, Daniela, Muhovic, Damir, Besim, Hasan, Chereau, Fanny, Belhassen García, Moncef, Chappuis, François, Gloor, Severin, Stoeckle, Marcel, Müllhaupt, Beat, Manno, Valerio, Santoro, Azzurra, and Santolamazza, Federica

Published
2023
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21. Environmental distribution of Echinococcus- and Taenia spp.-contaminated dog feces in Kyrgyzstan

Author

Abdykerimov, Kubanychbek K., Kronenberg, Philipp, Isaev, Myktybek, Paternoster, Giulia, Deplazes, Peter, Torgerson, Paul R., Abdykerimov, Kubanychbek K., Kronenberg, Philipp, Isaev, Myktybek, Paternoster, Giulia, Deplazes, Peter, and Torgerson, Paul R.

Abstract

Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch), Recently, there have been epidemics of human cystic echinococcosis (CE) and alveolar echinococcosis (AE) in Kyrgyzstan. This study investigated 2 districts for the presence of Echinococcus granulosus s.l. and Echinococcus multilocularis eggs; species identity was confirmed by polymerase chain reaction in dog feces and the level of environmental contamination with parasite eggs in 2017–2018 was also investigated. In the Alay district 5 villages with a high reported annual incidence of AE of 162 cases per 100 000 and 5 villages in the Kochkor district which had a much lower incidence of 21 cases per 100 000 were investigated. However, the proportion of dog feces containing E. granulosus s.l. eggs was ~4.2 and ~3.5% in Alay and Kochkor respectively. For E. multilocularis, the corresponding proportions were 2.8 and 3.2%. Environmental contamination of Echinococcus spp. eggs was estimated using the McMaster technique for fecal egg counts, weight and density of canine feces. The level of environmental contamination with E. multilocularis eggs was similar at 4.4 and 5.0 eggs per m2 in Alay and Kochkor respectively. The corresponding values for E. granulosus s.l. were 8.3 and 7.5 eggs per m2. There was no association between village or district level incidence of human AE or CE and the proportion of dog feces containing eggs of Echinococcus spp. or the level of environmental contamination. Increased contamination of taeniid eggs occured in the autumn, after the return of farmers with dogs from summer mountain pastures.

Published
2024

22. Environmental distribution of Echinococcus and Taenia spp-contaminated dog faeces in Kyrgyzstan

Author

Abdykerimov, Kubanychbek K, Kronenberg, Philipp Andreas; https://orcid.org/0000-0003-1968-6543, Isaev, Myktybek, Paternoster, Giulia; https://orcid.org/0000-0002-4612-1452, Deplazes, Peter; https://orcid.org/0000-0002-1118-5405, Torgerson, Paul R; https://orcid.org/0000-0003-4277-9983, Abdykerimov, Kubanychbek K, Kronenberg, Philipp Andreas; https://orcid.org/0000-0003-1968-6543, Isaev, Myktybek, Paternoster, Giulia; https://orcid.org/0000-0002-4612-1452, Deplazes, Peter; https://orcid.org/0000-0002-1118-5405, and Torgerson, Paul R; https://orcid.org/0000-0003-4277-9983

Abstract

Recently, there have been epidemics of human cystic echinococcosis (CE) and alveolar echinococcosis (AE) in Kyrgyzstan. This study investigated 2 districts for the presence of Echinococcus granulosus s.l. and Echinococcus multilocularis eggs; species identity was confirmed by polymerase chain reaction in dog feces and the level of environmental contamination with parasite eggs in 2017–2018 was also investigated. In the Alay district 5 villages with a high reported annual incidence of AE of 162 cases per 100 000 and 5 villages in the Kochkor district which had a much lower incidence of 21 cases per 100 000 were investigated. However, the proportion of dog feces containing E. granulosus s.l. eggs was ~4.2 and ~3.5% in Alay and Kochkor respectively. For E. multilocularis, the corresponding proportions were 2.8 and 3.2%. Environmental contamination of Echinococcus spp. eggs was estimated using the McMaster technique for fecal egg counts, weight and density of canine feces. The level of environmental contamination with E. multilocularis eggs was similar at 4.4 and 5.0 eggs per m2 in Alay and Kochkor respectively. The corresponding values for E. granulosus s.l. were 8.3 and 7.5 eggs per m2. There was no association between village or district level incidence of human AE or CE and the proportion of dog feces containing eggs of Echinococcus spp. or the level of environmental contamination. Increased contamination of taeniid eggs occured in the autumn, after the return of farmers with dogs from summer mountain pastures.

Published
2024

23. Hierarchical modelling of faecal egg counts to assess anthelmintic efficacy

Author

Paul, Michaela, Torgerson, Paul R., Höglund, Johan, and Furrer, Reinhard

Subjects
Statistics - Applications
Abstract

Counting the number of parasite eggs in faecal samples is a widely used diagnostic method to evaluate parasite burden. Typically a sub-sample of the diluted faeces is examined for eggs. The resulting egg counts are multiplied by a specific correction factor to estimate the mean parasite burden. To detect anthelmintic resistance, the mean parasite burden from treated and untreated animals are compared. However, this standard method has some limitations. In particular, the analysis of repeated samples may produce quite variable results as the sampling variability due to the counting technique is ignored. We propose a hierarchical model that takes this sampling variability as well as between-animal variation into account. Bayesian inference is done via Markov chain Monte Carlo sampling. The performance of the hierarchical model is illustrated by a re-analysis of faecal egg count data from a Swedish study assessing the anthelmintic resistance of nematode parasite in sheep. A simulation study shows that the hierarchical model provides better classification of anthelmintic resistance compared to the standard method., Comment: 14 pages, 7 figures, 1 table

Published
2014

24. Food-borne Trematodiases in East Asia: Epidemiology and Burden

Author

Fürst, Thomas, Yongvanit, Puangrat, Khuntikeo, Narong, Lun, Zhao-Rong, Haagsma, Juanita A., Torgerson, Paul R., Odermatt, Peter, Bürli, Christine, Chitnis, Nakul, Sithithaworn, Paiboon, Hotez, Peter J., Series Editor, Utzinger, Jürg, editor, Yap, Peiling, editor, Bratschi, Martin, editor, and Steinmann, Peter, editor

Published
2019
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26. Modelling bluetongue risk in Kazakhstan

Author

Abdrakhmanov, Sarsenbay K., Beisembayev, Kanatzhan K., Sultanov, Akmetzhan A., Mukhanbetkaliyev, Yersyn Y., Kadyrov, Ablaikhan S., Ussenbayev, Altay Y., Zhakenova, Aigerim Y., and Torgerson, Paul R.

Published
2021
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29. Epidemiology and control.

Author

Knubben-Schweizer, Gabriela, primary, Rössler, Anne-Sophie, additional, Schade-Weskott, Eva, additional, and Torgerson, Paul R., additional

Published
2021
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39. Economic impact of chicken diseases and other causes of morbidity or mortality in backyard farms in low-income and middle-income countries: A systematic review and meta-analysis

Author

Munoz-Gomez, Violeta, primary, Shaw, Alexandra PM, additional, Abdykerimov, Kuban, additional, Abo-Shebada, Mahmoud, additional, Bulbuli, Faraz, additional, Charypkhan, Duriya, additional, Delphino, Marina, additional, Leger, Anais, additional, Li, Yin, additional, Rasmussen, Philip, additional, Rittem, Sukuman, additional, Ahmadi, Bouda Vosough, additional, and Torgerson, Paul R, additional

Published
2023
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46. Intense Focus of Alveolar Echinococcosis, South Kyrgyzstan

Author

Jackson, Kelly A., Gould, L. Hannah, Hunter, Jennifer C., Kucerova, Bebezov, Bakhadyr, Mamashev, Nurlan, Umetaliev, Tilek, Ziadinov, Iskender, Craig, Philip S., Joekel, Deborah E., Deplazes, Peter, Grimm, Felix, and Torgerson, Paul R.

Subjects
Prevalence studies (Epidemiology), Echinococcosis -- Distribution, Lung diseases -- Distribution, Company distribution practices, Health
Abstract

Human alveolar echinococcosis (AE), caused by the larval stage of Echinococcus multilocularis, is a lethal parasitic zoonosis if untreated (1,2). In China, hyperendemic foci of disease have been described (3) [...]

Published
2018
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