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Dittoe DK, Anderson RC, Krueger NA, Harvey RB, Poole TL, Crippen TL, Callaway TR, Ricke SC. Survival of Campylobacter jejuni during in vitro culture with mixed bovine ruminal microorganisms in the presence of methanogen inhibitors. J Environ Sci Health B 2023; 58:711-717. [PMID: 37897369 DOI: 10.1080/03601234.2023.2273754] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/30/2023]
Abstract
Foodborne pathogen Campylobacter jejuni has been associated with ruminants. The objectives of this experiment were to determine C. jejuni survivability in mixed in vitro rumen microbial populations and the impact on methane production with or without methane inhibitors 2-bromosulfonate (BES) and/or sodium nitrate. When inoculated into rumen microbial populations without or with 0.5 mM BES, 5.0 mM nitrate or their combination, C. jejuni viability decreased from 4.7 ± 0.1 log10 colony forming units (CFU)/mL after 24 h. Loss of C. jejuni viability was greater (P < 0.05) when incubated under 100% CO2 compared to 50% H2:50% CO2, decreasing 1.46 versus 1.15 log units, respectively. C. jejuni viability was also decreased (P < 0.05) by more than 0.43 log units by the anti-methanogen treatments. Rumen microbial populations produced less methane (P = 0.05) when incubated with than without C. jejuni regardless of whether under 100% CO2 or 50% H2:50% CO2. For either gas phase, nitrate was decreased (13.2 versus 37.9%) by the anti-methanogen treatments versus controls although not always significant. C. jejuni-inoculated populations metabolized 16.4% more (P < 0.05) nitrate under H2:CO2 versus 100% CO2. Apparently, C. jejuni can compete for H2 with methanogens but has limited survivability under rumen conditions.
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Affiliation(s)
- D K Dittoe
- Department of Animal Science, University of Wyoming, Laramie, Wyoming, USA
| | - R C Anderson
- United States Department of Agriculture/Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, Texas, USA
| | - N A Krueger
- Agricultural Sciences, Blinn College, Bryan, Texas, USA
| | - R B Harvey
- United States Department of Agriculture/Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, Texas, USA
| | - T L Poole
- United States Department of Agriculture/Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, Texas, USA
| | - T L Crippen
- United States Department of Agriculture/Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, Texas, USA
| | - T R Callaway
- Department of Animal and Dairy Science, Ruminant Nutrition, Ruminant Microbiology, and Preharvest Food Safety, University of Georgia, Athens, Georgia, USA
| | - S C Ricke
- Department of Animal and Dairy Sciences, Meat Science and Animal Biologics Discovery Program, University of Wisconsin, Madison, Wisconsin, USA
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Wottlin LR, Harvey RB, Norman KN, Burciaga S, Loneragan GH, Droleskey RE, Anderson RC. Prevalence and Antimicrobial Resistance of Nontyphoidal Salmonella enterica from Head Meat and Trim for Ground Product at Pork Processing Facilities. J Food Prot 2022; 85:1008-1016. [PMID: 35499403 DOI: 10.4315/jfp-22-049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 04/21/2022] [Indexed: 11/11/2022]
Abstract
ABSTRACT Pork head meat may harbor Salmonella and contaminate other carcass by-products during harvest and fabrication. A large pork processing plant in the United States was sampled bimonthly for 11 months to determine the concentration, prevalence, seasonality, serotype diversity, and antimicrobial susceptibility of Salmonella enterica isolated from cheek meat and head trim of swine carcasses. Each collection consisted of 25 samples on two consecutive days in the morning and afternoon shifts, for a total of 100 cheek meat and 100 head trim samples each month. Tissues were cultured for Salmonella by using restrictive media and enrichment techniques, and a subset of isolates was serotyped, analyzed for antimicrobial susceptibility, and genome sequenced. Salmonella postenrichment prevalence did not differ (P = 0.20) between cheek meat (63%) and head trim (66%). Postenrichment prevalence differed (P < 0.05) by month (January, 94%; March, 80%; May, 54%; July, 59%; September, 47%; and November, 55%) and by processing shift (morning, 68%; afternoon, 62%). The subset (n = 618) of isolates selected for serotyping yielded 21 distinct serotypes: Typhimurium (49%), Infantis (10%), Heidelberg (8%), I 4,[5],12:i:- (8%), and 17 other types (≤5%). In total, 407 multidrug-resistant (MDR; resistance to three or more antibiotic classes) isolates were identified. There were 120 isolates that exhibited the penta-resistant ACSSuT phenotype. In addition, 113 isolates exhibited decreased susceptibility to ciprofloxacin (MIC ≥ 0.12 μg/mL). Resistance genes blaCARB, blaSHV, blaTEM, aac(6')-Ib-cr,qnrB, sul2, and dfrA were expressed in numerous MDR Salmonella isolates. The data herein suggest that pork products from the head, compared with data reported for carcasses, may have a relatively high prevalence of Salmonella with diverse serotypes and MDR. HIGHLIGHTS
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Affiliation(s)
- L R Wottlin
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845
| | - R B Harvey
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845
| | - K N Norman
- Veterinary Integrative Biosciences, Texas A&M University, 3201 Russell Long Boulevard, College Station, Texas 77845
| | - S Burciaga
- Veterinary Integrative Biosciences, Texas A&M University, 3201 Russell Long Boulevard, College Station, Texas 77845
| | - G H Loneragan
- School of Veterinary Medicine, Texas Tech University, 7671 Evans Drive, Amarillo, Texas 79106, USA
| | - R E Droleskey
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845
| | - R C Anderson
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845
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Marsh CJ, Sica YV, Burgin CJ, Dorman WA, Anderson RC, del Toro Mijares I, Vigneron JG, Barve V, Dombrowik VL, Duong M, Guralnick R, Hart JA, Maypole JK, McCall K, Ranipeta A, Schuerkmann A, Torselli MA, Lacher T, Mittermeier RA, Rylands AB, Sechrest W, Wilson DE, Abba AM, Aguirre LF, Arroyo‐Cabrales J, Astúa D, Baker AM, Braulik G, Braun JK, Brito J, Busher PE, Burneo SF, Camacho MA, Cavallini P, de Almeida Chiquito E, Cook JA, Cserkész T, Csorba G, Cuéllar Soto E, da Cunha Tavares V, Davenport TRB, Deméré T, Denys C, Dickman CR, Eldridge MDB, Fernandez‐Duque E, Francis CM, Frankham G, Franklin WL, Freitas T, Friend JA, Gadsby EL, Garbino GST, Gaubert P, Giannini N, Giarla T, Gilchrist JS, Gongora J, Goodman SM, Gursky‐Doyen S, Hackländer K, Hafner MS, Hawkins M, Helgen KM, Heritage S, Hinckley A, Hintsche S, Holden M, Holekamp KE, Honeycutt RL, Huffman BA, Humle T, Hutterer R, Ibáñez Ulargui C, Jackson SM, Janecka J, Janecka M, Jenkins P, Juškaitis R, Juste J, Kays R, Kilpatrick CW, Kingston T, Koprowski JL, Kryštufek B, Lavery T, Lee TE, Leite YLR, Novaes RLM, Lim BK, Lissovsky A, López‐Antoñanzas R, López‐Baucells A, MacLeod CD, Maisels FG, Mares MA, Marsh H, Mattioli S, Meijaard E, Monadjem A, Morton FB, Musser G, Nadler T, Norris RW, Ojeda A, Ordóñez‐Garza N, Pardiñas UFJ, Patterson BD, Pavan A, Pennay M, Pereira C, Prado J, Queiroz HL, Richardson M, Riley EP, Rossiter SJ, Rubenstein DI, Ruelas D, Salazar‐Bravo J, Schai‐Braun S, Schank CJ, Schwitzer C, Sheeran LK, Shekelle M, Shenbrot G, Soisook P, Solari S, Southgate R, Superina M, Taber AB, Talebi M, Taylor P, Vu Dinh T, Ting N, Tirira DG, Tsang S, Turvey ST, Valdez R, Van Cakenberghe V, Veron G, Wallis J, Wells R, Whittaker D, Williamson EA, Wittemyer G, Woinarski J, Zinner D, Upham NS, Jetz W. Expert range maps of global mammal distributions harmonised to three taxonomic authorities. J Biogeogr 2022; 49:979-992. [PMID: 35506011 PMCID: PMC9060555 DOI: 10.1111/jbi.14330] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 01/05/2022] [Accepted: 01/13/2022] [Indexed: 06/01/2023]
Abstract
AIM Comprehensive, global information on species' occurrences is an essential biodiversity variable and central to a range of applications in ecology, evolution, biogeography and conservation. Expert range maps often represent a species' only available distributional information and play an increasing role in conservation assessments and macroecology. We provide global range maps for the native ranges of all extant mammal species harmonised to the taxonomy of the Mammal Diversity Database (MDD) mobilised from two sources, the Handbook of the Mammals of the World (HMW) and the Illustrated Checklist of the Mammals of the World (CMW). LOCATION Global. TAXON All extant mammal species. METHODS Range maps were digitally interpreted, georeferenced, error-checked and subsequently taxonomically aligned between the HMW (6253 species), the CMW (6431 species) and the MDD taxonomies (6362 species). RESULTS Range maps can be evaluated and visualised in an online map browser at Map of Life (mol.org) and accessed for individual or batch download for non-commercial use. MAIN CONCLUSION Expert maps of species' global distributions are limited in their spatial detail and temporal specificity, but form a useful basis for broad-scale characterizations and model-based integration with other data. We provide georeferenced range maps for the native ranges of all extant mammal species as shapefiles, with species-level metadata and source information packaged together in geodatabase format. Across the three taxonomic sources our maps entail, there are 1784 taxonomic name differences compared to the maps currently available on the IUCN Red List website. The expert maps provided here are harmonised to the MDD taxonomic authority and linked to a community of online tools that will enable transparent future updates and version control.
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Affiliation(s)
- Charles J. Marsh
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Yanina V. Sica
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Connor J. Burgin
- Department of BiologyUniversity of New MexicoAlbuquerqueNew MexicoUSA
| | - Wendy A. Dorman
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Robert C. Anderson
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Isabel del Toro Mijares
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Jessica G. Vigneron
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Vijay Barve
- Florida Museum of Natural HistoryUniversity of FloridaGainesvilleFloridaUSA
| | - Victoria L. Dombrowik
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Michelle Duong
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Robert Guralnick
- Florida Museum of Natural HistoryUniversity of FloridaGainesvilleFloridaUSA
| | - Julie A. Hart
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
- New York Natural Heritage ProgramState University of New York College of Environmental Science and ForestryAlbanyNew YorkUSA
| | - J. Krish Maypole
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Kira McCall
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Ajay Ranipeta
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Anna Schuerkmann
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Michael A. Torselli
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
| | - Thomas Lacher
- Department of Ecology and Conservation BiologyTexas A&M UniversityCollege StationTexasUSA
- Re:wildAustinTexasUSA
| | | | | | | | - Don E. Wilson
- National Museum of Natural HistorySmithsonian InstitutionWashingtonDistrict of ColumbiaUSA
| | - Agustín M. Abba
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE‐UNLP‐CONICET)La Plata, Buenos AiresArgentina
| | - Luis F. Aguirre
- Centro de Biodiversidad y GenéticaUniversidad Mayor de San SimónCochabambaBolivia
| | | | - Diego Astúa
- Departamento de ZoologiaUniversidade Federal de PernambucoRecifePernambucoBrazil
| | - Andrew M. Baker
- School of Biology and Environmental Science, Faculty of ScienceQueensland University of TechnologyBrisbaneQueenslandAustralia
- Biodiversity and Geosciences ProgramQueensland MuseumBrisbaneQueenslandAustralia
| | - Gill Braulik
- School of BiologyUniversity of St. AndrewsSt. Andrews, FifeUK
| | | | - Jorge Brito
- Instituto Nacional de Biodiversidad (INABIO)QuitoEcuador
| | - Peter E. Busher
- College of General StudiesBoston UniversityBostonMassachusettsUSA
| | - Santiago F. Burneo
- Sección Mastozoología, Museo de Zoología, Facultad de Ciencias Exactas y NaturalesPontificia Universidad Católica del EcuadorQuitoEcuador
| | - M. Alejandra Camacho
- Sección Mastozoología, Museo de Zoología, Facultad de Ciencias Exactas y NaturalesPontificia Universidad Católica del EcuadorQuitoEcuador
| | | | | | - Joseph A. Cook
- Museum of Southwestern Biology and Department of BiologyUniversity of New MexicoAlbuquerqueNew MexicoUSA
| | - Tamás Cserkész
- Department of ZoologyHungarian Natural History MuseumBudapestHungary
| | - Gábor Csorba
- Department of ZoologyHungarian Natural History MuseumBudapestHungary
| | | | - Valeria da Cunha Tavares
- Vale Technological InstituteBelémParáBrazil
- Laboratório de Mamíferos, Departamento de Sistemática e Ecologia, CCEN/DSEUniversidade Federal da ParaíbaJoão PessoaPBBrazil
| | - Tim R. B. Davenport
- Species Conservation & Science (Africa)Wildlife Conservation Society (WCS)ArushaTanzania
| | | | - Christiane Denys
- Institut de Systématique, Evolution, Biodiversité (ISYEB)Muséum national d'Histoire naturelle (CNRS)ParisFrance
| | - Christopher R. Dickman
- Desert Ecology Research Group, School of Life and Environmental SciencesThe University of SydneySydneyNew South WalesAustralia
| | - Mark D. B. Eldridge
- Australian Museum Research InstituteAustralian MuseumSydneyNew South WalesAustralia
| | - Eduardo Fernandez‐Duque
- Department of Anthropology and School of the EnvironmentYale UniversityNew HavenConnecticutUSA
| | - Charles M. Francis
- Canadian Wildlife ServiceEnvironment and Climate Change CanadaOttawaOntarioCanada
| | - Greta Frankham
- Australian Museum Research InstituteAustralian MuseumSydneyNew South WalesAustralia
| | - William L. Franklin
- Deparment of Natural Resource Ecology and EnvironmentIowa State UniversityAmesIowaUSA
| | - Thales Freitas
- Departamento de GenéticaUniversidade Federal do Rio Grande do SulPorto AlegreRio Grande do SulBrazil
| | - J. Anthony Friend
- Department of BiodiversityConservation and AttractionsAlbanyWestern AustraliaAustralia
| | | | | | - Philippe Gaubert
- Laboratoire Évolution & Diversité BiologiqueUniversité Toulouse III Paul SabatierToulouseFrance
| | - Norberto Giannini
- Unidad Ejecutora LilloCONICET ‐ Fundación Miguel LilloSan Miguel de Tucumán, TucumánArgentina
| | - Thomas Giarla
- Department of BiologySiena CollegeLoudonvilleNew YorkUSA
| | | | - Jaime Gongora
- Sydney School of Veterinary Science, Faculty of ScienceThe University of SydneySydneyNew South WalesAustralia
| | - Steven M. Goodman
- Negaunee Integrative Research Center, Field Museum of Natural HistoryChicagoIllinoisUSA
| | | | - Klaus Hackländer
- Institute of Wildlife Biology and Game ManagementUniversity of Natural Resources and Life SciencesWienAustria
| | - Mark S. Hafner
- Museum of Natural ScienceLouisiana State UniversityBaton RougeLouisianaUSA
| | - Melissa Hawkins
- National Museum of Natural HistorySmithsonian InstitutionWashingtonDistrict of ColumbiaUSA
| | - Kristofer M. Helgen
- Australian Museum Research InstituteAustralian MuseumSydneyNew South WalesAustralia
| | - Steven Heritage
- Duke Lemur Center, Museum of Natural HistoryDuke UniversityDurhamNorth CarolinaUSA
| | | | | | - Mary Holden
- Department of MammalogyAmerican Museum of Natural HistoryNew YorkNew YorkUSA
| | - Kay E. Holekamp
- Department of Integrative BiologyMichigan State UniversityEast LansingMichiganUSA
| | | | | | - Tatyana Humle
- Durrell Institute of Conservation and EcologySchool of Anthropology and Conservation, University of KentCanterburyUK
| | | | | | | | - Jan Janecka
- Department of Biological SciencesDuquesne UniversityPittsburghPennsylvaniaUSA
| | - Mary Janecka
- Department of Biological SciencesUniversity of PittsburghPittsburghPennsylvaniaUSA
| | - Paula Jenkins
- Mammal Group, Vertebrates DivisionDepartment of Life Sciences, The Natural History MuseumLondonUK
| | | | | | - Roland Kays
- North Carolina Museum of Natural SciencesRaleighNorth CarolinaUSA
| | | | - Tigga Kingston
- Department of Biological SciencesTexas Tech UniversityLubbockTexasUSA
| | | | | | - Tyrone Lavery
- Fenner School of Environment and SocietyThe Australian National UniversityActonAustralian Capital TerritoryAustralia
| | - Thomas E. Lee
- Department of BiologyAbilene Christian UniversityAbileneTexasUSA
| | - Yuri L. R. Leite
- Departamento de Ciências BiológicasUniversidade Federal do Espírito SantoVitóriaEspiríto SantoBrazil
| | | | - Burton K. Lim
- Department of Natural HistoryRoyal Ontario MuseumTorontoOntarioCanada
| | | | - Raquel López‐Antoñanzas
- Institut des Sciences de l'Évolution de Montpellier (ISE‐M, UMR 5554, UM/CNRS/IRD/EPHE)MontpellierFrance
| | | | | | - Fiona G. Maisels
- Wildlife Conservation SocietyGlobal Conservation ProgramNew YorkNew YorkUSA
- Faculty of Natural SciencesUniversity of StirlingStirlingUK
| | | | - Helene Marsh
- Division of Tropical Environments and SocietiesCentre for Tropical Water and Aquatic Ecosystem Research, James Cook UniversityTownsvilleQueenslandAustralia
| | - Stefano Mattioli
- Research Unit of Behavioural Ecology, Ethology and Wildlife Management, Department of Life SciencesUniversity of SienaSienaItaly
| | - Erik Meijaard
- Borneo FuturesBandar Seri BegawanBABrunei Darussalam
| | - Ara Monadjem
- Department of Biological SciencesUniversity of EswatiniKwaluseniEswatini
- Department of Zoology & Entomology, Mammal Research InstituteUniversity of PretoriaPretoriaSouth Africa
| | | | - Grace Musser
- Jackson School of GeosciencesUniversity of Texas at AustinAustinTexasUSA
| | - Tilo Nadler
- Cuc Phuong CommuneNho Quan DistrictNinh BInh, ProvinceVietnam
| | - Ryan W. Norris
- Evolution, Ecology and Organismal BiologyThe Ohio State UniversityLimaOhioUSA
| | - Agustina Ojeda
- Instituto Argentino de Zonas Áridas (IADIZA)‐CCT Mendoza‐CONICETMendozaArgentina
| | | | | | - Bruce D. Patterson
- Negaunee Integrative Research Center, Field Museum of Natural HistoryChicagoIllinoisUSA
| | - Ana Pavan
- Universidade de São PauloSão PauloBrazil
| | - Michael Pennay
- NSW National Parks and Wildlife ServiceQueanbeyanNew South WalesAustralia
| | | | | | - Helder L. Queiroz
- Instituto de Desenvolvimento Sustentável Mamirauá – IDSMTeféAmazonasBrazil
| | | | - Erin P. Riley
- Department of AnthropologySan Diego State UniversitySan DiegoCaliforniaUSA
| | - Stephen J. Rossiter
- School of Biological and Chemical SciencesQueen Mary University of LondonLondonUK
| | - Daniel I. Rubenstein
- Department of Ecology and Evolutionary BiologyPrinceton UniversityPrincetonNew JerseyUSA
| | - Dennisse Ruelas
- Museo de Historia NaturalUniversidad Nacional Mayor de San Marcos, LimaLimaPeru
- Institut des Sciences de l'Evolution (ISEM, UMR 5554 CNRS‐IRD‐UM)Université de MontpellierMontpellier Cedex 5France
| | | | - Stéphanie Schai‐Braun
- Institute of Wildlife Biology and Game ManagementUniversity of Natural Resources and Life SciencesViennaAustria
| | - Cody J. Schank
- Re:wildAustinTexasUSA
- Department of Geography and the EnvironmentThe University of Texas at AustinAustinTexasUSA
| | | | - Lori K. Sheeran
- Department of Anthropology and Museum StudiesCentral Washington UniversityEllensburgWAUSA
| | - Myron Shekelle
- Department of AnthropologyWestern Washington UniversityBellinghamWAUSA
| | - Georgy Shenbrot
- Mitrani Department of Desert EcologyJacob Blaustein Institutes for Desert ResearchBen‐Gurion University of the NegevMidreshet Ben‐GurionIsrael
| | - Pipat Soisook
- Princess Maha Chakri Sirindhorn Natural History MuseumPrince of Songkhla UniversityHatyai, SongkhlaThailand
| | - Sergio Solari
- Instituto de BiologíaUniversidad de AntioquiaMedellínColombia
| | | | - Mariella Superina
- IMBECU, CCT CONICET Mendoza – UNCuyoParque Gral. San MartínMendozaArgentina
| | - Andrew B. Taber
- Forestry DivisionFood and Agriculture Organization of the United NationsRomeItaly
| | - Maurício Talebi
- Laboratório de Ecologia e Conservação da NaturezaDeptartamento de Ciências AmbientaisUniversidade Federal de São Paulo (UNIFESP) ‐ Campus Diadema, DiademaSão PauloBrazil
| | | | - Thong Vu Dinh
- Institute of Ecology and Biological ResourcesVietnam Academy of Science and TechnologyHanoiVietnam
| | - Nelson Ting
- Department of AnthropologyUniversity of OregonEugeneOregonUSA
| | | | - Susan Tsang
- Department of MammalogyAmerican Museum of Natural HistoryNew YorkNew YorkUSA
| | | | - Raul Valdez
- Department of Fish, Wildlife, and Conservation EcologyNew Mexico State UniversityLas CrucesNew MexicoUSA
| | - Victor Van Cakenberghe
- Laboratory for Functional Morphology, Biology DepartmentUniversity of Antwerp, Campus Drie EikenAntwerpen (Wilrijk)Belgium
| | - Geraldine Veron
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum national d'Histoire naturelle, CNRSSorbonne Université, EPHE, Université des AntillesParisFrance
| | | | - Rod Wells
- Biological Sciences, College of Science and EngineeringFlinders UniversityAdelaideSouth AustraliaAustralia
| | - Danielle Whittaker
- BEACON Center for the Study of Evolution in ActionMichigan State UniversityEast LansingMichiganUSA
| | | | - George Wittemyer
- Department of Fish, Wildlife and Conservation BiologyColorado State UniversityFort CollinsColoradoUSA
| | - John Woinarski
- Research Institute for the Environment and LivelihoodsCharles Darwin UniversityCasuarinaNorthern TerritoryAustralia
| | - Dietmar Zinner
- German Primate Center (DPZ)Leibniz Institute for Primate ResearchGöttingenGermany
| | - Nathan S. Upham
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
- School of Life SciencesArizona State UniversityTempeArizonaUSA
| | - Walter Jetz
- Department of Ecology and Evolutionary BiologyYale UniversityNew HavenConnecticutUSA
- Center for Biodiversity and Global ChangeYale UniversityNew HavenConnecticutUSA
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Anderson RC, Herrera M, Ilangakoon AD, Koya KM, Moazzam M, Mustika PL, Sutaria DN. Cetacean bycatch in Indian Ocean tuna gillnet fisheries. ENDANGER SPECIES RES 2020. [DOI: 10.3354/esr01008] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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5
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Brown TR, Edrington TS, Genovese KJ, He HL, Anderson RC, Nisbet DJ. Evaluation of the Efficacy of Three Direct Fed Microbial Cocktails To Reduce Fecal Shedding of Escherichia coli O157:H7 in Naturally Colonized Cattle and Fecal Shedding and Peripheral Lymph Node Carriage of Salmonella in Experimentally Infected Cattle. J Food Prot 2020; 83:28-36. [PMID: 31809195 DOI: 10.4315/0362-028x.jfp-19-208] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two experiments were conducted to evaluate the feeding of direct fed microbials (DFMs) on fecal shedding of Escherichia coli O157:H7 in naturally infected cattle (experiment I) and on Salmonella in the feces and peripheral lymph nodes (PLNs) of experimentally infected cattle (experiment II). Thirty cattle, 10 per treatment, were used in each experiment. Treatments in experiment I consisted of a control (lactose carrier only); DFM1, a 1:1 ratio of Enterococcus faecium and Lactobacillus animalis; and DFM2, a 1:1 ratio of Lactobacillus acidophilus and Pediococcus acidilactici. In Experiment II, DFM1 was replaced with DFM3, a 1:2 ratio of Lactobacillus reuteri and other Lactobacillus strains. Additives were mixed in water and applied as a top-dressing to each pen's daily ration for 50 days. Approximately half-way through each experiment, the DFM concentration was doubled for the remainder of the study. Fecal samples were collected throughout experiment I and cultured for E. coli O157:H7. Cattle in experiment II were inoculated intradermally with Salmonella Montevideo on days 32, 37, and 42 and then necropsied on days 49 and 50 (five cattle per treatment on each day). Innate immune function was assessed on days 29, 49, and 50. In experiment I, fecal concentration and prevalence of E. coli O157:H7 were not different (P > 0.10) nor was there an effect (P = 0.95) on the percentage of super shedders (cattle shedding ≥3.0 log CFU/g of feces). In experiment II, no treatment differences (P > 0.05) were observed for Salmonella in the PLNs except for the inguinal nodes, which had a significantly lower Salmonella prevalence in DFM-supplemented cattle than in the controls. Immune function, as measured by monocyte nitric oxide production and neutrophil oxidative burst, was decreased (P < 0.05) in the DFM treatment groups. Although results of this research indicate little to no effect of these DFMs on E. coli O157:H7 or Salmonella in cattle, an increase in the duration of administration to that similar to what is used for commercial cattle might elicit treatment differences.
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Affiliation(s)
- T R Brown
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845, USA
| | - T S Edrington
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845, USA
| | - K J Genovese
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845, USA
| | - H L He
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845, USA
| | - R C Anderson
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845, USA
| | - D J Nisbet
- U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845, USA
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Arzola-Alavarez C, Castillo-Castillo Y, Anderson RC, Hume ME, Ruiz-Barrera O, Min BR, Arzola-Rubio A, Beier RC, Salinas-Chavira J. Influence of Pine Bark Tannin on Bacterial Pathogens Growth and Nitrogen Compounds on Changes in Composted Poultry Litter. Braz J Poult Sci 2020. [DOI: 10.1590/1806-9061-2018-0911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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7
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Božić A, Anderson RC, Arzola-Alvarez C, Ruiz-Barrera O, Corral-Luna A, Castillo-Castillo Y, Arzola-Rubio A, Poole TL, Harvey RB, Hume ME, Beier RC, Nisbet DJ. Inhibition of multidrug-resistant Staphylococci by sodium chlorate and select nitro- and medium chain fatty acid compounds. J Appl Microbiol 2019; 126:1508-1518. [PMID: 30803130 DOI: 10.1111/jam.14232] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/13/2019] [Accepted: 02/20/2019] [Indexed: 11/28/2022]
Abstract
AIMS Determine the antimicrobial effects of 5 μmol ml-1 sodium chlorate, 9 μmol ml-1 nitroethane or 2-nitropropanol as well as lauric acid, myristic acid and the glycerol ester of lauric acid Lauricidin® , each at 5 mg ml-1 , against representative methicillin-resistant staphylococci, important mastitis- and opportunistic dermal-pathogens of humans and livestock. METHODS AND RESULTS Three methicillin-resistant Staphylococcus aureus and two methicillin-resistant coagulase-negative staphylococci were cultured at 39°C in 5 μmol ml-1 nitrate-supplemented half-strength Brain Heart Infusion broth treated without or with the potential inhibitors. Results revealed that 2-nitropropanol was the most potent and persistent of all compounds tested, achieving 58-99% decreases in mean specific growth rates and maximum optical densities when compared with untreated controls. Growth inhibition did not persist by cultures treated solely with chlorate or nitroethane, with adaptation occurring by different mechanisms after 7 h. Adaptation did not occur in cultures co-treated with nitroethane and chlorate. The medium chain fatty acid compounds had modest effects on all the staphylococci tested except the coagulase-negative Staphylococcus epidermidis strain NKR1. CONCLUSIONS The antimicrobial activity of nitrocompounds, chlorate and medium chain fatty acid compounds against different methicillin-resistant staphylococci varied in potency. SIGNIFICANCE AND IMPACT OF THE STUDY Results suggest that differential antimicrobial activities exhibited by mechanistically dissimilar inhibitors against methicillin-resistant staphylococci may yield potential opportunities to combine the treatments to overcome their individual limitations and broaden their activity against other mastitis and dermal pathogens.
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Affiliation(s)
- A Božić
- Faculty of Agriculture, University of Novi Sad, Novi Sad, Serbia
| | - R C Anderson
- United States Department of Agriculture/Agricultural Research Service, Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - C Arzola-Alvarez
- College of Animal Science and Ecology, Universidad Autónoma de Chihuahua, Chihuahua, México
| | - O Ruiz-Barrera
- College of Animal Science and Ecology, Universidad Autónoma de Chihuahua, Chihuahua, México
| | - A Corral-Luna
- College of Animal Science and Ecology, Universidad Autónoma de Chihuahua, Chihuahua, México
| | - Y Castillo-Castillo
- College of Animal Science and Ecology, Universidad Autónoma de Chihuahua, Chihuahua, México
| | - A Arzola-Rubio
- College of Animal Science and Ecology, Universidad Autónoma de Chihuahua, Chihuahua, México
| | - T L Poole
- United States Department of Agriculture/Agricultural Research Service, Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - R B Harvey
- United States Department of Agriculture/Agricultural Research Service, Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - M E Hume
- United States Department of Agriculture/Agricultural Research Service, Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - R C Beier
- United States Department of Agriculture/Agricultural Research Service, Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - D J Nisbet
- United States Department of Agriculture/Agricultural Research Service, Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, College Station, TX, USA
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Beier RC, Harvey RB, Poole TL, Hume ME, Crippen TL, Highfield LD, Alali WQ, Andrews K, Anderson RC, Nisbet DJ. Interactions of organic acids with vancomycin-resistant Enterococcus faecium isolated from community wastewater in Texas. J Appl Microbiol 2018; 126:480-488. [PMID: 30383327 DOI: 10.1111/jam.14145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/26/2018] [Accepted: 10/29/2018] [Indexed: 11/30/2022]
Abstract
AIMS Investigate the interactions of organic acids (OAs), acetic, butyric, citric, formic, lactic and propionic acid against 50 Gram-positive vancomycin-resistant Enterococcus faecium (VRE) strains to determine whether pH, undissociated or dissociated acid forms correlate with bacterial inhibition. METHODS AND RESULTS Concentrations of undissociated and dissociated OAs at the molar minimum inhibitory concentrations (MICM s) of the VRE were calculated using the Henderson-Hasselbalch equation. The pH at the MICM s of all VRE strains against acetic, butyric, formic and propionic acids was similar, 4·66 ± 0·07, but there was a 1·1 pH unit difference for all six OAs. Inhibition of VRE by all six OAs did not appear to be solely dependent on pH or on the undissociated OA species. The inhibition of VRE by all six dissociated acids was within Δ = 3·1 mmol l-1 . CONCLUSIONS Vancomycin-resistant Enterococcus faecium inhibition correlated with the dissociated OA species. A small decrease in the concentration of the dissociated OAs from optimum may result in allowing VRE strains to escape disinfection. SIGNIFICANCE AND IMPACT OF THE STUDY When an OA is used to disinfect VRE strains, the concentration of the dissociated OA should be carefully controlled. A concentration of at least 20 mmol l-1 dissociated OA should be maintained when disinfecting VRE.
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Affiliation(s)
- R C Beier
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - R B Harvey
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - T L Poole
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - M E Hume
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - T L Crippen
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
| | | | - W Q Alali
- Department of Veterinary Medicine, College of Food and Agriculture, United Arab Emirates University, Al Ain, United Arab Emirates
| | - K Andrews
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - R C Anderson
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
| | - D J Nisbet
- Food and Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, College Station, TX, USA
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Anderson RC, Armstrong KM, Young W, Maclean P, Thomas DG, Bermingham EN. Effect of kibble and raw meat diets on peripheral blood mononuclear cell gene expression profile in dogs. Vet J 2018; 234:7-10. [PMID: 29680397 DOI: 10.1016/j.tvjl.2018.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 01/22/2018] [Accepted: 01/24/2018] [Indexed: 02/03/2023]
Abstract
Peripheral blood mononuclear cell (PBMC) gene expression microarray profiling is a minimally invasive tool used in human diet intervention studies. In this study, PBMC gene expression was determined in dogs fed kibble or raw red meat diets for 9 weeks to test the hypothesis that diet influences canine immune cell gene expression profiles. The two diets were associated with differences in PBMC gene expression profiles, which corresponded with changes in plasma IgA concentrations. Analysis of PBMC gene expression profiles might provide useful insights into the long term effects of diet on health outcomes in dogs.
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Affiliation(s)
- R C Anderson
- Food Nutrition and Health Team, AgResearch, Palmerston North, New Zealand; Riddet Institute, Massey University, Palmerston North, New Zealand
| | - K M Armstrong
- Food Nutrition and Health Team, AgResearch, Palmerston North, New Zealand
| | - W Young
- Food Nutrition and Health Team, AgResearch, Palmerston North, New Zealand; Riddet Institute, Massey University, Palmerston North, New Zealand
| | - P Maclean
- Bioinformatics and Statistics Team, AgResearch, Lincoln, New Zealand
| | - D G Thomas
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
| | - E N Bermingham
- Food Nutrition and Health Team, AgResearch, Palmerston North, New Zealand.
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10
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Bell NL, Anderson RC, Callaway TR, Franco MO, Sawyer JE, Wickersham TA. Effect of monensin inclusion on intake, digestion, and ruminal fermentation parameters by Bos taurus indicus and Bos taurus taurus steers consuming bermudagrass hay. J Anim Sci 2018; 95:2736-2746. [PMID: 28727060 DOI: 10.2527/jas.2016.1011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Effects of monensin inclusion and cattle subspecies on utilization of bermudagrass hay (13.7% CP, 77.3% NDF, and 38.8% ADF) were evaluated using ruminally cannulated steers (5 [BI] and 5 [BT]; 398 kg BW). Subspecies were concurrently subjected to a 2-period, 2-treatment crossover design. Treatments were 0 (CON) or 200 mg·steer·d monensin (MON) in 0.91 kg dried distillers' grains with solubles. Periods were 70 d in length: 20 d of adaptation, 22 d of sample collection, and 28 d for withdrawal of treatment. Steers were group housed during adaptation and moved to individual covered pens for sampling. Hay, ort, and fecal grab samples were collected d 21 through 25 for determination of intake and digestion. Ruminal fluid was collected with a suction strainer 0, 2, 4, 8, and 12 h after feeding on d 42 for pH, VFA, and ruminal NH-N (RAN) analysis. Additionally, at h 2, ruminal fluid and contents were collected for determination of rate of NH production and CH production rate. No subspecies × monensin interactions were observed ( ≥ 0.12). Monensin had no effect ( ≥ 0.16) on intake or digestibility parameters. No subspecies effect ( ≥ 0.11) was observed for forage OM intake, total OM intake, or OM digestion. Total digestible OM intake tended to be greater ( = 0.06) for BT steers than for BI steers (14.0 vs. 12.2 g/kg BW). There was an effect of hour after feeding ( ≤ 0.01) on pH, total VFA, acetate:propionate ratio, and molar percent acetate and propionate. Total VFA concentration was greater ( = 0.01) in CON steers than in MON steers (66.5 vs. 62.0 m). Monensin decreased molar percent acetate ( = 0.02) from 72.5 to 71.2% and increased molar percent propionate ( < 0.01) from 16.9 to 18.7%, resulting in a reduced ( < 0.01) acetate:propionate ratio (from 4.34 to 3.85). Although not significantly ( = 0.19), monensin numerically reduced the CH production rate by 15.8%. Greater ( = 0.07) CH production rate tended to be observed in BI steers than in BT steers (21.4 vs. 16.6 μmol CH·mL·h, respectively). Monensin had no effect ( ≥ 0.32) on pH, RAN, or rate of NH production. A subspecies × hour after feeding interaction was observed for RAN, with BT having greater RAN at h 0 and 4, whereas BI had greater RAN at h 2, 8, and 12. Overall, monensin decreased the acetate:propionate ratio and total VFA concentration but had no effect on forage utilization. steers consumed less digestible OM and had a greater CH production rate compared with BT steers, suggesting BT were better able to utilize the available forage resource than BI.
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11
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Bell NL, Callaway TR, Anderson RC, Franco MO, Sawyer JE, Wickersham TA. Effect of monensin withdrawal on intake, digestion, and ruminal fermentation parameters by Bos taurus indicus and Bos taurus taurus steers consuming bermudagrass hay. J Anim Sci 2018; 95:2747-2757. [PMID: 28727043 DOI: 10.2527/jas.2016.1013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Effects of monensin withdrawal and cattle subspecies on the utilization of bermudagrass hay (14.3% CP, 72.3% NDF, and 36.9% ADF) were evaluated using ruminally cannulated steers (5 [BI] and 5 [BT]). Subspecies were concurrently subjected to a 2-period, 2-treatment crossover design. Treatments consisted of either 0 mg·steer·d-1 monensin with no previous monensin feeding (CON) or withdrawal from 200 mg·steer·d-1 monensin (MON) fed individually in 0.91 kg dried distillers' grains with solubles for 42 d. Withdrawal was evaluated for a 28-d period. Ruminal fluid was collected 2 h after feeding on d 0, 1, 4, 7, 14, and 21 after withdrawal for determination of pH, VFA, ruminal NH-N (RAN), rate of NH production, and CH production rate. Hay, ort, and fecal grab samples were collected d 23 through 28 after withdrawal for determination of intake and digestion. No subspecies × monensin, subspecies × day, or subspecies × monensin × day interactions were observed ( ≥ 0.11). An effect of day after monensin withdrawal was observed ( < 0.01) for total VFA concentration, with an increase following withdrawal followed by a decrease and then stabilization. Monensin × day after monensin withdrawal interactions ( ≤ 0.01) were observed for the acetate:propionate (A:P) ratio and molar percent of acetate and propionate. There was a decrease in molar percent of propionate between d 1 and 4 from 19.1 to 18.0; however, it remained greater ( ≤ 0.10) for MON than CON through d 7. Withdrawal increased molar percent of acetate from 68.3 to 69.8 between d 0 and 4 for MON steers. The A:P ratio was less ( ≤ 0.01) on d 0 for MON than for CON (3.4 vs. 4.0), but by d 4, it increased to 3.8 and was not different ( = 0.14) from CON. By d 14, no differences ( ≥ 0.88) remained for acetate, propionate, or the A:P ratio. After monensin withdrawal, monensin reduced ( < 0.01) RAN by 12.3% (2.09 vs. 1.83 m for CON and MON, respectively). Monensin withdrawal and cattle subspecies had no effect ( ≥ 0.23) on rate of NH production or CH production rate. Monensin withdrawal had no effect ( ≥ 0.45) on intake or digestibility parameters. Greater forage OM intake ( = 0.09; 21.2 vs. 19.2 g/kg BW) and OM digestibility ( < 0.01; 72.4 vs. 63.0%) resulted in greater ( < 0.01) total digestible OM intake (16.8 vs. 13.2 g/kg BW) in BT steers than in BI steers. These results suggest that BT steers are better able to utilize bermudagrass hay than BI steers. Upon monensin withdrawal, steers previously fed monensin continue to have a reduced A:P ratio for at least 7 d.
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Lester DF, Hodges KV, Anderson RC. Exploration telepresence: A strategy for optimizing scientific research at remote space destinations. Sci Robot 2017; 2:2/7/eaan4383. [PMID: 33157896 DOI: 10.1126/scirobotics.aan4383] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 05/19/2017] [Indexed: 11/02/2022]
Abstract
Modern telerobotic technologies offer astronaut scientists real-time presence on planetary surfaces without the risk and cost of putting them all the way there.
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Affiliation(s)
| | - Kip V Hodges
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85281, USA
| | - Robert C Anderson
- NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
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13
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Anderson RC. The man in the yellow slicker: A clinical chaplain's reflection on nursing and patient care. Nursing 2016; 46:45. [PMID: 27192072 DOI: 10.1097/01.nurse.0000482869.48085.0b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Robert C Anderson
- Robert C. Anderson is the director of Pastoral Care at Grandview Medical Center in Birmingham, Ala
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Levent G, Harvey RB, Ciftcioglu G, Beier RC, Genovese KJ, He HL, Anderson RC, Nisbet DJ. In Vitro Effects of Thymol-β-D-Glucopyranoside on Salmonella enterica Serovar Typhimurium and Escherichia coli K88. J Food Prot 2016; 79:299-303. [PMID: 26818992 DOI: 10.4315/0362-028x.jfp-15-360] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Although thymol is bactericidal against many pathogens in vitro, its in vivo effectiveness against pathogens in the lower gastrointestinal tract is limited because of its rapid absorption in the proximal gut. Thymol-β-<small>D</small>-glucopyranoside (β-thymol), a conjugated form of thymol, can deliver thymol to the lower gastrointestinal tract and has shown antibacterial effects. In the present study, we examined the in vitro effects of β-thymol on Salmonella enterica serovar Typhimurium (ST) and Escherichia coli K88 (K88). We inoculated one-half strength Mueller-Hinton broth with 5.8 ± 0.09 log CFU/ml novobiocin- and naladixic acid-resistant (NN) ST (NVSL 95-1776) and 5.1 ± 0.09 log CFU ml(-1) NN-resistant K88, with or without porcine feces (0.1% [wt/vol]) (fecal incubations). The resultant bacterial suspensions were distributed under N2 to triplicate sets of tubes to achieve initial concentrations of 0, 3, 6, and 12 mM for ST treatments and 0, 3, 12, and 30 mM for K88 treatments. Samples were incubated at 39°C and then plated onto NN-containing brilliant green agar and NN-containing MacConkey agar; ST and K88 CFU concentrations were determined via 10-fold dilutions, and viable cell counts were performed at 0, 6, and 24 h. No differences in ST CFU counts were observed in β-thymol-treated tubes without the added porcine feces (i.e., pure culture) at 6 or 24 h. However, in tubes that contained fecal incubations, ST CFU counts were reduced (P < 0.05) from controls at 6 h in tubes treated with 6 and 12 mM β-thymol, whereas in tubes treated with 3, 6, and 12 mM β-thymol the CFU counts were reduced (P < 0.05) at 24 h. No differences were observed in K88 CFU counts in pure culture or in fecal incubations at 6 h, but K88 CFU counts were reduced (P < 0.05) in both pure and fecal incubations at 24 h. The results from this study demonstrate that β-thymol, in the presence of fecal suspensions, has anti-Salmonella and anti-E. coli effects, suggesting a role of β-glycoside-hydrolyzing microbes for the release of bactericidal thymol from β-thymol.
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Affiliation(s)
- G Levent
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA; Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Istanbul University, 34320 Istanbul, Turkey
| | - R B Harvey
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA.
| | - G Ciftcioglu
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Istanbul University, 34320 Istanbul, Turkey
| | - R C Beier
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA
| | - K J Genovese
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA
| | - H L He
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA
| | - R C Anderson
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA
| | - D J Nisbet
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA
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Dalziel JE, Mohan V, Peters J, Anderson RC, Gopal PK, Roy NC. The probiotic Escherichia coli Nissle 1917 inhibits propagating colonic contractions in the rat isolated large intestine. Food Funct 2014; 6:257-64. [PMID: 25415771 DOI: 10.1039/c4fo00831f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The objective of this research was to test an in vitro motility model by investigating whether a probiotic that reduces diarrhea in humans would reduce motility in the rat colon in vitro. The probiotic Escherichia coli Nissle 1917 (EcN) the active ingredient in Mutaflor® was used as an example probiotic because it is effective for treating infectious diarrheal diseases. The effect of EcN on motility was compared in two colonic preparations. In distal colon segments EcN extract decreased the tension of spontaneous contractions by 74% and frequency by 46% compared with pre-treatment controls. In the whole large intestine the number of synchronized spontaneous propagating contractions decreased by 86% when EcN extract was applied externally and 69% when applied via the lumen compared with pre-treatment. From the inhibition produced by EcN extract in the distal colon segment a myogenic action was inferred and in the whole large intestine neural involvement was implicated. Both are consistent with its anti-diarrheal effect in humans.
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Affiliation(s)
- J E Dalziel
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch, Palmerston North, New Zealand.
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Lachlan RF, Anderson RC, Peters S, Searcy WA, Nowicki S. Typical versions of learned swamp sparrow song types are more effective signals than are less typical versions. Proc Biol Sci 2014; 281:20140252. [PMID: 24807252 DOI: 10.1098/rspb.2014.0252] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The learned songs of songbirds often cluster into population-wide types. Here, we test the hypothesis that male and female receivers respond differently to songs depending on how typical of those types they are. We used computational methods to cluster a large sample of swamp sparrow (Melospiza georgiana) songs into types and to estimate the degree to which individual song exemplars are typical of these types. We then played exemplars to male and female receivers. Territorial males responded more aggressively and captive females performed more sexual displays in response to songs that are highly typical than to songs that are less typical. Previous studies have demonstrated that songbirds distinguish song types that are typical for their species, or for their population, from those that are not. Our results show that swamp sparrows also discriminate typical from less typical exemplars within learned song-type categories. In addition, our results suggest that more typical versions of song types function better, at least in male-female communication. This finding is consistent with the hypothesis that syllable type typicality serves as a proxy for the assessment of song learning accuracy.
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Affiliation(s)
- R F Lachlan
- Department of Biology, Duke University, , Durham, NC 27708, USA, Department of Biology, University of Miami, , Coral Gables, FL 33124, USA, Department of Neurobiology, Duke University Medical School, , Durham, NC 27708, USA
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Webster CR, Mahaffy PR, Atreya SK, Flesch GJ, Farley KA, Kemppinen O, Bridges N, Johnson JR, Minitti M, Cremers D, Bell JF, Edgar L, Farmer J, Godber A, Wadhwa M, Wellington D, McEwan I, Newman C, Richardson M, Charpentier A, Peret L, King P, Blank J, Weigle G, Schmidt M, Li S, Milliken R, Robertson K, Sun V, Baker M, Edwards C, Ehlmann B, Farley K, Griffes J, Grotzinger J, Miller H, Newcombe M, Pilorget C, Rice M, Siebach K, Stack K, Stolper E, Brunet C, Hipkin V, Léveillé R, Marchand G, Sánchez PS, Favot L, Cody G, Steele A, Flückiger L, Lees D, Nefian A, Martin M, Gailhanou M, Westall F, Israël G, Agard C, Baroukh J, Donny C, Gaboriaud A, Guillemot P, Lafaille V, Lorigny E, Paillet A, Pérez R, Saccoccio M, Yana C, Armiens‐Aparicio C, Rodríguez JC, Blázquez IC, Gómez FG, Elvira JG, Hettrich S, Malvitte AL, Jiménez MM, Martínez-Frías J, Soler JM, Martín-Torres FJ, Jurado AM, Mora-Sotomayor L, Caro GM, López SN, Peinado-González V, Pla-García J, Manfredi JAR, Romeral-Planelló JJ, Fuentes SAS, Martinez ES, Redondo JT, Urqui-O'Callaghan R, Mier MPZ, Chipera S, Lacour JL, Mauchien P, Sirven JB, Manning H, Fairén A, Hayes A, Joseph J, Squyres S, Sullivan R, Thomas P, Dupont A, Lundberg A, Melikechi N, Mezzacappa A, DeMarines J, Grinspoon D, Reitz G, Prats B, Atlaskin E, Genzer M, Harri AM, Haukka H, Kahanpää H, Kauhanen J, Kemppinen O, Paton M, Polkko J, Schmidt W, Siili T, Fabre C, Wray J, Wilhelm MB, Poitrasson F, Patel K, Gorevan S, Indyk S, Paulsen G, Gupta S, Bish D, Schieber J, Gondet B, Langevin Y, Geffroy C, Baratoux D, Berger G, Cros A, d’Uston C, Forni O, Gasnault O, Lasue J, Lee QM, Maurice S, Meslin PY, Pallier E, Parot Y, Pinet P, Schröder S, Toplis M, Lewin É, Brunner W, Heydari E, Achilles C, Oehler D, Sutter B, Cabane M, Coscia D, Israël G, Szopa C, Dromart G, Robert F, Sautter V, Le Mouélic S, Mangold N, Nachon M, Buch A, Stalport F, Coll P, François P, Raulin F, Teinturier S, Cameron J, Clegg S, Cousin A, DeLapp D, Dingler R, Jackson RS, Johnstone S, Lanza N, Little C, Nelson T, Wiens RC, Williams RB, Jones A, Kirkland L, Treiman A, Baker B, Cantor B, Caplinger M, Davis S, Duston B, Edgett K, Fay D, Hardgrove C, Harker D, Herrera P, Jensen E, Kennedy MR, Krezoski G, Krysak D, Lipkaman L, Malin M, McCartney E, McNair S, Nixon B, Posiolova L, Ravine M, Salamon A, Saper L, Stoiber K, Supulver K, Van Beek J, Van Beek T, Zimdar R, French KL, Iagnemma K, Miller K, Summons R, Goesmann F, Goetz W, Hviid S, Johnson M, Lefavor M, Lyness E, Breves E, Dyar MD, Fassett C, Blake DF, Bristow T, DesMarais D, Edwards L, Haberle R, Hoehler T, Hollingsworth J, Kahre M, Keely L, McKay C, Wilhelm MB, Bleacher L, Brinckerhoff W, Choi D, Conrad P, Dworkin JP, Eigenbrode J, Floyd M, Freissinet C, Garvin J, Glavin D, Harpold D, Jones A, Mahaffy P, Martin DK, McAdam A, Pavlov A, Raaen E, Smith MD, Stern J, Tan F, Trainer M, Meyer M, Posner A, Voytek M, Anderson RC, Aubrey A, Beegle LW, Behar A, Blaney D, Brinza D, Calef F, Christensen L, Crisp JA, DeFlores L, Ehlmann B, Feldman J, Feldman S, Flesch G, Hurowitz J, Jun I, Keymeulen D, Maki J, Mischna M, Morookian JM, Parker T, Pavri B, Schoppers M, Sengstacken A, Simmonds JJ, Spanovich N, Juarez MDLT, Vasavada AR, Webster CR, Yen A, Archer PD, Cucinotta F, Jones JH, Ming D, Morris RV, Niles P, Rampe E, Nolan T, Fisk M, Radziemski L, Barraclough B, Bender S, Berman D, Dobrea EN, Tokar R, Vaniman D, Williams RME, Yingst A, Lewis K, Leshin L, Cleghorn T, Huntress W, Manhès G, Hudgins J, Olson T, Stewart N, Sarrazin P, Grant J, Vicenzi E, Wilson SA, Bullock M, Ehresmann B, Hamilton V, Hassler D, Peterson J, Rafkin S, Zeitlin C, Fedosov F, Golovin D, Karpushkina N, Kozyrev A, Litvak M, Malakhov A, Mitrofanov I, Mokrousov M, Nikiforov S, Prokhorov V, Sanin A, Tretyakov V, Varenikov A, Vostrukhin A, Kuzmin R, Clark B, Wolff M, McLennan S, Botta O, Drake D, Bean K, Lemmon M, Schwenzer SP, Anderson RB, Herkenhoff K, Lee EM, Sucharski R, Hernández MÁDP, Ávalos JJB, Ramos M, Kim MH, Malespin C, Plante I, Muller JP, Navarro-González R, Ewing R, Boynton W, Downs R, Fitzgibbon M, Harshman K, Morrison S, Dietrich W, Kortmann O, Palucis M, Sumner DY, Williams A, Lugmair G, Wilson MA, Rubin D, Jakosky B, Balic-Zunic T, Frydenvang J, Jensen JK, Kinch K, Koefoed A, Madsen MB, Stipp SLS, Boyd N, Campbell JL, Gellert R, Perrett G, Pradler I, VanBommel S, Jacob S, Owen T, Rowland S, Atlaskin E, Savijärvi H, Boehm E, Böttcher S, Burmeister S, Guo J, Köhler J, García CM, Mueller-Mellin R, Wimmer-Schweingruber R, Bridges JC, McConnochie T, Benna M, Franz H, Bower H, Brunner A, Blau H, Boucher T, Carmosino M, Atreya S, Elliott H, Halleaux D, Rennó N, Wong M, Pepin R, Elliott B, Spray J, Thompson L, Gordon S, Newsom H, Ollila A, Williams J, Vasconcelos P, Bentz J, Nealson K, Popa R, Kah LC, Moersch J, Tate C, Day M, Kocurek G, Hallet B, Sletten R, Francis R, McCullough E, Cloutis E, ten Kate IL, Kuzmin R, Arvidson R, Fraeman A, Scholes D, Slavney S, Stein T, Ward J, Berger J, Moores JE. Low Upper Limit to Methane Abundance on Mars. Science 2013; 342:355-7. [DOI: 10.1126/science.1242902] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
| | | | - Sushil K. Atreya
- Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| | - Gregory J. Flesch
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
| | - Kenneth A. Farley
- Department of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
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Stolper EM, Baker MB, Newcombe ME, Schmidt ME, Treiman AH, Cousin A, Dyar MD, Fisk MR, Gellert R, King PL, Leshin L, Maurice S, McLennan SM, Minitti ME, Perrett G, Rowland S, Sautter V, Wiens RC, Kemppinen O, Bridges N, Johnson JR, Cremers D, Bell JF, Edgar L, Farmer J, Godber A, Wadhwa M, Wellington D, McEwan I, Newman C, Richardson M, Charpentier A, Peret L, Blank J, Weigle G, Li S, Milliken R, Robertson K, Sun V, Edwards C, Ehlmann B, Farley K, Griffes J, Grotzinger J, Miller H, Pilorget C, Rice M, Siebach K, Stack K, Brunet C, Hipkin V, Léveillé R, Marchand G, Sánchez PS, Favot L, Cody G, Steele A, Flückiger L, Lees D, Nefian A, Martin M, Gailhanou M, Westall F, Israël G, Agard C, Baroukh J, Donny C, Gaboriaud A, Guillemot P, Lafaille V, Lorigny E, Paillet A, Pérez R, Saccoccio M, Yana C, Armiens‐Aparicio C, Rodríguez JC, Blázquez IC, Gómez FG, Gómez-Elvira J, Hettrich S, Malvitte AL, Jiménez MM, Martínez-Frías J, Martín-Soler J, Martín-Torres FJ, Jurado AM, Mora-Sotomayor L, Caro GM, López SN, Peinado-González V, Pla-García J, Manfredi JAR, Romeral-Planelló JJ, Fuentes SAS, Martinez ES, Redondo JT, Urqui-O'Callaghan R, Mier MPZ, Chipera S, Lacour JL, Mauchien P, Sirven JB, Manning H, Fairén A, Hayes A, Joseph J, Squyres S, Sullivan R, Thomas P, Dupont A, Lundberg A, Melikechi N, Mezzacappa A, DeMarines J, Grinspoon D, Reitz G, Prats B, Atlaskin E, Genzer M, Harri AM, Haukka H, Kahanpää H, Kauhanen J, Kemppinen O, Paton M, Polkko J, Schmidt W, Siili T, Fabre C, Wray J, Wilhelm MB, Poitrasson F, Patel K, Gorevan S, Indyk S, Paulsen G, Gupta S, Bish D, Schieber J, Gondet B, Langevin Y, Geffroy C, Baratoux D, Berger G, Cros A, d’Uston C, Forni O, Gasnault O, Lasue J, Lee QM, Meslin PY, Pallier E, Parot Y, Pinet P, Schröder S, Toplis M, Lewin É, Brunner W, Heydari E, Achilles C, Oehler D, Sutter B, Cabane M, Coscia D, Israël G, Szopa C, Teinturier S, Dromart G, Robert F, Le Mouélic S, Mangold N, Nachon M, Buch A, Stalport F, Coll P, François P, Raulin F, Cameron J, Clegg S, DeLapp D, Dingler R, Jackson RS, Johnstone S, Lanza N, Little C, Nelson T, Williams RB, Kirkland L, Baker B, Cantor B, Caplinger M, Davis S, Duston B, Edgett K, Fay D, Hardgrove C, Harker D, Herrera P, Jensen E, Kennedy MR, Krezoski G, Krysak D, Lipkaman L, Malin M, McCartney E, McNair S, Nixon B, Posiolova L, Ravine M, Salamon A, Saper L, Stoiber K, Supulver K, Van Beek J, Van Beek T, Zimdar R, French KL, Iagnemma K, Miller K, Summons R, Goesmann F, Goetz W, Hviid S, Johnson M, Lefavor M, Lyness E, Breves E, Fassett C, Blake DF, Bristow T, DesMarais D, Edwards L, Haberle R, Hoehler T, Hollingsworth J, Kahre M, Keely L, McKay C, Wilhelm MB, Bleacher L, Brinckerhoff W, Choi D, Conrad P, Dworkin JP, Eigenbrode J, Floyd M, Freissinet C, Garvin J, Glavin D, Harpold D, Mahaffy P, Martin DK, McAdam A, Pavlov A, Raaen E, Smith MD, Stern J, Tan F, Trainer M, Meyer M, Posner A, Voytek M, Anderson RC, Aubrey A, Beegle LW, Behar A, Blaney D, Brinza D, Calef F, Christensen L, Crisp J, DeFlores L, Ehlmann B, Feldman J, Feldman S, Flesch G, Hurowitz J, Jun I, Keymeulen D, Maki J, Mischna M, Morookian JM, Parker T, Pavri B, Schoppers M, Sengstacken A, Simmonds JJ, Spanovich N, Juarez MDLT, Vasavada A, Webster CR, Yen A, Archer PD, Cucinotta F, Jones JH, Ming D, Morris RV, Niles P, Rampe E, Nolan T, Radziemski L, Barraclough B, Bender S, Berman D, Dobrea EN, Tokar R, Vaniman D, Williams RME, Yingst A, Lewis K, Cleghorn T, Huntress W, Manhès G, Hudgins J, Olson T, Stewart N, Sarrazin P, Grant J, Vicenzi E, Wilson SA, Bullock M, Ehresmann B, Hamilton V, Hassler D, Peterson J, Rafkin S, Zeitlin C, Fedosov F, Golovin D, Karpushkina N, Kozyrev A, Litvak M, Malakhov A, Mitrofanov I, Mokrousov M, Nikiforov S, Prokhorov V, Sanin A, Tretyakov V, Varenikov A, Vostrukhin A, Kuzmin R, Clark B, Wolff M, Botta O, Drake D, Bean K, Lemmon M, Schwenzer SP, Anderson RB, Herkenhoff K, Lee EM, Sucharski R, Hernández MÁDP, Ávalos JJB, Ramos M, Jones A, Kim MH, Malespin C, Plante I, Muller JP, Navarro-González R, Ewing R, Boynton W, Downs R, Fitzgibbon M, Harshman K, Morrison S, Dietrich W, Kortmann O, Palucis M, Sumner DY, Williams A, Lugmair G, Wilson MA, Rubin D, Jakosky B, Balic-Zunic T, Frydenvang J, Jensen JK, Kinch K, Koefoed A, Madsen MB, Stipp SLS, Boyd N, Campbell JL, Pradler I, VanBommel S, Jacob S, Owen T, Atlaskin E, Savijärvi H, Boehm E, Böttcher S, Burmeister S, Guo J, Köhler J, García CM, Mueller-Mellin R, Wimmer-Schweingruber R, Bridges JC, McConnochie T, Benna M, Franz H, Bower H, Brunner A, Blau H, Boucher T, Carmosino M, Atreya S, Elliott H, Halleaux D, Rennó N, Wong M, Pepin R, Elliott B, Spray J, Thompson L, Gordon S, Newsom H, Ollila A, Williams J, Vasconcelos P, Bentz J, Nealson K, Popa R, Kah LC, Moersch J, Tate C, Day M, Kocurek G, Hallet B, Sletten R, Francis R, McCullough E, Cloutis E, ten Kate IL, Kuzmin R, Arvidson R, Fraeman A, Scholes D, Slavney S, Stein T, Ward J, Berger J, Moores JE. The Petrochemistry of Jake_M: A Martian Mugearite. Science 2013; 341:1239463. [DOI: 10.1126/science.1239463] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | | | | | - M. E. Schmidt
- Brock University, St. Catharines, Ontario L2T 3V8, Canada
| | - A. H. Treiman
- Lunar and Planetary Institute, Houston, TX 77058, USA
| | - A. Cousin
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
- Institut de Recherches en Astrophysique et Planétologie, 31028 Toulouse, France
| | - M. D. Dyar
- Mount Holyoke College, South Hadley, MA 01075, USA
| | - M. R. Fisk
- Oregon State University, Corvallis, OR 97331, USA
| | - R. Gellert
- University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - P. L. King
- Research School of Earth Sciences, Australian National University, Acton, ACT 0200, Australia
| | - L. Leshin
- Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - S. Maurice
- Institut de Recherches en Astrophysique et Planétologie, 31028 Toulouse, France
| | - S. M. McLennan
- The State University of New York, Stony Brook, NY 11794, USA
| | - M. E. Minitti
- Applied Physics Laboratory, The Johns Hopkins University, Baltimore, MD 20723, USA
| | - G. Perrett
- University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - S. Rowland
- University of Hawaii, Honolulu, HI 96822, USA
| | - V. Sautter
- Laboratoire de Minéralogie et Cosmochimie du Muséum, 75005 Paris, France
| | - R. C. Wiens
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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Edrington TS, Loneragan GH, Hill J, Genovese KJ, Brichta-Harhay DM, Farrow RL, Krueger NA, Callaway TR, Anderson RC, Nisbet DJ. Development of challenge models to evaluate the efficacy of a vaccine to reduce carriage of Salmonella in peripheral lymph nodes of cattle. J Food Prot 2013; 76:1259-63. [PMID: 23834803 DOI: 10.4315/0362-028x.jfp-12-319] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Because challenge models to infect peripheral lymph nodes (PLNs) with Salmonella have not been reported, we performed a series of experiments to develop and refine challenge models to evaluate an intervention applied at the animal level and to provide initial estimates of efficacy of an intervention (i.e., a vaccine) to aid in the design of future studies. In each of four experiments, steers (control or vaccinated) were inoculated with Salmonella strains Montevideo or Newport, and in experiment IV, Salmonella Senftenberg was also used. Calves were euthanized 14 to 42 days postinoculation, and PLNs were collected. In the first experiment, calves were challenged with ∼10¹⁰ Salmonella cells, and few treatment differences were observed 14 days postchallenge. However, by day 21, Salmonella Newport was recovered from fewer vaccinated calves than control calves (P < 0.05). In experiment II, calves were challenged with ∼10⁷ Salmonella cells and, after two necropsies (14 and 28 days postchallenge), only one lymph node was Salmonella positive; therefore, the study was terminated. In experiment III, calves were again challenged with ∼10¹⁰ Salmonella cells, and no significant effect of vaccine was observed in calves challenged with Montevideo or Newport strains. A transdermal route of challenge was explored in experiment IV, using a 10-lancet, allergy testing instrument. Sixteen steers were challenged with either Salmonella Newport or Salmonella Montevideo (Salmonella Newport right legs; Salmonella Montevideo left legs), and all steers were challenged on the lower abdomen with Salmonella Senftenberg. Transdermal inoculation resulted in predictably Salmonella-positive PLNs, and a modest vaccine effect was detected. Because it is well tolerated by the calves and results in predictable and regionally specific Salmonella recovery from PLNs, the transdermal route of challenge may be preferred by researchers wishing to evaluate the impact of interventions designed to reduce the carriage of Salmonella in PLNs.
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Affiliation(s)
- T S Edrington
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA.
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Edrington TS, Loneragan GH, Hill J, Genovese KJ, He H, Callaway TR, Anderson RC, Brichta-Harhay DM, Nisbet DJ. Development of a transdermal Salmonella challenge model in calves. J Food Prot 2013; 76:1255-8. [PMID: 23834802 DOI: 10.4315/0362-028x.jfp-12-317] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Recent investigations have found that Salmonella can be routinely recovered from peripheral lymph nodes (PLNs) of cattle presented for harvest. When contained within the PLNs, this foodborne pathogen is protected from currently used postharvest, inplant intervention strategies and, therefore, PLNs harboring Salmonella may be a potential contaminant of ground beef. The objective of this work was to develop a challenge model that effectively and repeatedly results in Salmonella -positive PLNs. A 10-lancet skin-allergy instrument was inoculated with Salmonella, and calves were inoculated intra- and/or transdermally by applying the device over various ventral regions of the skin. Salmonella was successfully and predictably recovered from regionspecific PLNs up to 8 days postchallenge. Furthermore, serotypes inoculated within specific regions were only recovered from the PLNs draining those regions. This model provides a method to predictably infect PLNs with Salmonella. Further, this model makes it possible to determine the duration of infection and to evaluate candidate interventions that may shorten the duration of infection.
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Affiliation(s)
- T S Edrington
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, Agricultural Research Service, U.S. Department of Agriculture, 2881 F&B Road, College Station, Texas 77845, USA.
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Kriticos DJ, Morin L, Leriche A, Anderson RC, Caley P. Combining a climatic niche model of an invasive fungus with its host species distributions to identify risks to natural assets: Puccinia psidii Sensu Lato in Australia. PLoS One 2013; 8:e64479. [PMID: 23704988 PMCID: PMC3660372 DOI: 10.1371/journal.pone.0064479] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 04/15/2013] [Indexed: 11/18/2022] Open
Abstract
Puccinia psidii sensu lato (s.l.) is an invasive rust fungus threatening a wide range of plant species in the family Myrtaceae. Originating from Central and South America, it has invaded mainland USA and Hawai'i, parts of Asia and Australia. We used CLIMEX to develop a semi-mechanistic global climatic niche model based on new data on the distribution and biology of P. psidii s.l. The model was validated using independent distribution data from recently invaded areas in Australia, China and Japan. We combined this model with distribution data of its potential Myrtaceae host plant species present in Australia to identify areas and ecosystems most at risk. Myrtaceaeous species richness, threatened Myrtaceae and eucalypt plantations within the climatically suitable envelope for P. psidii s.l in Australia were mapped. Globally the model identifies climatically suitable areas for P. psidii s.l. throughout the wet tropics and sub-tropics where moist conditions with moderate temperatures prevail, and also into some cool regions with a mild Mediterranean climate. In Australia, the map of species richness of Myrtaceae within the P. psidii s.l. climatic envelope shows areas where epidemics are hypothetically more likely to be frequent and severe. These hotspots for epidemics are along the eastern coast of New South Wales, including the Sydney Basin, in the Brisbane and Cairns areas in Queensland, and in the coastal region from the south of Bunbury to Esperance in Western Australia. This new climatic niche model for P. psidii s.l. indicates a higher degree of cold tolerance; and hence a potential range that extends into higher altitudes and latitudes than has been indicated previously. The methods demonstrated here provide some insight into the impacts an invasive species might have within its climatically suited range, and can help inform biosecurity policies regarding the management of its spread and protection of valued threatened assets.
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Affiliation(s)
- Darren J Kriticos
- Commonwealth Scientific and Industrial Research Organisation, Ecosystem Sciences, Canberra, Australian Capital Territory, Australia.
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Edwards HD, Anderson RC, Miller RK, Taylor TM, Hardin MD, Smith SB, Krueger NA, Nisbet DJ. Glycerol inhibition of ruminal lipolysis in vitro. J Dairy Sci 2013; 95:5176-5181. [PMID: 22916923 DOI: 10.3168/jds.2011-5236] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 04/29/2012] [Indexed: 11/19/2022]
Abstract
Supplemental glycerol inhibits rumen lipolysis, a prerequisite for rumen biohydrogenation, which is responsible for the saturation of dietary fatty acids consumed by ruminant animals. Feeding excess glycerol, however, adversely affects dry matter digestibility. To more clearly define the effect of supplemental glycerol on rumen lipolysis, mixed populations of ruminal bacteria were incubated with 6 or 20% glycerol (vol/vol). After 48-h anaerobic incubation of mixed culture rumen fluid, rates of free fatty acid production (nmol/mL per h) for the 6 and 20% glycerol-supplemented samples were decreased by 80 and 86%, respectively, compared with rates from nonsupplemented control cultures (12.4±1.0; mean ± SE). Conversely, assay of the prominent ruminal lipase-producing bacteria Anaerovibrio lipolyticus 5S, Butyrivibrio fibrisolvens 49, and Propionibacterium species avidum and acnes revealed no effect of 2 or 10% (vol/vol) added glycerol on lipolytic activity by these organisms. Supplementing glycerol at 6% on a vol/vol basis, equivalent to supplementing glycerol at approximately 8 to 15% of diet dry matter, effectively reduced lipolysis. However, the mechanism of glycerol inhibition of ruminal lipolysis remains to be demonstrated.
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Affiliation(s)
- H D Edwards
- Department of Animal Science, Texas A&M University, College Station 77843
| | - R C Anderson
- United States Department of Agriculture/Agricultural Research Service, Southern Plains Agricultural Research Center, Food & Feed Safety Research Unit, 2881 F&B Road, College Station, TX 77845.
| | - R K Miller
- Department of Animal Science, Texas A&M University, College Station 77843
| | - T M Taylor
- Department of Animal Science, Texas A&M University, College Station 77843
| | - M D Hardin
- Department of Animal Science, Texas A&M University, College Station 77843
| | - S B Smith
- Department of Animal Science, Texas A&M University, College Station 77843
| | - N A Krueger
- United States Department of Agriculture/Agricultural Research Service, Southern Plains Agricultural Research Center, Food & Feed Safety Research Unit, 2881 F&B Road, College Station, TX 77845
| | - D J Nisbet
- United States Department of Agriculture/Agricultural Research Service, Southern Plains Agricultural Research Center, Food & Feed Safety Research Unit, 2881 F&B Road, College Station, TX 77845
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Edrington TS, Dowd SE, Farrow RF, Hagevoort GR, Callaway TR, Anderson RC, Nisbet DJ. Development of colonic microflora as assessed by pyrosequencing in dairy calves fed waste milk. J Dairy Sci 2012; 95:4519-25. [PMID: 22818466 DOI: 10.3168/jds.2011-5119] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 04/04/2012] [Indexed: 01/07/2023]
Abstract
The objective of the current study was to examine the effect of pasteurization of waste milk, used to feed dairy calves, on the bacterial diversity of their lower gut. Using 16S rDNA bacterial tag-encoded FLX amplicon pyrosequencing, fecal samples from dairy calves, ages 1 wk to 6 mo old and fed either pasteurized or nonpasteurized waste milk, were analyzed for bacterial diversity. Calves were maintained on 2 separate farms and, aside from how the waste milk was treated, were housed and cared for similarly. Fifteen calves were sampled from each age group (1, 2, and 4 wk, and 2, 4, and 6 mo of age; n=90 samples per milk treatment, 180 total samples) on each farm via rectal palpation and the samples shipped and frozen before analysis. In general, bacterial diversity, as represented by the total number of different species, was greater for the calves fed pasteurized waste milk at all ages (except 1 wk of age) and increased with increasing age in both treatments. Proteobacteria, Bacteroidetes, and Firmicutes were the predominant phyla. Differences in phyla and class were observed among treatments and age of calf but with no consistent trends. Salmonella were detected in 9 out of 14 (64%) of the 1-wk-old calves fed nonpasteurized milk. Treponema, an important beneficial bacterium in cattle rumen, was more prevalent in the pasteurized waste milk-fed animals and became higher in the older animals from this group. Escherichia-Shigella were detected among treatments at all ages, and highest at 1 wk of age, averaging approximately 21 and 20% of all bacteria for calves fed pasteurized and nonpasteurized waste milk, respectively, and decreasing as calves aged (2.6 and 1.3%). The consistent detection of Salmonella in the younger animals fed nonpasteurized milk and its absence in all other groups is an important finding related to this feeding practice.
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Affiliation(s)
- T S Edrington
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, USDA-ARS, College Station, TX 77845, USA.
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Edrington TS, Farrow RL, Hume ME, Anderson PN, Hagevoort GR, Caldwell DJ, Callaway TR, Anderson RC, Nisbet DJ. Evaluation of the potential antimicrobial resistance transfer from a multi-drug resistant Escherichia coli to Salmonella in dairy calves. Curr Microbiol 2012; 66:132-7. [PMID: 23086537 DOI: 10.1007/s00284-012-0249-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 09/25/2012] [Indexed: 01/18/2023]
Abstract
Previous research conducted in our laboratory found a significant prevalence of multi-drug resistant (MDR) Salmonella and MDR Escherichia coli (MDR EC) in dairy calves and suggests that the MDR EC population may be an important reservoir for resistance elements that could potentially transfer to Salmonella. Therefore, the objective of the current research was to determine if resistance transfers from MDR EC to susceptible strains of inoculated Salmonella. The experiment utilized Holstein calves (approximately 3 weeks old) naturally colonized with MDR EC and fecal culture negative for Salmonella. Fecal samples were collected for culture of Salmonella and MDR EC throughout the experiment following experimental inoculation with the susceptible Salmonella strains. Results initially suggested that resistance did transfer from the MDR E. coli to the inoculated strains of Salmonella, with these stains demonstrating resistance to multiple antibiotics following in vivo exposure to MDR EC. However, serogrouping and serotyping results from a portion of the Salmonella isolates recovered from the calves post-challenge, identified two new strains of Salmonella; therefore transfer of resistance was not demonstrated under these experimental conditions.
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Affiliation(s)
- T S Edrington
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, USDA-ARS, 2881 F&B Road, College Station, TX, 77845, USA.
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Estlin TA, Bornstein BJ, Gaines DM, Anderson RC, Thompson DR, Burl M, Castaño R, Judd M. AEGIS Automated Science Targeting for the MER Opportunity Rover. ACM T INTEL SYST TEC 2012. [DOI: 10.1145/2168752.2168764] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The Autonomous Exploration for Gathering Increased Science (AEGIS) system enables automated data collection by planetary rovers. AEGIS software was uploaded to the Mars Exploration Rover (MER) mission’s Opportunity rover in December 2009 and has successfully demonstrated automated onboard targeting based on scientist-specified objectives. Prior to AEGIS, images were transmitted from the rover to the operations team on Earth; scientists manually analyzed the images, selected geological targets for the rover’s remote-sensing instruments, and then generated a command sequence to execute the new measurements. AEGIS represents a significant paradigm shift---by using onboard data analysis techniques, the AEGIS software uses scientist input to select high-quality science targets with no human in the loop. This approach allows the rover to autonomously select and sequence targeted observations in an opportunistic fashion, which is particularly applicable for narrow field-of-view instruments (such as the MER Mini-TES spectrometer, the MER Panoramic camera, and the 2011 Mars Science Laboratory (MSL) ChemCam spectrometer). This article provides an overview of the AEGIS automated targeting capability and describes how it is currently being used onboard the MER mission Opportunity rover.
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Affiliation(s)
- Tara A. Estlin
- Jet Propulsion Laboratory, California Institute of Technology
| | | | | | | | | | - Michael Burl
- Jet Propulsion Laboratory, California Institute of Technology
| | - Rebecca Castaño
- Jet Propulsion Laboratory, California Institute of Technology
| | - Michele Judd
- Jet Propulsion Laboratory, California Institute of Technology
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Farrow RL, Edrington TS, Krueger NA, Genovese KJ, Callaway TR, Anderson RC, Nisbet DJ. Lack of effect of feeding citrus by-products in reducing salmonella in experimentally infected weanling pigs. J Food Prot 2012; 75:573-5. [PMID: 22410233 DOI: 10.4315/0362-028x.jfp-11-416] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of the current research was to determine if feeding the citrus by-products(D) -limonene (DL) and citrus molasses would reduce the concentration and prevalence of Salmonella in weanling pigs experimentally infected with Salmonella Typhimurium. Twenty crossbred weanling pigs (average body weight [BW], 19.9 kg) were randomly assigned to one of four treatments: control, low-dose DL (1.5 ml/kg of BW per day), high-dose DL (3.0 ml/kg of BW per day), and citrus molasses (0.05 kg/kg of BW per day). Treatments were administered in the feed (twice daily) for 7 days, with one-half of the dose administered at each feeding. Fecal samples were collected twice daily (prior to administration of treatment) and cultured for quantitative and qualitative determination of the challenge strain of Salmonella. Upon termination of the study, pigs were euthanized and tissues from the stomach, ileum, cecum, spiral colon, and rectum, as well as luminal contents, were collected. In addition, the popliteal and ileocecal lymph nodes and liver, spleen, and tonsil tissue were collected for qualitative Salmonella culture. No significant treatment differences (P > 0.05) were observed among treatments for fecal concentration or prevalence of Salmonella throughout the 7-day collection period. Likewise, no treatment differences (P > 0.05) were observed for any of the tissue or luminal content samples collected. Salmonella was not cultured from the muscle-bound popliteal lymph node but was cultured from the mesenteric ileocecal lymph nodes. While there were no effects in the current experiment, future research may examine the effect of a lower challenge dose and/or different administration (dose or duration) of the citrus by-products.
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Affiliation(s)
- R L Farrow
- Food and Feed Safety Research Unit, Agricultural Research Service, U.S. Department of Agriculture, College Station, Texas 77845, USA
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Nesnas IA, Matthews JB, Abad-Manterola P, Burdick JW, Edlund JA, Morrison JC, Peters RD, Tanner MM, Miyake RN, Solish BS, Anderson RC. Axel and DuAxel rovers for the sustainable exploration of extreme terrains. J FIELD ROBOT 2012. [DOI: 10.1002/rob.21407] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Nerren JR, Edrington TS, Bernstein LR, Farrow RL, Genovese KG, Callaway TR, Anderson RC, Krueger NA, Duke SE, Nisbet DJ. Evaluation of the effect of gallium maltolate on fecal Salmonella shedding in cattle. J Food Prot 2011; 74:524-30. [PMID: 21477464 DOI: 10.4315/0362-028x.jfp-10-298] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Strategies aimed at reducing fecal shedding of Salmonella and other foodborne pathogens may be effective for limiting transmission of pathogens from food animals to humans. The objective of this study was to determine the effectiveness of gallium maltolate (GaM) against Salmonella in vitro and to determine whether oral administration of GaM would reduce fecal shedding of Salmonella in cattle. Gallium is a semimetal exhibiting antimicrobial properties against some pathogenic bacteria, including Salmonella, by exploiting their need for iron to survive and replicate. In vitro growth studies were performed in pure cultures of Salmonella and in mixed cultures from ruminal fluid. Inclusion of GaM in culture medium or in mixed cultures of ruminal fluid resulted in a significant reduction in growth of Salmonella, suggesting that GaM may be effective for limiting growth and survival in vivo. Therefore, we subsequently administered two doses of GaM to Holstein steers, experimentally infected them with Salmonella, and quantitatively and qualitatively monitored fecal shedding at 12-h intervals. Sixty hours after beginning treatment, cattle were euthanized, and luminal contents and tissue were aseptically harvested from the rumen, jejunum, spiral colon, cecum, and rectum. The luminal contents were processed for quantitative and qualitative analysis of the challenge strains of Salmonella, and tissue samples were enriched and plated for qualitative analysis. We found no significant differences between control and treated animals in quantitative levels of Salmonella in the feces or the luminal contents. Likewise, we observed no pattern between control and treated animals in the frequency of positive or negative results from enriched feces, luminal contents, or tissue samples. These results suggest that GaM was not effective for reducing Salmonella in cattle.
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Affiliation(s)
- J R Nerren
- U.S. Department of Agriculture, Agriculture Research Service, Southern Plains Agricultural Research Center, Food and Feed Safety Research Unit, 2881 F&B Road, College Station, Texas 77845, USA
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Krueger NA, Anderson RC, Tedeschi LO, Callaway TR, Edrington TS, Nisbet DJ. Evaluation of feeding glycerol on free-fatty acid production and fermentation kinetics of mixed ruminal microbes in vitro. Bioresour Technol 2010; 101:8469-8472. [PMID: 20580225 DOI: 10.1016/j.biortech.2010.06.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Revised: 05/21/2010] [Accepted: 06/02/2010] [Indexed: 05/29/2023]
Abstract
Ruminant-derived foods contain high proportions of saturated fats as a result of ruminal biohydrogenation that rapidly saturates and thus limits the availability of free unsaturated fatty acids for assimilation. The objective of this study was to evaluate the effects of glycerol on ruminal free-fatty acid (FFA) production rates and in vitro fermentation kinetics of alfalfa hay. In vitro incubations demonstrated 48% and 77% reductions in rates of FFA accumulation in incubations supplemented with 2% and 20% glycerol as compared to controls. In vitro incubations with alfalfa hay demonstrated that increasing levels of glycerol did not affect NDF digestibility of the hay. Additionally, increasing amounts of glycerol decreased the acetate to propionate ratio in the rumen. These results suggest that inhibiting bacterial fat degradation may promote ruminal passage of total lipid, thereby providing greater proportions of beneficial unsaturated fat for incorporation into beef products.
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Affiliation(s)
- N A Krueger
- United States Department of Agriculture, Agriculture Research Service, Southern Plains Agriculture Research Center, Food and Feed Safety research Unit, 2881 F&B Road, College Station, TX 77845, USA
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Callaway TR, Dowd SE, Edrington TS, Anderson RC, Krueger N, Bauer N, Kononoff PJ, Nisbet DJ. Evaluation of bacterial diversity in the rumen and feces of cattle fed different levels of dried distillers grains plus solubles using bacterial tag-encoded FLX amplicon pyrosequencing. J Anim Sci 2010; 88:3977-83. [PMID: 20729286 DOI: 10.2527/jas.2010-2900] [Citation(s) in RCA: 207] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Dietary components and changes cause shifts in the gastrointestinal microbial ecology that can play a role in animal health and productivity. However, most information about the microbial populations in the gut of livestock species has not been quantitative. In the present study, we utilized a new molecular method, bacterial tag-encoded FLX amplicon pyrosequencing (bTEFAP) that can perform diversity analyses of gastrointestinal bacterial populations. In the present study, cattle (n = 6) were fed a basal feedlot diet and were subsequently randomly assigned to 1 of 3 diets (n = 2 cows per diet). In each diet, 0, 25, or 50% of the concentrate portion of the ration was replaced with dried distillers grain (DDGS). Ruminal and fecal bacterial populations were different when animals were fed DDGS compared with controls; ruminal and fecal Firmicute:Bacteroidetes ratios were smaller (P = 0.07) in the 25 and 50% DDG diets compared with controls. Ruminal pH was decreased (P < 0.05) in ruminal fluid from cattle fed diets containing 50% compared with 0% DDGS. Using bTEFAP, the normal microbiota of cattle were examined using modern molecular methods to understand how diets affect gastrointestinal ecology and the gastrointestinal contribution of the microbiome to animal health and production.
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Affiliation(s)
- T R Callaway
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, Agricultural Research Service, USDA, College Station, TX 77845, USA.
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Anderson RC, Flythe MD, Krueger NA, Callaway TR, Edrington TS, Harvey RB, Nisbet DJ. Decreased competiveness of the foodborne pathogen Campylobacter jejuni during Co-culture with the hyper-ammonia producing anaerobe Clostridium aminophilum. Folia Microbiol (Praha) 2010; 55:309-11. [PMID: 20680559 DOI: 10.1007/s12223-010-0046-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 04/14/2010] [Indexed: 11/25/2022]
Abstract
Campylobacter spp. are a leading bacterial cause of human foodborne illness. When cocultured in anaerobic Bolton broth with the hyper-ammonia producing bacterium, Clostridium aminophilum, ammonia accumulation was greater and final growth of Campylobacter jejuni was reduced (CFU>or=1.4 log10/mL) compared to that obtained by pure culture controls. Co-culture with the less active ammonia-producing saccharolytic Prevotella albensis had no effect on final C. jejuni concentrations. When co-cultured similarly except with the addition of 10 micromol/L monensin, monensin-susceptible Cl. aminophilum was reduced by 2 to 4 log10 CFU/mL and concentrations of C. jejuni, which is insensitive to monensin, did not differ from its pure culture control. These results suggest that in the absence of added monensin, the hyper ammonia-producing Cl. aminophilum may be able to outcompete asaccharolytic C. jejuni for amino acid substrates and that this competitive ability was eliminated by addition on monensin.
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Affiliation(s)
- R C Anderson
- Food & Feed Safety Research Unit, United States Department of Agriculture, Agricultural Research Service, College Station, Texas 77845, USA.
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Bozic AK, Anderson RC, Carstens GE, Ricke SC, Callaway TR, Yokoyama MT, Wang JK, Nisbet DJ. Effects of the methane-inhibitors nitrate, nitroethane, lauric acid, Lauricidin and the Hawaiian marine algae Chaetoceros on ruminal fermentation in vitro. Bioresour Technol 2009; 100:4017-4025. [PMID: 19362827 DOI: 10.1016/j.biortech.2008.12.061] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2008] [Revised: 12/01/2008] [Accepted: 12/01/2008] [Indexed: 05/27/2023]
Abstract
The effects of several methane-inhibitors on rumen fermentation were compared during three 24h consecutive batch cultures of ruminal microbes in the presence of nonlimiting amounts of hydrogen. After the initial incubation series, methane production was reduced greater than 92% from that of non-treated controls (25.8+/-8.1 micromol ml(-1) incubation fluid) in cultures treated with nitroethane, sodium laurate, Lauricidin or a finely-ground product of the marine algae, Chaetoceros (added at 1, 5, 5 and 10 mg ml(-1), respectively) but not in cultures treated with sodium nitrate (1 mg m1(-1)). Methane production during two successive incubations was reduced greater than 98% from controls (22.5+/-3.2 and 23.5+/-7.9 micromol ml(-1), respectively) by all treatments. Reductions in amounts of volatile fatty acids and ammonia produced and amounts of hexose fermented, when observed, were most severe in sodium laurate-treated cultures. These results demonstrate that all tested compounds inhibited ruminal methane production in our in vitro system but their effects on fermentation differed.
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Affiliation(s)
- A K Bozic
- Department of Animal Science, Faculty of Agriculture, University of Novi Sad, Novi Sad, Republic of Serbia
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Kim WK, Weeks LJ, Anderson RC, Nisbet DJ, Dunkley K, Ricke SC. Effects of nitrocompounds on uric acid-utilizing microorganisms, nitrogen retention, and microbial community in laying hen manure. J Environ Sci Health B 2009; 44:403-406. [PMID: 19365758 DOI: 10.1080/03601230902801133] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A study was conducted to evaluate effects of nitrocompounds on growth of uric acid-utilizing microorganisms, nitrogen retention, and microbial community in laying hen manure. There were three treatments: control, 100 mM nitropropanol (NPL), and 100 mM nitropropionic acid (NPC). The mixed laying hen manure was divided into 3 groups and incubated at 23 degrees C for 7 days. On Days 0, 3, and 7, samples were collected to measure the quantity of uric acid-utilizing microorganisms, total nitrogen retention, and microbial community changes. Both nitrocompounds significantly reduced growth of the uric acid-utilizing microorganisms on Day 3 (P < 0.05). Inhibitory effects of both nitrocompounds remained until Day 7 when the experiment was terminated. NPL treatment retained significantly more manure nitrogen compared to the control on both Days 3 and 7. Manure nitrogen levels of NPC treatment were also significantly higher than the control on Day 7. We further investigated the effects of NPL and NPC on microbial community changes during a 7-day incubation. NPC treatment and control on Day 7 exhibited 94% community similarity. NPC on Day 3 and NPL on Day 7 also showed high community similarity (approximately 94%). Control on Day 0 and Day 7 yielded less than 80% community similarity. Control and NPL treatment groups on Day 3 gave the lowest community similarity (approximately 64%) compared to the other groups. This result indicated that incubation time and treatment moderately influenced microbial community changes. In summary, these results indicate that both nitrocompounds increased manure nitrogen retention by inhibiting the growth of uric acid-utilizing microorganisms, and that NPL and NPC could be used as manure treatments in order to reduce ammonia volatilization and nitrogen retention in poultry manure. Moreover, nitrocompounds may have potential as feed additives to reduce ammonia volatilization.
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Affiliation(s)
- W K Kim
- Department of Poultry Science, Texas A & M University, College Station, Texas, USA
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Abstract
White muscle samples of Antarctic fish (Notothenia rossii, N. neglecta, N. gibberifrons and Chaenocephalus aceratus) were subjected to electrophoretic tests. Isoelectric focusing of general muscle proteins provides a quick method of identifying species. Six muscle enzymes were resolved by horizontal starch gel electrophoresis. These are presumed to be the products of ten independent gene loci. Coefficients of genetic distance were calculated and substantially agree with the conventional taxonomy. Levels of genetic variability are within the normal range for marine teleosts. Two polymorphic enzymes. GPI and PGM, might prove useful as 'genetic tags' for stock identification.
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Xiang Z, Thomas GW, Thornburg KM, Cabrol N, Grin E, Anderson RC. Slope Perception from Monoscopic Field Images: Applications to Mobile Robot Navigation. J INTELL ROBOT SYST 2009. [DOI: 10.1007/s10846-008-9281-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Callaway TR, Dowd SE, Wolcott RD, Sun Y, McReynolds JL, Edrington TS, Byrd JA, Anderson RC, Krueger N, Nisbet DJ. Evaluation of the bacterial diversity in cecal contents of laying hens fed various molting diets by using bacterial tag-encoded FLX amplicon pyrosequencing. Poult Sci 2009; 88:298-302. [PMID: 19151343 DOI: 10.3382/ps.2008-00222] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Laying hens are typically induced to molt to begin a new egg-laying cycle by withdrawing feed for up to 12 to 14 d. Fasted hens are more susceptible to colonization and tissue invasion by Salmonella enterica serovar Enteritidis. Much of this increased incidence in fasted hens is thought to be due to changes in the native intestinal microflora. An alternative to feed withdrawal involves feeding alfalfa meal crumble to hens, which is indigestible by poultry but provides fermentable substrate to the intestinal microbial population and reduces Salmonella colonization of hens compared with feed withdrawal. The present study was designed to quantify differences in the cecal microbial population of hens (n=12) fed a typical layer ration, undergoing feed withdrawal, or being fed alfalfa crumble by using a novel tag bacterial diversity amplification method. Bacteroides, Prevotella, and Clostridium were the most common genera isolated from all treatment groups. Only the ceca of hens undergoing feed withdrawal (n=4) contained Salmonella. The number of genera present was greatest in the alfalfa crumble-fed group and least in the feed withdrawal group (78 vs. 54 genera, respectively). Overall, the microbial diversity was least and Lactobacillius populations were not found in the hens undergoing feed withdrawal, which could explain much of these hens' sensitivity to colonization by Salmonella.
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Affiliation(s)
- T R Callaway
- Food and Feed Safety Research Unit, Southern Plains Agricultural Research Center, Agricultural Research Service, USDA, College Station, TX 77845, USA.
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Edrington TS, Carter BH, Friend TH, Hagevoort GR, Poole TL, Callaway TR, Anderson RC, Nisbet DJ. Influence of sprinklers, used to alleviate heat stress, on faecal shedding of E. coli O157:H7 and Salmonella and antimicrobial susceptibility of Salmonella and Enterococcus in lactating dairy cattle. Lett Appl Microbiol 2009; 48:738-43. [PMID: 19413804 DOI: 10.1111/j.1472-765x.2009.02603.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To determine the effect of sprinklers on faecal shedding of Escherichia coli (E. coli) O157:H7 and Salmonella in lactating dairy cattle. METHODS AND RESULTS Sprinklers were applied to lactating dairy cattle on two farms at either the feedbunk or in the holding pen prior to milking. Faecal samples were collected approx. 1 and 4 weeks following initiation of sprinkler treatments for culture of E. coli O157:H7, Salmonella and Enterococcus. No treatment differences were observed for E. coli O157:H7. Salmonella was higher (P = 0.11) in the control treatment on day-7 whereas on day-28, the bunk sprinklers increased the number of Salmonella positive cows. Salmonella prevalence decreased (P = 0.0001) on day-5 and when examined across days in cows exposed to sprinklers prior to milking. Antimicrobial susceptibility screening found very few isolates that were multi-drug resistant. All Enterococcus isolates were susceptible to vancomycin. CONCLUSIONS This study demonstrated a significant decrease in faecal prevalence of Salmonella in lactating cattle following exposure to sprinklers administered prior to milking. SIGNIFICANCE AND IMPACT OF THE STUDY Identification of current dairy management techniques that are also effective in reducing on-farm prevalence of pathogenic bacteria could have significant food safety and environmental implications.
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Affiliation(s)
- T S Edrington
- US Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, TX, USA.
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Edrington TS, Farrow RL, Sperandio V, Hughes DT, Lawrence TE, Callaway TR, Anderson RC, Nisbet DJ. Acyl-homoserine-lactone autoinducer in the gastrointestinal [corrected] tract of feedlot cattle and correlation to season, E. coli O157:H7 prevalence, and diet. Curr Microbiol 2008; 58:227-32. [PMID: 18982388 DOI: 10.1007/s00284-008-9312-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Revised: 10/09/2008] [Accepted: 10/10/2008] [Indexed: 01/27/2023]
Abstract
Acyl-homoserine-lactone autoinducer (AHL) produced by nonenterohemorrhagic Escherichia coli species in cattle appears to be required for enterohemorrhagic E. coli (EHEC) colonization of the gastrointestinal tract (GIT). The current research aimed to examine the effect of season, diet, EHEC shedding, and location within the GIT on AHL prevalence in the ruminant. Luminal content samples were collected from the rumen and rectum of feedlot cattle at slaughter in the spring, summer, fall, and winter for culture of E. coli O157:H7 and AHL determination. During the spring collection, samples were additionally collected from the cecum and small intestine, but these samples all were AHL negative and therefore not examined again. To assess the influence of diet on AHL prevalence, 14 lambs were fed either 100% forage or 80% concentrate diets and experimentally inoculated with EHEC. At 8 days after infection, all the lambs were killed, and necropsies were taken, with luminal contents collected from the GIT. The collections from the feedlot cattle had AHL in 100% of the rumen content samples from the spring, summer, and fall, but not in any of the winter samples. No other GIT samples from feedlot cattle were AHL positive, and all the samples from the sheep study were AHL negative. The cattle seemed to show a weak correlation between ruminal AHL and EHEC prevalence. This research found AHL only in the rumen and not in the lower GIT of feedlot cattle. However, it is unclear whether this is because the pH of the lower gut destroys the AHL or because a lack of certain bacteria in the lower gut producing AHL.
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Affiliation(s)
- T S Edrington
- Food and Feed Safety Research Unit, Agricultural Research Service, United States Department of Agriculture, College Station, TX 77845, USA.
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Horrocks SM, Anderson RC, Nisbet DJ, Ricke SC. Incidence and ecology of Campylobacter jejuni and coli in animals. Anaerobe 2008; 15:18-25. [PMID: 18849005 DOI: 10.1016/j.anaerobe.2008.09.001] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Accepted: 09/11/2008] [Indexed: 10/21/2022]
Abstract
Since its initial emergence in the 1970s, Campylobacter has become one of the most common causative agents of bacterial foodborne illness. Campylobacter species readily colonize the gastrointestinal tracts of domestic, feral and wild animals and while they rarely cause clinical disease in food animals, they can produce severe acute gastroenteritis in humans. Prevalence of Campylobacter in food animals can exceed 80% thus challenging processors to employ post-harvest pathogen reduction strategies. Reduction of pathogens before arrival to the abattoir is also of interest because the implementation of pre-harvest interventions may compliment existing post-harvest control techniques to further diminish possible retail sources of infection. Such multiple hurdle approaches that simultaneously utilize pre- and post-harvest control techniques are expected to be the most effective approach for decreasing human illness associated with foodborne pathogens.
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Affiliation(s)
- S M Horrocks
- United States Department of Agriculture, Southern Plains Agricultural Research Center, College Station, TX 77845, USA
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Abstract
We present data in examination of the utility of electrical impedance spectroscopy measurements for in situ surveys to determine the water content, distribution, and phase in unconsolidated planetary regolith. We conducted calibration experiments under conditions relevant to Mars: the concentration of electrolytes in solution was varied up to 1 M to simulate the effects of unsaturated dissolved minerals and brines. We also varied the water content of heterogeneous water/sand mixtures, made with these electrolytic solutions from 0.01 wt% to 10 wt%. Tests were performed at temperatures from +25 degrees C to -65 degrees C. Conductivity and dielectric permittivity calculated from the impedance measurements indicate an expected dependence on electrolyte concentration and relative independence from electrolyte type for both liquid water and water ice. Conductivity and calculated dielectric relaxation times for these aqueous solutions agree with existing data in the literature. The relative permittivity for heterogeneous water/sand mixtures is dominated by polarization effects for the electrode configuration used. However, the characteristic orientational relaxation of ice is still visible. The conductivity retains the strong dependence on electrolyte concentration, and the permittivity is still not affected by electrolyte type. A "universal" curve between conductivity and water content establishes detectability limits of <0.01 wt% and approximately 0.3 wt% for water/sand mixtures containing liquid water and ice, respectively.
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Cabrol NA, Herkenhoff KE, Greeley R, Grin EA, Schröder C, d'Uston C, Weitz C, Yingst RA, Cohen BA, Moore J, Knudson A, Franklin B, Anderson RC, Li R. Soil sedimentology at Gusev Crater from Columbia Memorial Station to Winter Haven. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007je002953] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Min BR, Pinchak WE, Anderson RC, Hume ME. In vitro bacterial growth and in vivo ruminal microbiota populations associated with bloat in steers grazing wheat forage. J Anim Sci 2008; 84:2873-82. [PMID: 16971591 DOI: 10.2527/jas.2005-399] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The role of ruminal bacteria in the frothy bloat complex common to cattle grazing winter wheat has not been previously determined. Two experiments, one in vitro and another in vivo, were designed to elucidate the effects of fresh wheat forage on bacterial growth, biofilm complexes, rumen fermentation end products, rumen bacterial diversity, and bloat potential. In Exp. 1, 6 strains of ruminal bacteria (Streptococcus bovis strain 26, Prevotella ruminicola strain 23, Eubacterium ruminantium B1C23, Ruminococcus albus SY3, Fibrobacter succinogenes ssp. S85, and Ruminococcus flavefaciens C94) were used in vitro to determine the effect of soluble plant protein from winter wheat forage on specific bacterial growth rate, biofilm complexes, VFA, and ruminal H2 and CH4 in mono or coculture with Methanobrevibacter smithii. The specific growth rate in plant protein medium containing soluble plant protein (3.27% nitrogen) was measured during a 24-h incubation at 39 degrees C in Hungate tubes under a CO2 gas phase. A monoculture of M. smithii was grown similarly, except under H2:CO2 (1:1), in a basal methanogen growth medium supplemented likewise with soluble plant protein. In Exp. 2, 6 ruminally cannulated steers grazing wheat forage were used to evaluate the influence of bloat on the production of biofilm complexes, ruminal microbial biodiversity patterns, and ruminal fluid protein fractions. In Exp. 1, cultures of R. albus (P < 0.01) and R. flavefaciens (P < 0.05) produced the most H2 among strains and resulted in greater (P < 0.01) CH4 production when cocultured with M. smithii than other coculture combinations. Cultures of S. bovis and E. ruminantium + M. smithii produced the most biofilm mass among strains. In Exp. 2, when diets changed from bermudagrass hay to wheat forage, biofilm production increased (P < 0.01). Biofilm production, concentrations of whole ruminal content (P < 0.01), and cheesecloth filtrate protein fractions (P < 0.05) in the ruminal fluid were greater on d 50 for bloated than for nonbloated steers when grazing wheat forage. The molecular analysis of the 16S rDNA showed that 2 different ruminal microbiota populations developed between bloated and nonbloated animals grazing wheat forage. Bloat in cattle grazing wheat pastures may be caused by increased production of biofilm, resulting from a diet-influenced switch in the rumen bacterial population.
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Affiliation(s)
- B R Min
- Texas Agricultural Experiment Station, P.O. Box 1658, Vernon, Texas 76385, USA
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Saengkerdsub S, Herrera P, Woodward CL, Anderson RC, Nisbet DJ, Ricke SC. Detection of methane and quantification of methanogenic archaea in faeces from young broiler chickens using real-time PCR. Lett Appl Microbiol 2007; 45:629-34. [PMID: 17922818 DOI: 10.1111/j.1472-765x.2007.02243.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To detect the presence of methanogens in the faeces of broiler chicks during the first 2 weeks of age. METHODS AND RESULTS Chicken faecal samples from 120 broiler chicks were incubated for methane gas formation and methanogenic archaea were analysed using real-time PCR. The copy number of the order Methanobacteriales 16S rDNA gene in chicken faeces when the broilers were 3-12 days of age, litter and house flies collected in the bird house ranged from 4.19 to 5.51 log(10) g(-1) wet weight. The number of positive methane culture tubes increased from 25% to 100% as the birds aged. CONCLUSIONS Methanogens were successfully detected in faecal samples from 3- to 12-day-old broilers, as well as litter and house flies using real-time PCR. The copy number of methanogenic 16S rDNA gene in these samples was also similar to the number observed in litter and house flies. SIGNIFICANCE AND IMPACT OF THE STUDY The same methanogens consistently appeared in chicken faeces a few days after birth. Detection of the methanogenic bacteria in litter and house flies implicated them as potential environmental sources for methanogen colonization in broiler chicks.
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Affiliation(s)
- S Saengkerdsub
- Department of Poultry Science, Texas A & M University, College Station, TX, USA
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Callaway TR, Edrington TS, Anderson RC, Byrd JA, Nisbet DJ. Gastrointestinal microbial ecology and the safety of our food supply as related to Salmonella. J Anim Sci 2007; 86:E163-72. [PMID: 17878279 DOI: 10.2527/jas.2007-0457] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Salmonella causes an estimated 1.3 million human foodborne illnesses and more than 500 deaths each year in the United States, representing an annual estimated cost to the economy of approximately $2.4 billion. Salmonella enterica comprises more than 2,500 serotypes. With this genetic and environmental diversity, serotypes are adapted to live in a variety of hosts, which may or may not manifest with clinical illness. Thus, Salmonella presents a multifaceted threat to food production and safety. Salmonella have been isolated from all food animals and can cause morbidity and mortality in swine, cattle, sheep, and poultry. The link between human salmonellosis and host animals is most clear in poultry. During the early part of the 20th century, a successful campaign was waged to eliminate fowl typhoid caused by Salmonella Gallinarum/Pullorum. Microbial ecology is much like macroecology; environmental niches are filled by adapted and specialized species. Elimination of S. Gallinarum cleared a niche in the on-farm and intestinal microbial ecology that was quickly exploited by Salmonella Enteritidis and other serotypes that live in other hosts, such as rodents. In the years since, human salmonellosis cases linked to poultry have increased to the point that uncooked chicken and eggs are regarded as toxic in the zeitgeist. Salmonellosis caused by poultry products have increased significantly in the past 5 yr, leading to a USDA Food Safety and Inspection Service "Salmonella Attack Plan" that aims to reduce the incidence of Salmonella in chickens below the current 19%. The prevalence of Salmonella in swine and cattle is lower, but still poses a threat to food safety and production efficiency. Thus, approaches to reducing Salmonella in animals must take into consideration that the microbial ecology of the animal is a critical factor that should be accounted for when designing intervention strategies. Use of competitive exclusion, sodium chlorate, vaccination, and bacteriophage are all strategies that can reduce Salmonella in the live animal, but it is vital to understand how they function so that we do not invoke the law of unintended consequences.
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Affiliation(s)
- T R Callaway
- Agricultural Research Service, Food and Feed Safety Research Unit, College Station, TX 77845, USA.
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Abstract
Sodium chlorate effectively reduces or eliminates gram-negative pathogenic bacteria in the gastrointestinal tracts of live cattle. Limitations to the in vivo efficacy of chlorate are its rapid absorption from the gastrointestinal tract and its presumed reduction to chloride within the gastrointestinal tract. We hypothesized that chlorate would be reduced via ruminal bacteria in a ruminal in vitro system and that the reduction of chlorate would be influenced by the dietary for-age:concentrate ratio; thus, 4 ruminally cannulated steers were fed 20 or 80% concentrate diets in a crossover design. Ruminal fluid was collected in 2 periods and dispensed into in vitro tubes containing sodium [36Cl]chlorate, which was sufficient for 100 or 300 mg/L final chlorate concentrations. The tubes were incubated for 0, 1, 4, 8, 16, or 24 h; autoclaved, control ruminal fluid, fortified with sodium [36Cl]chlorate, was incubated for 24 h. Chlorate remaining in each sample was measured by liquid scintillation counting after [36Cl]chloride was precipitated with silver nitrate. A preliminary study indicated that chlorite, a possible intermediate in the reduction of chlorate, had a half-life of approximately 4.5 min in freshly collected (live) ruminal fluid; chlorite was, therefore, not specifically measured in ruminal incubations. The chlorate dose did not affect in vitro DM digestion (P > or = 0.11), whereas in vitro DM digestibility was decreased (P < or = 0.05) by 80% forage content. By 24 h, 57.5 +/- 2.6% of the chlorate remained in 100-mg/L incubations, whereas 78.2 +/- 2.6% of the chlorate remained in the 300-mg/L incubations. When the data were expressed on a concentration basis (mg/L), diet had no effect (P > or = 0.18) on chlorate reduction; however, when chlorate reduction was expressed on a percentage basis, chlorate reduction tended to be greater (P > or = 0.09) at 8 and 16 h in the incubations containing the low-concentrate diet. Chlorate remaining in autoclaved controls at 24 h was intermediate (P < 0.01) between chlorate remaining in live ruminal fluid samples incubated for 0 or 24 h. Attempts to isolate chlorate-respiring bacteria from 2 sources of ruminal fluid were not successful. These data indicate that microbial-dependent or chemical-dependent, or both, reduction of chlorate occurs in bovine ruminal fluid and that dietary concentrate had a negligible effect on chlorate reduction.
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Affiliation(s)
- C E Oliver
- Department of Animal and Range Sciences, North Dakota State University, Fargo 58105, USA
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Abstract
The recently recognized potential of sodium chlorate as a possible preharvest food safety tool for pathogen reduction in meat animals has spurred interest in the pharmacokinetics of intraruminally dosed chlorate. Six Loala cattle were assigned (one heifer and one steer per treatment) to one of three intraruminal doses of radiolabeled sodium [36Cl]chlorate (21, 42, or 63 mg/kg body weight) administered in four equal aliquots over a 24-h period. Blood and serum were collected (29 samples in 48 h). Total radioactive residues were measured and the radioactive moieties were speciated. Chlorate appeared rapidly in blood and serum after dosing. For animals administered a dose of 42 or 63 mg/kg, the half-life of absorption was estimated at 0.6-0.9 h. Serum chlorate concentrations progressively increased with aliquot administration until peaking at 6-21 parts per million at 26 h. Between aliquot administrations, serum chlorate levels typically peaked in 3.5 h or less. The half-life of chlorate elimination ranged between 6.9 and 11 h, depending on the dose. Ultimately, absorption of chlorate removes it from its desired site of action, the lower gastrointestinal tract, thereby reducing its efficacy. Further research is needed to develop a chlorate formulation that will allow passage to the lower gastrointestinal tract.
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Affiliation(s)
- C E Oliver
- Department of Animal and Range Sciences, North Dakota State University, Fargo, ND, USA
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Edrington TS, Ross TT, Callaway TR, Martinez CH, Hume ME, Genovese KJ, Poole TL, Anderson RC, Nisbet DJ. Investigation into the seasonal salmonellosis in lactating dairy cattle. Epidemiol Infect 2007; 136:381-90. [PMID: 17506921 PMCID: PMC2870821 DOI: 10.1017/s0950268807008680] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Sporadic salmonellosis has been reported in mature lactating dairy cattle in the southwestern United States and is an intriguing problem in that Salmonella can be cultured from faecal samples of these cattle throughout the year. However, it is pathogenic only during late summer/early autumn and in certain years. We sampled apparently healthy (n=10) and diarrhoeic (n=10) cattle during an outbreak on a 2000 head dairy in 2003. The following year, monthly faecal (from the same 30 head), total mixed ration, water, and pen soil samples were collected for Salmonella culture. No serogroup, serotype, genetic, or antimicrobial susceptibility differences were observed in comparison of isolates from healthy and sick cattle. During year 2 of the study, Salmonella was routinely cultured (although highly variable from month to month) from the cattle and the environment, although no outbreak of salmonellosis was observed.
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Affiliation(s)
- T S Edrington
- USDA-ARS, Food and Feed Safety Research Unit, College Station, TX 77845, USA.
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Ramlachan N, Anderson RC, Andrews K, Laban G, Nisbet DJ. Characterization of an antibiotic resistant Clostridium hathewayi strain from a continuous-flow exclusion chemostat culture derived from the cecal contents of a feral pig. Anaerobe 2007; 13:153-60. [PMID: 17468020 DOI: 10.1016/j.anaerobe.2007.03.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2007] [Accepted: 03/14/2007] [Indexed: 11/17/2022]
Abstract
The chemostat model has been an important tool in studying intestinal microflora. To date, several competitive exclusion products have been developed from such studies as prophylactic treatment against pathogenic bacteria. A continuous-flow chemostat model of a feral pig was developed using inocula from the cecal contents of a wild boar caught in East Texas. Several strains of antibiotic-sensitive bacteria were isolated including Bacteroides, Lactobacillus, Enterococcus and Clostridium sp. This study reports on the characterization of a multidrug-resistant Clostridium hathewayi strain that was isolated from this feral pig's cecal contents maintained in a continuous-flow chemostat system showing high resistance to carbapenems and macrolides (including the growth promoter tylosin). Clostridium hathewayi has been documented to be pathogenic to both humans and animals. Feral pigs may be an important source of pathogenic and antibiotic resistant bacteria and may pose potential risk to domestic species. Further work is needed to elucidate the prevalence of these reservoirs and assess the contribution these may play in the spread of disease and resistance.
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Affiliation(s)
- N Ramlachan
- United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, Food & Feed Safety Research Unit, 2881 F&B Road, College Station, TX 77845, USA
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Chin KB, Buehler MG, Seshadri S, Keymeulen D, Anderson RC, Dutz S, Narayanan SR. Investigation of water and ice by ac impedance using electrochemical properties cup. Rev Sci Instrum 2007; 78:016104. [PMID: 17503953 DOI: 10.1063/1.2424443] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Water and ice were investigated by ac impedance with the electrochemical properties cup in an effort to develop an in situ instrument for water characterization. In liquid water, the impedance modulus decreased with the increase in charge carriers. In the ice, the impedance measurements were characterized by the dielectric relaxation and its corresponding activation energy. The activation energy of 0.400 eV was determined for pure ice. With ice containing Cl(-) anions, the activation energy was 0.24 eV. H(+) and OH(-) doped ice has the lowest activation energy for dielectric relaxation. Results from previous works are similar to the results reported in this study.
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Affiliation(s)
- K B Chin
- Jet Propulsion Laboratory, Pasadena, California 91109, USA
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