Now showing items 29-37 of 37

    • Reference values for acetyl and butyrylcholinesterases in cattle under actual management conditions, hepatic and renal function by application of chlorpyrifos 

      Ferré, Daniela Marisol; Lentini, Valeria Roxana; Romano, Raquel; Ludueña, Héctor Ricardo; Jotallán, Paola Jimena; Gorla, Nora Bibiana María (Comité editorial Journal of Environmental Science and Health, 2018-01-02)
      Chlorpyrifos is an anticholinesterase organophosphate insecticide widely used in Argentina in the production of food derived from animal, fruit and horticultural origin and is reported as a residue within these products. Local reference values for acetyl and butyrylcholinesterase were determined in Aberdeen Angus bovine and cross bred cattle (n D 25), a requirement to be able to evaluate toxicity of commercial organophosphate and carbamate formulations. The activity of cholinesterase enzymes presented an overall mean of 2,183.00 § 485.6 IU L¡1 for erythrocyte acetylcholinesterase and 203.1 § ...
    • Report of Amblyomma parvitarsum infesting goats in Midwestern Argentina 

      Fantozzi, María Cecilia; Tarragona, Evelina Luisa; Dayenoff, Patricio; Cuervo, Pablo Fernando; Mera y Sierra, Roberto; Nava, Santiago (Comité editorial Veterinary Parasitology, 2018-09-24)
      Adult ticks were collected from goats on September 2012 in the locality of Trintrica (35° 17′ 19″ S - 68° 44′ 6″ W, 1430 m.a.s.l.), Mendoza, Argentina. The specimens were identified as seven females and three males of Amblyomma parvitarsum Neumann, 1901. This record represents the new occurrence of A. parvitarsum in the province of Mendoza, as well as the first report of the parasitism in goats along the geographical range of A. parvitarsum.
    • Rumen microbial community composition varies with diet and host, but a core microbiome is found across a wide geographical range. 

      Henderson, Gemma; Cox, Faith; Ganesh, Siva; Jonker, Arjan; Young, Wayne; Global Rumen Census Collaborators; Janssen, Peter (Comité editorial Scientific Reports, 2015-10-09)
      Ruminant livestock are important sources of human food and global greenhouse gas emissions. Feed degradation and methane formation by ruminants rely on metabolic interactions between rumen microbes and affect ruminant productivity. Rumen and camelid foregut microbial community composition was determined in 742 samples from 32 animal species and 35 countries, to estimate if this was influenced by diet, host species, or geography. Similar bacteria and archaea dominated in nearly all samples, while protozoal communities were more variable. The dominant bacteria are poorly characterised, but the ...
    • Ruminal bacterial community changes during adaptation of goats to fresh alfalfa forage. 

      Grilli, Diego Javier; Mrázek, Jakub; Fliegerová, Kateřina; Kopečný, Jan; Paez Lama, Sebastian; Cerón Cucchi, María Esperanza; Sosa, Miguel Angel; Arenas, Graciela Nora (Editorial Livestock Science, 2016-08-02)
      Using culture-independent molecular approaches, we studied the bacterial population changes in the rumen of goats abruptly converted from alfalfa hay to fresh alfalfa diet. Administration of fresh forage with significantly increased soluble nitrogen and soluble protein nitrogen resulted in frothy bloat. Changes of the bacterial composition of rumen were monitored using DGGE analysis of 16S rDNA gene amplicons and quantitative PCR method. As the diet changed, the bacterial population of Bacteroidetes and γ-Proteobacteria decreased, even if animals have not shown signs of frothy bloat. The most ...
    • Seasonal changes in feed intake, diet digestibility and diet composition by lactating and non-lactating goats browsing in a semi-arid rangeland of Argentina 

      Egea, Angela Vanina; Bakker, María Leontina; Allegretti, Liliana Inés; Paez, Sebastián Antonio; Grilli, Diego Javier; Guevara, Juan Carlos; Viillalba, Juan José (Comité editor Grass and Forage Science, 2018-10-01)
      We determined the seasonal nutrient and secondary compound intake, in vivo diet digestibility (DD) and diet species composition of goats in different physiological states in a desert rangeland of Argentina. During the wet and the dry seasons, 24 mature female Creole goats (six non-lactating, non-pregnant and six lactating in each season) were used in a 2 × 2 factorial design. Diet botanical composition, DD and dry-matter intake (DMI) were estimated by the combined use of visual observation, microhistological analyses of faecal samples and n-alkane technique. Browse species dominated the goats’ ...
    • A Single Nucleotide Polymorphism Translates into a Radical Amino Acid Substitution at the Ligand-Binding Site in Fasciola hepatica Carboxylesterase B 

      Miranda-Miranda, Estefan; Scarcella, Silvana; Reynaud, Enrique; Narváez-Padilla, Verónica; Neira, Gisela; Mera y Sierra, Roberto; Aguilar-Díaz, Hugo; Cossio-Bayugar, Raquel (Comite editorial GENES, 2022-10-19)
      Fasciola hepatica anthelmintic resistance may be associated with the catalytic activity of xenobiotic metabolizing enzymes. The gene expression of one of these enzymes, identified as car boxylesterase B (CestB), was previously described as inducible in adult parasites under anthelmintic treatment and exhibited a single nucleotide polymorphism at position 643 that translates into a radical amino acid substitution at position 215 from Glutamic acid to Lysine. Alphafold 3D models of both allelic sequences exhibited a significant affinity pocket rearrangement and different ligand-docking modeling ...
    • Situación de la fasciolasis en Mendoza: nuevos desafíos de una enfermedad desatendida 

      Mera y Sierra, Roberto; Cuervo, Pablo; Sidoti, Laura; Deis, Erika; Fantozzi, Cecilia; Sohaefer, Noelia; Neira, Gisela; Di Cataldo, Sophía; Spongia, Silvina; Gerbeno, Leticia (Dirección de Investigación, Ciencia y Técnica. Ministerio de Salud. Mendoza, 2013-03)
      Boletines de la Dirección de Investigación, Ciencia y Técnica del Ministerio de Salud de Mendoza. Los artículos publicados pertenecen a resultados de proyectos UMaza con subsidio de tal Dirección a través de la convocatoria "Investigadores Mendocinos".
    • Unusual presence of Ornidia robusta (Diptera: Syrphidae) causing pig myiasis in Argentina. 

      López Millán, Cyntia; Olea, María Sofía; Dantur Juri, María Julia (Comité editorial Parasitology Research, 2015-10-09)
      Myiasis is caused by dipterous larvae from the Calliphoridae, Sarcophagidae, Muscidae, Cuterebridae, and Syrphidae families. In this work, Cochliomyia hominivorax, Chrysomya megacephala, and Ornidia robusta were identified causing vulva, ear, and leg myiasis in pigs in Tucuman province, northwestern Argentina. The report of the presence of C. hominivorax and C. megacephala is very important due to their role as myiasis-causing and disease vectors. The occurrence of Ornidia robusta is remarkable, since it constitutes the first record of myiasis in general and of myiasis in pigs in particular. ...
    • Vector Borne Diseases in Mid Western Argentina, First Report of Setaria Equina [Nematoda: Onchocercidae] in A Horse [Equus caballus] 

      Mera y Sierra, Roberto; Iranzo, José; Neira, Gisela (Comité editorial Austin Journal of Vector Borne Diseases, 2017-12-05)
      ARTÍCULO PUBLICADO EN REVISTA EXTERNA. Vector borne diseases are spreading worldwide. Companion animals can be useful as sentinels for disease surveillance. Setaria spp. are filarial nematodes transmitted by Aedes spp. and Culex spp. Setaria equina has been reported in Asia, Africa and North America. This zoonotic nematode is frequently asymptomatic in horses, except during its erratic migrations. Filarial worms have a tropism for ocular and nervous tissues, having important implications in veterinary and public health. In mid west Argentina, Dirofilaria immitis has already been described ...