Problemática de las garrapatas de los vacunos en la Argentina

En la presente comunicación se refieren trabajos respecto a las enfermedades causadas en los vacunos por las garrapatas y los avances científicos realizados para solucionarloEl presente trabajo ha sido galardonado con el Premio "Dr. Francisco C. Rosenbusch" 1990Academia Nacional de Agronomía y Veterinari

Problemática de las garrapatas de los vacunos en la Argentina

En la presente comunicación se refieren trabajos respecto a las enfermedades causadas en los vacunos por las garrapatas y los avances científicos realizados para solucionarloEl presente trabajo ha sido galardonado con el Premio "Dr. Francisco C. Rosenbusch" 1990Academia Nacional de Agronomía y Veterinari

Towards Comparison of Ultrasound Dose Measurements - Current Capabilities and Open Challenges

open7sìThe aim of this work is to evaluate measurement methods for dosimetry and exposimetry quantities that were developed in the EMRP project “Dosimetry for Ultrasound Therapy -DUTy” by comparing the measurement results for three common quantities from three national laboratories. It further aims to investigate the general feasibility of possible future (key) comparisons for dosimetry and exposimetry quantities and to identify possible open challenges towards this goal. The general format is similar to a metrological comparison, with which the National Metrological Institutes, NMIs, are already familiar. The first step involved the agreement of the protocol that was to specify the set of transducers to be circulated and the measurement conditions. Two transducers were circulated and different drive voltage levels and pulsing regimes were defined and tissue mimicking materials (TMMs) characteristics were specified. Each lab was asked to prepare the TMMs for their own measurements with the inclusion of formulations and preparation instructions specified in the protocol. Uncertainties of the input data were to be declared by the participating laboratories.openDurando, G.; Guglielmone, C.; Haller, J.; Georg, O.; Shaw, A.; Martin, E.; Karaböce, B.Durando, Giovanni; Guglielmone, CLAUDIO LUIGI DOME; Haller, J.; Georg, O.; Shaw, A.; Martin, E.; Karaböce, B

Sigmodontinae rodents as hosts for larvae and nymphs of Ixodes loricatus Neumann, 1899 (Acari: Ixodidae)

Larvae and nymphs of Ixodes loricatus Neumann, 1899 ticks (confirmed by morphological characters and by comparison of 16S mitochondrial rDNA sequences) were collected from Sigmodontinae Wagner, rodents in central and northern Argentina and Uruguay. A total of 100 larvae and 38 nymphs of I. loricatus were collected on the genera Akodon Meyen (n = 36 individuals), Calomys Waterhouse (n = 2), Oligoryzomys Bang (n = 12), Oxymycterus Waterhouse (n = 9), and Scapteromys Waterhouse (n = 13). 72 larvae and 18 nymphs were collected on Akodon. Adults of I. loricatus were found in central Argentina and Uruguay on Didelphimorphia of the genera Didelphis Linnaeus and Lutreolina Thomas. Ixodes loricatus has been considered a species with strict total specificity to Didelphimorphia. Our results show that this statement may not be justified. Sigmodontinae rodents are sympatric and share habitats with the phylogenetically distant Didelphimorphia; infestation with I. loricatus seems to be its consequence. We tentatively consider I. loricatus moderately specific to Didelphimorphia.Centro de Estudios Parasitológicos y de Vectore

La distribución anatómica de Amblyomma neumanni y Amblyomma parvum (Acari: Ixodidae) sobre sus hospedadores principales

En este trabajo se estudió la distribución anatómica de las garrapatas Amblyomma neumanni y Amblyomma parvum sobre sus hospedadores principales, que corresponden a bovinos para todos los estadios de A. neumanni y adultos de A. parvum, y al roedor Galea musteloides para larvas y ninfas de A. parvum. La fijación de A. neumanni abarcó varios sitios corporales; las larvas se fijaron principalmente sobre la cabeza, orejas, tronco y cuello, las ninfas sobre el tronco, cuello, pecho, cola y abdomen, y los adultos sobre la cabeza, tronco, cola, cuello, pecho, abdomen y ubre. Por el contrario, la preferencia de los tres estadios de A. parvum se restringió mayormente a la cabeza y orejas. La variación que se da naturalmente en el número de garrapatas fijadas tanto a bovinos como a G. musteloides de acuerdo a la estación del año, no produjo cambios significativos en la preferencia por un área corporal del hospedador.Fil: Nava, Santiago. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Santa Fe. Estacion Experimental Agropecuaria Rafaela. Agencia de Extension Rural Carlos Pellegrini.; ArgentinaFil: Mangold, A. J.. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Santa Fe. Estacion Experimental Agropecuaria Rafaela. Agencia de Extension Rural Carlos Pellegrini.; ArgentinaFil: Guglielmone, Alberto Alejandro. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Santa Fe. Estacion Experimental Agropecuaria Rafaela. Agencia de Extension Rural Carlos Pellegrini.; Argentin

Divergent environmental preferences and areas of sympatry of tick species in the Amblyomma cajennense complex (Ixodidae)

Four species of Neotropical ticks, Amblyomma mixtum, Amblyomma cajennense, Amblyomma tonelliae and Amblyomma sculptum (formerly included in the catch-all name A. cajennense), have an allopatric distribution in much of their range, with areas of parapatry for at least two of them. We inferred the abiotic niches of these organisms using coefficients of a harmonic regression of the temperature and the Normalized Difference Vegetation Index (NDVI, reflecting plant stress) from remotely sensed data from MODIS satellites with 0.05° spatial resolution. Combinations of coefficients describing the phenology of these two variables pointed to divergent niche preferences, compatible with previous events of vicariance among the species. Amblyomma cajennense has been recorded in areas with small variations in temperature and NDVI. The remaining species were recorded in areas with large variations. The maximum environmental niche overlap was ∼73.6% between A. mixtum and A. cajennense and 73.5% between A. tonelliae and A. sculptum. Projecting these inferences on the geographical space revealed probable areas of sympatry or parapatry between A. mixtum and A. cajennense or between A. tonelliae and A. sculptum, the latter of which was confirmed with field collections. The A. sculptum distribution overlaps with that of A. tonelliae in northern Argentina and Paraguay; parapatry occurs at one extreme of the conditions occupied by both species. Compared with areas of allopatry, sites with both species had consistently lower temperatures, except for 10–12 weeks during the summer, and higher NDVI values throughout the year. We hypothesise that the overlap between A. tonelliae and A. sculptum resulted from secondary contact between populations, with A. sculptum adapting to sites with high water availability to balance high summer temperatures. Additional surveys of the areas of spatial overlap among these species are necessary to elucidate the forces driving their evolution and their adaptation to the environment.Fil: Estrada Peña, Agustín. Universidad de Zaragoza; EspañaFil: Tarragona, Evelina Luisa. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Vesco, Umberto. Università di Torino; ItaliaFil: De Meneghi, Daniele. Università di Torino; ItaliaFil: Mastropaolo, Mariano. Universidad Nacional del Litoral. Facultad de Ciencias Veterinarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Mangold, Atilio Jose. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Guglielmone, Alberto Alejandro. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Nava, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentin

Registro de vicuñas (Vicugna vicugna, Molina 1782) como hospedador de Amblyomma parvitarsum Neumann, 1901 (Acari: Ixodidae) en Bolivia

Adult stage Ixodidae mites were collected from wild vicuna (Vicugna vicugna Molina 1782), captured at threelocations from the Área Natural de Manejo Integrado Nacional Apolobamba, in the Department of La Paz, Bolivia.The collected ticks corresponded to the species Amblyomma parvitarsum (Neumann 1901). This paper constitutes thesecond report of A. parvitarsum in Bolivia and the first confirmed report for vicuna as definitive hosts in the Andeanregion of this country.Se recolectaron estadios adultos de ácaros Ixodidae de vicuñas silvestres (Vicugna vicugna, Molina 1782) capturadasen tres localizaciones del Área Natural de Manejo Integrado Nacional Apolobamba, en el Departamento de La Paz,Bolivia. Las garrapatas duras recolectadas correspondieron a la especie Amblyomma parvitarsum (Neumann, 1901).Este trabajo se constituye en el segundo reporte de A. parvitarsum en Bolivia y el primero que confirma a vicuñascomo hospedadores definitivos en la región Andina de este país

Allopatric speciation in ticks: genetic and reproductive divergence between geographic strains of Rhipicephalus (Boophilus) microplus

12 pages, 5 figures.-- PMID: 19243585 [PubMed].-- PMCID: PMC2656471.-- Supporting information (Microsatellite genotypes of individual tick crosses, XLS file) available at: http://www.biomedcentral.com/content/supplementary/1471-2148-9-46-s1.xls.-- et al.[Background]: The cattle tick, Rhipicephalus (Boophilus) microplus, economically impact cattle industry in tropical and subtropical regions of the world. The morphological and genetic differences among R. microplus strains have been documented in the literature, suggesting that biogeographical and ecological separation may have resulted in boophilid ticks from America/Africa and those from Australia being different species. To test the hypothesis of the presence of different boophilid species, herein we performed a series of experiments to characterize the reproductive performance of crosses between R. microplus from Australia, Africa and America and the genetic diversity of strains from Australia, Asia, Africa and America.[Results]: The results showed that the crosses between Australian and Argentinean or Mozambican strains of boophilid ticks are infertile while crosses between Argentinean and Mozambican strains are fertile. These results showed that tick strains from Africa (Mozambique) and America (Argentina) are the same species, while ticks from Australia may actually represent a separate species. The genetic analysis of mitochondrial 12S and 16S rDNA and microsatellite loci were not conclusive when taken separately, but provided evidence that Australian tick strains were genetically different from Asian, African and American strains.[Conclusion]: The results reported herein support the hypothesis that at least two different species share the name R. microplus. These species could be redefined as R. microplus (Canestrini, 1887) (for American and African strains) and probably the old R. australis Fuller, 1899 (for Australian strains), which needs to be redescribed. However, experiments with a larger number of tick strains from different geographic locations are needed to corroborate these results.This work was supported by ICTTD-3, financed by the International Cooperation Program of the European Union, coordination action project No. 510561, the Consejería de Educación y Ciencia, JCCM, Spain (project PAI06-0046-5285) (to JF), the Conselho Nacional de Desenvolvimento Científico e Tecnológico – CNPq (to MBL), the Consejo Nacional de Investigaciones Cientícas y Técnicas de Argentina (PIP 2058) and INTA Rafaela (TCP 426100) (to AJM, AAG and CT). V. Naranjo was funded by Junta de Comunidades de Castilla–La Mancha (JCCM), Spain.Peer reviewe

Exotic tick Amblyomma varanense (Acari: Ixodidae) in imported specimens from Varanus salvator (Squamata: Varanidae) in Argentina

La importación de animales vivos, especialmente reptiles, ha contribuido al transporte e introducción de garrapatas exóticas en muchas regiones del mundo. Se describe el hallazgo de 11 especímenes (un macho, dos hembras y ocho ninfas) de Amblyomma varanense colectados de dos varanos acuáticos (Varanus salvator) importados legalmente desde Jakarta, Indonesia. Amblyomma varanense es una garrapata distribuida en las regiones zoogeográficas Oriental y de Australasia, y V. salvator se encuentra entre los principales hospedadores. Es necesario prevenir la introducción de garrapatas exóticas y microrganismos asociados, poniéndose en evidencia el riesgo que conlleva la importación de vertebrados exóticos.The importation of live animals, especially reptiles, has contributed to the transport and introduction of exotic ticks in many regions of the world. We describe the finding of 11 specimens (one male, two females and eight nymphs) of Amblyomma varanense collected from two common water monitors (Varanus salvator) legally imported from Jakarta, Indonesia. Amblyomma varanense is a tick distributed in the Eastern and Australasian zoogeographic regions, and V. salvator is among the main hosts. It is necessary to prevent the introduction of exotic ticks and associated microorganisms, highlighting the risk involved in the importation of exotic vertebrates.Fil: Cicuttin, Gabriel Leonardo. Gobierno de la Ciudad Autónoma de Buenos Aires. Ministerio de Salud. Instituto de Zoonosis Luis Pasteur; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Wiemeyer, Guillermo. No especifíca;Fil: Pérez, M. A.. No especifíca;Fil: Guglielmone, Alberto Alejandro. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Nava, Santiago. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Santa Fe. Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentin

Entorno complementario al aprendizaje del sistema osteológico del equino

En los últimos años, los entornos virtuales educativos experimentaron un gran desarrollo. Se presenta una aplicación educativa interactiva que brinda información sobre la osteología del equino, uno de los temas que se dicta en la cátedra "Anatomía Comparada I" correspondiente al primer año de la carrera de Veterinaria (UNNE).Red de Universidades con Carreras en Informática (RedUNCI