Evidência de infecção intra-uterina por Mycobacterium avium subsp. paratuberculosis usando Multiple-Locus Variable-number tandem-repeat Analysis:: primeiro relato na Argentina

Uma novilha prenha em estado clínico avançado de paratuberculose foi observada em um rebanho bovino na Argentina. O animal foi eutanasiado e foram colhidas amostras dos seus órgãos e dos órgãos feto as quais foram cultivadas para bacteriologia em meio específico. Os tecidos foram examinados por histopatologia (coloração de hematoxilina-eosina e Ziehl-Neelsen). Na histopatologia das amostras colhidas da novilha foram observadas lesões compatíveis com paratuberculose e a coloração de Ziehl-Neelsen revelou a presença de bacilos álcool-ácido resistentes, nos tecidos fetais não foram observadas lesões, porém a coloração de Ziehl-Neelsen revelou a presença de bacilos álcool-ácido resistentes. Após o crescimento em meio específico, as colônias foram positivas para o teste IS900-PCR nos tecidos de ambos, vaca e feto, confirmando a presença de Mycobacterium avium subsp. paratuberculosis. Por fim, os isolados foram tipados por Multiple-Locus Variable-number tandem-repeat Analysis, confirmando a relação epidemiológicaentre eles. Este estudo relata a primeira detecção de Mycobacterium avium subsp. paratuberculosis na Argentina em que houve o compartilhamento de um tipo idêntico de MLVA em uma vaca prenhe e no seu feto. Os resultados deste estudo são consistentes com relatos anteriores e destacam a transmissão intra-uterina de Mycobacterium avium subsp. paratuberculosis como importante fonte de infecção nos rebanhos de bovinos.A pregnant heifer with an advanced clinical stage of paratuberculosis was reported in a herd in Argentina. Thus, the animal was euthanized and samples of organs of the cow and its fetus was taken and cultured for bacteriology in specific medium. Tissues were analyzed by histopathology (hematoxylin-eosin and Ziehl-Neelsen staining). Histopathological analysis of the cow’s samples revealed the presence of lesions consistent with paratuberculosis, and Ziehl-Neelsen staining revealed the presence of acid-fast bacilli, whereas the fetal tissues showed absence of lesions but the presence of acid-fast bacilli by Ziehl-Neelsen staining. After growing in specific medium, colonies in tissues from both cow and fetus were positive for IS900-PCR, confirming the presence of Mycobacterium avium subsp. paratuberculosis (MAP). Finally, the isolates were typed by Multiple-Locus Variable-number tandem-repeat Analysis (MLVA), which confirmedthe epidemiological link between them. This study is the first in Argentina to report the detection of MAP that shares an identical MLVA type in a pregnant cow and its fetus. The results of this study are consistent with previous reports and highlight the intra-uterine transmission of MAP as an important source of infection within herds

Caudal vena cava thrombosis in a dairy cow (Bos taurus) in Argentina

Caudal vena cava thrombosis (CVCT) is an acute disease secondary to ruminal lactic acidosis and rumenitis with fatal outcome in cattle fed with a high-grain diet. The aim of this paper is to describe CVCT in an adult Holstein cow from a herd in Balcarce, Buenos Aires, Argentina. Clinical signs included dyspnea, weakness, recumbence, and hemoptysis, followed by death in 3.5 days. Important necropsy findings included multiple hepatic abscesses, a septic thrombus (4.0cm x 2.0cm) in the vena cava adjacent to the liver, and a 15cm hematoma in the right lung. Histological lesions observed in the pulmonary parenchyma included suppurative pneumonia with embolic bacterial colonies and severe interstitial fibroplasia. Dissociation and degeneration of elastic fibers were observed in the pulmonary arteries, and necrotizing vasculitis was present in the caudal vena cava. We concluded that CVCT should be included in the differential diagnosis of diseases with acute respiratory signs. The preventive measures to control the CVCT include the reduction of lactic acidosis.EEA BalcarceFil: Schild, Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Instituto Nacional de Investigación Agropecuaria (INIA). La Estanzuela; UruguayFil: Armendano, Joaquín Ignacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Universidad Nacional de Mar Del Plata. Facultad de Ciencias Agrarias; ArgentinaFil: Liboreiro, Matías. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Profesional de la Actividad Privada; ArgentinaFil: Bresky, Florencia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Morrell, Eleonora Lidia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Odriozola, Ernesto Raul. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; ArgentinaFil: Canton, German Jose. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentin

Особенности организационно-экономического механизма обеспечения устойчивого развития сельского хозяйства региона

Материалы IX Междунар. науч.-практ. конф., Гомель, 26-27 ноября 2015

2018 Atmospheric Motion Vector (AMV): intercomparison study

Atmospheric Motion Vectors (AMVs) calculated by six different institutions (Brazil Center for Weather Prediction and Climate Studies/CPTEC/INPE, European Organization for the Exploitation of Meteorological Satellites/EUMETSAT, Japan Meteorological Agency/JMA, Korea Meteorological Administration/KMA, Unites States National Oceanic and Atmospheric Administration/NOAA, and the Satellite Application Facility on Support to Nowcasting and Very short range forecasting/NWCSAF) with JMA’s Himawari-8 satellite data and other common input data are here compared. The comparison is based on two different AMV input datasets, calculated with two different image triplets for 21 July 2016, and the use of a prescribed and a specific configuration. The main results of the study are summarized as follows: (1) the differences in the AMV datasets depend very much on the ‘AMV height assignment’ used and much less on the use of a prescribed or specific configuration; (2) the use of the ‘Common Quality Indicator (CQI)’ has a quantified skill in filtering collocated AMVs for an improved statistical agreement between centers; (3) Among the six AMV operational algorithms verified by this AMV Intercomparison, JMA AMV algorithm has the best overall performance considering all validation metrics, mainly due to its new height assignment method: ‘Optimal estimation method considering the observed infrared radiances, the vertical profile of the Numerical Weather Prediction wind, and the estimated brightness temperature using a radiative transfer model’.The “Space Science and Engineering Center” (SSEC) of the “University ofWisconsin-Madison” (UW) was funded to do this research by the “European Organization for the Exploitation of Meteorological Satellites (EUMETSAT)”, through the “Satellite Application Facility on Support to Nowcasting and Very short range forecasting (NWCSAF)” “Visiting Scientist Activity (VSA)” program

Non-invasive Diagnostic of Helicobacter pylori in Stools by Nested-qPCR

The aim of this study was to develop a non-invasive diagnostic test for the detection of Helicobacter pylori in stool samples from digestive symptomatic patients, using a new protocol of nested-qPCR. A total of 143 patients were invited to participate in the study. A gastric biopsy of each patient was collected for Rapid Urease Testing (RUT) and histology by Giemsa stain. A fecal sample for nested-qPCR analysis was also obtained. DNA was extracted from the fecal samples, and conventional PCR followed by qPCR of the ureC gene of H. pylori was carried out. We evaluated the presence of H. pylori, in 103 females and 40 males, mean (± SD) age of 56.5 ± 14.18. The sensitivity of RUT to detect the infection was 67.0% (95% C.I.: 57.2 – 75.8) and specificity was 92.3% (95% C.I.: 76.5 – 99.1). Histology by Giemsa stain, commonly used as a reference for H. pylori detection, showed a sensitivity of 98.6% (95% C.I.: 92.5 – 100.0) and a specificity of 89.7% (95% C.I.: 72.7 – 97.8). In contrast, detection of H. pylori infection in stools by nested-qPCR showed a sensitivity of 100% (95% C.I.: 94.9 – 100.0) and a specificity of 83.9% (95% C.I.: 66.3 – 94.6). Our test, based in nested-qPCR is a better diagnostic alternative than conventional RUT, and is similar to histology by Giemsa stain in the detection of H. pylori, by which the test could be used for non-invasive diagnosis in clinical practice

Análisis del impacto de la miasis por Cochliomyia hominivorax sobre la producción ganadera en Argentina

El término “miasis” se define como la infestación de animales vertebrados con larvas de dípteros, las cuales durante un cierto período se alimentan de los tejidos del hospedador (Zumpt, 1965). De acuerdo a su localización, las miasis se clasifican en cavitarias y cutáneas. Entre los dípteros productores de estas últimas, aquellas especies pertenecientes a la familia Calliphoridae son las de mayor distribución mundial y se incluyen dentro de los géneros Chrysomyia, Cochliomyia, Lucilia, Calliphora y Phornia. Sin embargo, solo un número relativamente pequeño de especies pertenecientes a los tres primeros géneros son considerados como de importancia clínica o económica.EEA RafaelaFil: Signorini, Marcelo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Signorini, Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación de la Cadena Láctea; ArgentinaFil: Anziani, Oscar S. Universidad Católica de Córdoba. Facultad de Ciencias Agropecuarias; ArgentinaFil: Rossner, Maria Victoria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Colonia Benítez; ArgentinaFil: Gamietea, Ignacio José. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro. Agencia de Extensión San Pedro; ArgentinaFil: Micheloud, Juan Francisco. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Salta; Argentina.Fil: Lloberas, María Mercedes. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina.Fil: Martinez, Norberto Claudio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Reconquista. Agencia de Extensión Rural Garabato; ArgentinaFil: Olmos, Leandro Hipolito. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Salta; Argentina.Fil: Sarmiento, Nestor Fabian. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; ArgentinaFil: Abdala, Alejandro Ariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Abdala, Alejandro Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación de la Cadena Láctea; ArgentinaFil: Callaci, Carlos Ruben. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Callaci, Carlos Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación de la Cadena Láctea; ArgentinaFil: Bresky, Florencia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Colonia Benítez; ArgentinaFil: Zimmer, Patricia Andrea. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria El Colorado. Agencia de Extensión Rural Formosa; ArgentinaFil: Da Luz, Miguel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Cerro Azul; ArgentinaFil: Reinaldi, Javier Aníbal. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Quimili. Agencia de Extensión Rural Quimili; ArgentinaFil: Pereda, Ariel Julian. Instituto Nacional de Tecnología Agropecuaria (INTA). Programa Salud Animal; ArgentinaFil: Nava, Santiago. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Nava, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación de la Cadena Láctea; Argentin

Informe científico de Beca de Estudio: Bresky, Florencia (2015)

Las actividades realizadas durante el transcurso de los primeros diez meses de beca fueron en mayor medida orientadas a la parte práctica, la labor consistió en: - el ensayo experimental realizado en la Reserva Ganadera nº5 de la EEA INTA Balcarce: selección de los animales, toma de muestra de sangre seriada, infección experimental con micobacterias ambientales, prueba de tuberculina comparativa cervical, lectura de tuberculinas; - visitas a establecimientos ganaderos y lecheros de la actividad privada, ubicados en diversas localidades de la provincia de Buenos Aires y Córdoba: toma de muestras de sangre, tuberculinización comparativa cervical, lectura de tuberculinas, necropsias; - el Laboratorio de Bacteriología del grupo de Sanidad Animal del INTA EEA Balcarce: estimulación en placas de las muestras de plasmas para el análisis de gamma interferon, preparacion de diversos medios de cultivos, siembra en tubos, siembra en placas, recuento bacteriano en placas, desuerado de sangres, tincion de Ziehl Neelsen, realización de frotis; - el Laboratorio Animal de SENASA (Martínez, Bs. As.): prueba de potencia biológica de las tuberculinas PPDf, PPDph y PPDpo realizadas en cobayos; - frigorífico: toma de muestras de órganos de animales positivos a la PPD bovina