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Mostrando ítems 1-20 de 32
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A comparison of two in vitro bioassays to detect resistance of the cattle tick Rhipicephalus microplus to fipronil
Torrents, Jorgelina; Morel, Nicolas; Rossner, Maria Victoria; Martinez, Norberto Claudio; Nava, Santiago (Elsevier, 2023-01)The aim of this work is to compare the sensitivity of two in vitro bioassays to detect resistant to fipronil in Argentinean populations of the cattle tick Rhipicephalus microplus. Two different larval bioassays prepared ... -
A Trypanosoma species detected in Rhipicephalus (Boophilus) microplus ticks from Argentina
Morel, Nicolas; Thompson, Carolina Soledad; Rossner, Maria Victoria; Mangold, Atilio Jose; Nava, Santiago (Elsevier, 2020-09)Specimens of a Trypanosoma sp. were found in a haemolymph sample of Rhipicephalus microplus from Argentina. Polymerase chain reaction (PCR) was done targeting the SSU rRNA gene of Trypanosoma spp. and a fragment of 2300 ... -
Alternative applications of the strategic control against the cattle tick Rhipicephalus (Boophilus) microplus in a subtropical area
Nava, Santiago; Toffaletti, Jose Rodolfo; Rossner, Maria Victoria; Morel, Nicolas; Mangold, Atilio José (Springer, 2021-09)Although different evaluations on the efficacy of the strategic control against Rhipicephalus microplus have been performed, the effects of successive applications of these schemes on the abundance of cattle ticks have not ... -
Analysis of management factors influencing Anaplasma marginale transmission
Morel, Nicolas; Mastropaolo, Mariano; Torioni, Susana Marta; Signorini Porchiett, Marcelo Lisandro; Mangold, Atilio Jose; Primo, María Evangelina (Elsevier, 2024-10)The aim of this study was to identify factors that play a key role in the epidemiology of bovine anaplasmosis by adapting a model primarily developed for cattle babesiosis. A cross-sectional observational study was conducted ... -
Analysis of sequence variations in the GABA gated chloride gene associated with resistance to fipronil in Rhipicephalus (Boophilus) microplus ticks from Argentina
Sarli, Macarena; Torrents, Jorgelina; Morel, Nicolas; Nava, Santiago (Elsevier, 2022-11)This study aimed to evaluate the sequence variations of the GABA-Cl gene of Rhipicephalus (Boophilus) microplus ticks from Argentina with different resistance levels to fipronil. Genomic DNA was obtained from engorged ... -
Applicability of three indices to evaluate the reproductive capacity of Rhipicephalus microplus engorged female ticks in acaricide efficacy trials
Sarli, Macarena; Morel, Nicolas; Nava, Santiago (Elsevier, 2023)This study aimed to analyze the applicability of three different indices to evaluate the reproductive capacity of engorged females (RCEF). The indices, RCEF1, RCEF2 and RCEF3, were proposed as alternative to the count of ... -
Assays to evaluate the transovarial transmission of Anaplasma marginale by Rhipicephalus microplus
Mazzucco Panizza, Matilde Nahimé; Cutulle, Christian; Primo, María Evangelina; Morel, Nicolas; Sebastian, Patrick; Nava, Santiago (Elsevier, 2022-11)The aim of this study was to evaluate the vectorial competence of Rhipicephalus microplus to transmit Anaplasma marginale transovarially, by analyzing the results of three different but complementary assays. First, larvae ... -
Assessment of habitat suitability for the cattle tick Rhipicephalus (Boophilus) microplus in temperate areas
Nava, Santiago; Gamietea, Ignacio José; Morel, Nicolas; Guglielmone, Alberto; Estrada-Peña, Agustín (Elsevier, 2022-07)The aim of this research was to analyze and model the aptitude of temperate areas to support permanent populations of the cattle tick Rhipicephalus microplus, which is principally distributed in tropical and subtropical ... -
Bases epidemiológicas para el control estratégico de la garrapata común del bovino Rhipicephalus (Boophilus) microplus
Nava, Santiago; Morel, Nicolas; Rossner, Maria Victoria; Toffaletti, Jose Rodolfo; Sarmiento, Nestor Fabian; Mangold, Atilio José (Estación Experimental Agropecuaria Rafaela, INTA, 2021-07-12)La aplicación de acaricidas químicos sintéticos sobre los bovinos es, al día de hoy, la principal herramienta disponible para el control exitoso de la garrapata Rhipicephalus(Boophilus) microplus. A pesar de la disponibilidad ... -
Un caso de resistencia de Rhipicephalus microplus (Acari: Ixodidae) al fipronil detectado en pruebas de campo en el este de Santiago del Estero, Argentina
Nava, Santiago; Morel, Nicolas; Mangold, Atilio Jose; Guglielmone, Alberto (2018-03)En este trabajo se describe la resistencia de una población Rhipicephalus microplus resistente al fipronil 1% (ECTOLINE®) en condiciones de campo en el este de Santiago del Estero, Argentina. Las pruebas fueron realizadas ... -
Comparative analysis of Rhipicephalus microplus (Canestrini, 1888) infestation in pure breed (Hereford) and cross breed (Braford) cattle herds subjected to the same chemical treatments
Morel, Nicolas; Torrents, Jorgelina; Nava, Santiago (Springer Nature, 2024-05)The aim of this work was to analyze the R. microplus (Canestrini, 1888) infestation in two bovine herds with different degrees of natural resistance (i.e., Hereford and Braford) to ticks subjected to an identical chemical ... -
Descripción de dos casos de babesiosis cerebral en terneros de hasta 15 días de edad
Olmos, Leandro Hipólito; Micheloud, Juan Francisco; Morel, Nicolas; Bertoni, Emiliano Agustín; Avellaneda Cáceres, Agustín; Primo, María Evangelina; Thompson, Carolina Soledad; Torioni, Susana Marta; Aguirre, Daniel Hector (Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral, 2020-06)La babesiosis es una enfermedad causada por Babesia bovis y Babesia bigemina, integrante del complejo conocido como “Tristeza bovina” y relevante en el Noroeste argentino (NOA). La presentación clínica de esta enfermedad ... -
Determinación de la resistencia individual a la infestación por la garrapata común del bovino Rhipicephalus microplus en la raza Brangus = Assessment of individual resistance to tick infestation in Brangus cattle
Bonamy, Martin; Fernandez, Maria Elena; Rossner, Maria Victoria; Sarli, Macarena; Muchiut, Sebastian; Gomez, Viviana Daniela; Torrents, Jorgelina; Morel, Nicolas; Nava, Santiago; Giovambattista, Guillermo (Asociación Argentina de Producción Animal (AAPA), 2025-09)La infestación de bovinos por la garrapata común del bovino Rhipicephalus microplus representa uno de los principales problemas sanitarios para la ganadería en el norte argentino. Este parásito produce pérdidas físicas ... -
Development and field evaluation of a nested polymerase chain reaction-restriction fragment length polymorphism (nPCR-RFLP) analysis to identify A. marginale-infected and A. centrale-vaccinated cattle
Primo, María Evangelina; Bellezze, Julio; Morel, Nicolas; Mazzucco Panizza, Matilde Nahimé; Valentini, Beatriz Susana; Torioni, Susana Marta; Thompson, Carolina Soledad (Elsevier, 2022-07)A nested polymerase chain reaction-restriction fragment length polymorphism (nPCR-RFLP) assay based on the amplification of the Anaplasma spp. highly conserved msp5 gene and posterior digestion with HindIII endonuclease ... -
Does parity order or cow antibody level influence the humoral immunity of calves for cattle anaplasmosis?
Lagranha, Camila; Morel, Nicolas; Costa-Junior, Lívio M.; Klafke, Guilherme; Gallina, Tiago; Reck, José (Springer, 2024-02)Anaplasmosis is a widely distributed vector-borne disease of cattle caused by the bacteria Anaplasma marginale, which may lead to severe losses in beef and dairy cattle production. Anecdotal information among farmers ... -
Double antigen sandwich ELISA for detection of antibodies against Babesia bovis
Primo, María Evangelina; Valentini, Beatriz Susana; Mazzucco Panizza, Matilde Nahimé; Morel, Nicolas; Thompson, Carolina Soledad (Elsevier, 2026-02)Babesia bovis is a hemoparasite responsible for bovine babesiosis, an economically important tickborne disease widespread in tropical and subtropical regions of the world. Serological tests are used in calves to evaluate ... -
Efecto del control estratégico de la garrapata común del bovino Rhipicephalus (Boophilus) microplus sobre la ganancia de peso en vaquillas Braford en el noreste de Argentina
Rossner, Maria Victoria; Torrents, Jorgelina; Morel, Nicolas; Prieto, Paula Noelia; Lottero, F.; Mangold, Atilio Jose; Nava, Santiago (Ediciones INTA, 2022-04)El objetivo de este trabajo fue analizar el impacto del control estratégico de Rhipicephalus microplus sobre la ganancia de peso de vaquillas Braford en el noreste de Argentina. Se realizaron dos experimentos con un diseño ... -
Efficacy of winter–spring strategic control against Rhipicephalus (Boophilus) microplus infestations on cattle in an area with ecological conditions highly favourable for the tick in northeast Argentina
Nava, Santiago; Toffaletti, Jose Rodolfo; Morel, Nicolas; Guglielmone, Alberto; Mangold, Atilio Jose (Wiley, 2019-01)This work was performed to test the efficacy of winter–spring control strategies against Rhipicephalus (Boophilus) microplus (Ixodida: Ixodidae) infestations on cattle in the area ecologically most favourable for the ... -
Evaluación de un esquema de control integrado de Rhipicephalus (Boophilus) microplus en vacas preñadas y con cría en el noreste argentino
Rossner, Maria Victoria; Gomez, Viviana Daniela; Morel, Nicolas; Nava, Santiago (Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral, 2022-05)El objetivo fue evaluar un esquema de control integrado para Rhipicephalus (Boophilus) microplus en vacas preñadas y con cría combinando dos tratamientos con acaricidas químicos y el descanso de potreros en una localidad ... -
Evaluation of the impact of successive acaricide treatments on resistance evolution in Rhipicephalus microplus populations: Monodrugs versus drug combinations
Sarli, Macarena; Torrents, Jorgelina; Toffaletti, Jose Rodolfo; Morel, Nicolas; Nava, Santiago (Elsevier, 2023-11)The aim of this work was to comparatively evaluate the evolution of resistance in Rhipicephalus microplus tick populations exposed to successive treatments with monodrug-based formulations and combinations of them in the ...