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Mostrando ítems 1-20 de 23
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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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
In vitro diagnosis of resistance of the cattle tick Rhipicephalus (Boophilus) microplus to fipronil in Argentina
Torrents, Jorgelina; Morel, Nicolas; Rossner, Maria Victoria; Martinez, Norberto Claudio; Toffaletti, Jose Rodolfo; Nava, Santiago (Springer, 2020-09)The aim of this work was to adapt and apply the in vitro larval bioassay packet test (LPT) to diagnose resistance of Rhipicephalus microplus ticks to fipronil in Argentina. Ten serial dilutions of fipronil were included ... -
Management strategies to minimize the use of synthetic chemical acaricides in the control of the cattle tick Rhipicephalus (Boophilus) microplus (Canestrini, 1888) in an area highly favourable for its development in Argentina
Nava, Santiago; Rossner, Maria Victoria; Torrents, Jorgelina; Morel, Nicolas; Martinez, Norberto Claudio; Mangold, Atilio Jose; Guglielmone, Alberto (Wiley, 2020-02)The aim of this work was to test the efficacy of winter-spring control strategies against Rhipicephalus (Boophilus) microplus (Canestrini, 1888) (Ixodida: Ixodidae) in an area highly favourable for its development in ... -
Resistance of the cattle tick Rhipicephalus (Boophilus) microplus to fluazuron in Argentina
Torrents, Jorgelina; Sarli, Macarena; Sarmiento, Nestor Fabian; Rossner, Maria Victoria; Morel, Nicolas; Guglielmone, Alberto; Nava, Santiago (Springer, 2022-05)The aim of this work is to report the presence of resistance to fluazuron in a population of Rhipicephalus microplus in Argentina. The evidence was obtained from field and in vitro trials. In the field trial, cattle infested ... -
Resistance of the cattle tick Rhipicephalus (Boophilus) microplus to ivermectin in Argentina
Torrents, Jorgelina; Sarli, Macarena; Rossner, Maria Victoria; Toffaletti, Jose Rodolfo; Morel, Nicolas; Martinez, Norberto Claudio; Webster, Anelise; Mangold, Atilio Jose; Guglielmone, Alberto; Nava, Santiago (Elsevier, 2020)Resistance to ivermectin in populations of the cattle tick Rhipicephalus microplus in Argentina was diagnosed in this work. The in vitro larval immersion test (LIT) was used to determine quantitatively the levels of ... -
Risks of cattle babesiosis (Babesia bovis) outbreaks in a semi-arid region of Argentina
Morel, Nicolas; Mastropaolo, Mariano; Torioni, Susana Marta; Signorini, Marcelo; Mangold, Atilio Jose (Elsevier, 2019-10)The epidemiology of Babesia bovis was studied in terms of enzootic stability/instability and husbandry and abiotic factors influencing B. bovis transmission rate in northeastern Santiago del Estero province, Argentina. The ... -
Spatiotemporal heterogeneity of Rhipicephalus microplus resistance to chemical acaricides at intra-farm level: A case study using ivermectin
Morel, Nicolas; Torrents, Jorgelina; Sarli, Macarena; Rossner, Maria Victoria; Lifschitz, Adrian Luis; Nava, Santiago (Royal Entomological Society, 2024-12)The aim of this work was to analyse the spatiotemporal heterogeneity of Rhipicephalus microplus (Canestrini, 1888) (Acari: Ixodidae) resistance to chemical acaricides at intra-farm level under different environmental ...