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Mostrando ítems 61-80 de 139
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High prevalence of “Candidatus Rickettsia amblyommii” in Amblyomma ticks from a Spotted Fever Endemic Region in North Argentina
Mastropaolo, Mariano; Tarragona, Evelina Luisa; Nava, Santiago; Pfister, Kurt; Thiel, Claudia; Silaghi, Cornelia (2016)Ticks from an endemic Spotted Fever region in Argentina were analysed by PCR for Spotted Fever Group Rickettsiae. DNA of “Candidatus Rickettsia amblyommii” was found in 21.3% of Amblyomma hadanii and in 44.0% of A. neumanni. ... -
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 ... -
Infection with Ehrlichia canis and Anaplasma platys (Rickettsiales: Anaplasmataceae) in two lineages of Rhipicephalus sanguineus sensu lato (Acari: Ixodidae) from Argentina
Cicuttin, Gabriel L.; Tarragona, Evelina Luisa; de Salvo, María Nazarena; Mangold, Atilio Jose; Nava, Santiago (2015-09)Natural infection with Ehrlichia canis and Anaplasma platys in ticks belonging to the tropical and temperate lineages of Rhipicephalus sanguineus sensu lato from Argentina was evaluated. Samples were tested for Ehrlichia ... -
Influence of the cattle body weight estimation for drug dosing on the pharmacokinetic and efficacy of ivermectin against Rhipicephalus (Boophilus) microplus
Miro, Maria Victoria; Sarli, Macarena; Rossner, Maria Victoria; Gomez, Viviana Daniela; Toffaletti, Jose Rodolfo; Lifschitz, Adrian Luis; Nava, Santiago (Systematic and Applied Acarology Society, 2022-08)This study aimed to evaluate how the method of body weight estimation of a herd (average vs individual) for drug dosing may affect the pharmacokinetics and therapeutic efficacy of ivermectin 3.15% against Rhipicephalus ... -
Ixodes chilensis Kohls, 1956 (Acari: Ixodida: Ixodidae): re-description of the female, description of the nymph, and phylogenetic position inferred from mitochondrial DNA sequences of the 16S rRNA gene
Gonzalez-Acuña, Daniel; Saracho Bottero, Maria Noelia; Ossa, Gonzalo; Guglielmone, Alberto; Nava, Santiago (2018-08-28)This paper provides a re-description of the female and a description of the nymph of Ixodes chilensis Kohls, 1956. Additionally, the phylogenetic position of the species of Ixodes Latreille, 1796 belonging to the subgenus ... -
Ixodes inopinatus − Occurring also outside the Mediterranean region
Chitimia-Dobler, Lidia; Rieß, Ramona; Kahl, Olaf; Wölfel, Silke; Dobler, Gerhard; Nava, Santiago; Estrada-Peña, Agustín (2018-02)We report the presence of Ixodes inopinatus and its sympatric occurrence with Ixodes ricinus in southeastern Germany, western Austria, and Romania. The identification of I. inopinatus was based on morphological and molecular ... -
Ixodes schulzei Aragão & Fonseca, 1951 in Argentina
Lamattina, Daniela; Venzal, José Manuel; Guglielmone, Alberto Alejandro; Nava, Santiago (2016-06)Two females of Ixodes schulzei Aragão & Fonseca, 1951 were collected from Nectomys squamipes (Rodentia: Cricetidae: Sigmodontinae) at Iguazú National Park, Misiones Province, Argentina. This is the first record of this ... -
Ixodes silvanus n. sp. (Acari: Ixodidae), a new member of the subgenus Trichotoixodes Reznik, 1961 from northwestern Argentina
Saracho Bottero, Maria Noelia; Beati, Lorenza; Venzal, José Manuel; Guardia Claps, Leonor; Thompson, Carolina Soledad; Mangold, Atilio Jose; Guglielmone, Alberto; Nava, Santiago (Elsevier, 2020-09)Females, nymphs, and larvae of Ixodes silvanus n. sp. collected from birds and from the vegetation in northwestern Argentina (Yungas Phytogeographic Province) are described herein. The new species belongs to the subgenus ... -
Liolaemus lizards (Squamata: Liolaemidae) as hosts for the nymph of Amblyomma parvitarsum (Acari: Ixodidae), with notes on Rickettsia infection
Muñoz-Leal, Sebastian; Tarragona, Evelina Luisa; Martins, Thiago F.; Burgos-Gallardo, Freddy; Nava, Santiago; Labruna, Marcelo B.; González-Acuña, Daniel; Martín, Claudia Melisa (2016)Adults of Amblyomma parvitarsum are common ectoparasites of South American camelids of the genera Lama and Vicugna, occuring in highlands of Argentina, Bolivia, Chile, Peru and also in Argentinean Patagonia. Whereas larval ... -
Low Genetic Diversity of the Only Clade of the Tick Rhipicephalus microplus in the Neotropics
Díaz-Sánchez, Sandra; Hernández-Triana, Luis M.; Labruna, Marcelo B.; Merino, Octavio; Mosqueda, Juan; Nava, Santiago; Szabó, Matías P.J.; Tarragona, Evelina Luisa; Venzal, José Manuel; de La Fuente, José; Estrada-Peña, Agustín (MDPI, 2023-11)This study addresses the variability of the mitochondrial cytochrome oxidase subunit I (COI) and 16S rDNA (16S), and nuclear internal transcriber spacer ITS2 (ITS2) genes in a set of field-collected samples of the cattle ... -
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 ... -
Migration of Rhipicephalus microplus ticks among cattle
Mazzucco Panizza, Matilde Nahimé; Rossner, Maria Victoria; Signorini Porchiett, Marcelo Lisandro; Nava, Santiago (Royal Entomology Society, 2022-11)The aim of this work was to quantitatively analyse the magnitude of the migration of Rhipicephalus microplus ticks among cattle under field conditions, in groups of bovines with different stocking rates. The role of this ... -
Molecular characterization of novel Ehrlichia genotypes in Ixodes auritulus from Uruguay
Félix, María L.; Muñoz-Leal, Sebastian; Carvalho, Luis A.; Queirolo, Diego; Remesar Alonso, Susana; Nava, Santiago; Armúa-Fernández, María T.; Venzal, José Manuel (Elsevier, 2021-04)Ehrlichia are small intracellular Gram-negative bacteria transmitted by ticks. These microorganisms cause ehrlichiosis, a complex of life-threatening emerging zoonoses and diseases of global veterinary relevance. The aim ... -
Molecular detection and phylogenetic analysis of Anaplasma platys-like and Candidatus Anaplasma boleense strains from Argentina
Sebastian, Patrick; Mazzucco Panizza, Matilde Nahimé; García Ríos, Ignacio José María; Tarragona, Evelina Luisa; Trova, Gabriela Beatriz; Sánchez Negrette, Olga; Primo, María Evangelina; Nava, Santiago (Elsevier, 2023-05)The present study aimed at the molecular detection of Anaplasma spp. in different samples obtained from cattle, goats and free-living Rhipicephalus microplus ticks from Argentina. DNA of members of the Anaplasmataceae ... -
Molecular detection of Candidatus Ehrlichia pampeana (Rickettsiales: Anaplasmataceae) in Haemaphysalis juxtakochi (Acari: Ixodidae) from central Argentina
Flores, Fernando Sebastian; Sebastian, Patrick Stephan; Nava, Santiago (Springer, 2024-02)The aim of this study was to report the first detection of Candidatus Ehrlichia pampeana in Haemaphysalis juxtakochi from Argentina. Free-living ticks were collected from vegetation by drag-flag method on five sample sites ... -
Molecular Detection of Candidatus Rickettsia andeanae and Ehrlichia sp. in Amblyomma pseudoconcolor Aragão, 1908 (Acari: Ixodidae) from the Argentinian Patagonia
Sebastian, Patrick; Winter, Marina; Abate, Sergio Damian; Tarragona, Evelina Luisa; Nava, Santiago (MDPI, 2022-11)This study presents the molecular detection of Candidatus Rickettsia andeanae and Ehrlichia sp. in Amblyomma pseudoconcolor Aragão, 1908 (Acari: Ixodidae) collected on a large hairy armadillo (Chaetophractus villosus ... -
Molecular detection of rickettsial bacteria in ticks of the genus Ixodes from the Southern Cone of America
Sebastian, Patrick Stephan; Flores, Fernando Sebastian; Saracho Bottero, Maria Noelia; Tarragona, Evelina Luisa; Venzal, José Manuel; Nava, Santiago (Elsevier, 2020-10)To obtain information about rickettsial bacteria in ticks of the genus Ixodes from Argentina and Uruguay, specimens of I. fuscipes (previously named as I. aragaoi), Ixodes pararicinus, Ixodes sp. cf. I. affinis, and Ixodes ... -
Molecular detection of the human pathogen Rickettsia parkeri strain Atlantic rainforest in Amblyomma ovale ticks in Argentina
Lamattina, Daniela; Tarragona, Evelina Luisa; Nava, Santiago (2018-05)Human rickettsioses caused by Rickettsia parkeri strain Atlantic rainforest in Brazil motivated the analysis of Amblyomma ovale ticks in Misiones province, a similar ecological region in northeastern Argentina. During ... -
Molecular evidence and additional morphological characters to distinguish Ornithodoros brodyi and Ornithodoros yumatensis (Ixodida: Argasidae) in their different developmental stages
Guzman Cornejo, Carmen M.; Garcia-Prieto, Luis; Rebollo-Hernandez, Andrea; Nava, Santiago; Sanches-Montes, Sokani; Venzal, José Manuel (2017)Ornithodoros brodyi and Ornithodoros yumatensis are two species distributed in the Americas and associated with bats and caves. Both species have similar morphology, and the diagnostic traits of adults have not been detailed ... -
Morphological descriptions of the nymph and adults of Ornithodoros clarki, the larva and nymph of Ornithodoros rondoniensis, with notes on their phylogenetic relationships
Labruna, Marcelo B.; Nava, Santiago; Rebollo Hernández, Andrea; Guzman Cornejo, Carmen M.; Hernández, Ligia V.; Domínguez, Lillian; Muñoz-Leal, Sebastian; Venzal, José Manuel (Springer, 2021-03-26)Based on tick specimens collected recently in Mexico, Nicaragua, Panama and Brazil, we provide morphological descriptions of the nymph and adults of Ornithodoros clarki Jones & Clifford, 1972 from the first three countries, ...