Results 111 to 120 of about 416 (131)

Distribution and genetic variation of Amblyomma triste (Acari: Ixodidae) in Argentina

open access: yesTicks and Tick-borne Diseases, 2013
A study was conducted to investigate the distribution of Amblyomma triste in Argentina under the hypothesis that this tick prevails in riparian localities along the Paraná River and adjacent humid environments from 34° 30' S to 25° 20' S, approximately. Ticks were collected from mammals and vegetation in those environments from November 2008 to October
Alberto A Guglielmone   +2 more
exaly   +5 more sources

Detection of Alpha and Gamma-Proteobacteria in Amblyomma triste (Acari: Ixodidae) from Uruguay

open access: yesExperimental and Applied Acarology, 2007
Amblyomma triste is the most prevalent tick species reported in human tick bites in Uruguay and has been found to be infected with Rickettsia parkeri, but no other microorganisms have been reported from this tick. A sample of 254 adults of A. triste was collected by flagging on vegetation in suburban areas in southern Uruguay.
JOSÉ M Venzal   +2 more
exaly   +5 more sources

Localization of Antigenic Sites in Unfed Nymphs of Amblyomma triste Koch 1844 (Acari: Ixodidae) Ticks by Immunohistochemistry

open access: yesTransboundary and Emerging Diseases, 2010
The reactivity of sera collected from guinea pigs after three infestations with Amblyomma triste nymphs on histological sections of the same tick species was investigated through immunohistochemistry to identify potential target cells and tissues. Six guinea pigs were infested thrice, at 30 day intervals, with 30 nymphs of A.
Gervasio Henrique Bechara
exaly   +6 more sources

Amblyomma triste (Koch, 1844) (Acari: Ixodidae): Morphological description of the ovary and of vitellogenesis

open access: yesExperimental Parasitology, 2006
The present study presents the morphology, histology, and the dynamics of vitellogenesis in females of the tick Amblyomma triste. The ovary in this species is of the panoistic type, therefore it lacks nurse cells. It is composed of a layer of epithelial cells that outwardly form the wall of the ovary, but also originate the pedicel, the structure that ...
Patricia Rosa De Oliveira   +2 more
exaly   +5 more sources

Vitellogenesis in the tick Amblyomma triste (Koch, 1844) (Acari: Ixodidae)

open access: yesVeterinary Parasitology, 2007
This study presents new information on the vitellogenesis of the tick Amblyomma triste. In this species, the ovary consists of a layer of epithelial cells, which form the ovarian wall, oogonia and developing oocytes; and the pedicel, a cellular structure
Patricia Rosa De Oliveira   +2 more
exaly   +3 more sources

Life cycle and host specificity of Amblyomma triste (Acari: Ixodidae) under laboratory conditions

open access: yesExperimental and Applied Acarology, 2003
We report biological data of two generations of Amblyomma triste in laboratory and compared the suitability of different host species. Infestations by larval and nymphal stages were performed on guinea pigs (Cavia porcellus), chickens (Gallus gallus), rats (Rattus norvegicus), rabbits (Oryctolagus cuniculus), wild mice (Calomys callosus), dogs (Canis ...
Marcelo B Labruna   +2 more
exaly   +5 more sources

Tick host specificity: An analysis based on host phylogeny and tick ecological features using Amblyomma triste and Amblyomma tigrinum immature stages [PDF]

open access: yesTicks and Tick-borne Diseases, 2018
Here we have evaluated tick host specificity with two different methodological approaches considering Amblyomma tigrinum and Amblyomma triste immatures as targets. Firstly, the Std* index was applied, which considers host phylogenetic relationships weighted by the prevalence of the parasite; followed by generalized linear models to explore associations
Pablo M Beldomenico
exaly   +5 more sources

A Third Amblyomma Species and the First Tick-Borne Rickettsia in Chile

open access: yesJournal of Medical Entomology, 2012
During November 2010, three ticks were collected from three dogs living in the rural area of Arica, northern Chile. Morphological analyses of the ticks in the laboratory revealed that they were most similar to Amblyomma maculatum Koch and Amblyomma ...
Katia Abarca, , João Fabio Soares
exaly   +2 more sources

Rickettsia parkeri infecting free-living Amblyomma triste ticks in the Brazilian Pantanal

open access: yesTicks and Tick-borne Diseases, 2015
The present study evaluated the infection of rickettsiae in 151 Rhipicephalus sanguineus, 59 Amblyomma ovale, 166 Amblyomma triste, one Amblyomma dissimile and four Amblyomma dubitatum ticks collected in the municipality of Poconé, State of Mato Grosso, within the Pantanal biome of Brazil.
Fernanda A Nieri-Bastos   +2 more
exaly   +3 more sources
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Seasonal dynamics and hosts of Amblyomma triste (Acari: Ixodidae) in Argentina

Veterinary Parasitology, 2011
The seasonal dynamics and host usage of Amblyomma triste in Argentina were analyzed. Adults of A. triste were present from early winter to mid-summer, with the peak of abundance from late winter to mid-spring (August to October). Larvae and nymphs were found from December to June, with the peak of abundance in summer.
, Atilio J Mangold, JOSÉ M Venzal
exaly   +3 more sources

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