Results 21 to 30 of about 9,556 (254)

Inhibition of the classical pathway of the complement system by saliva of Amblyomma cajennense (Acari: Ixodidae). [PDF]

Exp Parasitol, 2016
Inhibition of the complement system during and after haematophagy is of utmost importance for tick success in feeding and tick development. The role of such inhibition is to minimise damage to the intestinal epithelium as well as avoiding inflammation and opsonisation of salivary molecules at the bite site.
Franco PF, Silva NC, Fazito do Vale V, Abreu JF, Santos VC, Gontijo NF, Valenzuela JG, Pereira MH, Sant'Anna MR, Gomes AP, Araujo RN.   +10 more
europepmc   +6 more sources

Rickettsia infection in Amblyomma tonelliae, a tick species from the Amblyomma cajennense complex

Ticks and Tick-borne Diseases, 2015
The present study was performed to evaluate the Rickettsia infection in Amblyomma tonelliae ticks from Argentina. All ticks were subjected to DNA extraction and tested by a battery of PCRs to amplify fragments of four rickettsial genes, 23S-5S, gltA, ompA and htrA. Two ticks were positive.
Tarragona, Evelina Luisa, Cicuttin, Gabriel L., Mangold, Atilio Jose, Mastropaolo, Mariano, de Salvo, María Nazarena, Nava, Santiago   +5 more
openaire   +5 more sources

Experimental infection and vector competence of Amblyomma patinoi, a member of the Amblyomma cajennense species complex, for the human pathogen Rickettsia rickettsii

Ticks and Tick-borne Diseases, 2021
Amblyomma patinoi ticks infected with Rickettsia rickettsii are present in Colombia, but its vector competence is unknown. Hence, we evaluated the vector competence of A. patinoi with R. rickettsii under laboratory conditions. Experimental guinea pigs and rabbits (males and females) were separated in the infected group (IG) and the control group (CG ...
Heidy-C Martínez-Diaz, Elkin Forero-Becerra, Marylin Hidalgo, Marcelo B. Labruna   +3 more
openaire   +4 more sources

Ambush behavior of the tick Amblyomma sculptum ( Amblyomma cajennense complex) (Acari: Ixodidae) in the Brazilian Pantanal

Ticks and Tick-borne Diseases, 2017
We herein describe the ambush behavior of Amblyomma sculptum (Berlese 1888), a widespread and epidemiologically important tick in Brazil. Along two years of sampling by visual search in the Brazilian Pantanal, A. sculptum ticks were observed on the vegetation and in the leaf litter. Most of the ticks were observed between 10 and 50cm above ground level
Vanessa do Nascimento Ramos, Ubiratan Piovezan, Carolina Fonseca Osava, Matias Pablo Juan Szabó   +3 more
openaire   +4 more sources

Comparative survival of the engorged stages of Amblyomma cajennense sensu stricto and Amblyomma sculptum under different laboratory conditions

Ticks and Tick-borne Diseases, 2018
Recent studies indicated that the taxon Amblyomma cajennense (Fabricius, 1787) is a complex of 6 valid species, of which only two, Amblyomma cajennense sensu stricto (s.s.) and Amblyomma sculptum Berlese, 1888 are present in Brazil; the former species is found exclusively in areas of the Amazon biome, and A.
M. Labruna
openaire   +3 more sources

Seasonal dynamics of Amblyomma cajennense (Fabricius, 1787) sensu stricto in a degraded area of the Amazon biome, with notes on Rickettsia amblyommatis infection. [PDF]

Parasit Vectors, 2023
Background The tick Amblyomma cajennense sensu stricto ( A. cajennense s.s.) frequently parasitizes animals and humans in the Amazon biome, in addition to being a vector of Rickettsia amblyommatis .
de Araújo FES, Martins TF, Ramos CCM, Nogueira RMS, Faccini JLH, Tavares MA, de Lima NJ, de Almeida Júnior EB, de Sousa-Paula LC, Dantas-Torres F, da Silva Krawczak F, Costa-Junior LM, Labruna MB, Dall Agnol LT, Luz HR.   +14 more
europepmc   +2 more sources

Seasonal dynamics of the Cayenne tick, Amblyomma cajennense on horses in Brazil [PDF]

Medical and Veterinary Entomology, 2003
Abstract.  The population dynamics of all stages of the Cayenne tick, Amblyomma cajennense (Fabricius) (Acari: Ixodidae) on horses was evaluated over a period of 2 years in the district of Pedro Leopoldo, State of Minas Gerais, Brazil. Every 14 days, the left side of 20 horses was brushed for collection of immature stages; counts of adults were also ...
Paulo Roberto de Oliveira, Lígia Miranda Ferreira Borges, R.C. Leite, Carolina Maria Vianna de Freitas   +3 more
openalex   +4 more sources

Lack of parthenogenesis by Amblyomma cajennense (Acari: Ixodidae) [PDF]

Memórias do Instituto Oswaldo Cruz, 2002
Some reproductive parameters of adult stages of Amblyomma cajennense ticks were studied. The capacity of virgin females to reproduce by parthenogenesis was evaluated, during an experimental infestation, in absence of males, on a horse (Equus cabalus). Ticks were spread either completely free or in limited sites on the body of the animal.
Carolina MV de Freitas, Romário C Leite, Cristina ML Lopes, Daniel Sobreira Rodrigues, Gustavo Fontes Paz, Paulo Roberto de Oliveira   +5 more
openalex   +7 more sources

Laboratory evaluation of the efficacy of lotilaner (Credelio™) against Amblyomma cajennense (sensu lato) infestations of dogs. [PDF]

Parasit Vectors, 2018
The ixodid tick Amblyomma cajennense (sensu lato) complex, widespread throughout South and Central America, is also present in Mexico, Texas and Florida.
Lasmar PVF, Murphy M, Nanchen S, Drake J, Coumendouros K, Borges DA, de Oliveira PC, Scott FB.   +7 more
europepmc   +2 more sources

Immunosuppressive effects of Amblyomma cajennense tick saliva on murine bone marrow-derived dendritic cells. [PDF]

Parasit Vectors, 2015
BackgroundDendritic cells (DCs) are professional antigen-presenting cells with vital roles in the activation of host immunity. Ticks are bloodsucking arthropods that secrete bioactive compounds with immunomodulatory properties via their saliva.
Carvalho-Costa TM, Mendes MT, da Silva MV, da Costa TA, Tiburcio MG, Anhê AC, Rodrigues V, Oliveira CJ.   +7 more
europepmc   +2 more sources