Results 1 to 10 of about 6,672 (149)

First report of Amblyomma sculptum (Amblyomma cajennense complex) in a Brazilian state classified as a silent area for human rickettsiosis [PDF]

Veterinary World, 2023
Background and Aim: Studies on ticks of public health concern in equine husbandry are scarce in the Northeastern region of Brazil. This study aimed to investigate the presence of ticks on horses in the State of Alagoas, which is classified as a silent ...
Bruna Costa da Gama, Thiago Fernandes Martins, Marcelo Bahia Labruna, Rafael Felipe da Costa Vieira, Jonatas Campos de Almeida   +4 more
doaj   +4 more sources

Fluazuron Baits in the Control of Amblyomma sculptum Tick: Efficacy and Pharmacokinetics Using Guinea Pigs as an Experimental Model [PDF]

Pathogens
The tick Amblyomma sculptum is the vector of the bacterium Rickettsia rickettsii (which causes Brazilian Spotted Fever in humans). It can be found in domestic and wild animals, as well as humans. The objective of this work was to evaluate the efficacy of
Debora Azevedo Borges, Isabelle Vilela Bonfim, Clara Rodrigues Dutra, Ingrid Lins Raquel de Jesus, Rayane Monteiro, Rayane Christine Pereira de Assis, Fernando Rocha Miranda, Yara Peluso Cid, Fabio Barbour Scott   +8 more
doaj   +3 more sources

Seasonal dynamics of Amblyomma sculptum: a review [PDF]

Parasites & Vectors, 2022
Background Amblyomma sculptum is a hard tick that is associated with domestic animals and the transmission of Brazilian spotted fever. This association has motivated several field studies on this ixodid tick within its distribution area in South America.
Luiza Gabriella Ferreira de Paula, Rafael Moreira do Nascimento, Artur de Oliveira Franco, Matias Pablo Juan Szabó, Marcelo Bahia Labruna, Caio Monteiro, Felipe da Silva Krawczak   +6 more
doaj   +2 more sources

Cellular immune response of Amblyomma sculptum and Amblyomma americanum to entomopathogenic fungi: Implications for biological tick control. [PDF]

Med Vet Entomol
Amblyomma sculptum showed a plasmatocyte‐dominant haemocyte profile. Beauveria bassiana increased plasmatocytes and reduced granulocytes, whereas Metarhizium robertsii did not cause significant changes. Amblyomma americanum showed a granulocyte‐dominant haemocyte profile. Beauveria bassiana reduced total haemocytes and granulocytes. B.
Ribeiro-Silva CS, Lima VH, Pinto SMN, Sandes GFS, Costa VHR, Mulenga A, Oliva Chavez AS, Fernandes ÉKK.   +7 more
europepmc   +2 more sources

Amblyomma cajennense Sensu Stricto (Fabricius, 1787) and Amblyomma sculptum (Berlese, 1888) Tick Saliva Elicit Immune-Modulatory Activity in Isolated Murine Macrophages With an Insight Into Proteomic Analysis. [PDF]

Parasite Immunol
ABSTRACT Tick saliva is known to cause immunosuppression and help pathogen transmission. Amblyomma sculptum is a public health concern as a vector of Rickettsia rickettsii. Another close‐related species is Amblyomma cajennense sensu stricto (s.s.). The impact of saliva from these species on murine macrophages remains unclear.
Aguirre AAR, Dos Reis VP, Setúbal SDS, Carioca ALPM, Tavares KM, Evaristo GPC, Evaristo JAM, Nogueira FCS, Medeiros JF, Zuliani JP.   +9 more
europepmc   +2 more sources

DEET-cyclodextrin inclusion complexes for mosquito and tick repellency: Extended repellency time and no zebrafish embryotoxicity. [PDF]

Pest Manag Sci
Hydroxypropyl‐β‐cyclodextrin (HPβCD)–N,N‐diethyl‐meta‐toluamide (DEET) complex extended tick repellency to 168 h. Full protection against Aedes aegypti for 7 h with HPβCD‐DEET. HPβCD reduced DEET release and skin retention significantly. No embryotoxicity observed below 325 mg L−1 in zebrafish model.
Pereira GRS, Cardoso G, Camargo MLK, Machado MR, Barrozo MM, Rodrigues J, de Oliveira GAR, Monteiro C, Luz C, Marreto RN, Taveira SF.   +10 more
europepmc   +2 more sources

Comparative Susceptibility of Different Populations of Amblyomma sculptum to Rickettsia rickettsii [PDF]

Frontiers in Physiology, 2019
The bacterium Rickettsia rickettsii is the etiological agent of Brazilian spotted fever (BSF), which is transmitted in Brazil mainly by the tick Amblyomma sculptum. Herein, larvae and nymphs of six populations of A. sculptum were exposed to R. rickettsii
Monize Gerardi, Alejandro Ramírez-Hernández, Lina C. Binder, Felipe S. Krawczak, Fábio Gregori, Marcelo B. Labruna   +5 more
doaj   +2 more sources

Ticks on wild vertebrates necropsied in a veterinary pathology service in central Brazil: species richness and pathogen screening [PDF]

Revista Brasileira de Parasitologia Veterinária
During 2022-2024, fresh carcasses of 35 wild animals from Goiás state and the Federal District, both in central Brazil, were sent to the veterinary pathology service of the University of Brasília.
Igor Silva Silito, Matheus Pasini-Martins, Isabella Pereira Pesenato, Marcelo Bahia Labruna, Márcio Botelho de Castro, Liz de Albuquerque Cerqueira, Thiago Fernandes Martins   +6 more
doaj   +3 more sources

Automated identification of spotted-fever tick vectors using convolutional neural networks. [PDF]

Med Vet Entomol
We evaluate the performance of convolutional neural networks (CNN) AlexNet, ResNet‐50 and MobileNetV2 for the automated identification of tick species capable of transmitting spotted fever. CNNs achieved accuracy rates of ~90% in identifying ticks and showed sensitivities of 59%–100% according to species, sex, position or image resolution.
Gomes IRC, Miranda VL, Leal JFC, Oliveira IP, Silva PJ, Bitencourth K, Rodrigues CM, Siqueira LR, Labruna MB, Gazeta GS, Amorim M, Gurgel-Gonçalves R.   +11 more
europepmc   +2 more sources

Amblyomma sculptum Salivary PGE2 Modulates the Dendritic Cell-Rickettsia rickettsii Interactions in vitro and in vivo [PDF]

Frontiers in Immunology, 2019
Amblyomma sculptum is an important vector of Rickettsia rickettsii, causative agent of Rocky Mountain spotted fever and the most lethal tick-borne pathogen affecting humans. To feed on the vertebrate host's blood, A. sculptum secretes a salivary mixture,
Eliane Esteves, Bruna Bizzarro, Francisco Borges Costa, Alejandro Ramírez-Hernández, Ana Paula Ferranti Peti, Allan Henrique Depieri Cataneo, Pryscilla Fanini Wowk, Rodolfo Pessato Timóteo, Marcelo Bahia Labruna, Pedro Ismael Silva Junior, Célio Lopes Silva, Lúcia Helena Faccioli, Andréa Cristina Fogaça, Andréa Cristina Fogaça, Carlos Arterio Sorgi, Anderson Sá-Nunes, Anderson Sá-Nunes   +16 more
doaj   +2 more sources