Results 221 to 230 of about 9,556 (254)

Coxiella Symbionts in the Cayenne Tick Amblyomma cajennense

Microbial Ecology, 2011
Members of the Coxiella genus are intracellular bacteria that can infect a variety of animals including humans. A symbiotic Coxiella was recently described in Amblyomma americanum ticks in the Northern Hemisphere with no further investigations of other Amblyomma species in other geographic regions.
Carlos A. G. Soares, Gabrielle Dietrich, Nordin S. Zeidner, Andrias Hojgaard, Joseph Piesman, Michael Levin, Erik Machado-Ferreira   +6 more
openaire   +3 more sources

Acquired resistance of horses to Amblyomma cajennense (Fabricius, 1787) ticks

Veterinary Parasitology, 2003
Acquired immunity of horses to larvae, nymphs and adults of the Amblyomma cajennense tick was evaluated through three consecutive experimental infestations of tick-bite naïve hosts. Data from these infestations were compared to those from field-sensitized horses and donkeys.
Castagnolli, K. C., de Figueiredo, L. B., Santana, D. A., de Castro, M. B., Romano, M. A., Szabo, MPJ   +5 more
openaire   +4 more sources

Impact of climate change on the geographical distribution of ticks of public health significance in Colombia: Amblyomma ovale (Ixodida: Ixodidae), the Amblyomma maculatum (Ixodida: Ixodidae) complex and the Amblyomma cajennense (Ixodida: Ixodidae) complex

Journal of medical entomology
Ticks of the Amblyomma maculatum (Ixodida Ixodidae) complex, the Amblyomma cajennense (Ixodida Ixodidae) complex and Amblyomma ovale (Ixodida Ixodidae) are known to transmit various Rickettsia species in Colombia, but their exact distribution is unknown.
Gina Polo, Jorge Gamarra, L. Robayo-Sánchez, J. A. Cortés-Vecino, Alejandro Ramírez-Hernández   +4 more
semanticscholar   +1 more source

Amblyomma cajennense ticks induce immediate hypersensitivity in horses and donkeys

Experimental & Applied Acarology, 2004
Since host immune reaction to ticks interferes with tick-borne pathogen transmission, it is important to recognize naturally occurring tick-host immune relationships to better understand the epidemiology of such infectious diseases. Amblyomma cajennense is an important tick-borne disease vector in the Neotropical region and horses maintain it in ...
Pablo Juan Szabó, Matias, Carrão Castagnolli, Karina, Álvaro Santana, Danilo, Botelho de Castro, Márcio, Aurélio Romano, Marco   +4 more
openaire   +4 more sources

Oviposition of the Cayenne Tick, Amblyomma cajennense (F.), in the Laboratory1

Annals of the Entomological Society of America, 1975
Some female Cayenne ticks, Amblyomma cajennense (F.), engorged on bovines and held at 27°C, >80% RH, and in 12 h light: 12 h dark oviposited undisturbed; others were disturbed daily by removal of eggs. The average preoviposition period was 6.3 days. For undisturbed females, the avg no. eggs/♀ (6009.9) was significantly correlated with the avg weight/♀ (
T. M. Whetstone, R. O. Drummond
openaire   +2 more sources

Salivary glands of Amblyomma cajennense (Acari: Ixodidae): a histological and an ultrastructural overview

Experimental and Applied Acarology, 2011
The present study on the salivary glands of semi-engorged Amblyomma cajennense females has identified the various cell types present in this tissue and allowed its morphohistochemical characterization. Marking techniques were applied to detect polysaccharides (PAS), proteins (bromophenol blue), lipids (Nile blue) and calcium (von Kossa), as well as ...
Denardi, Sandra Eloisi, Scopinho Furquim, Karim Christina, Bechara, Gervasio Henrique, Camargo-Mathias, Maria Izabel   +3 more
openaire   +4 more sources

Development of Resistance to Nymphs of Amblyomma cajennense Ticks (Acari:Ixodidae) in Dogs

Annals of the New York Academy of Sciences, 2002
Abstract: Ticks have long been regarded as constraints to humans and domestic animals, but hosts often develop resistance to ticks after repeated infestations. The purpose of this investigation was to study the possible acquisition of immunity in domestic dogs to nymphs of A.
Gervásio Henrique Bechara, Luciana S. Mukai, Matias Pablo Juan Szabó, A. Castro Netto   +3 more
openaire   +3 more sources

Acaricidal activity of thymol on larvae and nymphs of Amblyomma cajennense (Acari: Ixodidae)

Veterinary Parasitology, 2011
The aim of the present study was to evaluate the acaricidal efficacy of thymol on unengorged and engorged larvae and engorged nymphs of Amblyomma cajennense. To perform the test for unengorged larvae, the larval packet technique was employed and mortality was evaluated 24h after the test, while for engorged larvae and engorged nymphs the immersion ...
Tainara Massoni, Ralph Maturano, Erik Daemon, Caio Márcio de Oliveira Monteiro, Fernanda Calmon Brito, Andressa da Silva Mendes   +5 more
openaire   +3 more sources

Natural Infection of the Tick, Amblyomma Cajennense, with Rickettsia Rickettsii in Panama

The American Journal of Tropical Medicine and Hygiene, 1953
The occurrence of Rocky Mountain spotted fever on the Isthmus of Panama was established for the first time in 1950 when a highly virulent strain of Rickettsia rickettsii was isolated by the author from the blood of a 26 year old Panamanian farmer who died February 8 of that year, shortly after admission to the hospital.
openaire   +3 more sources

Hypersensitivity Induced in Dogs by Nymphal Extract of Amblyomma cajennense Ticks (Acari:Ixodidae)

Annals of the New York Academy of Sciences, 2002
Abstract: In general, hosts develop resistance to ticks after repeated infestations; nevertheless, several studies on naturally occurring host‐tick interactions were unable to detect resistance of hosts to ticks even after repeated infestations. The purpose of this investigation was to study the type of cutaneous hypersensitivity to unfed nymphal ...
Mukai, Luciana S., Castro Netto, A., Szabó, M. P J, Bechara, G. H.   +3 more
openaire   +4 more sources