Results 201 to 210 of about 10,174 (231)
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Veterinary parasitology
The objective of this study was to evaluate the efficacy of different chemical groups, approved as acaricide to Rhipicephalus microplus, against ticks from the Amblyomma cajennense complex parasitizing cattle under laboratory and field conditions ...
P. S. Sebastian +5 more
semanticscholar +1 more source
The objective of this study was to evaluate the efficacy of different chemical groups, approved as acaricide to Rhipicephalus microplus, against ticks from the Amblyomma cajennense complex parasitizing cattle under laboratory and field conditions ...
P. S. Sebastian +5 more
semanticscholar +1 more source
Natural Infection of the Tick, Amblyomma Cajennense, with Rickettsia Rickettsii in Panama
The American Journal of Tropical Medicine and Hygiene, 1953The 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.
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Acaricidal activity of thymol on larvae and nymphs of Amblyomma cajennense (Acari: Ixodidae)
Veterinary Parasitology, 2011The 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 ...
Andressa da Silva, Mendes +5 more
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Experimental and Applied Acarology, 2011
The present study evaluated the reproductive compatibility of the crosses between adult ticks of the following three geographically different populations of Amblyomma cajennense: State of São Paulo (SP), southeastern Brazil; State of Rondônia (RO), northern Brazil; and Colombia (CO). In addition, crosses between A.
Marcelo B Labruna, Herbert S Soares
exaly +3 more sources
The present study evaluated the reproductive compatibility of the crosses between adult ticks of the following three geographically different populations of Amblyomma cajennense: State of São Paulo (SP), southeastern Brazil; State of Rondônia (RO), northern Brazil; and Colombia (CO). In addition, crosses between A.
Marcelo B Labruna, Herbert S Soares
exaly +3 more sources
Veterinary Parasitology, 2004
In this work we describe the internal morphology of the female reproductive system of the cayenne tick Amblyomma cajennense. This system is represented by a panoistic ovary, which lacks nurse cells in the germarium. This ovary consists of a single tube, in which a large number of oocytes develop asynchronously, thus accompanying the processes of yolk ...
Denardi, S. E. +5 more
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In this work we describe the internal morphology of the female reproductive system of the cayenne tick Amblyomma cajennense. This system is represented by a panoistic ovary, which lacks nurse cells in the germarium. This ovary consists of a single tube, in which a large number of oocytes develop asynchronously, thus accompanying the processes of yolk ...
Denardi, S. E. +5 more
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Hypersensitivity Induced in Dogs by Nymphal Extract of Amblyomma cajennense Ticks (Acari:Ixodidae)
Annals of the New York Academy of Sciences, 2002Abstract: 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. +3 more
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Veterinary Parasitology, 2002
The objective of this study was to investigate some aspects of horse resistance to natural infestations of Anocentor nitens and Amblyomma cajennense over a 2-year period. Free-living stages of A. nitens were used to evaluate the influence of season of the year on horse resistance.
L M F, Borges +3 more
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The objective of this study was to investigate some aspects of horse resistance to natural infestations of Anocentor nitens and Amblyomma cajennense over a 2-year period. Free-living stages of A. nitens were used to evaluate the influence of season of the year on horse resistance.
L M F, Borges +3 more
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Experimental Transmission of Q Fever by Amblyomma Cajennense
The American Journal of Tropical Medicine and Hygiene, 1949Since Davis and Cox (1) first isolated the causative agent of Q fever from Dermacentor andersoni, several species of ticks have been incriminated in the epidemiology of this disease in various parts of the world. Investigations implicating the following species were reviewed by Kohls in 1948 (2): in Australia, Haemaphysalis humerosa and H.
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