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Gynandromorphism in Amblyomma cajennense and Rhipicephalus sanguineus (Acari: Ixodidae)
The Journal of Parasitology, 2002During a survey of ticks on horses in November 2000, at the University of São Paulo farm in Pirassununga county, São Paulo, Brazil, 1 gynandromorph of Amblyomma cajennense was collected from a naturally infested horse. In another survey on dogs in March 2001, in the urban area of Monte Negro, Rondônia, Brazil, a gynandromorph of Rhipicephalus ...
Erney P. Camargo +4 more
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Effects of aggregation on the reproductive biology of Rhipicephalus sanguineus females [PDF]
Experimental and Applied Acarology, 2011 The brown dog tick Rhipicephalus sanguineus is one of the most important tick species in both veterinary and human medicine. Studies on the biology of this tick are pivotal in order to develop improved control strategies. The brown dog tick is a gregarious species, tending to form large clusters in highly infested environments.
Dantas Torres F, OTRANTO, Domenico
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A case of gynandromorphism in Rhipicephalus sanguineus s.l. from Mexico
Experimental and Applied Acarology, 2020We report the presence of a brown dog tick (Rhipicephalus sanguineus s.l.) gynandromorph collected inside a house in the state of Guanajuato, Mexico. This work provides the first report of gynandromorphism in a tick from Mexico, and represents the third report of this condition in R. sanguineus s.l. in the world.
Beatriz Salceda-Sánchez +3 more
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Nature, 1977
STUDIES of reactivity to tick bites and tick salivary gland homogenate have revealed responses similar to those induced by histamine in the skin of lop-eared rabbits2. Salivary gland homogenates of the tick Rhipicephalus sanguineus sanguineus, however, did not cause contraction of guinea pig ileum, but blocked the action of histamine acid phosphate ...
E. Ayitey-Amith, W. A. Chinery
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STUDIES of reactivity to tick bites and tick salivary gland homogenate have revealed responses similar to those induced by histamine in the skin of lop-eared rabbits2. Salivary gland homogenates of the tick Rhipicephalus sanguineus sanguineus, however, did not cause contraction of guinea pig ileum, but blocked the action of histamine acid phosphate ...
E. Ayitey-Amith, W. A. Chinery
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Experimental and Applied Acarology, 2014
Metalloproteases (MPs) have been considered essential for blood feeding and other physiological functions in several hematophagous animals, including ticks. We report the characterization of MP sequences of three important ticks from Asia, Africa and America: Ixodes persulcatus (Ip-MPs), Rhipicephalus sanguineus (Rs-MPs) and R.
Kazuhiko Ohashi +9 more
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Metalloproteases (MPs) have been considered essential for blood feeding and other physiological functions in several hematophagous animals, including ticks. We report the characterization of MP sequences of three important ticks from Asia, Africa and America: Ixodes persulcatus (Ip-MPs), Rhipicephalus sanguineus (Rs-MPs) and R.
Kazuhiko Ohashi +9 more
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Effect of egg clustering on the fitness of Rhipicephalus sanguineus larvae
Parasitology Research, 2012Several biological aspects of Rhipicephalus sanguineus have been studied, but scant information is available on the effect of egg clustering on incubation period and larval survival. Herein, R. sanguineus eggs were separated in groups composed by 1 (GI), 10 (GII), 50 (GIII), 100 (GIV), 500 (GV) and 1,000 (GVI) eggs (10 replicates), and incubation and ...
Alessio Giannelli +4 more
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Comparative Profiling of MicroRNAs in Male and Female Rhipicephalus sanguineus
Applied Biochemistry and Biotechnology, 2015Rhipicephalus sanguineus is an ectoparasite of medical and veterinary significance, which can transmit a number of pathogens including Babesia canis, Ehrlichia canis, and Rickettsia conorii. MicroRNAs (miRNAs) are recognized as regulators in sex differentiation in dioecious species.
Chang-Chun Shao +4 more
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Rhipicephalus sanguineus: Sequential histopathology at the host-arthropod interface
Experimental Parasitology, 1974Abstract The reaction beneath the mouth parts of an adult, female Rhipicephalus sanguineus attached to a dog develops progressively over 4–5 days. The cement substance is confined to the external surface of the epidermis and does not form any organized structure in the dermis. The hypostome is imbedded in the cement substance and does not penetrate
J.H. Theis, P.D. Budwiser
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Rhipicephalus sanguineus: Amino acid composition of egg shell
Experimental Parasitology, 1971Abstract Acid hydrolysis of the protein fraction of a batch of egg shells of Rhipicephalus sanguineus was followed by determination of the amino acids in the hydrolysate. Using thin layer chromatography, the amino acids—lysine, arginine, aspartic acid, serine, glycine, glutamic acid, alanine, threonine, valine, tyrosine, isoleucine, and leucine ...
Veronica L. Butler, Benedict J. Jaskoski
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The Journal of Parasitology, 1981
Intracutaneous injection of histamine acid phosphate (HAP) and salivary gland extract (SGE) of Haemaphysalis spinigera and Rhipicephalus sanguineus sanguineus into sensitized and nonsensitized rabbits previously injected intravenously with Evans blue indicated that the ticks' saliva contained a pharmacodynamic substance in addition to having antigenic ...
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Intracutaneous injection of histamine acid phosphate (HAP) and salivary gland extract (SGE) of Haemaphysalis spinigera and Rhipicephalus sanguineus sanguineus into sensitized and nonsensitized rabbits previously injected intravenously with Evans blue indicated that the ticks' saliva contained a pharmacodynamic substance in addition to having antigenic ...
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