24 Result(s)
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Rika Umemiya-Shirafuji
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Article
Open AccessInvestigation of vertical and horizontal transmission of Spiroplasma in ticks under laboratory conditions
Many arthropods harbour bacterial symbionts, which are maintained by vertical and/or horizontal transmission. Spiroplasma is one of the most well-known symbionts of ticks and other arthropods. It is still unclear...
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Article
Open AccessRNA activation in ticks
RNA activation (RNAa) is a burgeoning area of research in which double-stranded RNAs (dsRNAs) or small activating RNAs mediate the upregulation of specific genes by targeting the promoter sequence and/or AU-ri...
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Article
Open AccessLocalization of secreted ferritin (FER2) in the embryos of the tick Haemaphysalis longicornis
Despite the absence of a blood meal, embryogenesis involves many processes that require nutrients and other essential elements, including iron. Due to the lack of an external source of these nutrients, these r...
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Article
Effect of α-Tocopheryloxy Acetic Acid on the Infection of Mice with Plasmodium berghei ANKA In Vivo and Humans with P. falciparum In Vitro
Malarial parasites are susceptible to oxidative stress. The effects of α-tocopheryloxy acetic acid (α-TEA), a vitamin E analog, on infection by Plasmodium berghei ANKA and P. falciparum in mice and human red bloo...
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Article
Open AccessData from expressed sequence tags from the organs and embryos of parthenogenetic Haemaphysalis longicornis
Haemaphysalis longicornis is the most important tick species in Japan and has a wide range of vector capacity. Due to its veterinary and medical importance, this tick species has been used as a model for tick/vec...
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Article
Open AccessEffect of α-tocopheryloxy acetic acid, a vitamin E derivative mitocan, on the experimental infection of mice with Plasmodium yoelii
Malaria parasites are known to be vulnerable to oxidative stress. In this study, the effects of the administration of α-tocopheryloxy acetic acid (α-TEA), which is a vitamin E analogue mitocan, on Plasmodium yoel...
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Article
Open AccessSubolesin vaccination inhibits blood feeding and reproduction of Haemaphysalis longicornis in rabbits
Ticks can transmit numerous tick-borne pathogens and cause a huge economic loss to the livestock industry. Tick vaccines can contribute to the prevention of tick-borne diseases by inhibiting tick infestation o...
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Article
Open AccessIntracellular localization of vitellogenin receptor mRNA and protein during oogenesis of a parthenogenetic tick, Haemaphysalis longicornis
Vitellogenin (Vg), a key molecule for oocyte development synthesized in the fat body during blood-feeding, is released into the hemolymph and then taken into the oocytes via Vg receptor (VgR) in ticks. Previously...
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Article
Erratum to: Transovarial persistence of Babesia ovata DNA in a hard tick, Haemaphysalis longicornis, in a semi-artificial mouse skin membrane feeding system
The original version of the article unfortunately contained a mistake.
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Article
Transovarial persistence of Babesia ovata DNA in a hard tick, Haemaphysalis longicornis, in a semi-artificial mouse skin membrane feeding system
Bovine piroplasmosis, a tick-borne protozoan disease, is a major concern for the cattle industry worldwide due to its negative effects on livestock productivity. Toward the development of novel therapeutic and...
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Article
Open AccessEstablishment of a novel tick-Babesia experimental infection model
Ticks are potent vectors of many deadly human and animal pathogens. Tick-borne babesiosis is a well-recognized malaria-like disease that occurs worldwide and recently has attracted increased attention as an em...
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Article
Open Access2-Cys peroxiredoxin is required in successful blood-feeding, reproduction, and antioxidant response in the hard tick Haemaphysalis longicornis
Ticks are obligate hematophagous arthropods that feed on vertebrate blood that contains iron. Ticks also concentrate host blood with iron; this concentration of the blood leads to high levels of iron in ticks....
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Article
Open AccessEmergence of multi-acaricide resistant Rhipicephalus ticks and its implication on chemical tick control in Uganda
Acaricide failure has been on the rise in the western and central cattle corridor of Uganda. In this study, we identified the tick species associated with acaricide failure and determined their susceptibility ...
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Protocol
Host Immunization with Recombinant Proteins to Screen Antigens for Tick Control
Ticks (Parasitiformes: Ixodida) are known for their obligate blood feeding habit and their role in transmitting pathogens to various vertebrate hosts. Tick control using chemical acaricides is extensively used...
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Article
Evaluation of Eimeria krijgsmanni as a murine model for testing the efficacy of anti-parasitic agents
Murine Eimeria spp. have been used as effective models of disease instead of large mammalian hosts such as cattle. We attempted to establish in vivo and in vitro assays using a murine intestinal protozoan, Eimeri...
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Article
Open AccessEvaluation and comparison of the potential of two ferritins as anti-tick vaccines against Haemaphysalis longicornis
Tick control is an essential aspect of controlling the spread of tick-borne diseases affecting humans and animals, but it presently faces several challenges. Development of an anti-tick vaccine is aimed at des...
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Article
Host specificity and in vivo infectivities of the mouse coccidian parasites Eimeria krijgsmanni
In the present study, infection experiments of E. krijgsmanni using various hosts were conducted to elucidate the host specificity among some animals and the infectivity to mouse strains. According to the results...
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Article
Adaptation and immunogenicity of Cryptosporidium parvum to immunocompetent mice
The adaptation and immunogenisity of Cryptosporidium parvum isolated from Siberian chipmunks (SC1 strain) in immunocompetent (ICR) mice were examined. The oocysts were received to the severe combined immunodefici...
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Article
Inhibitory effect of cyclophilin A from the hard tick Haemaphysalis longicornis on the growth of Babesia bovis and Babesia bigemina
Haemaphysalis longicornis is known as one of the most important ticks transmitting Babesia parasites in East Asian countries, including Babesia ovata and Babesia gibsoni, as well as Theileria par...
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Article
RNAi of the translation inhibition gene 4E-BP identified from the hard tick, Haemaphysalis longicornis, affects lipid storage during the off-host starvation period of ticks
4E-BP, an eIF4E-binding protein, is well known as a cap-dependent translation inhibitor. Here, the 4E-BP homolog, Hl4E-BP, was isolated and identified from the hard tick Haemaphysalis longicornis. Hl4E-BP transcr...
