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Volume 56, Number 2 >

Effects of anti-tick cocktail vaccine against Rhipicephalus appendiculatus

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Title: Effects of anti-tick cocktail vaccine against Rhipicephalus appendiculatus
Authors: Imamura, Saiki Browse this author
Konnai, Satoru Browse this author →KAKEN DB
da Silva Vaz, Itabajara Junior Browse this author
Yamada, Shinji Browse this author
Nakajima, Chie Browse this author
Ito, Yuko Browse this author
Tajima, Tomoko Browse this author
Yasuda, Jun Browse this author
Simuunza, Martin Browse this author
Onuma, Misao Browse this author
Ohashi, Kazuhiko Browse this author
Keywords: anti-tick vaccine
Theileria parva
Issue Date: Aug-2008
Publisher: The Graduate School of Veterinary Medicine, Hokkaido University
Journal Title: Japanese Journal of Veterinary Research
Volume: 56
Issue: 2
Start Page: 85
End Page: 98
Abstract: Rhipicephalus appendiculatus serpin-3 (RAS-3), R. appendiculatus serpin-4 (RAS-4) and a 36-kDa immuno-dominant protein of R. appendiculatus (RIM36) were reported as candidate antigens for the anti-tick vaccine to control ixodid ticks. In the present study, we generated recombinant proteins of RAS-3 (rRAS-3), RAS-4 (rRAS-4) and RIM36 (rRIM36), and assessed their potency as an anti-tick cocktail vaccine in cattle model. RT-PCR analysis showed that RAS-3, RAS-4 and RIM36 transcripts were detected in both adult male and female ticks during feeding. Immunization of cattle with the combination of rRAS-3, rRAS-4 and rRIM36 had raised antibodies against all recombinants and anti-sera had reacted with the molecules from the tick salivary gland extract. Tick infestation challenge demonstrated protective immunity against female ticks, resulting in mortality rates of 39.5 and 12.8 % for the vaccinated and control groups, respectively. Moreover, the mortality rate of Theileria parva-infected female ticks was 48.5 and 10.8 % in the vaccinated and control group, respectively. In order to evaluate the levels of pathogen transmission capacity by T. parva-infected ticks fed on immunized cattle, the occurrence of T. parva in the bovine parotid lymph node and peripheral blood was also determined and quantified by real-time PCR. Although the infection with T. parva could not be protected by the vaccine, the occurrence of pathogen in peripheral blood was delayed 1 to 2 days after the infestation challenge in vaccinated group. These results suggest that this cocktail vaccine plays a role in the prevention of tick infestation.
Type: bulletin (article)
Appears in Collections:Japanese Journal of Veterinary Research > Volume 56, Number 2

Submitter: 獣医学部図書室

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