New PDF release: Advances in Disease Vector Research

By Yasuo Chinzei, DeMar Taylor (auth.), Kerry F. Harris (eds.)

ISBN-10: 1461225906

ISBN-13: 9781461225904

ISBN-10: 1461275962

ISBN-13: 9781461275961

Volume 10 of Advances in affliction Vector learn contains seven chapters on vectors that have an effect on human or animal wellbeing and fitness and 6 chapters on plant pathogens and their vectors. In bankruptcy 1, Yasuo Chinzei and DeMar Taylor talk about hormonal rules of vitellogenesis in ticks. Many blood sucking bugs and ticks transmit pathogens via engorgement, which induces vitellogenesis and oviposition in grownup animals. to enquire the pathogen transmission mechanism in vector animals, details at the host physiological and endocrinological stipulations after engorgement comes in handy and demanding simply because pathogen improvement or proliferation happens within the vector hosts whilst the host replica. Chinzei and Taylor have proven that during ticks, juvenile hormone (JH) isn't all for the endocrinological strategies inducing vitellogenin biosynthesis. Synganglion (tick mind) factor(s) (vitellogenesis inducing issue, VIF) is extra vital to start up vitellogenesis after engorgement, and ecdysteroids also are relating to induction of vitellogenin synthesis. of their bankruptcy, established as a rule on their lonesome experimental information, the authors talk about the characterization of major yolk protein, vitellogenin (Vg) , biosynthesis and processing within the fats physique, and hormonal legislation of Vg synthesis in tick structures, together with ixodid and argasid ticks.

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61). Stimulation of Vg synthesis by synganglion extracts from replete Hyalomma dromedarii was shown in cultured fed virgin female fat bodies (66). Similar stimulation also was observed in vivo in this species (66). Therefore, the presence of a vitellogenesis-inducing factor (VIF) in both soft and hard ticks as the first factor in the regulation of vitellogenesis is well supported. Based on the known systems of regulation if vitellogenesis in the mosquito, chicken and frog, Chinzei and Taylor (20) speculated that the second factor is a steroid hormone and that it is produced in the ovary.

71. B. 1986. Anti-juvenile hormone agents. Annu. Rev. Entomol. 31 :391-429. 72. R. 1978. Induction and regulation of vitellogenin synthesis by estrogen. In G. , Biochemical Actions of Hormones, Vol. 5. Academic Press, New York, pp. 397-431. 73. J. 1971. Electrophoretic studies on the proteins of the haemolymph, saliva and eggs of the cattle tick Boophilus microplus. Insect Biochem. 1:47-55. 74. , and Ando, K. 1991. Stimulation of vitellogenesis by pyrethroids in mated and virgin female adults, male adults and fourth instar females of Ornithodoros moubata (Acari: Argasidae).

S. 1972. Blood sucking ticks (Ixodoidae): Vectors of diseases of man and animals. Misc. Pub!. Entomol. Soc. Am. 8:161. 5. A. 1974. Argas (Persicargas) arboreus: Juvenile hormone analog termination of diapause and oviposition control. Exp. Parasitol. 36:34-39. 6. D. 1972. Structure of the circulatory, nervous, and neuroendocrine systems of ticks. D. Obenchain and R. , Physiology of Ticks. Pergamon Press, Oxford, pp. 351-398. 7. C. 1986. Ultrastructure of the tick neuroendocrine system. R. A. , Morphology, Physiology and Behavioral Biology of Ticks.

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Advances in Disease Vector Research by Yasuo Chinzei, DeMar Taylor (auth.), Kerry F. Harris (eds.)

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