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Title: Vector competence of Amblyomma americanum (Acari: Ixodidae) for Rickettsia rickettsii

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1415541
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Ticks and Tick-borne Diseases
Additional Journal Information:
Journal Volume: 8; Journal Issue: 4; Related Information: CHORUS Timestamp: 2018-01-03 19:54:05; Journal ID: ISSN 1877-959X
Publisher:
Elsevier
Country of Publication:
Country unknown/Code not available
Language:
English

Citation Formats

Levin, Michael L., Zemtsova, Galina E., Killmaster, Lindsay F., Snellgrove, Alyssa, and Schumacher, Lauren B. M.. Vector competence of Amblyomma americanum (Acari: Ixodidae) for Rickettsia rickettsii. Country unknown/Code not available: N. p., 2017. Web. doi:10.1016/j.ttbdis.2017.04.006.
Levin, Michael L., Zemtsova, Galina E., Killmaster, Lindsay F., Snellgrove, Alyssa, & Schumacher, Lauren B. M.. Vector competence of Amblyomma americanum (Acari: Ixodidae) for Rickettsia rickettsii. Country unknown/Code not available. doi:10.1016/j.ttbdis.2017.04.006.
Levin, Michael L., Zemtsova, Galina E., Killmaster, Lindsay F., Snellgrove, Alyssa, and Schumacher, Lauren B. M.. 2017. "Vector competence of Amblyomma americanum (Acari: Ixodidae) for Rickettsia rickettsii". Country unknown/Code not available. doi:10.1016/j.ttbdis.2017.04.006.
@article{osti_1415541,
title = {Vector competence of Amblyomma americanum (Acari: Ixodidae) for Rickettsia rickettsii},
author = {Levin, Michael L. and Zemtsova, Galina E. and Killmaster, Lindsay F. and Snellgrove, Alyssa and Schumacher, Lauren B. M.},
abstractNote = {},
doi = {10.1016/j.ttbdis.2017.04.006},
journal = {Ticks and Tick-borne Diseases},
number = 4,
volume = 8,
place = {Country unknown/Code not available},
year = 2017,
month = 6
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 22, 2018
Publisher's Accepted Manuscript

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  • Amblyomma americanum males were treated with 0.5, 1, 2, 3, 4, 8, and 16 krad of gamma radiation. Testes of ticks treated with 2, 3, 4, 8, and 16 krad were smaller than those of ticks irradiated at lower levels and controls. No recognizable alteration in timing of spermatogenesis was noted among the different radiation groups, but severe breakdown and depletion of germinal cells was noted at 4, 8, and 16 krad. Percent hatch of larvae from crosses of irradiated males and untreated females decreased with increasing radiation level. No hatch was observed from eggs of females mated to malesmore » treated at 2 krad or higher.« less
  • The residual effects of several reduced-risk and conventional miticides were evaluated in strawberries (Fragaria z ananassa Duchesne) on the twospotted spider mite (TSSM), Tetranychus urticae Koch (Acari: Tetranychidae) and on 2 predatory mites, Neoseiulus californicus McGregor and Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae). Experiments were conducted in the laboratory and greenhouse. The greenhouse experiments also tested the direct effects of the miticides on TSSM. The efficacy of conventional and reduced-risk miticides was evaluated on strawberry leaf discs and on whole plants for control of TSSM. Furthermore, the residual effects of these miticides were evaluated on whole strawberry plants against selective predatorymore » mites. For TSSM, 5 treatments were evaluated: a conventional miticide; fenbutatin-oxide (Vendex[reg]) and 3 reduced-risk miticides; binfenazate (Acramite 50WP[reg]), activated garlic extract (Repel[reg]), sesame seed and castor oil (Wipeout[reg]), and a water-treated control. For predatory mites, the residual effects of only Acramite[reg] and Vendex[reg] were evaluated. Acramite[reg] was the most effective acaricide in reducing TSSM populations in both the laboratory and greenhouse experiments. Vendex[reg] and Wipeout[reg] were also effective in the laboratory, but did not cause significant reduction of TSSM in the greenhouse. Repel[reg] was the least effective of the 4 pesticides evaluated. Neither Acramite[reg] nor Vendex[reg] had a significant effect on either predatory mite species. However, there appeared to be more predatory mites on the Vendex[reg]-treated plants than on the Acramite[reg]-treated plants. There were significantly more predatory mites of both species on the cue plants, which were inoculated with TSSM versus the non-cue plants, which were not inoculated. (author) [Spanish] Los efectos residuales en poblaciones de la 'arana roja', Tetranychus urticae Koch (Acari: Tetranichidae) y de los acaros predadores Neoseiulus californicus McGregor y Phytoseilus persimilis Athias-Henriot (Acari: Phytoseiidae) causados por varios acaricidas convencionales y de riesgo-reducido fueron evaluados en fresas (Fragaria x ananassa Duchense). Los experimentos fueron realizados en laboratorio e invernadero. Los experimentos en el invernadero evaluaron tambien el efecto directo de los acaricidas en la 'arana roja'. La eficacia para controlar la 'arana roja' de los acaricidas convencionales y de riesgo-reducido fue evaluada en discos de las hojas y en plantas de fresa, y los efectos residuales de los acaricidas en los acaros predadores fueron evaluados en plantas completas. Para la 'arana roja' se evaluaron cinco tratamientos: el acaricida convencional fenbutatin-oxido (Vendex[reg]), 3 acaricidas de riesgo-reducido binfenazate (Acaramite 50WP[reg]), extracto de ajo activado (Repel[reg]), aceite de semillas de ajonjoli y ricino (Wipeout[reg]) y un control tratado con agua. Para los acaros predadores solamente los efectos de Acaramite[reg] y Vendex[reg] fueron evaluados. Acaramite[reg] fue el tratamiento mas efectivo para la 'arana roja' en el laboratorio y el invernadero. Vendex[reg] y Wipeout[reg] fueron tambien efectivos en el laboratorio, pero no causaron una reduccion significativa de 'aranas rojas' en el invernadero. Repel[reg] fue el tratamiento evaluado menos eficaz. Ni Acaramite[reg] ni Vendex[reg] redujeron significativamente las poblaciones de acaros predadores. Sin embargo, aparentemente hay mas acaros predadores en Vendex[reg] que en Acaramite[reg]. Tambien se encontraron significativamente mas acaros predadores en plantas inoculadas que en plantas no inoculadas. (author)« less
  • The growth of Rickettsia mooseri was accelerated and quantitatively increased in embryonate eggs containing tritium oxide at levels of 180, 90, and 45 mc/egg during the growth period. The eggs of a group containing 22.5 mc/egg showed only a slight increase in the rate of growth of organisms; the infections in the eggs of a group glven 11.2 mc/egg did not differ significantly from those of the control group. On the other hand, growth of R. akari was inhibited in embryonate eggs containing tritium oxide at levels of l80, 90, and 45 mc/egg, and partially inhibited in groups containing 22.5more » and 1l.2 mc/egg. The patterns of growth of R. mooseri and of R. akari exposed to tritium oxide for 6 hours prior to inoculation into embryonate eggs did not differ significantly from that of the control group. Single and divided doses of x rays to the host resulted in partial inhibition of the growth of R. akari. (auth)« less