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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >Reservoir competence of four chaparral-dwelling rodents for Borrelia burgdorferi in California.
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Reservoir competence of four chaparral-dwelling rodents for Borrelia burgdorferi in California.

机译：加利福尼亚州伯氏疏螺旋体的四种林间类啮齿动物的水库能力。

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摘要

Aspects of the reservoir competence of four rodents for the Lyme disease spirochete, Borrelia burgdorferi, were evaluated in California. Rodents were live-trapped and ear-punch biopsies were cultured during each season. A second set of biopsies was cultured from representative individuals after 2-3 weeks of captivity and the results of culturing biopsies taken on both dates were compared with the results of feeding Ixodes pacificus larvae on hosts xenodiagnostically. The prevalence of infections did not differ significantly between dusky-footed woodrats (Neotoma fuscipes) and California kangaroo rats (Dipodomys californicus) nor among seasons. Combined results of the three tests showed that 85.7% of dusky-footed woodrats (n = 21) and 78.6% of California kangaroo rats (n = 14) were infected with B. burgdorferi. In contrast, only 22.2% of brush mice (Peromyscus boylii) (n = 14) and 7.1% of pinyon mice (P. truei) (n = 9) were infected. The sensitivity of culturing ear-punch biopsies as an assay for borrelial infection was significantly greater when biopsies were taken after a short period of captivity (0.89) rather than on the day of capture (0.52). Tick xenodiagnosis, in which I. pacificus was used as the vector, revealed borrelial infections in 90.3% of infected rodents. Spirochetes were observed in 37.7% of 239, 45.2% of 155, 60.0% of 10, and 7.1% of 14 cultures of nymphal I. pacificus fed as larvae on naturally infected woodrats, kangaroo rats, brush mice, and a pinyon mouse, respectively. The mean prevalence of infection in xenodiagnostic ticks varied significantly among host species with a greater proportion of ticks infected while feeding on woodrats and kangaroo rats than on mice. This study reconfirms previous reports that implicated woodrats and kangaroo rats as reservoirs of B. burgdorferi in California.
机译：在加利福尼亚评估了四种啮齿动物对莱姆病螺旋体伯氏疏螺旋体的储藏能力的方面。在每个季节对啮齿动物进行现场诱捕，并对其进行耳穿孔活检。在被囚禁2-3周后，从有代表性的个体中培养出第二套活检组织，并将这两个日期的活检组织培养结果与异种饲喂寄主寄主的幼虫的结果进行了异种诊断。灰足wood鼠（Neotoma fuscipes）和加利福尼亚袋鼠（Dipodomys californicus）之间或季节之间的感染率没有显着差异。这三项测试的综合结果显示，有85.7％的灰脚wood（n = 21）和78.6％的加利福尼亚袋鼠大鼠（n = 14）感染了B. burgdorferi。相比之下，只有22.2％的毛刷小鼠（Peromyscus boylii）（n = 14）和7.1％的pinyon小鼠（P. truei）（n = 9）被感染。当在短时间内被圈养（0.89）而不是在捕获当天（0.52）进行活检时，培养耳穿孔活检作为对borrelial感染的测定的敏感性明显更高。 ick虫异种诊断（其中使用了I. pacificus作为载体）显示，在感染的啮齿动物中有90.3％发生了伯乐氏菌感染。在天然感染的伍德拉特，袋鼠，毛刷小鼠和松鼠的幼虫中，分别在幼虫喂养的若虫I. pacificus的14种培养物中分别观察到了37.7％的239、75.2％的155、60.0％的10和7.1％ 。在宿主物种中，异种诊断tick的平均感染率差异显着，以wood鼠和袋鼠为食时感染tick的比例要高于小鼠。这项研究证实了先前的报道，即将伍德拉特和袋鼠大鼠作为加利福尼亚州伯氏疏螺旋体的水库。

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