Siy Patricia N, Larson Ryan T, Zembsch Tela E, Lee Xia, Paskewitz Susan M
Department of Entomology, College of Agriculture and Life Sciences, University of Wisconsin - Madison, 1630 Linden Drive, Madison, WI 53706, USA.
J Med Entomol. 2021 Nov 9;58(6):2504-2507. doi: 10.1093/jme/tjab102.
Borrelia mayonii is a recently discovered bacterial spirochete that causes Lyme disease and is transmitted by the blacklegged tick, Ixodes scapularis Say (Acari: Ixodidae). To date, B. mayonii has been isolated from two vertebrate host species in Minnesota: field-caught white-footed mice (Peromyscus leucopus Rafinesque; Rodentia: Cricetidae) and American red squirrel (Tamiasciurus hudsonicus Erxleben). Here, we describe the first detection of B. mayonii in field-caught eastern chipmunks (Tamias striatus L. (Rodentia: Cricetidae)) from northern Wisconsin. During our study, we captured 530 unique small mammals and found an infection prevalence of 23.50% in field-caught eastern chipmunks (4/17) and 1.19% in Peromyscus spp. (5/420). Mean larval and nymphal burdens were determined for captured Blarina brevicauda (0, 0), Glaucomys volans (0.29, 0.14), Myodes gapperi (0.27, 0), Napaeozapus insignis (0, 0.25), Peromyscus spp. (1.88, 0.11), T. striatus (1.06, 0.65), and Sorex cinereus (0.09, 0). The high B. mayonii infection prevalence in eastern chipmunks suggests that the species may be an important reservoir for B. mayonii in the Upper Midwest.
马约尼疏螺旋体是一种最近发现的能引起莱姆病的螺旋体细菌，由肩突硬蜱（Ixodes scapularis Say，蜱螨目：硬蜱科）传播。迄今为止，马约尼疏螺旋体已从明尼苏达州的两种脊椎动物宿主中分离出来：野外捕获的白足鼠（Peromyscus leucopus Rafinesque；啮齿目：仓鼠科）和美洲红松鼠（Tamiasciurus hudsonicus Erxleben）。在此，我们描述了在威斯康星州北部野外捕获的东部花栗鼠（Tamias striatus L.（啮齿目：仓鼠科））中首次检测到马约尼疏螺旋体。在我们的研究中，我们捕获了530只不同的小型哺乳动物，发现野外捕获的东部花栗鼠（4/17）的感染率为23.50%，而白足鼠属（5/420）的感染率为1.19%。测定了捕获的短尾鼩鼱（Blarina brevicauda）（0，0）、小飞鼠（Glaucomys volans）（0.29，0.14）、北美林鼠（Myodes gapperi）（0.27，0）、无斑林跳鼠（Napaeozapus insignis）（0，0.25）、白足鼠属（1.88，0.11）、东部花栗鼠（1.06，0.65）和灰鼩鼱（Sorex cinereus）（0.09，0）的幼虫和若虫平均负荷。东部花栗鼠中马约尼疏螺旋体的高感染率表明该物种可能是中西部上游地区马约尼疏螺旋体的重要宿主。
