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The Occurrence of Physaloptera hispida and a Mastophorus Sp. in Pulmonary Vessels of Hispid Cotton Rats (Sigmodon hispidus) from Georgia, U.S.A.
Journal of Parasitology ( IF 1.3 ) Pub Date : 2019-10-01
Alec T Thompson 1 , Christopher A Cleveland 1, 2 , Troy M Koser 1, 2 , Seth T Wyckoff 1 , Michael J Yabsley 1, 2
Affiliation  

During 2017-2018, a survey for the rat lungworm, Angiostrongylus cantonensis (Nematoda: Metastrongyloidea), in rodents from Piedmont and Lower Coastal Plains physiographic regions of Georgia was conducted. On 4 occasions, a single worm was recovered from the pulmonary vessels of a single cotton rat (Sigmodon hispidis). One of these worms was identified as a Physaloptera sp. and the remaining 3 as a Mastophorus sp. by morphology. No A. cantonensis were found. Physaloptera (Nematoda: Physalopteroidea) and Mastophorus species (Nematoda: Spiruroidea) are stomach parasites of many wild and domestic animals. This is the first report of these species in the pulmonary vessels of a definitive host. To better characterize these parasites, representative specimens were collected from cotton rat stomachs and identified morphologically and molecularly. Based on partial cytochrome c oxidase subunit 1 (COI) gene sequences, Physaloptera hispida from stomachs were identical to the Physaloptera sp. from the pulmonary vessels. The COI sequences from the Mastophorus sp. from the stomach exhibited a higher degree of variability but confirmed that the pulmonary worms were the same Mastophorus species. Furthermore, sequences of Mastophorus from a coastal site clustered separately from a clade of Mastophorus sequences from cotton rats from a Piedmont site. Our data show that adult worms recovered from pulmonary vessels of cotton rats could be either Physaloptera or Mastophorus sp., indicating that these parasitic worms are not always restricted to the stomach and that worms from pulmonary vessels must be carefully examined to obtain a definitive diagnosis of A. cantonensis infection.

中文翻译:

Physaloptera hispida 和 Mastophorus Sp 的发生。来自美国乔治亚州的棉鼠 (Sigmodon hispidus) 的肺血管中

在 2017-2018 年期间,对来自格鲁吉亚皮埃蒙特和下沿海平原自然地理区域的啮齿动物中的鼠肺虫广州管圆线虫(线虫:Metastrongyloidea)进行了调查。有 4 次,从单只棉鼠 (Sigmodon hispidis) 的肺血管中发现了一条蠕虫。其中一种蠕虫被鉴定为 Physaloptera sp。其余 3 个为 Mastophorus sp。通过形态学。没有发现 A. cantonensis。Physaloptera (Nematoda: Physalopteroidea) 和 Mastophorus (Nematoda: Spiruroidea) 是许多野生和家养动物的胃寄生虫。这是这些物种在最终宿主肺血管中的首次报道。为了更好地表征这些寄生虫,从棉鼠胃中采集了代表性标本,并从形态学和分子学上进行了鉴定。基于部分细胞色素 c 氧化酶亚基 1 (COI) 基因序列,来自胃的 Physaloptera hispida 与 Physaloptera sp。从肺血管。来自Mastophorus sp的COI序列。来自胃的蠕虫表现出更高程度的变异性,但证实了肺蠕虫是相​​同的Mastophorus物种。此外,来自沿海地区的Mastophorus 序列与来自皮埃蒙特地区的棉鼠的Mastophorus 序列进化枝分开聚集。我们的数据表明,从棉鼠肺血管中回收的成虫可能是 Physaloptera 或 Mastophorus sp.,这表明这些寄生虫并不总是局限于胃部,必须仔细检查来自肺血管的蠕虫以获得明确的诊断A. cantonensis 感染。
更新日期:2019-11-01
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