New host record and redescription of Amblyomma cordiferum nymphs and larvae infesting Malaysian house rats (Rattus rattus diardii) in Peninsular Malaysia, with molecular evidence of Rickettsia, Borrelia, and Bartonella

IF 2.1 3区医学 Q2 PARASITOLOGY

Acta tropica Pub Date : 2025-01-01 DOI:10.1016/j.actatropica.2024.107496

Abdul Rahman Kazim , Dzulhelmi Muhammad Nasir , Tiong Kai Tan , Vinnie-Siow Wei Yin , Ariff Ateed Mohd Noh , Chong-Chin Heo , Van Lun Low

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Abstract

Nymphal and larval Amblyomma cordiferum ticks, a relatively rare species, were collected from the Malaysian house rat (Rattus rattus diardii) in Peninsular Malaysia. Redescription and molecular analysis of nymphs and larvae, based on the 12S rRNA, 16S rRNA, and COI genes, revealed divergence from A. cordiferum in Taiwan, suggesting that the Taiwanese tick specimens may represent a different taxon. Molecular analysis of the pathogens in these specimens revealed three sequences of Rickettsia closely related or identical to Rickettsia raoultii (99.71–100%), two sequences of relapsing fever Borrelia identical to Borrelia theileri, and four sequences of Bartonella identical to Bartonella phoceensis. This study also identifies a new host record for A. cordiferum in R. r. diardii and reports the first detection of Rickettsia, Borrelia, and Bartonella in this tick species.

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马来西亚半岛马来西亚家鼠（Rattus Rattus diardii）感染的cordiblyomma amblyomum若虫和幼虫的新寄主记录和重新描述，并附有立克次体、疏螺旋体和巴尔通体的分子证据。

在马来西亚半岛，从马来西亚家鼠（Rattus Rattus diardii）身上采集到一种较为罕见的蜱虫。利用12S rRNA、16S rRNA和COI基因对台湾蜱虫若虫和幼虫进行重新描述和分子分析，发现台湾蜱虫与台湾a . cordiferum存在差异，表明台湾蜱虫可能属于不同的分类群。病原分子分析显示，3个立克次体序列与拉乌尔立克次体密切相关或相同（99.71 ~ 100%），2个回归热伯氏疏螺旋体序列与他们的伯氏疏螺旋体相同，4个巴尔通体序列与phoceensis巴尔通体相同。本研究还在地鼠中发现了一种新的寄主记录，并报道了首次在地鼠中检测到立克次体、伯氏疏螺旋体和巴尔通体。

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来源期刊

Acta tropica 医学-寄生虫学

CiteScore

5.40

自引率

11.10%

发文量

383

审稿时长

37 days

期刊介绍： Acta Tropica, is an international journal on infectious diseases that covers public health sciences and biomedical research with particular emphasis on topics relevant to human and animal health in the tropics and the subtropics.