Dataset Information

Wide distribution and genetic diversity of "Candidatus Neoehrlichia mikurensis" in rodents from China.

ABSTRACT: "Candidatus Neoehrlichia mikurensis" was detected by PCR in 4.0% (34/841) of the rodents tested in this study. The 34 rodents represented nine species from seven regions of China. Phylogenetic analyses based on the partial groEL and nearly entire 16S rRNA gene sequences of the agent revealed genetic diversity, which was correlated with its geographic origins.

SUBMITTER: Li H

PROVIDER: S-EPMC3568564 | biostudies-literature | 2013 Feb

REPOSITORIES: biostudies-literature

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Wide distribution and genetic diversity of "Candidatus Neoehrlichia mikurensis" in rodents from China.

Li Hao H Jiang Jiafu J Tang Fang F Sun Yi Y Li Zengde Z Zhang Weilong W Gong Zhengda Z Liu Kun K Yang Hong H Liu Wei W Cao Wuchun W

Applied and environmental microbiology 20121126 3

"Candidatus Neoehrlichia mikurensis" was detected by PCR in 4.0% (34/841) of the rodents tested in this study. The 34 rodents represented nine species from seven regions of China. Phylogenetic analyses based on the partial groEL and nearly entire 16S rRNA gene sequences of the agent revealed genetic diversity, which was correlated with its geographic origins. ...[more]

PMID: 23183973

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Project description:BackgroundCandidatus Neoehrlichia mikurensis (CNM) is an emerging tick-borne pathogen causing severe disease in immunocompromised patients. In Europe, Ixodes ricinus is the primary vector and rodents act as reservoir hosts. New data on the prevalence of CNM in ticks and rodents contribute to the knowledge on the distribution of endemic areas and circulation of the bacterium in natural foci.MethodsQuesting ticks were collected and rodents were trapped in urban/suburban and natural habitats in South-Western Slovakia from 2011 to 2014. DNA from questing and rodent-attached ticks and rodent tissues were screened for CNM by real-time PCR. Rodent spleen samples positive for CNM were characterised at the groEL gene locus. Spatial and temporal differences in CNM prevalence in ticks and rodents and co-infections of ticks with CNM and Anaplasma phagocytophilum were analysed.ResultsThe presence of CNM was confirmed in questing and rodent-attached I. ricinus ticks and in rodents. Total prevalence in both ticks and rodents was significantly higher in the natural habitat (2.3% and 10.1%, respectively) than in the urban/suburban habitat (1.0% and 3.3%, respectively). No seasonal pattern in CNM prevalence in ticks was observed, but prevalence in rodents was higher in autumn than in spring. CNM was detected in Apodemus flavicollis, Myodes glareolus, Microtus arvalis and Micromys minutus, with the highest prevalence in M. arvalis (30%). By screening CNM dissemination in rodent tissues, infection was detected in lungs of all specimens with positive spleens and in blood, kidney, liver and skin of part of those individuals. Infection with CNM was detected in 1.3% of rodent attached I. ricinus ticks. Sequences of a fragment of the groEL gene from CNM-positive rodents showed a high degree of identity with sequences of the gene amplified from ticks and infected human blood from Europe. Only 0.1% of CNM-positive questing ticks carried A. phagocytophilum. Ticks infected with CNM prevailed in the natural habitat (67.2%), whereas ticks infected with A. phagocytophilum prevailed in the urban/suburban habitat (75.0%).ConclusionThe study confirmed the circulation of CNM between I. ricinus ticks and rodents in South-Western Slovakia, and indicates a potential risk of contracting human infections.

Dataset Information

Wide distribution and genetic diversity of "Candidatus Neoehrlichia mikurensis" in rodents from China.

Publications

Wide distribution and genetic diversity of "Candidatus Neoehrlichia mikurensis" in rodents from China.

Similar Datasets

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