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Zhan L.,Chinese Academy of Sciences | Zhan L.,Heihe University | Li S.,Crop Genetics Research Unit | Xu Y.,Chinese Academy of Sciences | And 5 more authors.
Acta Agriculturae Scandinavica Section B: Soil and Plant Science | Year: 2014

Soil fauna is an important component in soil ecosystems. This study tested whether conservation tillage or conventional tillage of a black soil (Udic Mollisol) field in Northeast China could affect its soil fauna communities. Two different conservation tillage systems, no-tillage (NT) and reduced tillage (RT), as well as a conventional rotary tillage system (CT), were chosen for this study. There were 4562 individuals isolated from this study, which included two orders and 35 families. Acariformes was the most abundant family and represented 91.56% of the total faunal abundance. The abundance and the number of faunal families were higher in conservation tillage systems than in the CT. The RT system had the highest individual number of soil fauna among three tillage methods. The faunal accumulation in the soil surface also was significantly higher in the two conservation tillage systems than in the CT. Our results indicate that the conservation tillage systems could protect the soil fauna in the soil ecosystem better than the CT. © 2014 © 2014 Taylor & Francis. Source

Wen J.,Northeast Agricultural University | Jiao D.,Heihe Entry Exit Inspection and Quarantine Bureau | Wang J.-H.,Heihe Entry Exit Inspection and Quarantine Bureau | Yao D.-H.,Heihe Entry Exit Inspection and Quarantine Bureau | And 6 more authors.
Experimental and Applied Acarology | Year: 2014

Since the year 2000, clinical patterns resembling tick-borne rickettsioses have been noticed in China-Russia border areas. Epidemiological data regarding species of the aetiological agent, tick vector prevalence and distribution as well as incidence of human cases in the areas are still sparse to date. In order to identify Rickettsia species occurring in the areas, we investigated Dermacentor silvarum collected in the selected areas. Rickettsia raoultii was the predominant Rickettsia found in D. silvarum evident with ompA, ompB, gltA and 17 kDa protein genes. The Rickettsia prevalence in D. silvarum appeared to be 32.25 % with no sex difference. The results extend the common knowledge about the geographic distribution of R. raoultii and its candidate vector tick species, which suggest an emerged potential threat of human health in the areas. © 2014 Springer International Publishing Switzerland. Source

Cheng C.,Heilongjiang International Travel Healthcare Center | Cheng C.,Beijing Institute of Microbiology and Epidemiology | Fu W.,Heilongjiang International Travel Healthcare Center | Ju W.,Heilongjiang International Travel Healthcare Center | And 10 more authors.
Ticks and Tick-borne Diseases | Year: 2016

In order to investigate the diversity of spotted fever group (SFG) Rickettsia infection in hard ticks, ticks were harvested from the forest areas in Suifenhe city, along the Chinese-Russian border and conventional PCR was carried out using universal SFG Rickettsia primers targeting gltA and ompA genes to screen for their infection with SFG Rickettsia organisms. Results showed that of the 215 ticks belonging to Ixodes persulcatus, Haemaphysalis concinna and Haemaphysalis japonica Warburton, 1908 species, 138 (64.2%) were positive for SFG Rickettsia. Three species of SFG Rickettsia were detected, Rickettsia raoultii, Rickettsia heilongjiangensis and Candidatus Rickettsia tarasevichiae. No co-infection with different species of SFG Rickettsia was found in any individual tick among the three tick species. We detected more than one SFG Rickettsia species in ticks from each of the three tick species with an overlapping distribution and potentially similar transmission cycles of SFG Rickettsia in the areas surveyed. Consequently, different pathogenic rickettsial species may be involved in human cases of rickettsiosis after a bite of the three above-mentioned tick species in that area Rickettsia © 2016. Source

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