Identification of intestinal bacterial flora in Rhipicephalus microplus ticks by conventional methods and PCR-DGGE analysis

Experimental & Applied Acarology
Xing-Li XuFen Yan

Abstract

In this study, we have analyzed the intestinal microbial flora associated with Rhipicephalus microplus ticks using both culture-dependent and independent methods based on PCR and denaturing gradient gel electrophoresis (PCR-DGGE). The R. microplus ticks were collected from cattle and goats in Jiangxi, Hunan and Guizhou Provinces of China. Three distinct strains of bacteria were isolated using culture-dependent methods: Staphylococcus simulans, Bacillus subtilis and Bacillus flexus strain. Nineteen distinct DGGE bands were found using PCR-DGGE analysis, and their search for identity shows that they belonged to Rickettsiaceae, Xanthomonadaceae, Coxiella sp., Ehrlichia sp., Pseudomonas sp., Ehrlichia sp., Orphnebius sp., Rickettsia peacockii, Bacillus flexus. Rickettsia peacockii and Coxiella genus were the dominant strain of the R. microplus ticks from cattle, Pseudomonas sp. and B. flexus strain were the most common species in all tick samples from goats. Ehrlichia canis were detected only in R. microplus ticks from Yongshun area in Hunan Province. The results indicate that the intestinal microbial diversity of R. microplus ticks was influenced by tick hosts and local differences in the sampling location and these two aspects ma...Continue Reading

References

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