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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Detection of "Rickettsia sp strain Uilenbergi" and "Rickettsia sp strain Davousti" in Amblyomma tholloni ticks from elephants in Africa
Author(s): Matsumoto, Kotaro
Parola, Philippe
Rolain, Jean-Marc
Jeffery, Kathryn Jane
Raoult, Didier
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Issue Date: 7-Aug-2007
Date Deposited: 27-Mar-2014
Citation: Matsumoto K, Parola P, Rolain J, Jeffery KJ & Raoult D (2007) Detection of "Rickettsia sp strain Uilenbergi" and "Rickettsia sp strain Davousti" in Amblyomma tholloni ticks from elephants in Africa. BMC Microbiology, 7, Art. No.: 74.
Abstract: Background: To date, 6 tick-borne rickettsiae pathogenic for humans are known to occur in Africa and 4 of them were first identified in ticks before being recognized as human pathogens. Results: We examined 33 and 5 Amblyomma tholloni ticks from African elephants in the Central African Republic and Gabon, respectively, by PCR amplification and sequencing of a part of gltA and ompA genes of the genus Rickettsia. The partial sequences of gltA and ompA genes detected in tick in Gabon had 99.1% similarity with those of R. heilongjiangensis and 97.1% with those of Rickettsia sp. HL-93 strain, respectively. The partial gltA and ompA gene sequences detected in tick in the Central African Republic were 98.9% and 95.1% similar to those of Rickettsia sp. DnS14 strain and R. massiliae, respectively. Phylogenetic analysis showed Rickettsia sp. detected in Gabon clusters with R. japonica and R. heilongjiangensis in a phylogenetic tree based on the partial gltA and ompA genes. The genotype of the Rickettsia sp. detected in the Central African Republic is close to those of R. massiliae group in the phylogenetic tree based on partial gltA gene sequences, and distantly related to other rickettsiae in the tree based on partial ompA gene. Conclusion: The degrees of similarity of partial gltA and ompA genes with recognized species indicate the rickettsiae detected in this study may be new species although we could only study the partial sequences of 2 genes regarding the amount of DNA that was available. We propose the Rickettsia sp. detected in Gabon be provisionally named "Rickettsia sp. stain Davousti" and Rickettsia sp. detected in the Central African Republic be named "Rickettsia sp. strain Uilenbergi".
DOI Link: 10.1186/1471-2180-7-74
Rights: © 2007 Matsumoto et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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