Rickettsia gravesii sp. nov.: a novel spotted fever group rickettsia in Western Australian Amblyomma triguttatum triguttatum ticks

M.Y. Abdad; R.A. Abdallah; K.E. Karkouri; M. Beye; J. Stenos; H. Owen; N. Unsworth; I. Robertson; S.D. Blacksell; T-T Nguyen; C. Nappez; D. Raoult; S. Fenwick; P-E Fournier

doi:10.1099/ijsem.0.001865

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Rickettsia gravesii sp. nov.: a novel spotted fever group rickettsia in Western Australian Amblyomma triguttatum triguttatum ticks

Journal article

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Rickettsia gravesii sp. nov.: a novel spotted fever group rickettsia in Western Australian Amblyomma triguttatum triguttatum ticks

M.Y. Abdad, R.A. Abdallah, K.E. Karkouri, M. Beye, J. Stenos, H. Owen, N. Unsworth, I. Robertson, S.D. Blacksell, T-T Nguyen, …

International Journal of Systematic and Evolutionary Microbiology, Vol.67(9), pp.3156-3161

2017

DOI: https://doi.org/10.1099/ijsem.0.001865

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Abstract

A rickettsial organism harboured by Amblyomma triguttatum ticks on Barrow Island, Western Australia, was discovered after reports of possible rickettsiosis among local workers. Subsequent isolation of this rickettsia (strain BWI-1) in cell culture and analysis of its phylogenetic, genotypic and phenotypic relationships with type strains of Rickettsia species with standing in nomenclature suggested that it was sufficiently divergent to warrant its classification as a new species. Multiple gene comparison of strain BWI-1 revealed degrees of sequence similarity with Rickettsia raoultii, its closest relative, of 99.58, 98.89, 97.03, 96.93 and 95.73% for the 16S rRNA, citrate synthase, ompA, ompB and sca4 genes, respectively. Serotyping in mice also demonstrated that strain BWI-1T was distinct from Rickettsia raoultii. Thus, we propose the naming of a new species, Rickettsia gravesii sp. nov., based on its novel genotypic and phenotypic characteristics. Strain BWI-1T was deposited in the ATCC, CSUR and ARRL collections under reference numbers VR-1664, CSUR R172 and RGBWI-1, respectively.

Details

Title: Rickettsia gravesii sp. nov.: a novel spotted fever group rickettsia in Western Australian Amblyomma triguttatum triguttatum ticks
Authors/Creators: M.Y. Abdad (Author/Creator) - Geelong Hospital
R.A. Abdallah (Author/Creator) - Aix-Marseille Université
K.E. Karkouri (Author/Creator)
M. Beye (Author/Creator) - Aix-Marseille Université
J. Stenos (Author/Creator) - Geelong Hospital
H. Owen (Author/Creator) - Murdoch University
N. Unsworth (Author/Creator) - Geelong Hospital
I. Robertson (Author/Creator) - Murdoch University
S.D. Blacksell (Author/Creator) - Churchill Hospital
T-T Nguyen (Author/Creator) - Aix-Marseille Université
C. Nappez (Author/Creator) - Aix-Marseille Université
D. Raoult (Author/Creator) - Aix-Marseille Université
S. Fenwick (Author/Creator) - Murdoch University
P-E Fournier (Author/Creator) - Aix-Marseille Université
Publication Details: International Journal of Systematic and Evolutionary Microbiology, Vol.67(9), pp.3156-3161
Publisher: Society for General Microbiology
Identifiers: 991005541659407891
Copyright: © 2017 IUMS.
Murdoch Affiliation: School of Veterinary and Life Sciences
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 1 Clinical & Life Sciences; 1.258 Zoonotic Diseases; 1.258.227 Tick-borne Pathogens
Web Of Science research areas: Microbiology
ESI research areas: Microbiology