First detection of Amblyomma variegatum and molecular finding of Rickettsia africae in Sardinia, Italy

2021 ◽  
Vol 12 (1) ◽  
pp. 101561 ◽  
Author(s):  
Elisabetta Pintore ◽  
Emanuela Olivieri ◽  
Anna Maria Floriano ◽  
Davide Sassera ◽  
Nino Sanna ◽  
...  
Keyword(s):  
Amblyomma Variegatum ◽  
Rickettsia Africae

scholarly journals Rickettsia africae: identifying gaps in the current knowledge on vector-pathogen-host interactions

2021 ◽  
Vol 15 (08) ◽  
pp. 1039-1047
Author(s):  
Estere Mazhetese ◽  
Vlademiro Magaia ◽  
Elisa Taviani ◽  
Luis Neves ◽  
Darshana Morar-Leather
Keyword(s):  
Southern Africa ◽  
Tick Species ◽  
Current Knowledge ◽  
Clinical Signs ◽  
Amblyomma Variegatum ◽  
Amblyomma Hebraeum ◽  
Host Interactions ◽  
Rickettsia Africae ◽  
African Tick Bite Fever ◽  
Tick Bite Fever

Rickettsia africae is a bacterium of zoonotic importance, which causes African tick bite fever (ATBF) in humans. This pathogen is transmitted by ticks of the genus Amblyomma, with Amblyomma hebraeum and Amblyomma variegatum being the major vectors. Tick species other than the above-mentioned have also been reported to carry R. africae DNA. There is scarcity of information on the epidemiology of this pathogen, yet several cases have been recorded in foreign travellers who visited endemic areas, especially southern Africa. The disease has rarely been described in people from endemic regions. The aim of this study was to discuss the information that is currently available on the epidemiology of R. africae, highlighting the gaps in this field. Furthermore, ATBF cases, clinical signs and the locations where the cases occurred are also listed in this review.

scholarly journals New Approaches to Detection and Identification of Rickettsia africae and Ehrlichia ruminantium in Amblyomma variegatum (Acari: Ixodidae) Ticks From the Caribbean

2009 ◽  
Vol 46 (4) ◽  
pp. 942-951 ◽  
Author(s):  
Jennilee B. Robinson ◽  
Marina E. Eremeeva ◽  
Patrick E. Olson ◽  
Scott A. Thornton ◽  
Michael J. Medina ◽  
...  
Keyword(s):  
Amblyomma Variegatum ◽  
Ehrlichia Ruminantium ◽  
New Approaches ◽  
Rickettsia Africae ◽  
Detection And Identification ◽  
The Caribbean

Rickettsia africae in Amblyomma variegatum and Domestic Ruminants on Eight Caribbean Islands

2010 ◽  
Vol 96 (6) ◽  
pp. 1086-1088 ◽  
Author(s):  
Patrick Kelly ◽  
Helene Lucas ◽  
Lorenza Beati ◽  
Charles Yowell ◽  
Suman Mahan ◽  
...  
Keyword(s):  
Amblyomma Variegatum ◽  
Caribbean Islands ◽  
Rickettsia Africae ◽  
Domestic Ruminants

High detection rate of Rickettsia africae in Amblyomma variegatum but low prevalence of anti-rickettsial antibodies in healthy pregnant women in Madagascar

2016 ◽  
Vol 7 (1) ◽  
pp. 60-65 ◽  
Author(s):  
Christian Keller ◽  
Andreas Krüger ◽  
Norbert Georg Schwarz ◽  
Raphael Rakotozandrindrainy ◽  
Jean Philibert Rakotondrainiarivelo ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Detection Rate ◽  
Amblyomma Variegatum ◽  
High Detection Rate ◽  
Rickettsia Africae ◽  
High Detection ◽  
Low Prevalence

scholarly journals First molecular detection of Rickettsia africae in a tropical bont tick, Amblyomma variegatum, collected in Corsica, France

2019 ◽  
Vol 77 (2) ◽  
pp. 207-214 ◽  
Author(s):  
Vincent Cicculli ◽  
Xavier de Lamballerie ◽  
Remi Charrel ◽  
Alessandra Falchi
Keyword(s):  
Molecular Detection ◽  
Amblyomma Variegatum ◽  
Rickettsia Africae

Exemplar Abstract for Rickettsia africae Kelly et al. 1996.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Dorothea Taylor ◽  
George M Garrity
Keyword(s):  
Rickettsia Africae

scholarly journals Efficacy of two commercial synthetic pyrethroids (cypermethrin and deltamethrin) on Amblyomma variegatum and Rhipicephalus microplus strains of the south-western region of Burkina Faso

2021 ◽  
Vol 53 (3) ◽  
Author(s):  
Achille S. Ouedraogo ◽  
Olivier M. Zannou ◽  
Abel S. Biguezoton ◽  
Kouassi Yao Patrick ◽  
Adrien M. G. Belem ◽  
...  
Keyword(s):  
Burkina Faso ◽  
Pyrethroid Resistance ◽  
Tick Control ◽  
Rhipicephalus Microplus ◽  
Amblyomma Variegatum ◽  
Synthetic Pyrethroid ◽  
Cattle Tick ◽  
Control Problems ◽  
Synthetic Pyrethroids ◽  
Western Region

AbstractSince 2011, period of the livestock invasion by the cattle tick Rhipicephalus microplus in Burkina Faso (BF), tick-control problems were exacerbated. Based on farmer’s reports, most commonly used commercial acaricides were found to be ineffective in Western South part of the country. To investigate the occurrence and extent of such acaricidal ineffectiveness, we performed the standardized larval packet test (LPT) with commercial deltamethrin (vectocid) and cypermethrin (cypertop), on two cattle tick species, the native Amblyomma variegatum and the invasive R. microplus. The resistance ratios (RR) were computed with susceptible Hounde strain of Rhipicephalus geigyi as reference. The R. microplus population showed resistance to the two acaricides tested with the highest lethal concentration (LC) values, and different resistance ratios higher than 4 (deltamethrin: RR50 = 28.18 and RR90 = 32.41; cypermethrin: RR50 = 8.79 and RR90 = 23.15). In the contrary, A. variegatum population was found to be highly susceptible to acaricides tested with low lethal concentrations and resistance ratio values (deltamethrin: RR50 = 0.5 and RR90 = 0.48; cypermethrin: RR50 = 0.68 and RR90 = 0.79). These data demonstrate high synthetic pyrethroid resistance in R. microplus strain, leading to conclude that the acaricide ineffectiveness in tick populations control remains a concern in BF.

Abnormal Development of Amblyomma variegatum (Acarina: Ixodidae)

1988 ◽  
Vol 25 (2) ◽  
pp. 142-143 ◽  
Author(s):  
A. A. Latif ◽  
T. S. Dhadialla ◽  
R. M. Newson
Keyword(s):  
Amblyomma Variegatum ◽  
Abnormal Development
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