scholarly journals Association between guilds of birds in the African-Western Palaearctic region and the tick species Hyalomma rufipes, one of the main vectors of Crimean-Congo haemorrhagic fever virus

One Health ◽  
2021 ◽  
pp. 100349
Author(s):  
Tove Hoffman ◽  
Laura G. Carra ◽  
Patrik Öhagen ◽  
Thord Fransson ◽  
Christos Barboutis ◽  
...  
Keyword(s):  
Tick Species ◽  
Fever Virus ◽  
Palaearctic Region ◽  
Haemorrhagic Fever ◽  
Crimean Congo Haemorrhagic Fever ◽  
Western Palaearctic ◽  
Hyalomma Rufipes

scholarly journals Absence of Crimean-Congo haemorrhagic fever virus in the tick Hyalomma aegyptium parasitizing the spur-thighed tortoise (Testudo graeca) in Tunisia

Parasite ◽  
2019 ◽  
Vol 26 ◽  
pp. 35 ◽  
Author(s):  
Wasfi Fares ◽  
Khalil Dachraoui ◽  
Chawki Najjar ◽  
Hend Younsi ◽  
Stephen Findlay-Wilson ◽  
...  
Keyword(s):  
Tick Species ◽  
Fever Virus ◽  
Haemorrhagic Fever ◽  
Northern Tunisia ◽  
Testudo Graeca ◽  
Infestation Intensity ◽  
Main Host ◽  
Crimean Congo Haemorrhagic Fever ◽  
High Degree ◽  
Free Ranging

Free-ranging spur-thighed tortoises Testudo graeca, captured in different habitat types of Northern Tunisia from March to April 2017, were examined for tick infestation: 134/147 (91%) were infested. The overall infestation intensity and abundance was 8.5 and 7.8, respectively. From these tortoises, 1174 ticks were collected, of which 10% (n = 120) taken from 18 randomly-selected tortoises were identified at the species level; the remaining ticks were examined for the presence of Crimean-Congo haemorrhagic fever virus (CCHFv) by real time RT-PCR. Only adult Hyalomma aegyptium were found, suggesting a high degree of host specificity to tortoises. No CCHFv was detected in ticks. Considering the absence of CCHFv in Hyalomma aegyptium infesting its main host, the spur-thighed tortoise, this tick species is unlikely to play a major role in the epidemiology of CCHF. Therefore, more studies are needed to investigate the circulation of this arbovirus between livestock and other tick species from North Africa.

scholarly journals Adult Hyalomma marginatum tick positive for Rickettsia aeschlimannii in Austria, October 2018

2018 ◽  
Vol 23 (48) ◽  
Author(s):  
Georg Gerhard Duscher ◽  
Adnan Hodžić ◽  
Peter Hufnagl ◽  
Walpurga Wille-Piazzai ◽  
Anna-Magarita Schötta ◽  
...  
Keyword(s):  
Tick Species ◽  
Migratory Birds ◽  
Fever Virus ◽  
Northern Europe ◽  
Haemorrhagic Fever ◽  
Potential Threat ◽  
Hyalomma Marginatum ◽  
Crimean Congo Haemorrhagic Fever ◽  
Rickettsia Aeschlimannii

We report on a non-indigenous adult Hyalomma marginatum tick in Austria carrying the human pathogenic Rickettsia aeschlimannii; presumably introduced as a nymph via migratory birds and completed the moulting within the same year. It was negative for Crimean-Congo haemorrhagic fever virus, but the finding of R. aeschlimannii represents a potential threat for humans due to its zoonotic character. Awareness of invasive tick species and carried pathogens should be improved in central and northern Europe.

scholarly journals Presence of antibodies to Crimean Congo haemorrhagic fever virus in sheep in Tunisia, North Africa

2021 ◽  
Author(s):  
Médiha Khamassi Khbou ◽  
Rihab Romdhane ◽  
Faten Bouaicha Zaafouri ◽  
Mohsen Bouajila ◽  
Limam Sassi ◽  
...  
Keyword(s):  
North Africa ◽  
Fever Virus ◽  
Haemorrhagic Fever ◽  
Crimean Congo Haemorrhagic Fever

scholarly journals Next-generation sequencing of southern African Crimean-Congo haemorrhagic fever virus isolates reveals a high frequency of M segment reassortment

2014 ◽  
Vol 142 (9) ◽  
pp. 1952-1962 ◽  
Author(s):  
D. GOEDHALS ◽  
P. A. BESTER ◽  
J. T. PAWESKA ◽  
R. SWANEPOEL ◽  
F. J. BURT
Keyword(s):  
Next Generation Sequencing ◽  
High Frequency ◽  
Complete Genome ◽  
Fever Virus ◽  
Likelihood Method ◽  
Haemorrhagic Fever ◽  
Next Generation ◽  
Genome Sequences ◽  
Crimean Congo Haemorrhagic Fever ◽  
Generation Sequencing

SUMMARYCrimean Congo haemorrhagic fever virus (CCHFV) is a bunyavirus with a single-stranded RNA genome consisting of three segments (S, M, L), coding for the nucleocapsid protein, envelope glycoproteins and RNA polymerase, respectively. To date only five complete genome sequences are available from southern African isolates. Complete genome sequences were generated for 10 southern African CCHFV isolates using next-generation sequencing techniques. The maximum-likelihood method was used to generate tree topologies for 15 southern African plus 26 geographically distinct complete sequences from GenBank. M segment reassortment was identified in 10/15 southern African isolates by incongruencies in grouping compared to the S and L segments. These reassortant M segments cluster with isolates from Asia/Middle East, while the S and L segments cluster with strains from South/West Africa. The CCHFV M segment shows a high level of genetic diversity, while the S and L segments appear to co-evolve. The reason for the high frequency of M segment reassortment is not known. It has previously been suggested that M segment reassortment results in a virus with high fitness but a clear role in increased pathogenicity has yet to be shown.

Factors driving the circulation and possible expansion of Crimean-Congo haemorrhagic fever virus in the western Palearctic

2012 ◽  
Vol 114 (1) ◽  
pp. 278-286 ◽  
Author(s):  
A. Estrada-Peña ◽  
F. Ruiz-Fons ◽  
P. Acevedo ◽  
C. Gortazar ◽  
J. de la Fuente
Keyword(s):  
Fever Virus ◽  
Haemorrhagic Fever ◽  
Western Palearctic ◽  
Crimean Congo Haemorrhagic Fever

Host-passage-induced phenotypic changes in Crimean-Congo haemorrhagic fever virus

1995 ◽  
Vol 146 (2) ◽  
pp. 131-140 ◽  
Author(s):  
J.P. Gonzalez ◽  
M.L. Wilson ◽  
J.R Cornet ◽  
J.L. Camicas
Keyword(s):  
Fever Virus ◽  
Haemorrhagic Fever ◽  
Phenotypic Changes ◽  
Crimean Congo Haemorrhagic Fever
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