Tick species from cattle in the Adama Region of Ethiopia and pathogens detected

Tufa, Tafese Beyene; Wölfel, Silke; Zubríková, Dana; Víchová, Bronislava; Andersson, Martin; Rieß, Ramona; Rutaihwa, Liliana K.; Fuchs, André; Orth, Hans Martin; Häussinger, Dieter; Feldt, Torsten; Poppert, Sven; Dobler, Gerhard; Bakkes, Deon K.; Chiţimia-Dobler, Lidia

doi:10.1007/s10493-021-00623-5

Cited by 7 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These include Ehrlichia ruminantium (the agent of heartwater), Theileria mutans , and Rickettsia africae (the agent of African tick-bite fever) [ 46 ]. There are many reports about A. variegatum carrying R. africae from different African countries such as Sudan [ 47 , 48 ] and Ethiopia [ 49 ]. In the present study, R. africae was detected in A. compressum , A. variegatum , and A. flavomaculatum and was sequenced from 61 tests (92.4% of the 66 sequenced samples).…”

Section: Discussionmentioning

confidence: 99%

Ticks and Rickettsiae Associated with Wild Animals Sold in Bush Meat Markets in Cameroon

et al. 2023

Self Cite

View full text Add to dashboard Cite

Ticks are obligate blood-sucking parasites of wild animals and transmit many zoonotic microorganisms that can spread to domesticated animals and then to humans. In Cameroon, little is known about tick diversity among wildlife, especially for animals which are hunted for human consumption. Therefore, this survey was undertaken to investigate tick and Rickettsia species diversity parasitizing the wild animals sold in bush meat markets in Cameroon. In total, 686 ticks were collected and identified to the species level based on morphology, and some were genetically analyzed using the 16S rRNA gene. Eighteen tick species belonging to five genera were identified: Amblyomma spp. (Amblyomma compressum, Amblyomma flavomaculatum, and Amblyomma variegatum), Haemaphysalis spp. (Haemaphysalis camicasi, Haemaphysalis houyi, Haemaphysalis leachi, and Haemaphysalis parmata), Hyalomma spp. (Hyalomma nitidum, Hyalomma rufipes, and Hyalomma truncatum), Ixodes spp. (Ixodes rasus and Ixodes moreli), and Rhipicephalus spp. (Rhipicephalus guilhoni, Rhipicephalus moucheti, Rhipicephalus muhsamae, Rhipicephalus microplus, Rhipicephalus camicasi, and Rhipicephalus linnaei). In terms of Rickettsia important for public health, two Rickettsia spp., namely Rickettsia aeschlimannii and Rickettsia africae, were detected in Hyalomma spp. and Amblyomma spp., respectively. Distinct tick–pathogen patterns were present for divergent sequences of R. africae associated with exclusively A. variegatum vectors (type strain) versus vectors comprising A. compressum, A. flavomaculatum, and A. variegatum. This suggests possible effects of vector species population dynamics on pathogen population circulation dynamics. Furthermore, Candidatus Rickettsia africaustralis was detected for the first time in Cameroon in I. rasus. This study highlights the high diversity of ticks among wildlife sold in bush meat markets in Cameroon.

show abstract

Section: Discussionmentioning

confidence: 99%

Ticks and Rickettsiae Associated with Wild Animals Sold in Bush Meat Markets in Cameroon

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…An unclassified Anaplasma sp. was detected in 0.5% of Amblyomma cohaerens sampled from cattle in Adama, Ethiopia using 16S rRNA gene PCR [ 147 ]. Another unclassified Anaplasma sp.…”

Section: Molecular Epidemiology and Genetic Diversity Of An...mentioning

confidence: 99%

Anaplasma Species in Africa—A Century of Discovery: A Review on Molecular Epidemiology, Genetic Diversity, and Control

Kolo

2023

Pathogens

View full text Add to dashboard Cite

Anaplasma species, belonging to the family Anaplasmataceae in the order Rickettsiales, are obligate intracellular bacteria responsible for various tick-borne diseases of veterinary and human significance worldwide. With advancements in molecular techniques, seven formal species of Anaplasma and numerous unclassified species have been described. In Africa, several Anaplasma species and strains have been identified in different animals and tick species. This review aims to provide an overview of the current understanding of the molecular epidemiology and genetic diversity of classified and unclassified Anaplasma species detected in animals and ticks across Africa. The review also covers control measures that have been taken to prevent anaplasmosis transmission on the continent. This information is critical when developing anaplasmosis management and control programs in Africa.

show abstract

“…cohaerens may play a role in maintaining the natural transmission cycle of R. africae in areas with low prevalence of Am. variegatum (38).…”

Section: Ixodidae (Hard Ticks) Amblyommamentioning

confidence: 99%

Unraveling the epidemiological relationship between ticks and rickettsial infection in Africa

Onyiche

Labruna²,

Saito³

2022

Front. Trop. Dis

View full text Add to dashboard Cite

Tick-borne rickettsioses are emerging and re-emerging diseases of public health concern caused by over 30 species of Rickettsia. Ticks are obligate hematophagous arthropods with over 700 species of Ixodid ticks known worldwide. The escalating geographical dispersal of tick vectors and concomitant increase in the incidences of tick-borne diseases have fueled interest in the ecology of tick-borne pathogens. This review focuses on aspects of the Rickettsia pathogen, including biology, taxonomy, phylogeny, genetic diversity, epidemiology of the disease, and the role of vertebrate host in the perpetuation of rickettsioses in Africa. Our review also highlights some of the species of Rickettsia that are responsible for disease, the role of tick vectors (both hard and soft ticks) and the species of Rickettsia associated with diverse tick species across the continent. Additionally, this article emphasizes the evolutionary perspective of rickettsiae perpetuation and the possible role of amplifying vertebrate host and other small mammals, domestic animals and wildlife in the epidemiology of Rickettsia species. We also specifically, discussed the role of avian population in the epidemiology of SFG rickettsiae. Furthermore, we highlighted tick-borne rickettsioses among travelers due to African tick-bite fever (ATBF) and the challenges to surveillance of rickettsial infection, and research on rickettsiology in Africa. Our review canvasses the need for more rickettsiologists of African origin based within the continent to further research towards understanding the biology, characterization, and species distribution, including the competent tick vectors involved in their transmission of rickettsiae across the continent in collaboration with established researchers in western countries. We further highlighted the need for proper funding to encourage research despite competing demands for resources across the various sectors. We finalize by discussing the similarities between rickettsial diseases around the world and which steps need to be taken to help foster our understanding on the eco-epidemiology of rickettsioses by bridging the gap between the growing epidemiological data and the molecular characterization of Rickettsia species.

show abstract

Tick species from cattle in the Adama Region of Ethiopia and pathogens detected

Cited by 7 publications

References 42 publications

Ticks and Rickettsiae Associated with Wild Animals Sold in Bush Meat Markets in Cameroon

Ticks and Rickettsiae Associated with Wild Animals Sold in Bush Meat Markets in Cameroon

Anaplasma Species in Africa—A Century of Discovery: A Review on Molecular Epidemiology, Genetic Diversity, and Control

Unraveling the epidemiological relationship between ticks and rickettsial infection in Africa

Contact Info

Product

Resources

About