Improving specific detection and updating phylogenetic data related to Anaplasma platys-like strains infecting camels (Camelus dromedarius) and their ticks

Selmi, Rachid; Saïd, Mourad Ben; Dhibi, Mokhtar; Yahia, Houcine Ben; Messadi, Lilia

doi:10.1016/j.ttbdis.2019.07.004

Cited by 31 publications

(28 citation statements)

References 47 publications

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“…ticks (Sanogo et al, 2003). Strains which are genetically close to A. platys have already been reported in cattle and small rumi-nants (Ben Said et al, 2017 and in camels (Belkahia et al, 2015;Selmi et al, 2019) from Tunisia. Further analyses are needed, to know whether it is specifically A. platys or genetically-related strains.…”

Section: Discussionmentioning

confidence: 87%

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Molecular identification of protozoal and bacterial organisms in domestic animals and their infesting ticks from north-eastern Algeria

Sadeddine

Diarra

Laroche

et al. 2020

Ticks and Tick-borne Diseases

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A molecular survey was undertaken to determine the presence of protozoal and bacterial organisms in 120 ticks and 87 blood samples collected from mammals in northeastern Algeria. Eight tick species were morphologically identified including 70 Rhipicephalus (Boophilus) annulatus,23 Rhipicephalus bursa, five Rhipicephalus sanguineus sensu lato, 11 Hyalomma impeltatum, five Hyalomma scupense, two Hyalommma marginatum, one Hyalomma anatolicum and three Ixodes ricinus. Quantitative PCR screening of the ticks showed that Theileria annulata, "Candidatus Ehrlichia urmitei", Theileria buffeli and Anaplasma platys were detected in Rh. annulatus. Rickettsia massiliae and Anaplasma ovis were detected in Rh. sanguineus s.l. and Rh. bursa. Rickettsia aeschlimannii was detected in Hy. marginatum, Hy. scupense and Hy. impeltatum. Finally, "Candidatus Rickettsia barbariae" was detected in Rh. bursa. In the screening blood samples, Theileria equi, T.annulata, T. buffeli, Babesia bovis, Anaplasma marginale, A. ovis and Borrelia spp. were detected in cattle. Theileria ovis, T. annulata, and A. ovis were detected in sheep. In addition, A. ovis and T. equi were detected in goats and equidea respectively. In this study, T. equi and "Candidatus Rickettsia barbariae" were identified for the first time in Algeria as well as potential new species of Ehrlichia and Anaplasma. Although molecular detection does not indicate vector/reservoir competence when investigating ticks removed from animals, this study expands the knowledge of the microorganisms detected in ticks in northeast of Algeria.

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Section: Discussionmentioning

confidence: 87%

“…The spirochaete B. theileri, the causative agent of bovine borreliosis in cattle, associated with fever and anaemia (Smith et al, 1985), was detected in two cattle blood samples. In Algeria, this species has been reported in blood from sheep and goats (Aouadi et al, 2017), but no studies have thus far indicated its presence in Algerian cattle.…”

Section: Resultsmentioning

confidence: 99%

Molecular identification of protozoal and bacterial organisms in domestic animals and their infesting ticks from north-eastern Algeria

Sadeddine

Diarra

Laroche

et al. 2020

Ticks and Tick-borne Diseases

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“…The most prevalent tick species identified was H. dromedarii, which is considered as the main species parasitizing dromedary camels [10,11]. Hyalomma dromedarii is a thermophilic tick usually found in arid and hyper-arid regions [46] with the high prevalence reported from camels in Sudan, Iran, Egypt, Saudi Arabia and Tunisia, with an infection rate ranging between 49-89% [10,[46][47][48][49] although it can also infest sheep, goats and horses [50]. This tick species is the principal vector of Theileria spp.…”

Section: Discussionmentioning

confidence: 99%

Ticks and associated pathogens in camels (Camelus dromedarius) from Riyadh Province, Saudi Arabia

et al. 2020

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Background: Camel production in Saudi Arabia is severely affected by various diseases and by inadequate veterinary services. Ticks and tick-borne pathogens (TBPs) affect the health and wellbeing of camels consequently diminishing their productivity and performances. In addition, camels may act as hosts for TBPs (e.g. Anaplasma phagocytophilum) causing diseases in humans. The current study aimed to determine the prevalence of ixodid ticks and molecularly investigate the associated pathogens in camels from Saudi Arabia. Methods: Blood and tick samples were collected from camels (n = 170) in Riyad Province of Saudi Arabia. Ticks were morphologically identified, and blood of camels were molecularly screened for apicomplexan (i.e. Babesia spp., Theileria spp., Hepatozoon spp.) and rickettsial parasites (i.e. Ehrlichia spp. and Anaplasma spp.). Results: Of the 170 camels examined, 116 (68.2%; 95% CI: 60.9-75.1%) were infested by ticks with a mean intensity of 2.53 (95% CI: 2.4-2.6). In total of 296 ticks collected, Hyalomma dromedarii was the most prevalent (76.4%), followed by Hyalomma impeltatum (23.3%) and Hyalomma excavatum (0.3%). Of the tested animals, 13 (7.6%; 95% CI: 4.3-12.8%) scored positive to at least one TBP, with Anaplasma platys (5.3%; 95% CI: 2.7-9.9%) being the most prevalent species, followed by Anaplasma phagocytophilum, Anaplasma sp., Ehrlichia canis and Hepatozoon canis (0.6% each; 95% CI: 0.04-3.4%). None of the camels were found to be co-infected with more than one pathogen. All samples tested negative for Babesia spp. and Theileria spp. Conclusions: The present study reveals the occurrence of different tick species and TBPs in camels from Saudi Arabia. Importantly, these camels may carry A. phagocytophilum and A. platys, representing a potential risk to humans.

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“…Hyalomma dromedarii is a thermophilic tick usually found in arid and hyper-arid regions [46] with the high prevalence reported from camels in Sudan, Iran, Egypt, Saudi Arabia and Tunisia, with an infection rate ranging between 49-89% [10,[46][47][48][49] although it can also infest sheep, goats and horses [50]. This tick species is the principal vector of Theileria spp.…”

Section: Discussionmentioning

confidence: 99%

Ticks and associated pathogens in camels (Camelus dromedarius) from Riyadh province, Saudi Arabia

Alanazi

Nguyen

Alyousif

et al. 2020

Preprint

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Background: Camel production in Saudi Arabia is severely affected by various diseases and by inadequate veterinary services. Ticks and tick-borne pathogens (TBPs ) affect the health and wellbeing of camels consequently diminishing their productivity and performances. In addition, camels may act as hosts for TBPs (e.g. Anaplasma phagocytophilum ) causing diseases in humans. The current study aimed to determine the prevalence of ixodid ticks and molecularly investigate the associated pathogens in camels from Saudi Arabia. Methods: Blood and tick samples were collected from camels ( n = 170) in Riyad Province of Saudi Arabia. Ticks were morphologically identified, and blood of camels were molecularly screened for apicomplexan (i.e. Babesia spp . , Theileria spp., Hepatozoon spp.) and rickettsial parasites (i.e. Ehrlichia spp. and Anaplasma spp.). Results: Of the 170 camels examined, 116 (68.2%; 95% CI: 60.9–75.1%) were infested by ticks with a mean intensity of 2.53 (95% CI: 2.4–2.6). In total of 296 ticks collected, Hyalomma dromedarii was the most prevalent (76.4%), followed by Hyalomma impeltatum (23.3%) and Hyalomma excavatum (0.3%). Of the tested animals, 13 (7.6%; 95% CI: 4.3–12.8%) scored positive to at least one TBP, with Anaplasma platys (5.3%; 95% CI: 2.7–9.9%) being the most prevalent species, followed by Anaplasma phagocytophilum , Anaplasma sp., Ehrlichia canis and Hepatozoon canis (0.6% each; 95% CI: 0.04–3.4%). None of the camels were found to be co-infected with more than one pathogen. All samples tested negative for Babesia spp. and Theileria spp. Conclusions: The present study reveals the occurrence of different tick species and tick-borne pathogens in camels from Saudi Arabia. Importantly, these camels may carry A. phagocytophilum and A. platys , representing a potential risk to humans.

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Improving specific detection and updating phylogenetic data related to Anaplasma platys-like strains infecting camels (Camelus dromedarius) and their ticks

Cited by 31 publications

References 47 publications

Molecular identification of protozoal and bacterial organisms in domestic animals and their infesting ticks from north-eastern Algeria

Molecular identification of protozoal and bacterial organisms in domestic animals and their infesting ticks from north-eastern Algeria

Ticks and associated pathogens in camels (Camelus dromedarius) from Riyadh Province, Saudi Arabia

Ticks and associated pathogens in camels (Camelus dromedarius) from Riyadh province, Saudi Arabia

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