Rickettsia parkeri and Candidatus Rickettsia andeanae in Amblyomma maculatum Group Ticks

Noden, Bruce H.; Roselli, Megan A; Loss, Scott R.

doi:10.3201/eid2602.190664

Cited by 18 publications

(12 citation statements)

References 10 publications

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“…Recently, R. parkeri (that causes spotted fever rickettsiosis in humans) and Cand. R. andeanae were reported widely in several tick species across wide geographic regions [ 40 , 41 , 42 ]. Although Cand.…”

Section: Discussionmentioning

confidence: 99%

Four Tick-Borne Microorganisms and Their Prevalence in Hyalomma Ticks Collected from Livestock in United Arab Emirates

2021

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Ticks and associated tick-borne diseases in livestock remain a major threat to the health of animals and people worldwide. However, in the United Arab Emirates (UAE), very few studies have been conducted on tick-borne microorganisms thus far. The purpose of this cross-sectional DNA-based study was to assess the presence and prevalence of tick-borne Francisella sp., Rickettsia sp., and piroplasmids in ticks infesting livestock, and to estimate their infection rates. A total of 562 tick samples were collected from camels, cows, sheep, and goats in the Emirates of Abu Dhabi, Dubai, and Sharjah from 24 locations. DNA was extracted from ticks and PCR was conducted. We found that Hyalomma dromedarii ticks collected from camels had Francisella sp. (5.81%) and SFG Rickettsia (1.36%), which was 99% similar to Candidatus Rickettsia andeanae and uncultured Rickettsia sp. In addition, Hyalomma anatolicum ticks collected from cows were found to be positive for Theileria annulata (4.55%), whereas H. anatolicum collected from goats were positive for Theileria ovis (10%). The widespread abundance of Francisella of unknown pathogenicity and the presence of Rickettsia are a matter of concern. The discovery of T. ovis from relatively few samples from goats indicates the overall need for more surveillance. Increasing sampling efforts over a wider geographical range within the UAE could reveal the true extent of tick-borne diseases in livestock. Moreover, achieving successful tick-borne disease control requires more research and targeted studies evaluating the pathogenicity and infection rates of many microbial species.

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Section: Discussionmentioning

confidence: 99%

Four Tick-Borne Microorganisms and Their Prevalence in Hyalomma Ticks Collected from Livestock in United Arab Emirates

2021

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“…12 It is a known vector of Rickettsia parkeri and other bacterial species, including Candidatus Rickettsia andeanae. 25 In hard ticks, the blood-feeding process occurs once in each post-embryonic life stage, whereas soft ticks feed multiple times on the host. The tick feeding on the host can be divided into the stages of attachment, slow feeding, fast feeding (24-48 hours before detachment), repletion and disengagement from the host Figure 1.…”

Section: I Imentioning

confidence: 99%

“…Bird migration and animal movement have likely contributed to the vast distribution of this tick across the USA 12 . It is a known vector of Rickettsia parkeri and other bacterial species, including Candidatus Rickettsia andeanae 25 …”

Section: Tick Haematophagymentioning

confidence: 99%

Recent advances in understanding tick and rickettsiae interactions

Karim

Kumar

Budachetri

2021

Parasite Immunology

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Arthropod vector ticks harbour a diverse range of viral, bacterial and protozoan agents and transmit them to their mammalian host, making them a major public health threat. [1][2][3][4][5] According to the Centers for Disease Control and Prevention (CDC), a total of 491 671 cases of tick-borne diseases (TBDs) (~76.5% of all vector-borne diseases) were reported in the USA and territories from 2004 to 2016. 6 Lyme disease is the most common vector-borne disease in the USA, and a recently released estimate based on medical insurance records suggests that approximately 476 000 Americans are annually diagnosed and treated for this disease. Even more TBDs are recorded by the CDC. 6 The total number of reported rickettsial cases jumped from 495 infections in 2000 to 6248 infections in 2017. 7 As exposure to ticks will likely increase, due to expanding deer and rodent populations and global climate change, an increasing number of people will be at risk of contracting rickettsiosis that is vectored by tick species.Various tick species can transmit >20 emerging and resurgent agents, all capable of causing significant diseases, including alphagal syndrome, 8 in humans and animals, including livestock, pets and wildlife. Rickettsial pathogens cause life-threatening human infections and are significant causes of morbidity globally. Arthropod vectors, such as ticks, fleas, lice and chiggers, transmit the intracellular bacteria that cause these diseases. Rickettsial diseases have been responsible for the loss of millions of lives throughout history. 9 An estimated one billion people worldwide are at risk of rickettsial diseases, which are caused by an obligate intracellular Gram-negative bacterium, 10,11 and this enhanced risk is partly due to rapid global travel and the high-volume international livestock trade. Previously, strict

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“…In ticks, bacteria have been the most commonly studied organisms in the microbiome-disease risk context. To date, studies have shown the mutually exclusive occurrence of pathogenic and non-pathogenic Rickettsia species in Amblyomma maculatum and Dermacentor andersoni ticks (Burgdorfer et al, 1981;Noden et al, 2020;Paddock et al, 2015), as well as a negative association between R. bellii and Anaplasma marginale in D. andersoni ticks (Gall et al, 2016). Regarding facilitative interactions, Candidatus Midichloria mitochondrii (hereafter M. mitochondrii) has been shown to be a successful colonizing partner of pathogenic R. parkeri, in A. maculatum ticks (Budachetri et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Questing microbioticks : Interactions of microbes, ticks, vertebrates, and the environment

Krawczyk

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The influence of external (a)biotic factors on the maintenance of symbionts in tick populations depends much on symbionts' mode of transmission. (this thesis) <. Ticks choose their symbionts rather than symbionts choose their ticks. (this thesis) =. An infection that is a burden for an individual can be beneficial for a population. @. The !AS rRNA amplicon sequencing technique is a powerful tool for forming hypotheses. H. We are selective about who or what should be a member of the (bio)diversity we want to preserve. A. Nowadays, it is difficult to distinguish what we really think from what we have read online.

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Rickettsia parkeri and Candidatus Rickettsia andeanae in Amblyomma maculatum Group Ticks

Cited by 18 publications

References 10 publications

Four Tick-Borne Microorganisms and Their Prevalence in Hyalomma Ticks Collected from Livestock in United Arab Emirates

Four Tick-Borne Microorganisms and Their Prevalence in Hyalomma Ticks Collected from Livestock in United Arab Emirates

Recent advances in understanding tick and rickettsiae interactions

Questing microbioticks : Interactions of microbes, ticks, vertebrates, and the environment

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