Molecular Detection of<i>Ehrlichia chaffeensis</i>in<i>Amblyomma parvum</i>Ticks, Argentina

Tomassone, Laura; Núñez, Paula Gabriela; Gürtler, Ricardo E.; Ceballos, Leonardo A.; Orozco, Marcela; Kitron, Uriel; Farber, Marisa Diana

doi:10.3201/eid1412.080781

Cited by 39 publications

(30 citation statements)

References 9 publications

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“…Specimens of this tick have been found to be naturally infected with Coxiella burnetii, Ehrlichia chaffeensis, and Candidatus 'Rickettsia andeanae' (Labruna et al, 2011;Pachecho et al, 2007;2013;Tomassone et al, 2008). Aragão described A. parvum in 1908(Aragão, 1908 and further illustrated it in 1911 (Aragão, 1911).…”

Section: Introductionmentioning

confidence: 97%

Amblyomma parvum Aragão, 1908 (Acari: Ixodidae): Phylogeography and systematic considerations

Lado

Nava

Labruna

et al. 2016

Ticks and Tick-borne Diseases

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Section: Introductionmentioning

confidence: 97%

Amblyomma parvum Aragão, 1908 (Acari: Ixodidae): Phylogeography and systematic considerations

Lado

Nava

Labruna

et al. 2016

Ticks and Tick-borne Diseases

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“…A. parvum was found on all host species; it was the most abundant tick on humans, and was found infected by SFG rickettsiae. Moreover, Ehrlichia chaffeensis , the agent of human monocytotropic ehrlichiosis, was recently detected in A. parvum in the same geographic area (Tomassone et al 2008); this tick species is therefore a potential threat to human health.…”

Section: Discussionmentioning

confidence: 99%

Detection of “Candidatus Rickettsia sp. strain Argentina”and Rickettsia bellii in Amblyomma ticks (Acari: Ixodidae) from Northern Argentina

Tomassone

Núñez²,

Ceballos

et al. 2010

Exp Appl Acarol

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Ixodid ticks were collected from vegetation and from humans, wild and domestic mammals in a rural area in the semi-arid Argentine Chaco in late spring 2006 to evaluate their potential role as vectors of Spotted Fever Group (SFG) rickettsiae. A total of 233 adult ticks, identified as Amblyomma parvum, Amblyomma tigrinum and Amblyomma pseudoconcolor, was examined for Rickettsia spp. We identified an SFG rickettsia of unknown pathogenicity, “Candidatus Rickettsia sp. strain Argentina”, in A. parvum and A. pseudoconcolor by PCR assays targeting gltA, ompA, ompB and 17-kDa outer membrane antigen rickettsial genes. Rickettsia bellii was detected in a host-seeking male of A. tigrinum. Amblyomma parvum is widespread in the study area and is a potential threat to human health.

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“…DNA was extracted from blood by phenol/chloroform method followed by a standard ethanol precipitation [56]. Blood samples were screened using PCR protocols targeting a fragment of the 16SrRNA gene for the Anaplasmataceae family [57,58], a fragment of the internal transcribed spacer 23S-5S of Rickettsia sp. [59] and a fragment of the 18SrRNA gene for Trypanosoma sp.…”

Section: Trypanosoma Theileri T Evansi a Platys A Odocoilei Amentioning

confidence: 99%

Baseline studies on the health of marsh deer (Blastocerus dichotomus) populations from Argentina: laying the grounds for an improved interpretation of mortality episodes

Orozco¹,

Argibay²,

Minatel³

et al. 2020

Preprint

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Background: The comprehensive approach to diseases in broad ecological contexts appears as a new challenge for global health and draws on baseline studies to detect changes in the occurrence of pathogens over time. Marsh deer (Blastocerus dichotomus) mortality episodes were described in Argentina and several pathogens associated with environmental and eco-epidemiological factors were indicated as risk factors. To date, the lack of basic health information on these populations has hampered interpretation of findings. This study aimed to provide baseline data on health parameters in marsh deer populations from Argentina. Results: Between May 2014 and December 2016 we determined health parameters in 44 marsh deer with different body condition scores, and studied the pathological lesions in dead animals. Marsh deer with poor body condition had a high burden of the ticks Amblyomma triste and Rhipicephalus microplus. Vector borne agents (VBAs), such as Theileria cervi. Trypanosoma theileri, Trypanosoma evansi, Ehrlichia chaffeensis, Anaplasma platys, Anaplasma odocoilei, Anaplasma marginale, and Candidatus Anaplasma boolense were also found. Haemonchus spp, Ostertagia spp., Trichostrongylus spp. showed the highest infection prevalence. A Multiple Correspondence Analysis suggested a possible association of i) lower body score condition with high tick loads and infection with VBAs and, ii) the impoverished body score with high loads of nemathelminths and well-known harmful gastrointestinal parasites. Conclusions: Our results contribute with knowledge on the life history and health aspects of marsh deer in the study areas. We provide data on the prevalent infectious and parasitic agents in their populations. A range of haematology and serum chemistryvalues, and the occurrence of Fasciola hepatica and Leptospira interrogans serovar pyrogenes were reported for the first time in wild marsh deer from Argentina. The histopathological findings in succumbed animals allowed us to recognize injuries associated or not with their body condition. Our results are the first step in the creation of a baseline on marsh deer health in Argentina. In the future, these data added to new contributions could help improve the interpretation of the findings during mortality events.

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Molecular Detection ofEhrlichia chaffeensisinAmblyomma parvumTicks, Argentina

Cited by 39 publications

References 9 publications

Amblyomma parvum Aragão, 1908 (Acari: Ixodidae): Phylogeography and systematic considerations

Amblyomma parvum Aragão, 1908 (Acari: Ixodidae): Phylogeography and systematic considerations

Detection of “Candidatus Rickettsia sp. strain Argentina”and Rickettsia bellii in Amblyomma ticks (Acari: Ixodidae) from Northern Argentina

Baseline studies on the health of marsh deer (Blastocerus dichotomus) populations from Argentina: laying the grounds for an improved interpretation of mortality episodes

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