Clinical and epidemiological comparison of Rickettsia parkeri rickettsiosis, related to Amblyomma triste and Amblyomma tigrinum, in Argentina

2020 ◽  
Vol 11 (4) ◽  
pp. 101436 ◽  
Author(s):  
Yamila Romer ◽  
Pablo Borrás ◽  
Francisco Govedic ◽  
Santiago Nava ◽  
José Ignacio Carranza ◽  
...  
Keyword(s):  
Rickettsia Parkeri ◽  
Amblyomma Triste ◽  
Amblyomma Tigrinum

scholarly journals Comparative Evaluation of Infected and NoninfectedAmblyomma tristeTicks withRickettsia parkeri, the Agent of an Emerging Rickettsiosis in the New World

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
F. A. Nieri-Bastos ◽  
M. P. J. Szabó ◽  
R. C. Pacheco ◽  
J. F. Soares ◽  
H. S. Soares ◽  
...  
Keyword(s):  
Infected Group ◽  
Control Group ◽  
Control Groups ◽  
Rickettsia Parkeri ◽  
Amblyomma Triste ◽  
Vertebrate Hosts ◽  
Domestic Rabbits ◽  
And Control ◽  
Term Maintenance

The distribution ofRickettsia parkeriin South America has been associated withAmblyomma tristeticks. The present study evaluated under laboratory conditions two colonies ofA. triste: one started from engorged females that were naturally infected byR. parkeri(designated as infected group); the other started from noninfected females (designated as control group). Both colonies were reared in parallel for five consecutive generations. Tick-naïve domestic rabbits were used for feeding of each tick stage and generation.R. parkeriwas preserved by transstadial maintenance and transovarial transmission inA. tristeticks for five consecutive generations, because all tested larvae, nymphs, and adults from the infected group were shown by PCR to contain rickettsial DNA. All rabbits infested by larvae, nymphs, and adults from the infected group seroconverted, indicating that these tick stages were all vector competent forR. parkeri. Expressive differences in mortality rates were observed between engorged nymphs from the infected and control groups, as indicated by 65.9% and 92.4% molting success, respectively. Our results indicate thatA. tristecan act as a natural reservoir forR. parkeri. However, due to deleterious effect caused byR. parkerion engorged nymphs, amplifier vertebrate hosts might be necessary for natural long-term maintenance ofR. parkeriinA. triste.

First molecular detection of Rickettsia parkeri in Amblyomma tigrinum and Amblyomma dubitatum ticks from Uruguay

2014 ◽  
Vol 5 (6) ◽  
pp. 660-662 ◽  
Author(s):  
Paula Lado ◽  
Oscar Castro ◽  
Marcelo B. Labruna ◽  
José M. Venzal
Keyword(s):  
Molecular Detection ◽  
Rickettsia Parkeri ◽  
Amblyomma Tigrinum

scholarly journals Primer reporte de Haemaphysalis juxtakochi Cooley, 1946 (Acari: Ixodidae) parasitando equinos en Uruguay

2019 ◽  
Vol 18 (1) ◽  
pp. 9-11
Author(s):  
María Laura FELIX ◽  
José Manuel VENZAL
Keyword(s):  
Rhipicephalus Microplus ◽  
Amblyomma Triste ◽  
Mazama Gouazoubira ◽  
Amblyomma Tigrinum

Se presenta el primer reporte de Haemaphysalis juxtakochi Cooley, 1946 parasitando equinos en Uruguay. Adultos de esta especie de garrapata fueron hallados en un equino junto a Rhipicephalus microplus (Canestrini, 1888)  en una localidad del departamento de Tacuarembó, con presencia de monte nativo denso y abundante fauna silvestre, como el ciervo guazubirá (Mazama gouazoubira), hospedador preferencial de adultos de H. juxtakochi. Con este hallazgo son cuatro las especies de garrapatas parásitas de equinos reportadas para Uruguay: R. microplus, Amblyomma tigrinum Koch, 1844, Amblyomma triste Koch, 1844 y H. juxtakochi. La importancia médico-veterinario de H. juxtakochi en equinos es desconocida.

scholarly journals Rickettsial infection in ticks infesting wild birds from two eco-regions of Argentina

2016 ◽  
Vol 25 (3) ◽  
pp. 378-382 ◽  
Author(s):  
Fernando Sebastián Flores ◽  
Francisco Borges Costa ◽  
Santiago Nava ◽  
Luiz Adrián Diaz ◽  
Marcelo Bahia Labruna
Keyword(s):  
Passerine Birds ◽  
Human Pathogens ◽  
Rickettsial Infection ◽  
Rickettsia Parkeri ◽  
Rickettsia Species ◽  
Potential Vector ◽  
Zonotrichia Capensis ◽  
Polymerase Chain ◽  
First Time ◽  
Amblyomma Tigrinum

Abstract Several tick-borne Rickettsia species are recognized human pathogens in Argentina. Here we evaluated rickettsial infection in ticks collected on passerine birds during 2011-2012 in two eco-regions of Argentina. The ticks were processed by molecular analysis through polymerase chain reaction (PCR) detection and DNA sequencing of fragments of two rickettsial genes, gltA and ompA. A total of 594 tick specimens (532 larvae and 62 nymphs), representing at least 4 species (Amblyomma tigrinum, Ixodes pararicinus, Haemaphysalis juxtakochi, Haemaphysalis leporispalustris), were evaluated. At least one A. tigrinum larva, collected on Coryphospingus cucullatus in Chaco Seco, was infected with Rickettsia parkeri, whereas at least 12 larvae and 1 nymph of I. pararicinus, collected from Troglodytes aedon, Turdus amaurochalinus, Turdus rufiventris, C. cucullatus and Zonotrichia capensis, were infected with an undescribed Rickettsia agent, genetically related to several rickettsial endosymbionts of ticks of the Ixodes ricinus complex. R. parkeri is a recognized human pathogen in several American countries including Argentina, where a recent study incriminated A. tigrinum as the potential vector of R. parkeri to humans. Birds could play an important role in dispersing R. parkeri-infected A. tigrinum ticks. Additionally, we report for the first time a rickettsial agent infecting I. pararicinus ticks.

scholarly journals Rickettsia parkeri Rickettsiosis in Different Ecological Regions of Argentina and Its Association with Amblyomma tigrinum as a Potential Vector

2014 ◽  
Vol 91 (6) ◽  
pp. 1156-1160 ◽  
Author(s):  
Yamila Romer ◽  
Gabriel Cicuttin ◽  
Francisco Govedic ◽  
Christopher D. Paddock ◽  
Cecilia Y. Kato ◽  
...  
Keyword(s):  
Rickettsia Parkeri ◽  
Potential Vector ◽  
Ecological Regions ◽  
Amblyomma Tigrinum

In vitro isolation and infection intensity of Rickettsia parkeri in Amblyomma triste ticks from the Paraná River Delta region, Argentina

2014 ◽  
Vol 5 (6) ◽  
pp. 924-927 ◽  
Author(s):  
Lucas D. Monje ◽  
Santiago Nava ◽  
Leandro R. Antoniazzi ◽  
Valeria C. Colombo ◽  
Pablo M. Beldomenico
Keyword(s):  
Infection Intensity ◽  
Paraná River ◽  
River Delta ◽  
Delta Region ◽  
Rickettsia Parkeri ◽  
Parana River ◽  
Amblyomma Triste

Amblyomma triste Koch, 1844 (Acari: Ixodidae): Hosts and seasonality of the vector of Rickettsia parkeri in Uruguay

2008 ◽  
Vol 155 (1-2) ◽  
pp. 104-109 ◽  
Author(s):  
J.M. Venzal ◽  
A. Estrada-Peña ◽  
O. Castro ◽  
C.G. de Souza ◽  
M.L. Félix ◽  
...  
Keyword(s):  
Rickettsia Parkeri ◽  
Amblyomma Triste

Rickettsia parkeri infecting free-living Amblyomma triste ticks in the Brazilian Pantanal

2015 ◽  
Vol 6 (3) ◽  
pp. 237-241 ◽  
Author(s):  
Andréia L.T. Melo ◽  
Alvair S. Alves ◽  
Fernanda A. Nieri-Bastos ◽  
Thiago F. Martins ◽  
Rute Witter ◽  
...  
Keyword(s):  
Free Living ◽  
Rickettsia Parkeri ◽  
Amblyomma Triste ◽  
Brazilian Pantanal

scholarly journals Avian Migrants Facilitate Invasions of Neotropical Ticks and Tick-Borne Pathogens into the United States

2015 ◽  
Vol 81 (24) ◽  
pp. 8366-8378 ◽  
Author(s):  
Emily B. Cohen ◽  
Lisa D. Auckland ◽  
Peter P. Marra ◽  
Sarah A. Hamer
Keyword(s):  
United States ◽  
Migratory Birds ◽  
Spotted Fever ◽  
Animal Health ◽  
The United States ◽  
Etiologic Agent ◽  
Rickettsia Parkeri ◽  
Blood Samples ◽  
Content Type ◽  
Amblyomma Triste

ABSTRACTMigratory birds have the potential to transport exotic vectors and pathogens of human and animal health importance across vast distances. We systematically examined birds that recently migrated to the United States from the Neotropics for ticks. We screened both ticks and birds for tick-borne pathogens, includingRickettsiaspecies andBorrelia burgdorferi. Over two spring seasons (2013 and 2014), 3.56% of birds (n= 3,844) representing 42.35% of the species examined (n= 85) were infested by ticks. Ground-foraging birds with reduced fuel stores were most commonly infested. Eight tick species were identified, including seven in the genusAmblyomma, of which onlyAmblyomma maculatum/Amblyomma tristeis known to be established in the United States. Most ticks on birds (67%) were neotropical species with ranges in Central and South America. Additionally, a singleIxodesgenus tick was detected. A total of 29% of the ticks (n= 137) and no avian blood samples (n= 100) were positive for infection withRickettsiaspecies, includingRickettsia parkeri, an emerging cause of spotted fever in humans in the southern United States, a species in the group ofRickettsiamonacensis, and uncharacterized species and endosymbionts of unknown pathogenicity. No avian tick or blood samples tested positive forB. burgdorferi, the etiologic agent of Lyme disease. An extrapolation of our findings suggests that anywhere from 4 to 39 million exotic neotropical ticks are transported to the United States annually on migratory songbirds, with uncertain consequences for human and animal health if the current barriers to their establishment and spread are overcome.

Sign in / Sign up

Export Citation Format

Share Document