Detection of Rickettsia spp. in ticks associated to wild mammals in Northeastern Brazil, with notes on an undetermined Ornithodoros sp. collected from marsupials

Maia, Maerle Oliveira; Koppe, Valdinei C.; Muñoz-Léal, Sebastián; Martins, Thiago F.; Marcili, Arlei; Labruna, Marcelo B.; Pacheco, Richard C.

doi:10.1007/s10493-018-0323-2

Cited by 22 publications

(13 citation statements)

References 46 publications

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“…Rickettsia rickettsii and Rickettsia parkeri are causative species of tick-borne spotted fever in Brazil, and these pathogens were found in this country in ticks collected from capybaras in Mato Grosso state (71) and from dogs in Bahia state (72). Rickettsia bacteria have been reported in ticks infesting several wild mammalian species throughout Brazil (73)(74)(75)(76), and in Brazilian wild birds (77,78). Rickettsia parkeri and R. bellii have been found in A. nodosum collected from M. tridactyla and T. tetradactyla in the Southeast and Central-West regions of Brazil (76).…”

Section: Tick-borne Associated Pathogensmentioning

confidence: 94%

Ticks and Associated Pathogens From Rescued Wild Animals in Rainforest Fragments of Northeastern Brazil

et al. 2020

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The Ixodidae family comprises ticks that are hematophagous ectoparasites and are considered vectors of several hemoparasites from the Anaplasmataceae family and the genus Hepatozoon, Babesia, and Rickettsia. These ectoparasites parasitize domestic and wild animals belonging to several vertebrate groups. Ticks are highly adapted to different biomes and thus possess a wide geographical distribution. In the Brazilian state of Bahia, localized in the Northeast region, there are large rainforest fragments. Studies have rarely been carried out on ticks, and their hemoparasites, that parasitize wild animals in this region. Thus, this study aimed to identify the tick species parasitizing wild animals rescued in rainforest fragments of Bahia and investigate the presence of hemoparasites in tick tissues. During a 2-year period, 238 ticks were collected from 41 wild mammalians, reptiles, and amphibians. These ectoparasites were taxonomically classified according to their morphological characteristics. The ticks identified belonged to five different species from the Ixodidae family: Amblyomma varium, Amblyomma rotundatum, Amblyomma nodosum, Ixodes loricatus, and Rhipicephalus sanguineus. For the first time, an A. rotundatum parasitizing the Mesoclemmys tuberculata turtle was described. PCR assays using DNA extracted from salivary glands or midgut of the ticks were performed to detect specific DNA fragments of hemoparasites from the genus Rickettsia, Ehrlichia, Babesia, Hepatozoon, and from the Anaplasmataceae family. The results showed positive detection of the Rickettsia genus (7.9%), Anaplasmataceae family (15.8%), and Hepatozoon genus (15.8%). Specific DNA from the Ehrlichia and Babesia genera were not detected in these samples. Specific DNA from members of the Anaplasmataceae family was detected in A. varium for the first time. The present Fonseca et al. Ticks in Wild Animals work showed that amphibians, reptiles, and mammals from Bahia's Atlantic Forest areparasitized by different tick species, and that these ectoparasites present pathogens in their tissues that impact both humans and animals due to their zoonotic potential.

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Section: Tick-borne Associated Pathogensmentioning

confidence: 94%

Ticks and Associated Pathogens From Rescued Wild Animals in Rainforest Fragments of Northeastern Brazil

et al. 2020

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“…Considering previous published papers, the presumed geographical distribution of Ornithodoros species that are probable vectors of RFGB in Brazil is as follows (Fig. 1 ; Additional file 1 : Table S1): Ornithodoros brasiliensis in Rio Grande do Sul State [ 99 – 103 , 110 ]; O. rudis in the states of Maranhão and Goiás [ 104 , 105 , 111 ]; O. mimon in the states of Minas Gerais, Maranhão, Mato Grosso, Rio Grande do Norte, Pernambuco, Goiás, Ceará and São Paulo [ 105 , 106 , 111 – 113 ]; O. hasei in the states of Ceará, Maranhão, Espírito Santo, Mato Grosso, Mato Grosso do Sul and Amapá [ 105 , 114 – 116 ]; O. rietcorreai in the states of Ceará, Maranhão, Piauí, Tocantins, Bahia and Paraíba [ 105 , 107 , 108 , 111 , 113 , 117 – 119 ]; and O. tabajara in Ceará State [ 105 , 120 ].…”

Section: Historical Overview Of Rfgb In Latin Americamentioning

confidence: 99%

Historical overview and update on relapsing fever group Borrelia in Latin America

et al. 2022

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Relapsing fever group Borrelia (RFGB) are motile spirochetes transmitted to mammalian or avian hosts through the bite of hematophagous arthropods, such as soft ticks (Argasidae), hard ticks (Ixodidae) and the human clothing lice. RFGB can infect pets such as dogs and cats, as well as birds, cattle and humans. Borrelia recurrentis, B. anserina and B. theileri are considered to have worldwide distribution, affecting humans, domestic birds and ruminants, respectively. Borrelia spp. associated with soft ticks are transmitted mainly by Ornithodoros ticks and thrive in endemic foci in tropical and subtropical latitudes. Nowadays, human cases of soft tick-borne relapsing fever remain neglected diseases in several countries, and the impact these spirochetes have on the health of wild and domestic animals is largely understudied. Human infection with RFGB is difficult to diagnose, given the lack of distinguishing clinical features (undifferentiated febrile illness). Clinically, soft tick or louse-borne relapsing fever is often confused with other etiologies, such as malaria, typhoid or dengue. In Latin America, during the first half of the twentieth century historical documents elaborated by enlightened physicians were seminal, and resulted in the identification of RFGB and their associated vectors in countries such as Mexico, Panama, Colombia, Venezuela, Peru and Argentina. Almost 80 years later, research on relapsing fever spirochetes is emerging once again in Latin America, with molecular characterizations and isolations of novel RFGB members in Panama, Bolivia, Brazil and Chile. In this review we summarize historical aspects of RFGB in Latin America and provide an update on the current scenario regarding these pathogens in the region. To accomplish this, we conducted an exhaustive search of all the published literature for the region, including old medical theses deposited in libraries of medical academies. RFGB were once common pathogens in Latin America, and although unnoticed for many years, they are currently the focus of interest among the scientific community. A One Health perspective should be adopted to tackle the diseases caused by RFGB, since these spirochetes have never disappeared and the maladies they cause may be confused with etiologies with similar symptoms that prevail in the region. Graphical Abstract

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“…El bioma Caatinga se refiere a los ecosistemas semiáridos del noreste de Brasil, con baja precipitación y humedad (15). En este bioma, los registros de garrapatas y sus agentes microbianos son más frecuentes en animales silvestres y domésticos, siendo escasos los asociados con humanos (11,16,17,18,19). Curiosamente, dentro del bioma Caatinga, existen áreas aisladas de bosque que se asemejan a la selva humeda tropical atlántica a mayor altitud, generalmente >400 metros sobre el nivel del mar.…”

Section: Introductionunclassified

Candidatus Rickettsia andeanae en Amblyomma parvum parasitando humanos en un refugio forestal de gran altitud dentro del bioma Caatinga, Brasil

Acosta

Costa-Neto²,

Lucio³

et al. 2022

Rev MVZ Córdoba

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Objetivo. Informe sobre especies de garrapatas que parasitan a los humanos en un área del bioma semiárido de Caatinga, noreste de Brasil, con nota de infección por rickettsias. Materiales y métodos. Todas las garrapatas se identificaron morfológicamente con estereomicroscopio. Algunas de las garrapatas recolectadas se analizaron molecularmente para detectar la presencia de ADN de bacterias del género Rickettsia. Las garrapatas se sometieron individualmente a la extracción de ADN (gen de la citrato sintasa [gltA] y gen de la proteína de la membrana externa [ompA]). Resultados. Se recolectaron un total de 78 garrapatas en humanos, identificadas como adultos de Amblyomma parvum (62 hembras y 16 machos). De estas, 15 mujeres fueron infectadas por ‘Candidatus Rickettsia andeanae’. Conclusiones. El presente estudio confirma una zona más de riesgo humano de picaduras de garrapatas en Brasil, también de la rickettsia no patógena 'Ca. Rickettsia andeanae'

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Detection of Rickettsia spp. in ticks associated to wild mammals in Northeastern Brazil, with notes on an undetermined Ornithodoros sp. collected from marsupials

Cited by 22 publications

References 46 publications

Ticks and Associated Pathogens From Rescued Wild Animals in Rainforest Fragments of Northeastern Brazil

Ticks and Associated Pathogens From Rescued Wild Animals in Rainforest Fragments of Northeastern Brazil

Historical overview and update on relapsing fever group Borrelia in Latin America

Candidatus Rickettsia andeanae en Amblyomma parvum parasitando humanos en un refugio forestal de gran altitud dentro del bioma Caatinga, Brasil

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