Fatal case of spotted fever in a patient from Northeastern Brazil

Oliveira, Stefan Vilges de; Costa, Raylene Medeiros Ferreira; Ferreira, Geane Maria de Oliveira Gonçalves; Pereira, Simone Valéria Costa; Amorim, Marinete; Monteiro, Maria Fernanda Melo; Alves, Lêucio Câmara

doi:10.1590/s1678-9946201860021

Cited by 8 publications

(2 citation statements)

References 20 publications

(26 reference statements)

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“…Additionally, it is possible to hypothesize that those SFR hospitalizations received correct treatment which thus prevented fatal outcomes. Lack of knowledge of such SFR epidemic scenarios is also not uncommon in other areas of the country (9,34,36,48,49,96), and is probably associated with the lack of adequate and timely investigations of patients and in the associated environment, that would allow the conditioning factors of each case to be characterized and defined.…”

Section: Resultsmentioning

confidence: 99%

Biodiversity of Potential Vectors of Rickettsiae and Epidemiological Mosaic of Spotted Fever in the State of Paraná, Brazil

Durães

Bitencourth

Ramalho

et al. 2021

Front. Public Health

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Spotted Fever Rickettsioses (SFR) are diseases caused by bacteria of the genus Rickettsia, and are transmitted mainly by ticks. Its eco-epidemiological scenarios vary spatially, and may also vary over time due to environmental changes. It is the main disease transmitted by ticks to humans in Brazil, with the state of Paraná (PR) having the sixth highest number of notified incidences in the country. However, information is lacking regarding the SFR disease cycles at likely infection sites within PR. During case investigations or environmental surveillance in PR for SFR, 28,517 arthropods were collected, including species known or potentially involved in the SFR cycles, such as Amblyomma sculptum, Amblyomma aureolatum, Amblyomma ovale, Amblyomma dubitatum, Amblyomma parkeri, Ctenocephalides felis felis, and Rhipicephalus sanguineus sensu lato. From these Rickettsia asembonensis, Rickettsia bellii, Rickettsia felis, Rickettsia parkeri strain Atlantic Rainforest and Candidatus Rickettsia paranaensis were detected. Ectoparasite abundance was found to be related with specific hosts and collection environments. Rickettsiae circulation was observed for 48 municipalities, encompassing 16 Health Regions (HR). As for socio-demographic and assistance indicators, circulation occurred largely in the most urbanized HR, with a higher per capita Gross Domestic Product, lower Family Health Strategy coverage, and with a higher ratio of beds in the Unified Health System per thousand inhabitants. For environmental variables, circulation occurred predominantly in HR with a climatic classified as “subtropical with hot summers” (Cfa), and with forest type phytogeographic formations. In terms of land use, circulation was commonest in areas with agriculture, pasture and fields and forest cover. Rickettsiae were circulating in almost all hydrographic basins of PR state. The results of this study provide the first descriptive recognition of SFR in PR, as well as outlining its eco-epidemiological dynamics. These proved to be quite heterogeneous, and analyzed scenarios showed characteristics strongly-associated with the outbreaks, with cases presenting clinical variation in space, so illustrating the complexity of scenarios in PR state. Due to the diversity of the circumstances surrounding SFR infections in PR, public health initiatives are necessary to foster a better understanding of the dynamics and factors effecting vulnerability to SFR in this Brazilian state.

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Section: Resultsmentioning

confidence: 99%

Biodiversity of Potential Vectors of Rickettsiae and Epidemiological Mosaic of Spotted Fever in the State of Paraná, Brazil

Durães

Bitencourth

Ramalho

et al. 2021

Front. Public Health

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“…Without already recognized vectors or detection of Rickettsia in these vectors, it is difficult to characterize the bioagent circulation mechanism involved in such outbreaks (e.g. Oliveira et al 2016aOliveira et al , 2016bOliveira et al , 2017Oliveira et al , 2018. In addition, in recent decades, other potentially pathogenic species of Rickettsia, as well as new species of ticks with vector potential, have been reported from Brazil (e.g.…”

Section: Introductionmentioning

confidence: 99%

Ticks (Acari: Ixodidae) on wild raptors in Brazil

Teixeira

Luz

Pacheco

et al. 2020

International Journal of Acarology

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The tick Rhipicephalus (Boophilus) microplus has been considered a major pest of cattle in tropical regions of the world, inducing significant economic impact on livestock activity. In Brazil, the scenarios of Spotted Fever (SF) epidemic cycles involve Amblyomma sculptum and Amblyomma aureolatum, transmitting Rickettsia rickettsii, as well as Amblyomma ovale, transmitting R. parkeri strain Atlantic Rainforest. However, other potentially pathogenic species of Rickettsia, as well as new species of ticks with vector potential, have been reported for Brazil. Thus, during SF focus investigation and environmental surveillance performed by Brazilian National Network of Environment Surveillance for Tick-borne Diseases between 2011 to 2017, ectoparasites were collected from vertebrate hosts and the environment in rural and urban areas of different Brazilian biomes. Here we analysed Rickettsiae infection in Rh. microplus and possible roles of this tick species in the maintenance and circulation of Rickettsia sp. in SF endemic areas. Cattle tick samples were naturally infected with R. rickettsii, R. parkeri, R. felis, R. tamurae, R. rhipicephali and R. bellii. The data in this study demonstrate that Rh. microplus acquires Rickettsia infection, including pathogenic species, and indicates this tick as suggested marker of Rickettsiae potential presence or circulation.

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