Riquetsioses no Brasil e Portugal: ocorrência, distribuição e diagnóstico

Galvão, Márcio Antônio Moreira; Silva, Luiz Jacintho da; Nascimento, Elvira Maria Mendes do; Calic, Simone Berger; Sousa, Rita de; Bacellar, Fátima

doi:10.1590/s0034-89102005000500023

Cited by 37 publications

(35 citation statements)

References 26 publications

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“…In the present study, the seroprevalence of rickettsial antibodies in horses was 8.45% which is low compared to that reported (25 and 27.3%) in other studies in non-endemic areas of Brazil (LEMOS, 1996;HORTA et al, 2004;GALVÃO et al, 2005;CARDOSO et al, 2006;FREITAS, 2007;FREITAS et al, 2010). However Freitas (2007) investigated an area where there was an outbreak of BSF and a human case reported.…”

Section: Discussioncontrasting

confidence: 68%

Serological survey of Rickettsia sp. in horses and dogs in an non-endemic area in Brazil

Batista

Silva

Green

et al. 2010

Rev. Bras. Parasitol. Vet.

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Brazilian Spotted Fever (BSF) is a lethal rickettsiosis in humans caused by the bacteria Rickettsia rickettsii, and is endemic in some areas of Brazil. Horses and dogs are part of the disease's life cycle and they may also serve as sentinel animals in epidemiological studies. The first human BSF case in the State of Paraná was reported in 2005. The present study was conducted in the municipality of Almirante Tamandaré, where no previous case of BSF was reported. Serum samples were collected from 71 horses and 20 dogs from nine properties in the area. Ticks were also collected from these animals. All farmers completed a questionnaire about their knowledge of BSF and animal health management. Serum samples were analyzed by indirect immunofluorescent-antibody assay (IFA) using R. rickettsii and R. parkeri as antigens. Ticks were analyzed by PCR for Rickettsia sp., and all of them were PCR-negative. Six horses (8.45%) and 4 dogs (20%) were identified as seropositive. Farmers were not aware of the correlation between the presence of ticks and risk of BSF. Although a non-endemic area, Almirante Tamandaré is a vulnerable environment for BSF and effective tick control measures are required.

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Section: Discussioncontrasting

confidence: 68%

Serological survey of Rickettsia sp. in horses and dogs in an non-endemic area in Brazil

Batista

Silva

Green

et al. 2010

Rev. Bras. Parasitol. Vet.

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“…[3][4][5][6][7][8] Lyme disease-like syndrome is an emerging clinical entity that has been described in Brazil, and imitates the clinical manifestations of the classical Lyme disease from the northern hemisphere. However, no spirochetes have been identified in Brazilian patients and ticks, despite exhaustive use of molecular and microbiological assays on clinical samples.…”

Section: Introductionmentioning

confidence: 99%

Survey for Tick-Borne Zoonoses in the State of Espirito Santo, Southeastern Brazil

Spolidorio¹,

Labruna²,

Machado³

et al. 2010

The American Society of Tropical Medicine and Hygiene

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Blood samples collected from 201 humans, 92 dogs, and 27 horses in the state of Espirito Santo, Brazil, were tested by polymerase chain reaction, indirect immunofluorescence assays, and indirect enzyme-linked immunosorbent assay for tick-borne diseases (rickettsiosis, ehrlichiosis, anaplasmosis, borreliosis, babesiosis). Our results indicated that the surveyed counties are endemic for spotted fever group rickettsiosis because sera from 70 (34.8%) humans, 7 (7.6%) dogs, and 7 (25.9%) horses were reactive to at least one of the six Rickettsia species tested. Although there was evidence of ehrlichiosis (Ehrlichia canis) and babesiosis (Babesia canis vogeli, Theileria equi) in domestic animals, no human was positive for babesiosis and only four individuals were serologically positive for E. canis. Borrelia burgdorferi-serologic reactive sera were rare among humans and horses, but encompassed 51% of the canine samples, suggesting that dogs and their ticks can be part of the epidemiological cycle of the causative agent of the Brazilian zoonosis, named Baggio-Yoshinari Syndrome.

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“…In addition to improved conclusion of fatal cases, this high case-fatality rate in the State of Minas Gerais may also reflect health workers' difficulty in suspecting BSF. As suggested previously 15,16 , other more common diseases like dengue and other febrile exanthematic diseases show similar clinical characteristics and can cause confusion in the differential diagnosis. For the vast majority of these diseases, the recommended treatment does not require the use of antibiotics, or when it does, the antibiotics are not effective for treating BSF.…”

Section: Discussionmentioning

confidence: 73%

Epidemiological characteristics of Brazilian spotted fever in Minas Gerais State, Brazil, 2000-2008

et al. 2011

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Brazilian spotted fever is the most common rickettsiosis in Brazil, most prevalent in the States of São Paulo and Minas Gerais. The aim of this study was to describe the epidemiological characteristics of Brazilian spotted fever in Minas Gerais from 2000 to 2008. Of the 132 cases of Brazilian spotted fever, 53 patients died, representing a case-fatality rate of 40.2%. Males predominated, with 78.8% of confirmed cases, and median age was 26.5 years. Absence of rash was associated with increased risk of death (p = 0.005). Greater Metropolitan Belo Horizonte, Rio Doce Valley, and Zona da Mata accounted for 70.6% of the cases, which occurred mainly from May to November. There was an increase in the number of cases, which could suggest an expansion of the disease, but probably resulted from an increase in the health system's diagnostic capacity and sensitivity. Despite this improvement, the case-fatality rate remains high and with no apparent tendency to decrease, thus indicating the need for improved prevention and patient care.

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Riquetsioses no Brasil e Portugal: ocorrência, distribuição e diagnóstico

Cited by 37 publications

References 26 publications

Serological survey of Rickettsia sp. in horses and dogs in an non-endemic area in Brazil

Serological survey of Rickettsia sp. in horses and dogs in an non-endemic area in Brazil

Survey for Tick-Borne Zoonoses in the State of Espirito Santo, Southeastern Brazil

Epidemiological characteristics of Brazilian spotted fever in Minas Gerais State, Brazil, 2000-2008

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