New Epidemiological Data on Brazilian Spotted Fever in an Endemic Area of the State of São Paulo, Brazil

2009 ◽  
Vol 9 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Jonas Moraes-Filho ◽  
Adriano Pinter ◽  
Richard C. Pacheco ◽  
Thais B. Gutmann ◽  
Sonia O. Barbosa ◽  
...  
Keyword(s):  
Endemic Area ◽  
Spotted Fever ◽  
Epidemiological Data ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Brazilian Spotted Fever

scholarly journals Serosurvey of Rickettsia spp. in dogs and humans from an endemic area for Brazilian spotted fever in the State of São Paulo, Brazil

2008 ◽  
Vol 24 (2) ◽  
pp. 247-252 ◽  
Author(s):  
Adriano Pinter ◽  
Maurício C. Horta ◽  
Richard C. Pacheco ◽  
Jonas Moraes-Filho ◽  
Marcelo B. Labruna
Keyword(s):  
Human Serum ◽  
Endemic Area ◽  
Spotted Fever ◽  
Sao Paulo ◽  
The State ◽  
The Other ◽  
São Paulo ◽  
Human Sera ◽  
Antibody Titers ◽  
Brazilian Spotted Fever

The present study provides a rickettsial serosurvey in 25 dogs and 35 humans in an endemic area for Brazilian spotted fever in the State of São Paulo, where the tick Amblyomma aureolatum is the main vector. Testing canine and human sera by indirect immunofluorescence against four Rickettsia antigens (R. rickettsii, R. parkeri, R. felis and R. bellii) showed that 16 (64%) of canine sera and 1 (2.8%) of human sera reacted to at least one of these rickettsial antigens with titers <FONT FACE=Symbol>³</FONT> 64. Seven canine sera and the single reactive human serum showed titers to R. rickettsii at least four times those of any of the other three antigens. The antibody titers in these 7 animals and 1 human were attributed to stimulation by R. rickettsii infection. No positive canine or human serum was attributed to stimulation by R. parkeri, R. felis, or R. bellii. Our serological results showed that dogs are important sentinels for the presence of R. rickettsii in areas where the tick A. aureolatum is the main vector of Brazilian spotted fever.

scholarly journals Epidemiological aspects of the Brazilian spotted fever: serological survey of dogs and horses in an endemic area in the State of São Paulo, Brazil

1996 ◽  
Vol 38 (6) ◽  
pp. 427-430 ◽  
Author(s):  
Elba R.S. de Lemos ◽  
Raimundo D. Machado ◽  
José R. Coura ◽  
Maria A.A.M. Guimarães ◽  
Nelson Chagas
Keyword(s):  
Endemic Area ◽  
Spotted Fever ◽  
Domestic Animals ◽  
Sao Paulo ◽  
Spotted Fever Group ◽  
São Paulo ◽  
Serological Survey ◽  
Serum Samples ◽  
Blood Samples ◽  
Brazilian Spotted Fever

In order to obtain information on Brazilian spotted fever, a study in domestic animals was performed in the County of Pedreira, State of São Paulo, Brazil, where 17 human cases had been notified. Serum samples obtained from animals were tested by indirect immunofluorescence for detectable antibodies to spotted fever-group rickettsiae. Seropositivity was revealed in 12 (36.4%) of 33 dogs and seven (77.8%) of nine horses from the endemic area. For comparison, blood samples from dogs and horses from non endemic area were tested and four (12.9%) of 31 dogs and three (27.3%) of 11 horses were positive. The highest titers of antibodies by IFA (IgG > 1:1024) were found only in three dogs and six horses from endemic area. The results suggest that dogs as horses may serve as environmental sentinels for estabilishing the prevalence of foci of spotted fever in Brazil.

Brazilian spotted fever: A spatial analysis of human cases and vectors in the state of São Paulo, Brazil

2020 ◽  
Vol 67 (6) ◽  
pp. 629-636
Author(s):  
Claudia Mello Ribeiro ◽  
Veruska Maia Costa ◽  
Jonas Lotufo Brant Carvalho ◽  
Rodrigo Guerrero Mendes ◽  
Paula Andrea de Santis Bastos ◽  
...  
Keyword(s):  
Spatial Analysis ◽  
Spotted Fever ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Brazilian Spotted Fever

scholarly journals Epidemiological aspects of the Brazilian spotted fever: seasonal activity of ticks collected in an endemic area in São Paulo, Brazil

1997 ◽  
Vol 30 (3) ◽  
pp. 181-185 ◽  
Author(s):  
Elba R.S. de Lemos ◽  
Raimundo D. Machado ◽  
José R. Coura ◽  
Maria A.A. Guimarães ◽  
Nicolau M. Serra Freire ◽  
...  
Keyword(s):  
Endemic Area ◽  
Spotted Fever ◽  
Rhipicephalus Sanguineus ◽  
Sao Paulo ◽  
Boophilus Microplus ◽  
Seasonal Activity ◽  
São Paulo ◽  
Amblyomma Triste ◽  
Brazilian Spotted Fever ◽  
One Year

Ticks were collected from vegetation and animals at monthly intervals during one year (1993-1994) in an endemic area of Brazilian spotted fever in the County of Pedreira, State of São Paulo. Six species of ticks were identified Amblyomma cajennense, Amblyomma cooperi, Amblyomma triste, Anocentor nitens, Rhipicephalus sanguineus and Boophilus microplus. Only the first species was sufficiently numerous to permit a quantitative study with seasonal activity, although the distribution and source of capture of other species were observed and are reported. This information is correlated with the epidemiology of tick-borne rickettsiosis.

scholarly journals Detection of Brazilian spotted fever infection by polymerase chain reaction in a patient from the state of São Paulo

2005 ◽  
Vol 100 (3) ◽  
pp. 277-279 ◽  
Author(s):  
Elvira Maria Mendes Nascimento ◽  
Flávia de Sousa Gehrke ◽  
Rosa Amélia Maldonado ◽  
Silvia Colombo ◽  
Luiz Jacintho da Silva ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Spotted Fever ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Chain Reaction ◽  
Brazilian Spotted Fever ◽  
Polymerase Chain

scholarly journals Brazilian spotted fever serological investigation among equids at the Guarapiranga Dam area in the city of São Paulo, Brazil

2019 ◽  
Vol 56 (4) ◽  
pp. e158601
Author(s):  
Jonas Moraes Filho ◽  
Amanda Oliveira de Sousa ◽  
Tania Regina Vieira de Carvalho ◽  
Marcelo Bahia Labruna
Keyword(s):  
Metropolitan Area ◽  
Tick Species ◽  
Endemic Area ◽  
Spotted Fever ◽  
Sao Paulo ◽  
The Other ◽  
Spotted Fever Group ◽  
São Paulo ◽  
Rickettsia Species ◽  
Brazilian Spotted Fever

The Guarapiranga Dam region, in the metropolitan area of São Paulo, has been an endemic area for Brazilian spotted fever (BSF), a tick-borne disease caused by the bacterium Rickettsia rickettsii. In this particular area, R. rickettsii is known to be transmitted to humans by Amblyomma aureolatum, a typical dog tick that is not associated with horses. In other BSF-endemic areas, R. rickettsii transmission is associated with Amblyomma sculptum, a tick species that typically infest capybaras and horses. The Guarapiranga Dam bears abundant populations of capybaras and horses; however, since nothing is known about a possible cycle of transmission of R. rickettsii by A. sculptum in this area, this study evaluated such transmission by performing a serosurvey of horses living in the Guarapiranga Dam region. A total of 206 equids living in the margins of the Guarapiranga Dam were serologically tested for antibodies reactive to five Rickettsia species, four of the spotted fever group (R. rickettsii, R. parkeri, R. amblyommatis, R. rhipicephali) and one basal group species, R. bellii. Overall, 171 (83%) equids reacted positively to at least one Rickettsia species. A total of 160 (78%), 123 (60%), 80 (39%), 72 (35%), and 71 (34%), equid sera reacted to R. bellii, R. rickettsii, R. parkeri, R. rhipicephali, and R. amblyommatis, respectively, with endpoint titers ranging from 64 to 1024 for R. bellii, and 64 to 512 for the remaining four Rickettsia species. Endpoint titers to R. bellii (median: 256) was significantly higher (P<0.05) than the endpoint titers to the other four Rickettsia species, for which the median values varied from 64 to 128. A total of 65 (32%) equid sera showed endpoint titers to R. bellii at least 4-fold higher than those to any of the other four antigens, indicating that they have been exposed to R. bellii or a very closely related species. Our results provide serological evidence that the sampled equids were not frequently exposed to R. rickettsii-infected ticks. Since horses are a highly suitable sentinel for R. rickettsii transmission by A. sculptum, we conclude that this tick species has no epidemiological role in the transmission of R. rickettsii in the BSF-endemic area of the Guarapiranga Dam in the metropolitan area of São Paulo Municipality.

Spotted fever in Brazil: a seroepidemiological study and description of clinical cases in an endemic area in the state of São Paulo.

2001 ◽  
Vol 65 (4) ◽  
pp. 329-334 ◽  
Author(s):  
E R de Lemos ◽  
R C Ravagnani ◽  
S R Zaki ◽  
T L Ferebee ◽  
F C Ferreira ◽  
...  
Keyword(s):  
Endemic Area ◽  
Spotted Fever ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Clinical Cases

scholarly journals Rickettsia Species Infecting Amblyomma cooperi Ticks from an Area in the State of Sao Paulo, Brazil, Where Brazilian Spotted Fever Is Endemic

2004 ◽  
Vol 42 (1) ◽  
pp. 90-98 ◽  
Author(s):  
M. B. Labruna ◽  
T. Whitworth ◽  
M. C. Horta ◽  
D. H. Bouyer ◽  
J. W. McBride ◽  
...  
Keyword(s):  
Spotted Fever ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Rickettsia Species ◽  
Brazilian Spotted Fever
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