Soroprevalência de anticorpos contra Rickettsia spp. do grupo febre maculosa em equinos de haras no Norte do Paraná, Brasil

Katia Tamekuni; Roberta dos Santos Toledo; Mauro de Freitas Silva Filho; Valeska Bender Haydu; Richard Campos Pacheco; José Henrique Cavicchioli; Marcelo Bahia Labruna; John Stephen Dumler; Odilon Vidotto

doi:10.1590/s1984-29612010000400014

Soroprevalência de anticorpos contra Rickettsia spp. do grupo febre maculosa em equinos de haras no Norte do Paraná, Brasil

Translated title of the contribution: Serosurvey of antibodies against spotted fever group Rickettsia spp. in horse farms in Northern Paraná, Brazil

Katia Tamekuni, Roberta dos Santos Toledo, Mauro de Freitas Silva Filho, Valeska Bender Haydu, Richard Campos Pacheco, José Henrique Cavicchioli, Marcelo Bahia Labruna, John Stephen Dumler, Odilon Vidotto

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Brazilian spotted fever (BSF) is an emerging disease most likely caused by Rickettsia rickettsii. The objective of the present study was to estimate the seroprevalence of BSF rickettsia infections in equines from six horse farms located in Londrina County, Paraná, Southern Brazil. Six owners of horse farms situated in Cambé, Santa Fé, Guaraci and Londrina municipalities participated in the study. All farms were located in areas where BSF has not been reported. A total of 273 horses were sampled and their sera were tested by indirect Immunofluorescence assay (IFA) using R. rickettsii and R. parkeri antigens. Titers equal to and greater than 64 were considered positive. Of 273 sera tested, 15 (5.5%) reacted to R. rickettsii and 5 (1.8%) to R. parkeri. Five out of the six farms studied revealed seropositive animals and seropositivity rate ranged from 0 to 13%. The titers ranged from 64 to 512, and four samples had a titer of 512. Nine animals reacted to R. rickettsii with titers four-fold higher than those for R. parkeri. These results suggest that horses in Northern Paraná may have been exposed to rickettsiae identical or closely related to R. rickettsii.

Translated title of the contribution	Serosurvey of antibodies against spotted fever group Rickettsia spp. in horse farms in Northern Paraná, Brazil
Original language	Portuguese
Pages (from-to)	259-261
Number of pages	3
Journal	Revista Brasileira de Parasitologia Veterinaria
Volume	19
Issue number	4
DOIs	https://doi.org/10.1590/s1984-29612010000400014
State	Published - 2010
Externally published	Yes

Keywords

Amblyomma spp.
Brazilian spotted fever
Horse farms
Rickettsia spp.

ASJC Scopus subject areas

Parasitology
General Veterinary

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10.1590/s1984-29612010000400014

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Tamekuni, K., dos Santos Toledo, R., de Freitas Silva Filho, M., Haydu, V. B., Pacheco, R. C., Cavicchioli, J. H., Labruna, M. B., Dumler, J. S., & Vidotto, O. (2010). Soroprevalência de anticorpos contra Rickettsia spp. do grupo febre maculosa em equinos de haras no Norte do Paraná, Brasil. Revista Brasileira de Parasitologia Veterinaria, 19(4), 259-261. https://doi.org/10.1590/s1984-29612010000400014

Tamekuni, K, dos Santos Toledo, R, de Freitas Silva Filho, M, Haydu, VB, Pacheco, RC, Cavicchioli, JH, Labruna, MB, Dumler, JS & Vidotto, O 2010, 'Soroprevalência de anticorpos contra Rickettsia spp. do grupo febre maculosa em equinos de haras no Norte do Paraná, Brasil', Revista Brasileira de Parasitologia Veterinaria, vol. 19, no. 4, pp. 259-261. https://doi.org/10.1590/s1984-29612010000400014

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abstract = "Brazilian spotted fever (BSF) is an emerging disease most likely caused by Rickettsia rickettsii. The objective of the present study was to estimate the seroprevalence of BSF rickettsia infections in equines from six horse farms located in Londrina County, Paran{\'a}, Southern Brazil. Six owners of horse farms situated in Camb{\'e}, Santa F{\'e}, Guaraci and Londrina municipalities participated in the study. All farms were located in areas where BSF has not been reported. A total of 273 horses were sampled and their sera were tested by indirect Immunofluorescence assay (IFA) using R. rickettsii and R. parkeri antigens. Titers equal to and greater than 64 were considered positive. Of 273 sera tested, 15 (5.5%) reacted to R. rickettsii and 5 (1.8%) to R. parkeri. Five out of the six farms studied revealed seropositive animals and seropositivity rate ranged from 0 to 13%. The titers ranged from 64 to 512, and four samples had a titer of 512. Nine animals reacted to R. rickettsii with titers four-fold higher than those for R. parkeri. These results suggest that horses in Northern Paran{\'a} may have been exposed to rickettsiae identical or closely related to R. rickettsii.",

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AU - Tamekuni, Katia

AU - dos Santos Toledo, Roberta

AU - de Freitas Silva Filho, Mauro

AU - Haydu, Valeska Bender

AU - Pacheco, Richard Campos

AU - Cavicchioli, José Henrique

AU - Labruna, Marcelo Bahia

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AU - Vidotto, Odilon

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AB - Brazilian spotted fever (BSF) is an emerging disease most likely caused by Rickettsia rickettsii. The objective of the present study was to estimate the seroprevalence of BSF rickettsia infections in equines from six horse farms located in Londrina County, Paraná, Southern Brazil. Six owners of horse farms situated in Cambé, Santa Fé, Guaraci and Londrina municipalities participated in the study. All farms were located in areas where BSF has not been reported. A total of 273 horses were sampled and their sera were tested by indirect Immunofluorescence assay (IFA) using R. rickettsii and R. parkeri antigens. Titers equal to and greater than 64 were considered positive. Of 273 sera tested, 15 (5.5%) reacted to R. rickettsii and 5 (1.8%) to R. parkeri. Five out of the six farms studied revealed seropositive animals and seropositivity rate ranged from 0 to 13%. The titers ranged from 64 to 512, and four samples had a titer of 512. Nine animals reacted to R. rickettsii with titers four-fold higher than those for R. parkeri. These results suggest that horses in Northern Paraná may have been exposed to rickettsiae identical or closely related to R. rickettsii.

KW - Amblyomma spp.

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KW - Horse farms

KW - Rickettsia spp.

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Soroprevalência de anticorpos contra Rickettsia spp. do grupo febre maculosa em equinos de haras no Norte do Paraná, Brasil

Abstract

Keywords

ASJC Scopus subject areas

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