2017
DOI: 10.1590/s1984-29612017046
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Genetic diversity of piroplasmids species in equids from island of São Luís, northeastern Brazil

Abstract: Equine piroplasmosisis, a tick-borne disease caused by the intra-erythrocytic protozoans Babesia caballi and Theileria equi, has economic importance due to the international trade and the increased movement of horses all over the world. The goal of this study was to evaluate the occurrence of phylogenetic diversity of T. equi and B. caballi genotypes among infected equids from São Luís Island, state of Maranhão, northeastern Brazil. Between December of 2011 and June of 2012, EDTA-blood and serum samples were c… Show more

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Cited by 20 publications
(15 citation statements)
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“…The ELISA assay performed in this study revealed that, among the seroreactive horses, 34.9% tested positive for T. equi and 27.2% for B. caballi. These findings are consistent with those of two other studies conducted recently in northeastern Brazil, using ELISA, the first of which reported finding 43.5% of animals positive for T. equi and 7.7% for B. caballi, while the second study found 38.1% positive for T. equi and 18.6% for B. caballi (BRAGA et al, 2017;NOGUEIRA et al, 2017). In Paraíba, also in the country's northeastern region, a study using IFA found that 59.6% of horses were seroreactive to T. equi (FERREIRA et al, 2016).…”
Section: Discussionsupporting
confidence: 92%
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“…The ELISA assay performed in this study revealed that, among the seroreactive horses, 34.9% tested positive for T. equi and 27.2% for B. caballi. These findings are consistent with those of two other studies conducted recently in northeastern Brazil, using ELISA, the first of which reported finding 43.5% of animals positive for T. equi and 7.7% for B. caballi, while the second study found 38.1% positive for T. equi and 18.6% for B. caballi (BRAGA et al, 2017;NOGUEIRA et al, 2017). In Paraíba, also in the country's northeastern region, a study using IFA found that 59.6% of horses were seroreactive to T. equi (FERREIRA et al, 2016).…”
Section: Discussionsupporting
confidence: 92%
“…Serological studies on B. caballi and T. equi have been conducted in the south, southeast and central-west regions of Brazil, which have revealed B. caballi prevalence rates varying from 18 to 90% (BARBOSA et al, 1995;HEUCHERT et al, 1999;HEIM et al, 2007;KERBER et al, 2009;VIEIRA et al, 2013;NOGUEIRA et al, 2017;BRAGA et al, 2017) and T. equi prevalence rates from 17 to 100% (TENTER & FRIEDHOFF, 1986;BARBOSA et al, 1995;RIBEIRO et al, 1999;HEUCHERT et al, 1999;XUAN et al, 2001;HEIM et al, 2007;GOLYNSKI et al, 2008;KERBER et al, 1999KERBER et al, , 2009BALDANI et al, 2010;SALVAGNI et al, 2010;VIEIRA et al, 2013;PROCHNO et al, 2014;VIEIRA et al, 2015VIEIRA et al, , 2018FERREIRA et al, 2016;GUIMARÃES et al, 2016;BRAGA et al, 2017;SCHEIN et al, 2018). However, such studies have rarely been carried out in northeastern Brazil.…”
Section: Introductionmentioning
confidence: 99%
“…Intraspecific analysis of the sequences obtained from equids of different ecoregions in the state of Mato Grosso showed 1.95% sequence divergence for B. caballi and 2.99% for T. equi. Studies based on ribosomal (18S) genes demonstrated variability between 0.5% and 2.1% for T. equi, allowing the segregation into different genotypes (BRAGA et al, 2017;PECKLE et al, 2018).…”
Section: Discussionmentioning
confidence: 99%
“…Within South America, the disease is readily identified in all regions, except for the southernmost areas of Chile and Argentina (WISE et al, 2013). In Brazil, previous studies using serological methods have shown that equine piroplasmosis is endemic, with prevalence rates varying from 19.4% to 100% (KERBER et al, 1999;HEIM et al, 2007;KERBER et al, 2009;BALDANI et al, 2010;SANTOS et al, 2011;MACHADO et al, 2012;TORRES et al, 2012;VIEIRA et al, 2013;PROCHNO et al, 2014;FERREIRA et al, 2016;GUIMARÃES et al, 2016;BRAGA et al, 2017).…”
Section: Introductionmentioning
confidence: 99%
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