Issue |
Parasite
Volume 20, 2013
|
|
---|---|---|
Article Number | 20 | |
Number of page(s) | 5 | |
DOI | https://doi.org/10.1051/parasite/2013019 | |
Published online | 28 May 2013 |
Research Article
Seroprevalence and risk factors associated with ovine toxoplasmosis in Northeast Brazil
Séroprévalence et facteurs de risque associés à la toxoplasmose ovine dans le Nord-Est du Brésil
1
Departamento de Parasitologia, Instituto de Ciências Biológicas, UFMG, Belo Horizonte, MG, Brazil
2
Departamento de Microbiologia e Parasitologia, Centro de Biociências, UFRN, Natal, RN, Brazil
* Corresponding author: ricardovitor@icb.ufmg.br
Received:
26
December
2012
Accepted:
14
May
2013
Serum samples of 930 sheep were tested by ELISA to assess the prevalence of anti-Toxoplasma gondii antibodies and to identify risk factors associated with the presence of toxoplasmosis in two regions of Rio Grande do Norte (Northeast Brazil), with different climatic conditions. The overall estimated prevalence was 22.1%, with 26.3% and 17.8% positive sheep in Leste Potiguar and Central Potiguar regions, respectively. Among the positive sheep, 18.1% had low-avidity IgG antibodies, suggesting the occurrence of recent toxoplasmosis. The risk factors for toxoplasmosis in sheep were: presence of cats (odds ratio (OR) = 1.55; confidence interval (CI) 95% = 1.11–2.16), age of the animals, with adults presenting a greater chance of infection (OR = 2.44; CI 95% = 1.58–3.75), and the use of running water (OR = 1.61; CI 95% = 1.25–2.09), characterizing the existence of transmission by sporulated oocysts of T. gondii in the environment.
Résumé
Des échantillons de sérum de 930 moutons ont été analysés par le test ELISA dans le but d’évaluer la prévalence d’anticorps anti-Toxoplasma gondii et d’identifier les facteurs de risque associés à la présence de toxoplasmose chez les ovins dans deux régions de l’État de Rio Grande do Norte (Nord-Est du Brésil), ayant des conditions climatiques distinctes. La prévalence estimée était de 22.1 %, dont 26.3 % et 17.8 % de moutons positifs, respectivement, dans les régions Leste Potiguar et Central Potiguar. Chez les moutons positifs, 18,1 % ont présenté des anticorps IgG de basse-avidité, suggérant des événements récents de toxoplasmose. Les facteurs de risque associés à l’infection étaient : la présence de chats (rapport de cotes 1.55 ; intervalle de confiance 95 % 1.11-2.16), l’âge des animaux, les adultes ayant une plus grande chance d’infection (rc 2.44 ; ic 95 % 1.58-3.75), et l’utilisation d’eau courante (rc 1.61; ic 95 % 1.25-2.09), caractérisant ainsi l’existence de transmission par oocystes sporulés de T. gondii dans l’environnement.
Key words: Toxoplasma gondii / sheep / ELISA / seroprevalence
© M.M.C. Andrade et al., published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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