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Antibodies against Apicomplexa protozoa and absence sarcocysts in heart tissues from horses in southern Brazil

Luiza Pires Portella et al · Colégio Brasileiro de Parasitologia Veterinária

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Author / responsible party
Luiza Pires Portella et al
Publisher
Colégio Brasileiro de Parasitologia Veterinária
ISSN
1984-2961
ISSN
1984-2961
Language
English

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Abstract Sarcocystis spp., Neospora spp., and Toxoplasma gondii are Apicomplexa protozoa that can infect horses. This study aimed to investigate the occurrence of antibodies against Sarcocystis spp., Neospora spp., and T. gondii in horses slaughtered in southern Brazil. The presence of histological lesions, tissue cysts, and Sarcocystis spp. DNA in the hearts of these horses was also investigated. A total of 197 paired serum and heart samples were evaluated by serology and direct microscopic examination; 50 of these samples were subjected to histopathological and PCR analyses. Antibodies against at least one of the protozoa were detected in 146 (74.1%) of the serum samples. The frequencies of positive serology were: 36% (71/197) against Sarcocystis spp., 39.1% (77/197) against Neospora spp., and 47.2% (93/197) against T. gondii. No cysts, Sarcocystis spp. DNA, or histopathological lesions were observed in myocardial tissue samples. The frequencies of antibody seropositivity against Sarcocystis spp., Neospora spp., and T. gondii showed that horses are frequently infected by these parasites in southern Brazil. The absence of sarcocysts in horse tissues is compatible with their role as aberrant/accidental hosts in the life cycle of Sarcocystis spp..

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APA 7

al, L. P. P. E. (s. f.). Antibodies against Apicomplexa protozoa and absence sarcocysts in heart tissues from horses in southern Brazil. https://doi.org/10.1590/s1984-29612016068

MLA

al, Luiza Pires Portella et. "Antibodies against Apicomplexa protozoa and absence sarcocysts in heart tissues from horses in southern Brazil.". https://doi.org/10.1590/s1984-29612016068.

Chicago

al, Luiza Pires Portella et. s. f. "Antibodies against Apicomplexa protozoa and absence sarcocysts in heart tissues from horses in southern Brazil.". https://doi.org/10.1590/s1984-29612016068.

Harvard

al, L. P. P. E. s. f, Antibodies against Apicomplexa protozoa and absence sarcocysts in heart tissues from horses in southern Brazil, Colégio Brasileiro de Parasitologia Veterinária, available at: https://doi.org/10.1590/s1984-29612016068 [Accessed 10 Aug. 2026].

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Title
Antibodies against Apicomplexa protozoa and absence sarcocysts in heart tissues from horses in southern Brazil
Author / contributors
Luiza Pires Portella et al
Publisher
Colégio Brasileiro de Parasitologia Veterinária
ISSN
1984-2961
ISSN
1984-2961
Language
English

Subjects

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Accidental hosts; epidemiology; Sarcocystis spp.; Neospora spp.; Toxoplasma gondii
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