Frequency of antibodies against Sarcocystis neurona and Neospora caninum in domestic cats in the state of Bahia, Brazil

Meneses, Íris Daniela Santos de; Ribeiro-Andrade, Müller; Uzêda, Rosângela Soares; Bittencourt, Marta Vasconcelos; Lindsay, David S.; Gondim, Luís Fernando Pita

doi:10.1590/s1984-29612014080

Cited by 13 publications

(5 citation statements)

References 30 publications

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“…However, the frequency of antibodies against Neospora spp. was similar to that reported by Sousa et al (2014) in Mato Grosso do Sul (6.6%; 10/151), by Lima et al (2018) on the Island of Fernando de Noronha (3.11%; 8/257), and by Meneses et al (2014) in Bahia (2.9%; 8/272). Therefore, the percentage of frequency of Neospora spp.…”

Section: Regardingsupporting

confidence: 90%

“…Only two animals had titers above the 1:25 cutoff, demonstrating, in addition to the small number of infected animals, a low rate of seroconversion, corroborating the results of another study (Sedlák, Bartova, & Machacova, 2014). According to Meneses et al (2014) and Feitosa et al (2014), natural infections in cats by Neospora spp. have never been reported, which could suggest low seroconversion or resistance to the pathogen, despite reports of experimental infection in immunosuppressed animals.…”

Section: Regardingsupporting

confidence: 81%

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Antibody frequency for Toxoplasma gondii and Neospora spp. in domiciliated and stray cats from Araguaína, Tocantins, Eastern Amazonia

Ribeiro

Reis

Sousa

et al. 2022

Semina: Ciênc. Agrár.

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Toxoplasma gondii and Neospora spp. are protozoa that have a significant impact on animal health due to the diseases they cause in domestic and wild animals. The aim of the present study was to investigate the presence of antibodies against T. gondii and Neospora spp. in cats from northern Brazil. Serum samples were collected from 180 cats in the municipality of Araguaína, Tocantins and used to evaluate the presence of anti-T. gondii and anti-Neospora spp. antibodies using the indirect fluorescent antibody test, with a cutoff of 1:64 and 1:25, respectively. The association between infection and individual animal characteristics (age, sex, origin, breed, and clinical signs) was tested using univariate analysis, followed by multivariate logistic regression. We found that 48.3% (87/180) of the animals had anti-T. gondii (95% CI: 40.8%–55.90%) and 3.9% (7/180) had anti-Neospora spp. (95% CI: 1.6%–7.8%) antibodies. There was no association between age, sex, breed origin, clinical signs, and seropositivity for T. gondii. Cats of defined breeds were more likely to be infected by Neospora spp. (OR = 10.7). Therefore, we found a high rate of seropositivity for T. gondii and a high rate of occurrence of Neospora infections in cats from the Araguaína region. The exposure of the feline population to the studied coccidia indicates the need to monitor the feline population for these infections and underscores the importance of effective sanitary measures against such pathogens.

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Section: Regardingsupporting

confidence: 90%

Section: Regardingsupporting

confidence: 81%

Antibody frequency for Toxoplasma gondii and Neospora spp. in domiciliated and stray cats from Araguaína, Tocantins, Eastern Amazonia

Ribeiro

Reis

Sousa

et al. 2022

Semina: Ciênc. Agrár.

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“…shed by opossums were seropositive. Although seropositivity was similar in these two studies, Koch et al (2019) obtained a maximum titer of 100, while Meneses et al (2014) observed 800 as the maximum titer (Table 3). As in dogs, no association with neurological signs was reported for the seropositive cats.…”

Section: /22mentioning

confidence: 57%

“…It is worth mentioning that all the cats tested were from urban areas and they probably had lower exposure to S. neurona sporocysts than cats from rural areas. Subsequently, two studies using IFAT found that 4% (Meneses et al, 2014) and 7% (Koch et al, 2019) of the cats References: SAT: Sarcocystis agglutination test; IFAT: Indirect Fluorescent Antibody Test.…”

Section: Sarcocystis Neurona Infection or Exposure In Domestic Carnivores And In Wildlifementioning

confidence: 99%

Sarcocystis neurona and related Sarcocystis spp. shed by opossums (Didelphis spp.) in South America

Gondim

Soares

Moré

et al. 2021

Rev. Bras. Parasitol. Vet.

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Protozoan parasites of the genus Sarcocystis are obligatory heteroxenous cyst-forming coccidia that infect a wide variety of animals and encompass approximately 200 described species. At least four Sarcocystis spp. (S. falcatula, S. neurona, S. lindsayi and S. speeri) use opossums (Didelphis spp.) as definitive hosts, and two of them, S. neurona and S. falcatula, are known to cause disease in horses and birds, respectively. Opossums are restricted to the Americas, but their distribution in the Americas is heterogeneous. Five Didelphis spp. are distributed in South America (D. aurita, D. albiventris, D. marsupialis, D. imperfecta and D. pernigra) whereas just one opossum species (D. virginiana) is found in North America. Studies conducted in the last decades show that Sarcocystis spp., derived from South American Didelphis spp., have biological and genetic differences in relation to Sarcocystis spp. shed by the North American opossum D. virginiana. The aim of this review was to address the peculiar scenario of Sarcocystis species shed by South American opossums, with a special focus on diagnosis, epidemiology, and animal infections, as well as the genetic characteristics of these parasites.

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“…Several reports on S. neurona infections or exposure in Brazilian animals have been conducted using North American strains of the parasite (39)(40)(41)(42)(43). It is worth to note that S. neurona antigen derived from Brazilian isolates of the parasite is not available for serological tests.…”

Section: Discussionmentioning

confidence: 99%

Reactivity of Horse Sera to Antigens Derived From Sarcocystis falcatula–Like and Sarcocystis neurona

et al. 2020

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Sarcocystis neurona and Sarcocystis falcatula are protozoan parasites endemic to the Americas. The former is the major cause of equine protozoal myeloencephalitis, and the latter is associated with pulmonary sarcocystosis in birds. The opossum Didelphis virginiana is the definitive host of these parasites in North America. Four Didelphis species are found in Brazil, and in most reports in this country, Sarcocystis species shed by opossums have been classified as S. falcatula-like. It is unknown whether reports on S. neurona-seropositive horses in Brazil are also derived from exposure of horses to S. falcatula-like. The aim of this study was to test the sera reactivity of 409 horses in Brazil using antigens derived from a Brazilian strain of S. falcatula-like (Sarco-BA1) and from a North American strain of S. neurona (SN138). Samples were examined by immunofluorescent antibody tests (IFATs) at start dilutions of 1:20, and a selected number of samples was tested by Western blot (WB). Sera from 43/409 (10.5%) horses were reactive to S. falcatula-like and 70 of 409 (17.1%) were reactive to S. neurona antigen; sera from 25 animals (6.1%) were positive for both parasites by IFAT. A poor agreement was observed between the two employed IFATs (κ = 0.364), indicating that horses were exposed to more than one Sarcocystis species. Horse sera evaluated by WB consisted of four sera reactive to S. falcatula-like by IFAT, six sera positive to S. neurona by IFAT, two sera that tested negative to both parasites by IFAT, and a negative control horse serum from New Zealand. Proteins in the range of 16 and 30 kDa were recognized by part of IFAT-positive sera using both antigen preparations. We concluded that Brazilian horses are exposed to distinct Sarcocystis species that generate different serological responses in exposed animals. Antigens in the range of 16 and 30 kDa are probably homologous in the two parasites. Exposure of the tested horses to other Sarcocystis species, such as Sarcocystis lindsayi, Sarcocystis speeri, and Sarcocystis fayeri, or Sarcocystis bertrami cannot be excluded in the current study.

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Frequency of antibodies against Sarcocystis neurona and Neospora caninum in domestic cats in the state of Bahia, Brazil

Cited by 13 publications

References 30 publications

Antibody frequency for Toxoplasma gondii and Neospora spp. in domiciliated and stray cats from Araguaína, Tocantins, Eastern Amazonia

Antibody frequency for Toxoplasma gondii and Neospora spp. in domiciliated and stray cats from Araguaína, Tocantins, Eastern Amazonia

Sarcocystis neurona and related Sarcocystis spp. shed by opossums (Didelphis spp.) in South America

Reactivity of Horse Sera to Antigens Derived From Sarcocystis falcatula–Like and Sarcocystis neurona

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