OCORRÊNCIA DE ANTICORPOS anti-Neospora caninum EM VACAS LACTANTES DO MUNICÍPIO DE ARAGUAÍNA, ESTADO DO TOCANTINS, BRASIL

Martins, Nekita Évely Ximenes; Freschi, Carla Roberta; Baptista, Francisco; Machado, Rosangela Zacarias; Freitas, Fagner Luiz da Costa; Almeida, Katyane de Sousa

doi:10.5216/rpt.v40i3.15973

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…It is important to note that lower cut-offs may result in an increased number of false-positive samples. Although there are debates about the ideal cut-off for the diagnosis of anti- T. gondii positivity in cattle, the most commonly used threshold is 1:200, which is considered more reliable [ 31 , 32 , 33 , 34 ].…”

Section: Discussionmentioning

confidence: 99%

Seropositivity of Anti-Toxoplasma gondii and Anti-Neospora caninum Antibodies in Cattle Intended for Human Consumption in an Amazonian Area of North Brazil

et al. 2023

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Toxoplasma gondii and Neospora caninum are obligate intracellular intestinal coccidia distributed worldwide, and are causative agents of toxoplasmosis and neosporosis, respectively. The aim of this study was to evaluate the prevalence of anti-T. gondii and anti-N. caninum antibodies and the factors associated with infections in beef cattle intended for human consumption in an Amazonian area of North Brazil. We collected blood samples of 387 cattle from 50 herds located in different municipalities of the State of Rondônia. An epidemiological questionnaire was distributed to farmers, with regard to nutritional, sanitary and reproductive herd management. The samples were identified, refrigerated and sent for serological analyses via IFAT (Immunofluorescent Antibody Test). Among the 387 analyzed animals, 91 (23.5%; CI 95%: 18.8–27.2) were positive for anti-T. gondii antibodies, with titers varying from 1:64 (75.8%) to 1:512 (2.2%). For anti-N. caninum antibodies, only four animals (1%; CI 95%: 0–2.7) were positive, with titers ranging from 1:400 (50%) to 1:1600 (25%). We observed a significant rate of anti-T. gondii antibodies in the variables “pure breed” and “contact with free-range chickens” (p < 0.2). There were no risk factors associated with the presence of anti-T. gondii or anti-N. caninum antibodies. In conclusion, there was a high prevalence of anti-T. gondii antibodies in beef cattle intended for human consumption in the State of Rondônia, Brazil, and a low prevalence of anti-N. caninum antibodies. Longitudinal studies can better elucidate the cause of these prevalence levels and how they could be better prevented and controlled.

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Section: Discussionmentioning

confidence: 99%

Seropositivity of Anti-Toxoplasma gondii and Anti-Neospora caninum Antibodies in Cattle Intended for Human Consumption in an Amazonian Area of North Brazil

et al. 2023

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“…Several studies have been conducted in different regions of Brazil to detect anti-N. caninum IgG antibodies in cattle, whose prevalence ranges from 9.1% to 97.2% (Hasegawa et al, 2004;Vianna et al, 2008;Andreotti et al, 2010;Amaral et al, 2012;Silva et al, 2017). In the Amazon region, N. caninum infection has been described in the states of Pará (Minervino et al, 2008;Silva et al, 2017), Rondônia (Aguiar et al, 2006;Boas et al, 2015) and Tocantins (Martins et al, 2011), with prevalence rates varying from 10.4% to 52%. However, there are no seroepidemiological studies of N. caninum infection in the state of Amazonas, so there is a gap in information about herd health and factors associated with infection in this region of the country.…”

Section: Introductionmentioning

confidence: 99%

Neospora caninum infection in cattle in the state of Amazonas, Brazil: seroprevalence, spatial distribution and risk factors

Filho

Ribeiro-Andrade

Santos

et al. 2021

Rev. Bras. Parasitol. Vet.

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Livestock in the Amazon has grown significantly and, although neosporosis in cattle has been reported worldwide, there is no information about N. caninum in production systems in the state of Amazonas. The objective of this study was to determine the prevalence of anti-Neospora caninum antibodies in cattle, their spatial distribution and the risk factors associated with N. caninum infection in the state of Amazonas. Questionnaires were applied to farmers to assess risk factors associated with N. caninum infection. Blood samples were collected from 1,073 animals on 47 farms in 33 municipalities in the four Amazonian subpopulations. IgG anti-N.caninum antibodies were detected by the indirect fluorescence test, with a general prevalence of 30.2%, being seropositive in 43 farms (91.5%), with prevalence ranging from 2.2% to 69.2%. The highest number of high density points was found in subpopulation 3 (municipality of Apuí and other municipalities on the Madeira River and affluent). It was concluded that N. caninum is present with high seroprevalence values, when compared to other cattle producing states in the Amazon region of Brazil. The identified factors can be used as risk indicators so that control measures can be implemented to prevent infection by N. caninum in these herds.

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OCORRÊNCIA DE ANTICORPOS anti-Neospora caninum EM VACAS LACTANTES DO MUNICÍPIO DE ARAGUAÍNA, ESTADO DO TOCANTINS, BRASIL

Cited by 2 publications

References 15 publications

Seropositivity of Anti-Toxoplasma gondii and Anti-Neospora caninum Antibodies in Cattle Intended for Human Consumption in an Amazonian Area of North Brazil

Seropositivity of Anti-Toxoplasma gondii and Anti-Neospora caninum Antibodies in Cattle Intended for Human Consumption in an Amazonian Area of North Brazil

Neospora caninum infection in cattle in the state of Amazonas, Brazil: seroprevalence, spatial distribution and risk factors

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