Chickens (Gallus domesticus) are natural intermediate hosts of Neospora caninum☆

Costa, Kattyanne de Souza; Santos, Sara Lima; Uzêda, Rosângela Soares; Pinheiro, Alexandre Moraes; Almeida, Maria Ângela Ornelas de; Araújo, Flábio R.; McAllister, Milton M.; Gondim, Luís Fernando Pita

doi:10.1016/j.ijpara.2007.10.008

Cited by 81 publications

(65 citation statements)

References 15 publications

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“…T. gondii infection has been extensively reported in birds, but only a few reports in backyard chickens showed their importance as hosts, which deserves further study (Tilahun et al, 2013). As for N. caninum, Costa et al (2008) and Martins et al (2011) found 23.5% and 39.5% positive serum samples in backyard chickens respectively, indicating significant exposure to this protozoan. These results are epidemiologically important because chickens are cosmopolitan animals consumed by many animal species, including dogs and cats which are the definitive hosts of those parasites (McAllister et al, 1998;Dubey, 2002).…”

Section: Resultsmentioning

confidence: 98%

“…Those birds feed on the ground and tissues of infected chickens are considered a source of infection of others animals, such as dogs and cats, allowing the life cycle of this protozoan to be completed (Costa et al, 2008;Dubey, 2009).…”

Section: Resultsmentioning

confidence: 99%

“…All samples were tested by indirect fluorescence antibody test (IFAT), for detection of T. gondii and N. caninum antibodies. The IFAT cut-off for T. gondii was 1:16 (Garcia et al, 2000) and 1:50 for N. caninum (Costa et al, 2008). The serum samples were diluted in phosphate buffered saline solution (PBS -0.1M phosphate, 0.33M NaCl, pH 7.2), and positive and negative chickens for both protozoa were used as controls.…”

Section: Methodsmentioning

confidence: 99%

“…T. gondii infections are prevalent in many avian species and can cause mortality in some species of birds (Dubey et al, 2010). N. caninum has been found in a few species of naturally-infected birds, and particularly in domestic chicken (Costa et al, 2008) and in some wild birds (Darwich et al, 2012). Chickens are intermediate hosts, especially those reared in backyard systems, where transmission occurs by the ingestion of oocysts from the soil that were shed by dogs and cats, which are the definitive hosts of N. caninum and T. gondii, respectively (Gondim, 2006;Dubey, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Toxoplasma Gondii and Neospora Caninum Antibodies in Backyard Chickens in Rio Grande do Sul, Brazil

Camillo

Cadore

Ferreira

et al. 2015

Rev. Bras. Cienc. Avic.

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Toxoplasma gondii and Neospora caninum are two intracellular apicomplexan protozoa with worldwide distribution, and are responsible for reproductive disorders in sheep and cattle. These protozoa may infect a wide variety of domestic and wild animals, including birds, and backyard chickens can be used as sentinels of their infection. Parasites investigation in backyard chickens may be useful for the evaluation of environmental contamination with oocysts, of the disease cycle, and of risk factors associated with public health. The aim of this study was establish the importance of backyard chickens as T. gondii and N. caninum hosts. A number of 137 serum samples were collected from chickens in 23 farms in Rio Grande do Sul State, Brazil, and tested for toxoplasmosis and neosporosis by indirect fluorescence antibody test (IFAT). Anti-Toxoplasma and anti-Neospora antibodies were detected in 20 (87%) farms. Total prevalence of T. gondii was 74.4% (102/137) and 36.5% (50/137) for N. caninum, while 12.4% (17/137) of the chickens were positive for both protozoa. The results show that backyard chicken can used as indicators of the presenced of the protozoa N. caninum and T. gondii, emphasizing yours importance in the public health. Considering the high prevalence of toxoplasmosis in backyard chickens in the region, control measures should be taken to prevent transmission of the infection to the animals and humans.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toxoplasma Gondii and Neospora Caninum Antibodies in Backyard Chickens in Rio Grande do Sul, Brazil

Camillo

Cadore

Ferreira

et al. 2015

Rev. Bras. Cienc. Avic.

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“…It is likely that these two variables would characterize smallholdings or family producers, where stray dogs would have easier access and would have a greater possibility of living together with reared hens, which they might eat because of the carnivorous and hunting habits inherent to domestic dogs. Domestic poultry may act as intermediate hosts for N. caninum (COSTA et al, 2008;MARTINS et al, 2011) and can easily become infected through their habit of frequently pecking at the ground where they live, thus ingesting sporulated oocysts of this coccid. It is possible that dogs become infected through ingesting tissue from these birds that are infected with the parasite (HEMPHILL; GOTTSTEIN, 2000).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of anti-Neospora caninum antibodiesin dogs in rural areas in Minas Gerais, Brazil

Bruhn

Figueiredo

Andrade

et al. 2012

Rev. Bras. Parasitol. Vet.

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The aim of this study was to determine the frequency of anti-Neospora caninum antibodies and risk factors associated with seropositivity in 240 dogs from rural areas of the Lavras, Belo Horizonte and Nanuque regions, state of Minas Gerais, Brazil. The indirect fluorescence antibody test (IFAT) with a cutoff of 50 was used to assess the frequency of seropositive dogs. The risk factor analysis was performed using the Chi-square test (χ 2 ) and multiple logistic regression. The frequency of seropositivity for N. caninum was 15% of the dogs (36/240). Presence of dogs without defined breed (p = 0.018; OR = 5.9) and presence of cattle on the farm (p = 0.053, OR = 4.3) were associated with N. caninum seropositivity. Dogs in the Nanuque region had higher seropositivity for N. caninum (29.9%) than did those in the Lavras (6.2%) and Belo Horizonte (2.2%) regions (p < 0.05). The presence of seropositive dogs in rural areas of Minas Gerais demonstrates the potential risk of horizontal transmission of N. caninum to cattle, especially from dogs without defined breed, which were four times more likely to be seropositive than purebred dogs were.Keywords: Neospora caninum, dogs, Minas Gerais, risk factors, IFAT. ResumoO objetivo deste estudo foi determinar a frequência de anticorpos anti-Neospora caninum e fatores de risco associados à soropositividade, em 240 cães de áreas rurais, nas regiões de Lavras, Belo Horizonte e Nanuque, Minas Gerais, Brasil. Foi utilizada a reação de imunofluorescência indireta (RIFI), com um ponto de corte igual a 50, para avaliar a frequência de cães soropositivos. A análise dos fatores de risco foi realizada pelo teste de Qui-quadrado (χ 2 ) e regressão logística múltipla. A frequência de cães soropositivos para N. caninum foi de 15% (36/240). A presença de cães sem raça definida (SRD) (p = 0,018; OR = 5,9) e bovinos na propriedade (p = 0,053; OR = 4,3) foi associada à soropositividade pelo N. caninum. A frequência de cães soropositivos foi mais elevada na região de Nanuque (29,9%), quando comparados aos das regiões de Lavras (6,2%) e Belo Horizonte (2,2%) (p < 0,05). A presença de cães soropositivos, em áreas rurais de Minas Gerais, demonstra o risco potencial da transmissão horizontal de N. caninum para os bovinos, especialmente os cães SRD, que apresentaram quatro vezes mais a chance de serem soropositivos em relação aos cães com raça definida.Palavras-chave: Neospora caninum, cães, Minas Gerais, fatores de risco, RIFI.Neosporosis is a disease caused by the protozoon Neospora caninum (Apicomplexa: Sarcocystidae) that may give rise to severe neuromuscular manifestations (DUBEY et al., 2007). Domestic dogs (Canis lupus familiaris) and wild dogs (C. lupus latrans, C. lupus dingo e C. lupus) can be considered to be the definitive hosts for N. caninum, and therefore they present a potential risk of transmission to herbivores. This parasite is an important cause of abortion among production animals, especially cattle (DUBEY; LINDSAY, 1996;McALLISTER et al., 1998;GONDIM et al., 2004;BJÖRKMAN et ...

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Infectious Agents

Estill

Scully

2014

Bovine Reproduction

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Chickens (Gallus domesticus) are natural intermediate hosts of Neospora caninum☆

Cited by 81 publications

References 15 publications

Toxoplasma Gondii and Neospora Caninum Antibodies in Backyard Chickens in Rio Grande do Sul, Brazil

Toxoplasma Gondii and Neospora Caninum Antibodies in Backyard Chickens in Rio Grande do Sul, Brazil

Occurrence of anti-Neospora caninum antibodiesin dogs in rural areas in Minas Gerais, Brazil

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