Prevalence of anti-Neospora caninum antibodies in cattle from the state of Mato Grosso do Sul, Brazil

Oshiro, Leandra Marla; Matos, Maria de Fátima Cepa; Oliveira, Jacqueline M. de; Monteiro, L.A.R.C.; Andreotti, Renato

doi:10.1590/s1984-29612007000300004

Cited by 27 publications

(23 citation statements)

References 27 publications

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“…The results of this study reinforce the information collected by Oshiro et al (2007) that showed a prevalence of 14.8% to neosporosis in cows and in cattle in Mato Grosso do Sul and identified abortion as a risk factor associated to neosporosis. To demonstrate the impact of disease on reproductive performance of heifers the significance of association between two qualitative variables was tested: the cases of abortion and seropositivity for neosporosis.…”

Section: Discussionsupporting

confidence: 87%

“…Serological tests to identify infected animals, may require a higher sensitivity, lower cut-off than should be suggested for the diagnosis of bovine abortion. In the state of Mato Grosso do Sul the epidemiological survey was carried out with the cutoff of 1:50 (OSHIRO et al, 2007;ANDREOTTI et al, 2010). For these reasons we defined a cut-off with a tendency to give greater sensitivity to the test (1:50).…”

Section: Discussionmentioning

confidence: 99%

“…Once installed, the disease is transmitted from mother to child possibly for several generations (DUBEY; SCHARES; ORTEGA-MORA, 2007). In Mato Grosso do Sul, serological tests showed the presence of Neosporosis in 30% of heifers , 29.5% of embryos recipient heifers of beef cattle raised in extensive regime (PAZ; LEITE; ROCHA, 2007) and Oshiro et al (2007) identified the presence of N. caninum in 14.9% of cows in the beef cattle herd of the state, where 69.8% of the herds studied showed the presence of Neosporosis, linking abortion as a risk factor associated with the disease.…”

Section: Introductionmentioning

confidence: 99%

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Economic assesment of neosporosis in beef cattle system performance with different technological levels

et al. 2011

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The objective of this study was to determine if there is economic losses caused by neoporosis by identifying the number of abortions occurred in beef cattle in the Pantanal region of Mato Grosso do Sul, which are associated with the disease, and then estimate the economic loss to the productive system. 1098 heifers were evaluated from breeding season to the birth of calves in relation to reproductive performance, and the serological diagnosis of neosporosis was performed. To estimate the economic loss it was chosen the projection of exploratory scenarios through simulation using the software Gerenpec/Embrapa. The output rate for heifers seropositive and seronegative to neosporosis was 28.24% and 50.12% respectively, showing a 44% reduction in the output rate of heifers seropositive to Neospora caninum. The evolution of the herd for a period of 10 years showed higher production of animals in the herd free of disease in three technology levels, with values of 7.3%, 7.1% and 8.7% in stages I, II and III respectively when compared to systems with the disease. By comparing the rate of revenue in the 10 th year of a system free of the disease with an actual observed income over the three levels of technology: the technological level to 14% revenue I, Level II and 21% of revenues to the level technological III 34% higher. Therefore, the study highlights the importance of rural business management geared towards forward-looking vision by identifying trends, behaviors and/or opportunities that will serve as sources for the development of strategic actions, and thus provide increased productivity of rural enterprises eg, methods of neosporosis control using strategies such as the disposal of positive animals. Key words: Heifers, neosporosis, abortion, economic loss DOI: 10.5433/1679 Abstract O objetivo deste trabalho foi verificar os prejuízos econômicos associados a neosporose em novilhas de gado de corte, na região do Pantanal Sul-matogrossense. Foram avaliadas 1098 novilhas da estação de reprodução ao nascimento dos bezerros em relação à performance reprodutiva e realizado o diagnóstico sorológico de neosporose. Para estimar a perda econômica foi escolhida a projeção de cenários exploratórios por meio da simulação utilizando o software Gerenpec/Embrapa. A taxa de desfrute para as novilhas soropositivas e soronegativas para neosporose foi de 28,24% e 50,12%, respectivamente, mostrando uma redução de 44% na taxa de desfrute de novilhas soropositivas para Neospora caninum. A evolução do rebanho para um período de 10 anos apresentou maior produção de animais para o rebanho livre da doença nos três níveis tecnológicos, com valores de 7,3%, 7,1% e 8,7% nos níveis I, II e III respectivamente quando comparados aos sistemas com a doença. Ao comparar o índice da receita no 10° ano de um sistema livre da doença com um sistema real observaram-se receitas superiores nos três níveis tecnológicos: para o nível tecnológico I receita de 14%, nível II receita de 21% e para o nível tecnológico III 34% maior. Portanto, o estudo destaca a ...

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Economic assesment of neosporosis in beef cattle system performance with different technological levels

et al. 2011

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“…With regard to sex, five males (4.0%) and five females (4.5%) were positive, and there was no statistically significant difference between the sexes, as was also described in the studies carried out by Oliveira et al (2004), Jesus et al (2006), Romanelli et al (2007), Benetti et al (2008) and Moraes et al (2008). Moreover, when this variable was subjected to univariate analysis (P = 0.859), there was no association with occurrences of anti-N. caninum antibodies, thus demonstrating that in this region, males and females can be equally stricken and are subject to the same risks of infection (BOAVENTURA et al, 2007;CUNHA FILHO et al, 2008).…”

Section: Introductionsupporting

confidence: 75%

Seroprevalence of antibodies to Neospora caninum in dogs in the state of Alagoas, Brazil

Sousa

Porto

Albuquerque

et al. 2012

Rev. Bras. Parasitol. Vet.

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This study investigated occurrences of antibodies to anti-Neospora caninum in dogs in the state of Alagoas, Brazil, and the risk factors associated with the infection. To investigate antibodies against N. caninum, an indirect immunofluorescence antibody test (IFAT) was used. To identify risk factors associated with infection by N. caninum, univariate analyses on variables of interest were conducted. The study analyzed 237 samples from dogs of both sexes and different breeds and ages, both from rural and from urban areas. Ten animals (4.2%) were seropositive: five (4.8%) from rural areas and five (3.8%) from urban areas. Regarding sex, five (4.0%) were male and five (4.5%) were female. In relation to breed, four animals of undefined breed and six of defined breed were positive. The ages of the seropositive animals ranged from two months to eleven years. Results show there are no significant associations between seropositivity and the variables analyzed. Results indicate neosporosis must be included in differential diagnosis of dog neurological disorders.Keywords: Neosporosis, dogs, epidemiology, diagnosis, IFAT. ResumoInvestigou-se a ocorrência de anticorpos anti-Neospora caninum em cães no Estado de Alagoas, Brasil e os fatores de risco associados à infecção. Para a pesquisa de anticorpos contra N. caninum empregou-se a Reação de Imunofluorescênica Indireta (RIFI). Para identificar os fatores de risco associados à infecção pelo N. caninum foi realizada análise univariada das variáveis de interesse. Foram analisadas 237 amostras de cães de ambos os sexos, diferentes raças e idades e procedentes de áreas urbanas e rurais. Obteve-se 10 (4,2%) animais soropositivos, sendo cinco (4,8%) de áreas rurais e cinco (3,8%) de áreas urbanas. Com relação ao sexo, cinco (4,0%) eram machos e cinco (4,5%) fêmeas. Quanto às raças foram positivos quatro animais de raças indefinidas e seis de raças definidas. As idades dos animais soropositivos variaram de dois meses a 11 anos. Os resultados da análise estatística revelaram não haver associação significativa entre a soropositividade e as variáveis analisadas. Os resultados indicam a necessidade de incluir a neosporose no diagnóstico diferencial das desordens neurológicas caninas.

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“…Among the six states, RJ had the lowest prevalence and MG the highest and dairy cattle had higher prevalence than beef cattle. In another large study from MS, N. caninum antibodies were found in cattle from 143 of 205 herds (IFAT 1:50); the cows were older than two years (OSHIRO et al, 2007). Overall seroprevalence was 14.9% (Table 4).…”

Section: Epidemiologymentioning

confidence: 93%

All about neosporosis in Brazil

Cerqueira‐Cézar

Calero‐Bernal

Dubey

et al. 2017

Rev. Bras. Parasitol. Vet.

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Neospora caninum is protozoan parasite with domestic and wild dogs, coyotes and grey wolves as the definitive hosts and many warm-blooded animals as intermediate hosts. It was cultivated and named in 1988. Neosporosis is a major disease of cattle and has no public health significance. Since 1990's N. caninum has emerged as a major cause of abortion in cattle worldwide, including in Brazil. N. caninum also causes clinical infections in several other animal species. Considerable progress has been made in understanding the biology of N. caninum and there are more than 200 papers on this subject from Brazil. However, most of the reports on neosporosis from Brazil are serological surveys. Overall, little is known of clinical neosporosis in Brazil, particularly cattle. The few reports pertain to sporadic cases of abortion with no information on epidemics or storms of abortion. The objective of the present review is to summarize all reports from Brazil and suggest topic for further research, including prevalence of N. caninum oocysts in soil or in canine feces, and determining if there are additional definitive hosts, other than the domestic dog. There is need for a national survey in cattle using defined parameters. Future researches should focus on molecular characterization of N. caninum strains, possibility of vaccine production and relationship between wildlife and livestock epidemiology.Keywords: Neospora caninum, neosporosis, domestic animals, wild animals, Brazil. ResumoNeospora caninum é um protozoário parasita que possui os canídeos domésticos e selvagens, coiotes e lobos cinzentos como hospedeiros definitivos e vários animais de sangue quente como hospedeiros intermediários. Foi cultivado e nomeado em 1988. A neosporose é uma das principais doenças em bovinos e não tem significância em saúde pública. Desde 1990, N. caninum tem emergido como uma das principais causas de aborto em bovinos em todo o mundo, inclusive no Brasil. N. caninum também causa infecções clínicas em várias outras espécies animais. Consideráveis avanços foram feitos na compreensão da biologia desse parasita e há mais de 200 trabalhos sobre o assunto no Brasil. No entanto, a maioria dos relatos de neosporose do Brasil são relacionados a sorologia. Em geral, pouco se sabe sobre a neosporose clínica no Brasil, particularmente em bovinos. Os poucos relatos referem-se a casos esporádicos de aborto sem informações sobre epidemias ou surtos de aborto. O objetivo da presente revisão é resumir todos os relatos sobre N. caninum no Brasil e sugerir tópicos para pesquisas futuras, incluindo a prevalência de oocistos de N. caninum no solo ou em fezes caninas e determinar se há hospedeiros definitivos adicionais, exceto o cão doméstico no país. Uma pesquisa nacional em bovinos usando parâmetros definidos seria de grande importância. Pesquisas futuras deveriam ser focadas na caracterização de cepas de N. caninum, possibilidade de produção de vacinas e a relação epidemiológica entre a vida selvagem e o gado.Palavras-chave: Neospora caninum, neospo...

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Prevalence of anti-Neospora caninum antibodies in cattle from the state of Mato Grosso do Sul, Brazil

Cited by 27 publications

References 27 publications

Economic assesment of neosporosis in beef cattle system performance with different technological levels

Economic assesment of neosporosis in beef cattle system performance with different technological levels

Seroprevalence of antibodies to Neospora caninum in dogs in the state of Alagoas, Brazil

All about neosporosis in Brazil

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