<i>Neospora</i>abortion in New Zealand cattle

Rn, Thornton; Ej, Thompson; Jp, Dubey

doi:10.1080/00480169.1991.35679

Cited by 100 publications

(48 citation statements)

References 11 publications

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“…Na segunda situação, onde é considerado o significativo número de abortamentos, quando utilizase a RIFI, a porcentagem encontrada é inferior às citadas por Reichel e Drake (1996) e Cox, Reichel e Griffiths (1998), porém superior às de Corbellini et al (2002). Na relação entre abortamento e RIFI, considerando-se diluições mínimas de 1:200, e abortamento versus ELISA, as porcentagens equivalem às citadas por Thorton, Thompson e Dubey (1991) e Thorton (1992) na Nova Zelândia, e por Onoda e Shirakawa (1997) e Okuda, Fukutomi e Yoshino (1997) no Japão. No entanto, LocatelliDittrich et al (2001), descrevem porcentagens superiores para associação de animais ELISAsoropositivos com abortamento.…”

Section: Resultsunclassified

Ocorrência de anticorpos de Neospora caninum em vacas leiteiras avaliados pelos métodos ELISA e RIFI no município de Avaré, SP

Sartor

Hasegawa

Canavessi³

et al. 2003

Sem. Ci. Agr.

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ResumoSoros de 521 vacas do município de Avaré, SP, foram analisados pelos métodos de reação de imunofluorescência indireta (RIFI) e teste imunoenzimático (ELISA) para a detecção de anticorpos contra Neospora caninum. As amostras reagentes para Neospora também foram submetidas à RIFI para Toxoplasma gondii. Pelo método de RIFI 15,9% das amostras foram positivas para N. caninum nas diluições de 1:200 a 1:1600 e pelo teste de ELISA 30,5% dos soros foram positivos. Das amostras positivas para ELISA e negativas para a RIFI 1:200, 46 foram reagentes na diluição de 1:160. Todas as 129 vacas positivas para RIFI nas diluições ≥ 1:160 também o foram para ELISA. Dos 44 abortamentos constatados, 14 (31,8%) e 18 (40,9%) vacas apresentaram título na RIFI ≥ 1:200 e ≥ 1:160, respectivamente, e 24 (54,5%) reagiram ao teste de ELISA. Dos 159 soros que reagiram para N. caninum nos testes de RIFI e/ou ELISA, apenas seis foram positivos para T. gondii pelo método de RIFI e, das 44 vacas com histórico de abortamentos, apenas uma apresentou anticorpos anti-Toxoplasma. Esses resultados sugerem a presença de N. caninum nos rebanhos estudados e sua relação com os abortamentos observados. Palavras-chave: Neosporose, bovinos, Apicomplexa. AbstractSera of 521 dairy cows from herds in Avaré County, SP were examined by indirect fluorescent-antibody test (IFAT) and enzyme-linked immunosorbent assay (ELISA) for detection of antibodies to Neospora caninum. The positive samples for Neospora were also tested for Toxoplasma gondii by IFAT. By using IFAT 15.9% of the samples reacted for N. caninum with dilution between 1:200 and 1: 1600. By using ELISA 30.5% were seropositive for Neospora. Of the samples that were positive to ELISA and negative to IFAT for antibodies titers of 1:200, 46 showed IFAT titers of 1:160. All 129 cows that were seropositive to IFAT with titers of 1:200 and 1:160 were also positive to ELISA. Out of 44 detected abortions, 14 (31.8%) and 18 (40.9%) cows had IFAT titers of ≥ 1:200 and ≥ 1:160, respectively, and 24 (54.5%) cows were positive to ELISA. Of the 159 seropositive samples to N. caninum to IFAT and/or ELISA, only six were positive to IFAT to T. gondii. Moreover, among the 44 cows with history of abortion, only one demonstrated antibodies to Toxoplasma. These results suggest the presence of N. caninum in the herds that were evaluated and the potential relationship with the observed abortions.

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Section: Resultsunclassified

Ocorrência de anticorpos de Neospora caninum em vacas leiteiras avaliados pelos métodos ELISA e RIFI no município de Avaré, SP

Sartor

Hasegawa

Canavessi³

et al. 2003

Sem. Ci. Agr.

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“…For New Zealand, reports with relevant information were able to be obtained from 12 230 publications, 11 for dairy cattle (Cox et al, 1998; Faria et al, 2010;Patitucci et al, 1999; 231 Pfeiffer et al, 2002;Reichel, 1998;Reichel and Pfeiffer, 2002;Schares et al, 1999; 232 Thobokwe and Heuer, 2004;Thornton et al, 1994;Thornton et al, 1991; Weston et al, 233 2005) (n= 6,636) and one for the beef industry (Tennent-Brown et al, 2000) (n=499). 234 11…”

Section: New Zealand 229mentioning

confidence: 99%

What is the global economic impact of Neospora caninum in cattle – The billion dollar question

Reichel

Ayanegui-Alcérreca

Gondim

et al. 2013

International Journal for Parasitology

423

281

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Graphical Abstract (for review) Click here to download high resolution image Bullet points A systematic review of literature conducted after Pubmed search for Neospora and cattle  Modelling after review suggests that the cost of N caninum globally exceeds one billion dollars  Approximately two thirds of the costs of N caninum are incurred by dairy industries world-wide  Analysis of the regional distribution of global costs of N caninum highlights the cattle industries of the North American as incurring two thirds of the overall global cost  At the farm level, costs only exceed US$ 2,000 in four countries Neospora caninum is regarded as one of the most important infectious causes of abortions in 20 cattle world-wide, yet the global economic impact of the infection has not been established. 21A systematic review of the economic impact of N caninum infections/abortions was 22 conducted, searching PubMed with the terms cattle and Neospora. This yielded 769 23 publications whose abstracts were screened for economically relevant information (e.g. 24 abortion prevalence and risk, serological prevalence). Further analysis was restricted to 25 countries with at least 5 relevant publications. In total, 99 studies (12.9%) from ten countries 26 contained data from the beef industry (25 papers (25.3%)) and 72 papers (72.8%) from the 27 dairy industry (with the remainder two papers (2.0%) describing general abortion statistics). 28The total annual cost of N caninum infections/abortions was estimated to range from a 29 median US $1.1 million in the New Zealand beef industry to an estimated median total of 30 US$ 546.3 million impact per annum in the US dairy population. The estimate for the total 31 median N caninum-related losses exceeded US$ 1.298 billion per annum, ranging as high as 32 US$ 2.380 billion. Nearly two thirds of the losses were incurred by the dairy industry (US$ 33 842.9 million). Annual losses on individual dairy farms were estimated to reach a median of 34 US$ 1,600.00, while on beef farms these costs amounted to just US$ 150.00. Pregnant cows 35 and heifers were estimated to incur, on average, a loss due to N caninum of less than 36 US$20.00 for dairy, and less than US$ 5.00 for beef. These loss estimates, however rose to 37 ~US$ 110.00 and US$ 40.00, respectively for N caninum-infected pregnant dairy and beef 38 cows. This estimate of global losses due to N caninum, with the identification of clear target 39 markets (countries, as well as cattle industries), should provide incentive to develop 40 treatment options and/or vaccines. 41 42 Keywords: Neospora caninum, abortion, cattle, costs, economics, dairy, beef 43 3 Introduction 44Neospora caninum is recognised world-wide as an important infectious cause of 45 abortion in primarily cattle, and of clinical disease in dogs (Dubey and Schares, 2011). 46 Infection with N caninum is frequent in canid populations (Barber et al., 1997; Reichel, 47 1998); also recently reviewed by Al-Qassab et al. (2010)) yet clinical cases in dogs are rarely 48report...

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“…Diversos autores desenvolveram estudos envolvendo a sorologia de bovinos leiteiros com a epidemiologia da infecção pelo N. caninum (THORNTON et al, 1991;PARÉ et al, 1998). Mainar-Jaime et al (1999) relataram a combinação entre a presença de cães e a soropositividade da neosporose em rebanhos, indicando que a infecção por oocistos pode contribuir para o estabelecimento do N. caninum em bovinos.…”

Section: Introductionunclassified

Freqüência de anticorpos anti- Neospora caninum e anti- Toxoplasma gondii em cães da região nordeste do Estado de São Paulo. Correlação com neuropatias

Varandas¹,

Rached²,

Costa³

et al. 2001

Sem. Ci. Agr.

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Resumo: Investigou-se a presença de anticorpos anti-N. caninum e anti-T. gondii em 295 soros colhidos de cães oriundos da região Nordeste do Estado de São Paulo, com o objetivo de correlacionar a presença de anticorpos com eventuais distúrbios clínicos. Todas as amostras de soros foram examinadas pela reação de imunofluorescência indireta (RIFI) para ambos protozoários. As reações com recíprocas de títulos igual ou maior que 50 (N. caninum) e 16 (T. gondii) foram consideradas positivas. Diluições seqüenciais foram efetuadas até a obtenção do título sorológico final. Os resultados revelaram que 25 (8,48%) e 151 (51,19%) dos cães examinados apresentavam anticorpos anti-N. caninum e anti-T. gondii, respectivamente. Anticorpos para ambos os coccídios foram detectados em 17 animais (5,76%). Dos 58 cães (19,66%) que apresentavam sintomatologia nervosa, foram detectados anticorpos em 04 (1,36%) para N. caninum e em 24 (8,14%) para T. gondii. Apesar da literatura atribuir a ambos coccídios a etiologia de distúrbios neurológicos em cães, os resultados obtidos não revelaram correlação significativa (P>0,05) entre sorologia positiva e a presença de neuropatias nos animais examinados. Experimentos especialmente delineados necessitam ser conduzidos, principalmente com N. caninum, para elucidar essa eventual e importante correlação. Palavras-chave: Neospora caninum, Toxoplasma gondii, cães, neuropatias.Abstract: Two hundred and ninety five samples of canine sera, of dogs from northeast of Sao Paulo State were tested using an immunofluorescent antibody technique (RIFI-IgG) for the presence of Neospora caninum and Toxoplasma gondii antibodies. The relationship between antibodies and casual clinical problems also were investigated. The reactions with title = 50 (N. caninum) and = 16 (T. gondii) were considered positive. A total of 25 (8,48%) of tested samples were reactive and 270 (91,52%) non-reactive to N. caninum, while 151 (51,19%) of the samples were reactive and 144 (48,81%) were non-reactive to T. gondii. Dogs with serum that reacted positively to both protozons parasites were seen in 17 animals (5,76%). From 58 dogs (19,66%), that showed nervous sintomatology, were detected antibodies in 04 (1,36%) to N. caninum and in 24 (8,14%) to T. gondii. Statistical differences (P<0,05) between normal dogs and dogs with nervous sintomatology were not observed, despite of some papers have associated nervous signals with these parasites. More experiments should be conduced to show the relationship between N. caninum and clinical problem.

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Neosporaabortion in New Zealand cattle

Cited by 100 publications

References 11 publications

Ocorrência de anticorpos de Neospora caninum em vacas leiteiras avaliados pelos métodos ELISA e RIFI no município de Avaré, SP

Ocorrência de anticorpos de Neospora caninum em vacas leiteiras avaliados pelos métodos ELISA e RIFI no município de Avaré, SP

What is the global economic impact of Neospora caninum in cattle – The billion dollar question

Freqüência de anticorpos anti- Neospora caninum e anti- Toxoplasma gondii em cães da região nordeste do Estado de São Paulo. Correlação com neuropatias

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