Serological evidence of Neospora caninum in dual-purpose cattle herds in Venezuela

Lista-Alves, Deisy; Palomares-Naveda, R.; García, Francisco; Obando, César; Arrieta, Darwuin; Hoet, Armando E.

doi:10.1016/j.vetpar.2005.11.027

Cited by 8 publications

(5 citation statements)

References 7 publications

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“…Neosporosis has been identified in several countries, with the following reported seroprevalences: Morocco -8.52% (15/176) (LUCCHESE et al, 2016), (SUN et al, 2015), (GHALMI et al, 2012), (DUONG et al, 2008), Japan -5.7% (139/2420) (KOIWAI et al, 2006), (KYAW et al, 2004), United States -10.34% (9/87) to 32.11% (105/327) , Venezuela -11.3% (52/459) (LISTA-ALVES et al, 2006), Paraguay -29.8% (262/879) (OSAWA et al, 2002), and Spain -35.9% (402/1121) (QUINTANILLA-GOZALO et al, 1999). Antibodies against N. caninum were detected in serum from dairy cattle from herds located in several Brazilian states (RAGOZO et al, 2003), and a seroprevalence of 16.83% (101/600) was reported in the states of São Paulo and Minas Gerais (COSTA et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Seroprevalence and risk factors associated with Neospora caninum in crossbred dairy cows in Uberlândia

Nasciutti

Oliveira

Barbosa

et al. 2018

SCA

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Neospora caninum causes reproductive disorders in dairy cattle such as repeat breeding, abortion, and anestrus, which are risk factors associated with the seroprevalence of N. caninum in Brazil and worldwide. This study aimed to verify the risk factors related to the seroprevalence of Neospora caninum in crossbred dairy cows in the city of Uberlândia, Minas Gerais. During, January to July 2013, 740 blood samples were collected from 57 herds with a history of reproductive disorders and determinations of antibody titers against N. caninum were obtained by ELISA assay. The seroprevalence of N. caninum was 18.4% (136/740). Risk factors for N. caninum were cows greater than 2 years of age (P = 0.034), mechanical milking (P = 0.012), and frequent purchase of animals (P = 0.004), in addition to individual history of abortion (P = 0.007) and repeat breeding (P = 0.030). The highest probability of occurrence of associated risk factors was associated with individual history of abortion and repeated breeding and the frequent purchase of animals, with odds of 12.8, 5.9, and 3.8 times, respectively. In conclusion, the risk factors associated with N. caninum: members of the female sex and cows with more than 2 yearsof-age, mechanical milking, and the frequent purchase of animals, in addition to individual history of abortion and repeated breeding.

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Section: Introductionmentioning

confidence: 99%

Seroprevalence and risk factors associated with Neospora caninum in crossbred dairy cows in Uberlândia

Nasciutti

Oliveira

Barbosa

et al. 2018

SCA

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“…Para el momento del estudio en ninguna de las fincas se habían aplicado vacunas contra N. caninum. El cálculo del tamaño de la muestra se hizo empleando la fórmula del muestreo aleatorio simple (18) , para lo cual se estableció un margen de error del 20 % de la prevalencia, un nivel de confianza del 95 % y una prevalencia esperada del 15 % en base a estudios previos realizados en Venezuela (15,20) , obteniéndose un tamaño de muestra de 544 animales, de la siguiente manera: n= Z 2 * p * q / e 2 , entonces n= 1,96 2 * 15 * 85 / (20 * 15/ 100) 2 = 544 animales. Sin embargo, el tamaño de la muestra se llevó hasta 890 animales, ya que se contaba con suficientes recursos para el momento de la investigación.…”

Section: Introductionunclassified

“…Se determinó una frecuencia serológica individual de 21 % en el municipio Ortíz del estado Guárico, encontrando animales seropositivos en 23/30 (76.6 %) de las fincas examinadas. Los resultados obtenidos coinciden con lo señalado en otros estudios (10) donde determinaron 14.09 % de seroprevalencia en vacas de 13 estados de Venezuela, así como 11.3 % en vacas procedentes de fincas doble propósito y 86.7 % de fincas seropositivas (20) . Igualmente, los resultados obtenidos coinciden con lo reportado por León et al (12) quienes señalaron 13 y 17 % en ganaderías doble propósito del estado Guárico y sur del estado Aragua, respectivamente.…”

Section: Introductionunclassified

Frecuencia de Neospora caninum en bovinos doble propósito en fincas del estado Guárico, Venezuela

León¹,

Borges

2018

Rev. Mex. Cienc. Pecu.

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Se condujo una investigación con el propósito de determinar la frecuencia de Neospora caninum en bovinos de doble propósito. Se colectaron 890 muestras de sangre distribuidas en cuatro grupos etarios: 0–6 meses, 6–12 meses, 12–24 meses y >24 meses. La presencia de anticuerpos se determinó mediante un kit de ELISA indirecto, y los resultados se clasificaron en positivos y negativos. La seroprevalencia general fue de 21 % en bovinos, y 76.6 % en las fincas evaluadas. Al referir los resultados al grupo etario no se encontró asociación estadística (P>0.05); sin embargo, el riesgo de ser seropositivo incrementa con la edad, indicando la alta probabilidad de transmisión horizontal de N. caninum en el rebaño. Igualmente no hubo asociación estadística con respecto al sexo (P>0.05). Con relación al estatus reproductivo, se encontró asociación estadística (P<0.05) con respecto al aborto. Aunque todos los grupos resultaron positivos, las vacas con historia de aborto mostraron mayor seroconversión, lo que indica que el riesgo de aborto aumenta con niveles crecientes de anticuerpos contra el parásito. Del total de fincas positivas (76.6), se observó mayor seroconversión (100) en las que tenían mayor cantidad de perros (> 7 perros), y este resultado indica que a mayor cantidad de perros, mayor prevalencia de N. caninum, ya que los perros son la principal fuente de transmisión horizontal. Se concluye que existe circulación antigénica de N. caninum asociada a abortos en bovinos del estado Guarico, y que pudiera ser controlada mejorando las condiciones sanitarias de las explotaciones.

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“…As definitive hosts dogs, coyotes and Australian dingoes have been identified (McAllister et al , 1998; Gondim et al , 2004; King et al , 2010). Worldwide the seroprevalence of neosporosis in cattle varies and different values were obtained: 5.7% in Japan (Koiwai et al , 2006), 13.9% in Uruguay (Banales et al , 2006), 11.3% in Venezuela (Lista-Alves et al , 2006), 20.1% in Slovakia (Reiterova et al , 2009), 24.1% in Spain (Panadero et al , 2010) and 2.8% in Sweden (Loobuyck et al , 2009). …”

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Seroprevalence ofNeospora caninumin dairy cattle from north-west and centre of Romania

et al. 2011

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Neosporosis is a disease that mainly affects cattle in both dairy and beef herds. The main definitive host of this parasite is the dog. Since 1984 and its first description a large number of data were published worldwide on this parasite. In Romania, the research regarding this parasite is limited. The purpose of this study was to determine the seroprevalence of Neospora caninum infection in dairy cattle from six regions in north-western Romania and to evaluate the intensity of infection in different animals groups. A total number of 901 samples (862 sera from adult cows and 39 sera from calves) were collected from dairy farms and were screened for the presence of specific IgG anti-bodies using an enzyme-linked immunosorbent assay (ELISA). The overall seroprevalence for neosporosis was 34.6%. In adult cows and calves seroprevalences reached 34.8% (300/862) and 30.8% for calves (12/39) respectively. In cattle which had previously aborted, seroprevalence was 40.9%. These results indicate that N. caninum infection is widespread among animals reared in dairy systems from Romania and a program for farmer training and a strategy for reducing the economic impact of the disease are needed.

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Serological evidence of Neospora caninum in dual-purpose cattle herds in Venezuela

Cited by 8 publications

References 7 publications

Seroprevalence and risk factors associated with Neospora caninum in crossbred dairy cows in Uberlândia

Seroprevalence and risk factors associated with Neospora caninum in crossbred dairy cows in Uberlândia

Frecuencia de Neospora caninum en bovinos doble propósito en fincas del estado Guárico, Venezuela

Seroprevalence ofNeospora caninumin dairy cattle from north-west and centre of Romania

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