Bovine<i>Neospora</i>abortion in north‐eastern New South Wales

Boulton, J.; Gill, P.; Cook, R W; Fraser, G. C.; Harper, P. A. W.; Dubey, J. P.

doi:10.1111/j.1751-0813.1995.tb15026.x

Cited by 50 publications

(21 citation statements)

References 13 publications

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“…The only previous report of N caninum in Australian beef cattle was from a diagnostic laboratory report of the aetiological cause of abortion in cattle in northern New South Wales, which found that 41% of all protozoal abortions diagnosed (presumably due to N caninum infection) occurred in beef herds. 1 The present study aimed to define the age-specific prevalence of antibodies to N caninum in central Queensland beef herds.…”

Section: Scientificmentioning

confidence: 99%

Prevalence of antibodies to Neospora caninum within central Queensland beef cattle

Stoessel

Taylor²,

McGowan

et al. 2003

Aust Veterinary J

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Section: Scientificmentioning

confidence: 99%

Prevalence of antibodies to Neospora caninum within central Queensland beef cattle

Stoessel

Taylor²,

McGowan

et al. 2003

Aust Veterinary J

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“…In their study, 25 (58,197,486). The rate of endogenous transplacental infection may decrease in subsequent pregnancies, indicating immunity (10,125,375).…”

Section: Transmission Of N Caninum In Cattlementioning

confidence: 99%

Epidemiology and Control of Neosporosis andNeospora caninum

2007

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SUMMARY Neospora caninum is a protozoan parasite of animals. Until 1988, it was misidentified as Toxoplasma gondii. Since its first recognition in dogs in 1984 and the description of the new genus and species Neospora caninum in 1988, neosporosis has emerged as a serious disease of cattle and dogs worldwide. Abortions and neonatal mortality are a major problem in livestock operations, and neosporosis is a major cause of abortion in cattle. Although antibodies to N. caninum have been reported, the parasite has not been detected in human tissues. Thus, the zoonotic potential is uncertain. This review is focused mainly on the epidemiology and control of neosporosis in cattle, but worldwide seroprevalences of N. caninum in animals and humans are tabulated. The role of wildlife in the life cycle of N. caninum and strategies for the control of neosporosis in cattle are discussed.

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“…In cattle, the probability of transplacental infection, determined by measurement of precolostral antibody status of calves born from seropositive dams, has been shown to be 0.95 (Davison et al, 1999). Further, cows remain infected for life and transmit N. caninum infection to their offspring in several consecutive pregnancies or intermittently (Boulton et al, 1995;Fioretti et al, 2000). Based on the study results, the authors conclude that N. hughesi infection can be transmitted over successive generations of horses by the endogenous transplacental route from a latently infected dam to her offspring.…”

Section: Discussionmentioning

confidence: 98%

Endogenous Transplacental Transmission of Neospora hughesi in Naturally Infected Horses

Pusterla

Conrad

Packham

et al. 2011

Journal of Parasitology

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Over a 2-yr study period, we investigated possible endogenous transplacental transmission of Neospora hughesi in 74 mare and foal pairs following the diagnosis of neuronal neosporosis in a weanling foal. Presuckle and postsuckle serum of each foal, serum and colostrum of each periparturient mare, and serum of each mare and foal pair, collected at 3-mo intervals thereafter, were tested for N. hughesi using an indirect fluorescent antibody test (IFAT). Furthermore, whole blood and colostrum samples and placentae were tested for the presence of N. hughesi by real-time PCR. The mares' seroprevalence at foaling based on IFAT (titer ≥ 160) was 52 and 6% in 2006 and 2007, respectively. Colostral antibodies against N. hughesi were detected in 96 and 11% of the mares in the 2-yr study. With the exception of 3 foals, all remaining foals were born seronegative to N. hughesi. Passive transfer of colostral antibodies to N. hughesi was documented in 15 foals. Three foals born from 2 different mares had presuckle antibodies at a titer ranging from 2,560 to 20,480. All 3 foals were born healthy. Two foals were born to the same dam that also gave birth to the weanling diagnosed with neuronal neosporosis in 2005. The third foal was born to a second mare with no previous foaling history at the farm. Seroconversion was documented in 10 foals and 9 mares over the 2-yr study. All blood and colostrum samples tested PCR negative for N. hughesi. Only 1 placenta collected in 2007 from the mare with the 2 congenitally infected foals tested PCR positive for N. hughesi. In conclusion, N. hughesi persisted in this population via endogenous transplacental infection.

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BovineNeosporaabortion in north‐eastern New South Wales

Cited by 50 publications

References 13 publications

Prevalence of antibodies to Neospora caninum within central Queensland beef cattle

Prevalence of antibodies to Neospora caninum within central Queensland beef cattle

Epidemiology and Control of Neosporosis andNeospora caninum

Endogenous Transplacental Transmission of Neospora hughesi in Naturally Infected Horses

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