Dogs shed Neospora caninum oocysts after ingestion of naturally infected bovine placenta but not after ingestion of colostrum spiked with Neospora caninum tachyzoites

Dijkstra, T.; Eysker, M.; Schares, Gereon; Conraths, Franz J.; Wouda, W.; Barkema, Herman W.

doi:10.1016/s0020-7519(01)00230-2

Cited by 142 publications

(105 citation statements)

References 28 publications

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“…In farm dogs the seroprevalence reached 46.24%; a similar high seroprevalence in this type of dogs was also noticed by Lasri et al [31] in Belgium. This is probably linked with the availability of infective material such as aborted fetuses and placentas [42,43]. This hypothesis is supported also by the high antibody titres recorded in farm dogs.…”

Section: Discussionmentioning

confidence: 85%

First epidemiological study on exposure to Neospora caninum in different canine populations in the Algiers District (Algeria)

Ghalmi

China

Kaidi

et al. 2009

Parasitology International

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Neospora caninum is an important cause of abortion in cattle worldwide. Dogs act as final hosts shedding oocysts in the environment. They can also harbour the extraintestinal stage of the parasite and this may be associated with a fairly rare neuromuscular condition. The sera of 781 dogs from the Algiers District were screened by IFAT for the presence of anti-N. caninum antibodies. These dogs were distributed into four populations: local stray dogs, police dogs, dogs from breeding kennels and farm dogs. The overall seroprevalence was 21.90%. Significant differences were observed between the different populations, the highest prevalence being observed in farm (44.44%) and stray dogs (22.55%). Additionally, the highest titres were observed in farm dogs. Among studied epidemiological parameters, breed, dog origin, season and vaccination status were significantly associated with IFAT results. Additionally, a recently described real time PCR was used on the blood of 100 pound dogs and the results were compared with the serological data. A higher proportion of dogs was found to be positive by PCR when compared to the IFAT results. There was only a fairly low agreement between PCR and IFAT results which suggests that these techniques measured different aspects of the host-parasite relationship. This study indicates that the level of exposure of the canine population of Algiers area to N. caninum is very high. This would indicate a potentially high risk for N. caninum induced abortion in cattle in this region and in Algeria.

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Section: Discussionmentioning

confidence: 85%

First epidemiological study on exposure to Neospora caninum in different canine populations in the Algiers District (Algeria)

Ghalmi

China

Kaidi

et al. 2009

Parasitology International

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“…This suggests that these materials may pose an infection risk to dogs; i.e., these materials may facilitate dogs becoming infected with N. caninum. In an experimental study, placenta, but not colostrum, has been confirmed as an infection source for dogs (120). Interestingly, feeding on aborted fetuses was not identified as a potential risk factor in herds with evidence of recent postnatal infection (123), and no oocyst shedding was observed when aborted fetuses or brains of fetuses were fed to dogs experimentally (48).…”

Section: Infection Riskmentioning

confidence: 96%

“…Neonatal calves may become infected after ingestion of milk contaminated with tachyzoites (110,446), and N. caninum-DNA in milk, including colostrum, has been demonstrated (316,317). However, there is no conclusive evidence that lactogenic transmission of N. caninum occurs in nature (120).…”

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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“…It should also be able to prevent these carnivores eat foods such as meat or raw entrails, and especially farm animals [42]. To prevent the ingestion of aborted foetuses and placental membranes should discard these materials in an appropriate place, since we do not have efficient commercial vaccines on the market [53].…”

Section: Contamination Can Occur Vertically When a Bitch With Subclinmentioning

confidence: 99%

Infectious Causes of Abortion, Stillbirth and Neonatal Death in Bitches

Antunes¹,

CarvalhoFreire²,

Oliveira³

et al. 2016

Canine Medicine - Recent Topics and Advanced Research

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Problems in gestational development in dogs can be determined by infectious and noninfectious causes. Among the non-infectious causes, trauma during pregnancy, genetic characteristics of the animal, deficit nutrition, thyroid dysfunction, maternal problems and hormonal disorders are found. The majority of the cases are in relation to infectious diseases, one should consider viral, bacterial, fungal and protozoal, which can interfere directly or indirectly in the foetal development. The progression of foetal development may be affected by the direct action of the microorganisms to overcome the placenta, but they are also able to affect pregnancy and release placental toxins by inflammatory processes and, may still cause maternal pathologies, which entail problems such as hyperthermia, hypoxia and endotoxemia, which can result in abortion. Several diseases can trigger pregnancy loss in dogs. This action can be direct by microorganisms, as well as indirectly triggering other problems that lead to abortion. This chapter discusses the infectious aetiologies of reproductive failures (abortion, stillbirth and neonatal death) in bitches.

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Dogs shed Neospora caninum oocysts after ingestion of naturally infected bovine placenta but not after ingestion of colostrum spiked with Neospora caninum tachyzoites

Cited by 142 publications

References 28 publications

First epidemiological study on exposure to Neospora caninum in different canine populations in the Algiers District (Algeria)

First epidemiological study on exposure to Neospora caninum in different canine populations in the Algiers District (Algeria)

Epidemiology and Control of Neosporosis andNeospora caninum

Infectious Causes of Abortion, Stillbirth and Neonatal Death in Bitches

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