<i>Neospora</i>-Like Protozoan Infection as a Cause of Abortion in Dairy Cattle

Nietfeld, Jerome C.; Dubey, J. P.; Anderson, Margaret Lavinia; Libal, Melissa C.; Yaeger, Michael J.; Neiger, Regg D.

doi:10.1177/104063879200400228

Cited by 42 publications

(27 citation statements)

References 9 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…O envolvimento de múltiplos agentes em abortos bovinos tem sido relatado (Caldow 1998). Infecção por N. caninum tem sido associada a diferentes agentes, tais como BVDV e BHV-4 (Dubey et al 1990;Nietfeld et al 1992). Torna-se difícil indicar qual infecção é a principal responsável pelo aborto e, se a sinergia entre os agentes concorrentes pode ser mais prejudicial para a sobrevivên-cia fetal (Corbellini et al 2006a).…”

Section: Discussionunclassified

Causas de aborto bovino diagnosticadas no Setor de Patologia Veterinária da UFRGS de 2003 a 2011

et al. 2013

View full text Add to dashboard Cite

Descrevem-se as causas de aborto bovino diagnosticadas no Setor de Patologia Veterinária da Universidade Federal do Rio Grande do Sul no período de janeiro de 2003 a dezembro de 2011. Um total de 490 fetos bovinos foi analisado neste período. Causas específicas de aborto foram encontradas em 46,7% dos casos. Infecções por protozoários, em especial Neospora caninum acometeram 33% dos casos (162/490). Bactérias com 6,3% (31/490), seguidas por fungos com 0,8% (4/490) dos casos, foram causas adicionais de abortos. Em dois fetos (0,4%), coinfecções por dois agentes foram identificadas. Causas não-infecciosas foram observadas em 3% dos abortos e Malformações congênitas em 2,6%.

show abstract

Section: Discussionunclassified

Causas de aborto bovino diagnosticadas no Setor de Patologia Veterinária da UFRGS de 2003 a 2011

et al. 2013

View full text Add to dashboard Cite

show abstract

“…1,13 Case reports from several geographic regions in the USA have confirmed that the disease is more widespread in dairy cattle, but it also occurs in beef animals. 3,6,8,10,11,14 Transplacental transmission is currently the only known route of infection, but a vertebrate definitive host is suspected. 5 The fetal lesions of bovine neosporosis have been described in previous reports.…”

mentioning

confidence: 99%

“…5 The fetal lesions of bovine neosporosis have been described in previous reports. [2][3][4]6,8,[10][11][12]14 It is believed there is a preliminary placentitis from which the organism is distributed through the blood to fetal tissues. In field cases of neosporal abortion, the organism has been identified in brain, spinal cord, striated muscle, liver, kidney, lung, adrenal gland, and adipose tissue, and it is associated with either granulomatous or nonsuppurative inflammation.…”

mentioning

confidence: 99%

Neosporal Abortion in Oklahoma Cattle with Emphasis on the Distribution of Brain Lesions in Aborted Fetuses

et al. 1998

View full text Add to dashboard Cite

“…This change was different from the foci of large mononuclear inflammatory cells associated or not with focal necrosis in the cotyledonary area, as reported in natural or experimental Neospora abortion. 1,3,8 Mineralization was present in all placentas examined, and therefore no association could be made between this change and N. caninum infection.…”

mentioning

confidence: 99%

“…2 When tachyzoites are present in placentas of aborted fetuses, they are in small numbers comparatively to those observed in the brains of aborted fetuses. 1,3,8 The autolysis present in the placentas examined may also explain in part the negative results of immunohistochemistry.…”

mentioning

confidence: 99%

Rare Detection of Neospora Caninum in Placentas from Seropositive Dams Giving Birth to Full-Term Calves

Bergeron

Girard

Paré³

et al. 2001

J VET Diagn Invest

View full text Add to dashboard Cite

Abstract. Neospora caninum is thought to be transmitted to cattle by dogs, the only known definitive host. Although aborted fetuses seem the most likely source of infective material for dogs, placentas from seropositive dams appear also as a potential source of infective material. The objective of the study was to evaluate the presence of N. caninum organisms in placentas of full-term calves born to seropositive cows. Sixteen placentas, 11 from Neospora-seropositive cows, were examined histologically and by immunohistochemistry and polymerase chain reaction (PCR) assay for the presence of N. caninum. Mild placentitis was observed in all placentas. Neospora caninum was not identified by immunohistochemistry, but placentas from 2 seropositive dams were positive for N. caninum by PCR. These results suggest that placentas of full-term calves from seropositive cows may be a potential source of N. caninum for dogs, but the incidence of this mode of transmission is likely to be low.

show abstract

Neospora-Like Protozoan Infection as a Cause of Abortion in Dairy Cattle

Cited by 42 publications

References 9 publications

Causas de aborto bovino diagnosticadas no Setor de Patologia Veterinária da UFRGS de 2003 a 2011

Causas de aborto bovino diagnosticadas no Setor de Patologia Veterinária da UFRGS de 2003 a 2011

Neosporal Abortion in Oklahoma Cattle with Emphasis on the Distribution of Brain Lesions in Aborted Fetuses

Rare Detection of Neospora Caninum in Placentas from Seropositive Dams Giving Birth to Full-Term Calves

Contact Info

Product

Resources

About