Histologically, immunohistochemically, ultrastructurally, and molecularly confirmed neosporosis abortion in an aborted equine fetus

Joseph A. Anderson; Derron A. Alves; Camila K. Cerqueira-Cézar; Andressa F. da Silva; Fernando H.A. Murata; Jamie K. Norris; Daniel K. Howe; Jitender P. Dubey

doi:10.1016/j.vetpar.2019.04.009

Histologically, immunohistochemically, ultrastructurally, and molecularly confirmed neosporosis abortion in an aborted equine fetus

Joseph A. Anderson, Derron A. Alves, Camila K. Cerqueira-Cézar, Andressa F. da Silva, Fernando H.A. Murata, Jamie K. Norris, Daniel K. Howe, Jitender P. Dubey

Veterinary Science

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Neosporosis is a common cause of abortion in cattle worldwide but is rare in horses. Here, the first case of histologically, ultrastructurally, immunohistochemically, and molecularly confirmed equine abortion caused by neosporosis is reported. Samples of lung, heart, liver, skeletal muscle, tongue, brain, and the placenta from a female fetus aborted at 280 days of gestation were fixed in formalin and submitted for diagnosis. Histologically, there was disseminated neosporosis with severe lesions in lungs, liver and the heart. Protozoal tachyzoites in all tissues reacted with polyclonal anti-Neospora caninum rabbit antibodies. Transmission electron microscopic observation on lung tissue revealed tachyzoites consistent with Neospora, including many rhoptries. Polymerase-chain reaction (PCR)using primers designed to amplify the rRNA gene internal transcribed spacer 1 (ITS1)of the Sarcocystidae was performed on DNA extracted from fetal tissues. Comparison of the ITS1 amplified from the foal tissue to sequences available in GenBank revealed 100% sequence identity to the ITS1 from three isolates of Neospora hughesi.

Original language	English
Pages (from-to)	20-24
Number of pages	5
Journal	Veterinary Parasitology
Volume	270
DOIs	https://doi.org/10.1016/j.vetpar.2019.04.009
State	Published - Jun 2019

Bibliographical note

Funding Information:
This research was supported in part by an appointment to the Agricultural Research Service (ARS) Research Participation Program administered by the Oak Ridge Institute for Science and Education (ORISE) through an interagency agreement between the U.S. Department of Energy (DOE) and the U.S. Department of Agriculture (USDA). ORISE is managed by ORAU under DOE contract number DE-SC0014664. All opinions expressed in this paper are the author's and do not necessarily reflect the policies and views of USDA, ARS, DOE, or ORAU/ORISE.

Publisher Copyright:
© 2019

Keywords

Diagnosis
Horse
Molecular
Neospora, abortion
Tachyzoites

ASJC Scopus subject areas

Parasitology
Veterinary (all)

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10.1016/j.vetpar.2019.04.009

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@article{873be420c723452ea2280201a7759463,

title = "Histologically, immunohistochemically, ultrastructurally, and molecularly confirmed neosporosis abortion in an aborted equine fetus",

abstract = "Neosporosis is a common cause of abortion in cattle worldwide but is rare in horses. Here, the first case of histologically, ultrastructurally, immunohistochemically, and molecularly confirmed equine abortion caused by neosporosis is reported. Samples of lung, heart, liver, skeletal muscle, tongue, brain, and the placenta from a female fetus aborted at 280 days of gestation were fixed in formalin and submitted for diagnosis. Histologically, there was disseminated neosporosis with severe lesions in lungs, liver and the heart. Protozoal tachyzoites in all tissues reacted with polyclonal anti-Neospora caninum rabbit antibodies. Transmission electron microscopic observation on lung tissue revealed tachyzoites consistent with Neospora, including many rhoptries. Polymerase-chain reaction (PCR)using primers designed to amplify the rRNA gene internal transcribed spacer 1 (ITS1)of the Sarcocystidae was performed on DNA extracted from fetal tissues. Comparison of the ITS1 amplified from the foal tissue to sequences available in GenBank revealed 100% sequence identity to the ITS1 from three isolates of Neospora hughesi.",

keywords = "Diagnosis, Horse, Molecular, Neospora, abortion, Tachyzoites",

author = "Anderson, {Joseph A.} and Alves, {Derron A.} and Cerqueira-C{\'e}zar, {Camila K.} and {da Silva}, {Andressa F.} and Murata, {Fernando H.A.} and Norris, {Jamie K.} and Howe, {Daniel K.} and Dubey, {Jitender P.}",

note = "Funding Information: This research was supported in part by an appointment to the Agricultural Research Service (ARS) Research Participation Program administered by the Oak Ridge Institute for Science and Education (ORISE) through an interagency agreement between the U.S. Department of Energy (DOE) and the U.S. Department of Agriculture (USDA). ORISE is managed by ORAU under DOE contract number DE-SC0014664. All opinions expressed in this paper are the author's and do not necessarily reflect the policies and views of USDA, ARS, DOE, or ORAU/ORISE. Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = jun,

doi = "10.1016/j.vetpar.2019.04.009",

language = "English",

volume = "270",

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AU - Anderson, Joseph A.

AU - Alves, Derron A.

AU - Cerqueira-Cézar, Camila K.

AU - da Silva, Andressa F.

AU - Murata, Fernando H.A.

AU - Norris, Jamie K.

AU - Howe, Daniel K.

AU - Dubey, Jitender P.

N1 - Funding Information: This research was supported in part by an appointment to the Agricultural Research Service (ARS) Research Participation Program administered by the Oak Ridge Institute for Science and Education (ORISE) through an interagency agreement between the U.S. Department of Energy (DOE) and the U.S. Department of Agriculture (USDA). ORISE is managed by ORAU under DOE contract number DE-SC0014664. All opinions expressed in this paper are the author's and do not necessarily reflect the policies and views of USDA, ARS, DOE, or ORAU/ORISE. Publisher Copyright: © 2019

PY - 2019/6

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N2 - Neosporosis is a common cause of abortion in cattle worldwide but is rare in horses. Here, the first case of histologically, ultrastructurally, immunohistochemically, and molecularly confirmed equine abortion caused by neosporosis is reported. Samples of lung, heart, liver, skeletal muscle, tongue, brain, and the placenta from a female fetus aborted at 280 days of gestation were fixed in formalin and submitted for diagnosis. Histologically, there was disseminated neosporosis with severe lesions in lungs, liver and the heart. Protozoal tachyzoites in all tissues reacted with polyclonal anti-Neospora caninum rabbit antibodies. Transmission electron microscopic observation on lung tissue revealed tachyzoites consistent with Neospora, including many rhoptries. Polymerase-chain reaction (PCR)using primers designed to amplify the rRNA gene internal transcribed spacer 1 (ITS1)of the Sarcocystidae was performed on DNA extracted from fetal tissues. Comparison of the ITS1 amplified from the foal tissue to sequences available in GenBank revealed 100% sequence identity to the ITS1 from three isolates of Neospora hughesi.

AB - Neosporosis is a common cause of abortion in cattle worldwide but is rare in horses. Here, the first case of histologically, ultrastructurally, immunohistochemically, and molecularly confirmed equine abortion caused by neosporosis is reported. Samples of lung, heart, liver, skeletal muscle, tongue, brain, and the placenta from a female fetus aborted at 280 days of gestation were fixed in formalin and submitted for diagnosis. Histologically, there was disseminated neosporosis with severe lesions in lungs, liver and the heart. Protozoal tachyzoites in all tissues reacted with polyclonal anti-Neospora caninum rabbit antibodies. Transmission electron microscopic observation on lung tissue revealed tachyzoites consistent with Neospora, including many rhoptries. Polymerase-chain reaction (PCR)using primers designed to amplify the rRNA gene internal transcribed spacer 1 (ITS1)of the Sarcocystidae was performed on DNA extracted from fetal tissues. Comparison of the ITS1 amplified from the foal tissue to sequences available in GenBank revealed 100% sequence identity to the ITS1 from three isolates of Neospora hughesi.

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KW - Horse

KW - Molecular

KW - Neospora, abortion

KW - Tachyzoites

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Histologically, immunohistochemically, ultrastructurally, and molecularly confirmed neosporosis abortion in an aborted equine fetus

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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