Neospora caninum and Toxoplasma gondii infections and their relationship with reproductive losses in farmed red deer (Cervus elaphus)

The aims of the present study were to determine the Neospora caninum and Toxoplasma gondii seropositivity rates in farmed red deer hinds from Argentina and their relationship with reproductive losses. Over a 2-year period, 449 hinds from 4 commercial farms were...

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Autores principales:	Soler, Juan Pablo, Dellarupe, Andrea, Moré, Gastón Andrés
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2021
Materias:	Veterinaria Neospora caninum Toxoplasma gondii Red deer Reproductive losses Abortion Postnatal mortality
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/134532
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-134532
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Veterinaria Neospora caninum Toxoplasma gondii Red deer Reproductive losses Abortion Postnatal mortality
spellingShingle	Veterinaria Neospora caninum Toxoplasma gondii Red deer Reproductive losses Abortion Postnatal mortality Soler, Juan Pablo Dellarupe, Andrea Moré, Gastón Andrés <i>Neospora caninum</i> and <i>Toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>Cervus elaphus</i>)
topic_facet	Veterinaria Neospora caninum Toxoplasma gondii Red deer Reproductive losses Abortion Postnatal mortality
description	The aims of the present study were to determine the <i>Neospora caninum</i> and <i>Toxoplasma gondii</i> seropositivity rates in farmed red deer hinds from Argentina and their relationship with reproductive losses. Over a 2-year period, 449 hinds from 4 commercial farms were serologically tested at late gestation for <i>N. caninum</i> and <i>T. gondii</i> by IFAT. During the first year, a sequential serological analysis was carried out at 3 different time points to analyze antibody dynamics from mating until the end of the gestation period. Fetal and postnatal mortality rates were estimated by 3 successive ultrasound scannings (us) annually and a breeding control carried out after the calving period. Ultrasound fetal measurements were used to estimate conception date and gestational age of abortions. The seropositivity rate for <i>N. caninum</i> was 25.5% (37/145) for the yearlings and 34.2% (104/304) for the adults, while for <i>T. gondii</i> was 64.3% (93/145) and 78.3% (238/304), respectively. Abortions detected at us1 and us2 were 13/21 (61.9%) with a range of gestational age of 30-87 days, while abortions detected at us3 were 8/21 (38.1%) with a range of gestational age of 49-209 days. The fetal mortality rate was 4% and 5.8%, while the postnatal mortality rate was 18.8% and 4.1% of 101 yearlings and 294 adult pregnant hinds, respectively. Most seropositive hinds to both protozoans showed a stable antibody titer pattern from mating to the end of gestation, and a lower proportion developed an increase in titers suggesting infection recrudescence. Seroconversion during the gestational period was demonstrated in 6 and 50 hinds for <i>N. caninum</i> and <i>T. gondii</i>, respectively. Hinds with fetal mortality were more likely to be seropositive to <i>N. caninum</i> (OR = 3.1) or have <i>N. caninum</i> titers ≥400 (OR = 27.4) than hinds that weaned a fawn. No statistical associations were detected for <i>T. gondii</i> seropositivity and reproductive losses. The pregnancy rate was not affected by <i>N. caninum</i> or <i>T. gondii</i> infection, while the serological evidence of <i>N. caninum</i> causing postnatal mortality was marginal. Based on serological evidence, <i>N. caninum</i> would be a potential abortigenic agent in red deer hinds.
format	Articulo Articulo
author	Soler, Juan Pablo Dellarupe, Andrea Moré, Gastón Andrés
author_facet	Soler, Juan Pablo Dellarupe, Andrea Moré, Gastón Andrés
author_sort	Soler, Juan Pablo
title	<i>Neospora caninum</i> and <i>Toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>Cervus elaphus</i>)
title_short	<i>Neospora caninum</i> and <i>Toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>Cervus elaphus</i>)
title_full	<i>Neospora caninum</i> and <i>Toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>Cervus elaphus</i>)
title_fullStr	<i>Neospora caninum</i> and <i>Toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>Cervus elaphus</i>)
title_full_unstemmed	<i>Neospora caninum</i> and <i>Toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>Cervus elaphus</i>)
title_sort	<i>neospora caninum</i> and <i>toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>cervus elaphus</i>)
publishDate	2021
url	http://sedici.unlp.edu.ar/handle/10915/134532
work_keys_str_mv	AT solerjuanpablo ineosporacaninumianditoxoplasmagondiiiinfectionsandtheirrelationshipwithreproductivelossesinfarmedreddeericervuselaphusi AT dellarupeandrea ineosporacaninumianditoxoplasmagondiiiinfectionsandtheirrelationshipwithreproductivelossesinfarmedreddeericervuselaphusi AT moregastonandres ineosporacaninumianditoxoplasmagondiiiinfectionsandtheirrelationshipwithreproductivelossesinfarmedreddeericervuselaphusi
bdutipo_str	Repositorios
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<i>Neospora caninum</i> and <i>Toxoplasma gondii</i> infections and their relationship with reproductive losses in farmed red deer (<i>Cervus elaphus</i>)

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