Virulence of current German PEDV strains in suckling pigs and investigation of protective effects of maternally derived antibodies

Porcine epidemic diarrhea (PED) has caused tremendous losses to the United States pig industry since 2013. From 2014, outbreaks were also reported from Central Europe. To characterize the Central European PEDV strains regarding their virulence in suckling piglets, and to assess the protective effect...

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Veröffentlicht in:Scientific reports 2017-09, Vol.7 (1), p.10825-11, Article 10825
Hauptverfasser: Leidenberger, S., Schröder, Ch, Zani, L., Auste, A., Pinette, M., Ambagala, A., Nikolin, V., de Smit, H., Beer, M., Blome, S.
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container_title Scientific reports
container_volume 7
creator Leidenberger, S.
Schröder, Ch
Zani, L.
Auste, A.
Pinette, M.
Ambagala, A.
Nikolin, V.
de Smit, H.
Beer, M.
Blome, S.
description Porcine epidemic diarrhea (PED) has caused tremendous losses to the United States pig industry since 2013. From 2014, outbreaks were also reported from Central Europe. To characterize the Central European PEDV strains regarding their virulence in suckling piglets, and to assess the protective effect of maternally derived antibodies (MDA), four trial groups were randomly assigned, each consisting of two pregnant sows and their litter. To induce MDA in a subset of piglets, two sows received a cell culture-adapted PEDV strain, and another two sows were inoculated with field material from German PED outbreaks. Four sows stayed naïve. Subsequently, all piglets were inoculated with the corresponding PEDV strains at an age of 3 to 6 days, and virus shedding, clinical signs and occurrence of specific antibodies were assessed. Piglets without MDA showed a morbidity of 100% and low lethality, while almost all MDA-positive piglets stayed clinically healthy and showed considerably lower virus shedding. Taken together, the Central European PEDV strains showed rather low virulence under experimental conditions, and pre-inoculation of sows led to a solid protection of their offspring. The latter is the prerequisite for a sow vaccination concept that could help to prevent PED induced losses in the piglet sector.
doi_str_mv 10.1038/s41598-017-11160-w
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From 2014, outbreaks were also reported from Central Europe. To characterize the Central European PEDV strains regarding their virulence in suckling piglets, and to assess the protective effect of maternally derived antibodies (MDA), four trial groups were randomly assigned, each consisting of two pregnant sows and their litter. To induce MDA in a subset of piglets, two sows received a cell culture-adapted PEDV strain, and another two sows were inoculated with field material from German PED outbreaks. Four sows stayed naïve. Subsequently, all piglets were inoculated with the corresponding PEDV strains at an age of 3 to 6 days, and virus shedding, clinical signs and occurrence of specific antibodies were assessed. Piglets without MDA showed a morbidity of 100% and low lethality, while almost all MDA-positive piglets stayed clinically healthy and showed considerably lower virus shedding. 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Taken together, the Central European PEDV strains showed rather low virulence under experimental conditions, and pre-inoculation of sows led to a solid protection of their offspring. The latter is the prerequisite for a sow vaccination concept that could help to prevent PED induced losses in the piglet sector.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>28883628</pmid><doi>10.1038/s41598-017-11160-w</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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subjects 631/250/255/2514
631/326/596/2555
Animals
Antibodies
Antibodies, Viral - blood
Cell culture
Coronavirus Infections - immunology
Coronavirus Infections - pathology
Coronavirus Infections - veterinary
Coronavirus Infections - virology
Diarrhea
Germany
Hogs
Humanities and Social Sciences
Immunity, Maternally-Acquired
Immunoglobulins
Inoculation
Lethality
Morbidity
multidisciplinary
Offspring
Outbreaks
Porcine epidemic diarrhea virus - immunology
Porcine epidemic diarrhea virus - isolation & purification
Porcine epidemic diarrhea virus - pathogenicity
Pregnancy
Science
Science (multidisciplinary)
Strains (organisms)
Suckling behavior
Survival Analysis
Swine
Swine Diseases - immunology
Swine Diseases - pathology
Swine Diseases - virology
Transmissible gastroenteritis
Vaccination
Virulence
Virus Shedding
title Virulence of current German PEDV strains in suckling pigs and investigation of protective effects of maternally derived antibodies
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