Piglet innate immune response to Streptococcus suis colonization is modulated by the virulence of the strain
Ver/Abrir
Autor/a
Neila‑Ibáñez, Carlos
Brogaard, Louise
Pailler‑García, Lola
Segura, Mariela
Heegaard, Peter M. H.
Fecha de publicación
2021-12-19ISSN
0928-4249
Resumen
Streptococcus suis is a zoonotic pathogen of swine involved in arthritis, polyserositis, and meningitis. Colonization of
piglets by S. suis is very common and occurs early in life. The clinical outcome of infection is infuenced by the viru‑
lence of the S. suis strains and the immunity of the animals. Here, the role of innate immunity was studied in cesareanderived colostrum-deprived piglets inoculated intranasally with either virulent S. suis strain 10 (S10) or non-virulent S.
suis strain T15. Colonization of the inoculated piglets was confrmed at the end of the study by PCR and immunohis‑
tochemistry. Fever (≥40.5 °C) was more prevalent in piglets inoculated with S10 compared to T15 at 4 h after inocula‑
tion. During the 3 days of monitoring, no other major clinical signs were detected. Accordingly, only small changes
in transcription of genes associated with the antibacterial innate immune response were observed at systemic sites,
with S10 inducing an earlier response than T15 in blood. Local infammatory response to the inoculation, evaluated
by transcriptional analysis of selected genes in nasal swabs, was more sustained in piglets inoculated with the virulent
S10, as demonstrated by transcription of infammation-related genes, such as IL1B, IL1A, and IRF7. In contrast, most of
the gene expression changes in trachea, lungs, and associated lymph nodes were observed in response to the nonvirulent T15 strain. Thus, S. suis colonization in the absence of systemic infection induces an innate immune response
in piglets that appears to be related to the virulence potential of the colonizing strain.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
619 - Veterinaria
Páginas
15
Publicado por
BMC
Publicado en
Veterinary Research
Citación
Neila-Ibáñez, Carlos, Louise Brogaard, Lola Pailler-García, Jorge Martínez, Joaquim Segalés, Mariela Segura, Peter M. H. Heegaard, and Virginia Aragon. 2021. "Piglet Innate Immune Response To Streptococcus Suis Colonization Is Modulated By The Virulence Of The Strain". Veterinary Research 52 (1). doi:10.1186/s13567-021-01013-w.
Número del acuerdo de la subvención
EC/H2020/727966/EU/Program for Innovative Global Prevention of Streptococcus suis/PIGSs
Program
Sanitat Animal
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