NDLI: Immune responses upon experimental Erysipelothrix rhusiopathiae infection of naïve and vaccinated chickens

Content Provider	Springer Nature : BioMed Central
Author	Wattrang, Eva Eriksson, Helena Jinnerot, Tomas Persson, Maria Bagge, Elisabeth Söderlund, Robert Naghizadeh, Mohammad Dalgaard, Tina Sørensen
Abstract	Erysipelas, a disease caused by Erysipelothrix rhusiopathiae (ER), is an increasing problem in laying hens housed in cage-free systems. This study aimed to monitor immune responses during ER infection of naïve chickens and chickens vaccinated intra muscularly with a commercial inactivated ER vaccine. Chickens were infected intra muscularly with ER at 30 days of age and blood leukocyte counts, serum levels of mannose binding lectin (MBL) and ER-specific IgY were monitored until the experiment was terminated at day 15 after infection. ER was detected in blood from more chickens and at higher bacterial counts in the naïve group (day 1: 1 of 7 chickens; day 3: 6 of 6 chickens) than in the vaccinated group (day 1: 0 of 7 chickens; day 3: 1 of 6 chickens). During the acute phase of infection transient increases in circulating heterophil numbers and serum MBL levels were detected in all ER infected chickens but these responses were prolonged in chickens from the naïve group compared to vaccinated chickens. Before infection IgY titers to ER in vaccinated chickens did not differ significantly from those of naïve chickens but vaccinated chickens showed significantly increased IgY titers to ER earlier after infection compared to chickens in the naïve group. In conclusion, the ER infection elicited prompt acute innate responses in all chickens. Vaccinated chickens did not have high IgY titers to ER prior to infection but did however show lower levels of bacteraemia and their acute immune responses were of shorter duration.
Related Links	https://veterinaryresearch.biomedcentral.com/counter/pdf/10.1186/s13567-020-00830-9.pdf
Ending Page	13
Page Count	13
Starting Page	1
File Format	HTM / HTML
ISSN	12979716
DOI	10.1186/s13567-020-00830-9
Journal	Veterinary Research
Issue Number	1
Volume Number	51
Language	English
Publisher	BioMed Central
Publisher Date	2020-09-14
Access Restriction	Open
Subject Keyword	Veterinary Medicine Veterinary Science Virology Microbiology Immunology Erysipelothrix rhusiopathiae chicken leukocyte counts mannose-binding lectin IgY CD45 chicken mannose receptor MRC1L-B Veterinary Medicine/Veterinary Science
Content Type	Text
Resource Type	Article
Subject	Veterinary Medicine
Journal Impact Factor	3.7/2023
5-Year Journal Impact Factor	3.8/2023

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