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1. The contribution of the immune response to enhanced colibacillosis upon preceding viral respiratory infection in broiler chicken in a dual infection model

Author:
Dwars, R. Marius,   et al.   ; Weerts, Erik A.W.S.; Matthijs, Mieke G.R.; Bonhof, Josette; van Haarlem, Daphne A.; Gröne, Andrea; Verheije, M. Hélène; Jansen, Christine A.;     Show all 8 Authors
Source:
Veterinary immunology and immunopathology 2021 v.238 pp. 110276
ISSN:
0165-2427
Subject:
Avian metapneumovirus; Avian orthoavulavirus 1; Escherichia coli; Infectious bronchitis virus; air; bacterial antigens; body weight; broiler chickens; euthanasia; gene expression; immune response; immunohistochemistry; immunopathology; interleukin-10; interleukin-17; interleukin-6; lungs; macrophages; models; monocytes; pneumonia; tracheitis
Abstract:
... Colibacillosis in chickens caused by avian pathogenic Escherichia coli (APEC) is known to be aggravated by preceding infections with infectious bronchitis virus (IBV), Newcastle disease virus (NDV) and avian metapneumovirus (aMPV). The mechanism behind these virus-induced predispositions for secondary bacterial infections is poorly understood. Here we set out to investigate the immunopathogenesis ...
DOI:
10.1016/j.vetimm.2021.110276

2. Localization and developmental expression of two chicken host defense peptides: cathelicidin-2 and avian β-defensin 9

Author:
Dwars, R. Marius,   et al.   ; Cuperus, Tryntsje; van Dijk, Albert; Haagsman, Henk P.;     Show all 4 Authors
Source:
Developmental and comparative immunology 2016 v.61 pp. 48-59
ISSN:
0145-305X
Subject:
cathelicidins; chickens; heterophils; immunohistochemistry; infectious diseases; small intestine; spleen
Abstract:
... In the first weeks of life young chickens are highly susceptible to infectious diseases due to immaturity of the immune system. Little is known about the expression of host defense peptides (HDPs) during this period. In this study we examined the expression pattern of two chicken HDPs, the cathelicidin CATH-2 and the β-defensin AvBD9 by immunohistochemistry in a set of organs from embryonic day 12 ...
DOI:
10.1016/j.dci.2016.03.008

3. Course of infection and immune responses in the respiratory tract of IBV infected broilers after superinfection with E. coli

Author:
Dwars, R. Marius,   et al.   ; Matthijs, Mieke G.R.; Ariaans, Mark P.; van Eck, Jo H.H.; Bouma, Annemarie; Stegeman, Arjan; Vervelde, Lonneke;     Show all 7 Authors
Source:
Veterinary immunology and immunopathology 2009 v.127 no.1-2 pp. 77-84
ISSN:
0165-2427
Subject:
broiler chickens; lesions (animal); respiratory tract diseases; infectious bronchitis; respiratory system; disease severity; Infectious bronchitis virus; immune response; microbial detection; disease course; Escherichia coli
Abstract:
... Colibacillosis results from infection with avian pathogenic Escherichia coli bacteria. Healthy broilers are resistant to inhaled E. coli, but previous infection with vaccine or virulent strains of Infectious Bronchitis Virus (IBV) predisposes birds for severe colibacillosis. The aim of this study was to investigate how IBV affects the course of events upon infection with E. coli. Broilers were ino ...
DOI:
10.1016/j.vetimm.2008.09.016
PubMed:
18976820

4. Progression of lesions in the respiratory tract of broilers after single infection with Escherichia coli compared to superinfection with E. coli after infection with infectious bronchitis virus

Author:
Dwars, R. Marius,   et al.   ; Matthijs, Mieke G.R.; Daemen, Angeline J.J.M.; van Eck, Jo H.H.; Vervelde, Lonneke; Landman, Wil J.M.;     Show all 6 Authors
Source:
Veterinary immunology and immunopathology 2009 v.127 no.1-2 pp. 65-76
ISSN:
0165-2427
Subject:
broiler chickens; lesions (animal); respiratory tract diseases; Escherichia coli; Escherichia infections; Infectious bronchitis virus; infectious bronchitis; inflammation; antigen detection; histopathology; immunohistochemistry; edema; disease resistance
Abstract:
... The progression of Escherichia coli lesions was studied in the respiratory tract of 4-week-old commercial broilers. Lesions were induced after a single intratracheal E. coli infection, and after an infection with E. coli preceded 5 days earlier by an oculo-nasal and intratracheal infectious bronchitis virus (IBV) infection of either the virulent M41 strain or the H120 vaccine strain. Trachea, lung ...
DOI:
10.1016/j.vetimm.2008.09.019
PubMed:
19004507