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Manders T, Benedictus L, Spaninks M, Matthijs M. Enterococcus cecorum lesion strains are less sensitive to the hostile environment of albumen and more resistant to lysozyme compared to cloaca strains. Avian Pathol 2024; 53:106-114. [PMID: 38073364 DOI: 10.1080/03079457.2023.2286985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 11/19/2023] [Indexed: 01/26/2024]
Abstract
RESEARCH HIGHLIGHTS Egg albumen inhibits Enterococcus cecorum cloaca strains more than lesion strains.Enterococcus cecorum lesion strains are resistant to high concentrations of lysozyme.Lysozyme resistance could enhance survival in albumen and body fluids.
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Affiliation(s)
- Thijs Manders
- Faculty of Veterinary Medicine, Department of Population Health Sciences, Utrecht University, Utrecht, the Netherlands
| | - Lindert Benedictus
- Faculty of Veterinary Medicine, Department of Population Health Sciences, Utrecht University, Utrecht, the Netherlands
| | - Mirlin Spaninks
- Faculty of Veterinary Medicine, Department of Population Health Sciences, Utrecht University, Utrecht, the Netherlands
| | - Mieke Matthijs
- Faculty of Veterinary Medicine, Department of Population Health Sciences, Utrecht University, Utrecht, the Netherlands
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Arango M, Forga A, Liu J, Zhang G, Gray L, Moore R, Coles M, Atencio A, Trujillo C, Latorre JD, Tellez-Isaias G, Hargis B, Graham D. Characterizing the impact of Enterococcus cecorum infection during late embryogenesis on disease progression, cecal microbiome composition, and early performance in broiler chickens. Poult Sci 2023; 102:103059. [PMID: 37717481 PMCID: PMC10507439 DOI: 10.1016/j.psj.2023.103059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/19/2023] Open
Abstract
Enterococcus cecorum (EC) has been associated with septicemia and early mortality in broiler chickens. There is limited research investigating the pathogenicity of EC field strains obtained from affected birds. The purpose of this study was to evaluate the effect of in-ovo administration into the amnion with different EC field isolates at d 18 of embryogenesis (DOE18). In Exp 1, 7 EC field isolates alone or in combination (EC1-EC3, EC4-EC5, EC6, and EC7) were selected based on phenotypic characteristics and evaluated at different concentrations (1 × 102, 1 × 104, and 1 × 106 CFU/200 µL/embryo) to assess the impact on early performance and macroscopic lesions. Three isolates (n = 3; EC2, EC5, EC7) were selected for additional evaluation based on the significant (P < 0.05) BWG reduction (d 0-21) compared to the negative control (NC) and the presence of macroscopic lesions observed during posting sessions at d 14 and d 21. An additional isolate associated with enterococcal spondylitis was included in Exp 2 (EC11B). Treatment groups for Exp 2 include: 1) NC, 2) EC2, 3) EC5, 4) EC7, and 5) EC11B (n = 90-120/embryos/group). Groups 2 to 5 were challenged at 1 × 102 CFU/200 µL/embryo by in-ovo injection into the amnion at DOE18. Chicks were placed in battery cages for the duration of the study (21 d), and pen weights were recorded at d 0, d 7, d 14, and d 21 to calculate average BW and BWG. At d 14 and d 21 posthatch, liver, spleen, free thoracic vertebrae (FTV), and femoral head (FH) were aseptically collected to enumerate Enterococcus spp. using Chromagar Orientation as the selective media. Cecal contents were collected at d 21 to evaluate the effect of EC challenge on the cecal microbiome composition. There was a significant (P < 0.05) reduction in BW at d 21, and BWG from d 14 to 21 and d 0 to 21, for EC7 and EC11B. Enterococcus cecorum was recovered from the FTV of all challenged groups at d 14 and d 21. The most representative lesions were pericarditis, hydropericardium, focal heart necrosis, and FH osteomyelitis. However, lesions were not uniform across challenged groups or ages (d 14 and d 21). Alpha diversity of the cecal contents was markedly lower in EC5 and EC11B compared to all treatment groups suggesting that EC exposure during late embryogenesis affect the cecal microbiome up to 21 d posthatch. Additionally, these results highlight the differences in pathogenicity of EC strains isolated from field cases and suggest that hatchery exposure to EC during late embryogenesis is a potential route of introduction into a flock.
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Affiliation(s)
- Marcela Arango
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Aaron Forga
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Jing Liu
- Department of Animal Science, Oklahoma State University, Stillwater, OK 74078, USA
| | - Guolong Zhang
- Department of Animal Science, Oklahoma State University, Stillwater, OK 74078, USA
| | - Latasha Gray
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Randy Moore
- UADA-Veterinary Diagnostic Laboratory, University of Arkansas, Fayetteville AR 72701, USA
| | - Makenly Coles
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Abdiel Atencio
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Carolina Trujillo
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Juan David Latorre
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Guillermo Tellez-Isaias
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Billy Hargis
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA
| | - Danielle Graham
- Division of Agriculture, Department of Poultry Science, University of Arkansas, Fayetteville AR 72701, USA.
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