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A study on risk factors for macroscopic gut abnormalities in intensively reared broiler chickens*

(2020) AVIAN PATHOLOGY. 49(2). p.193-201
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Organization
Abstract
Intensification of broiler production has coincided with an increase in enteric disorders. Enteric syndromes of unknown aetiology are often associated with an increased feed conversion ratio and are given the general term "dysbiosis". Despite the importance of dysbiosis, information on factors contributing to this condition are scarce. Therefore, the aim of this study was to describe dysbiosis in broilers (Ross 308) during one production round and to identify risk factors. Fifteen farms in Flanders (Belgium) were followed up, with visits at days 10, 17, 20, 24 and 28 of production. At every visit, 10 random birds were inspected for footpad lesions, hock burns and breast blisters. Also, coccidiosis and enteric abnormalities were scored after necropsy. A gut appearance score (GAS) was given based on 10 macroscopically visible parameters, where a higher GAS equalled more enteric abnormalities. Footpad lesions were seen in 14 farms and increased in prevalence with the age of the birds. Hock burns were seen less frequently, and no breast blisters were detected. Eimeria acervulina lesions were most frequently observed, followed by E. maxima and E. tenella lesions. The average GAS increased from day 10 until day 20. The strong correlations between the GAS at days 10, 17 and 20 indicate that prevalence of gut abnormalities at day 10 can be predictive for scores later on. A higher amount of intestinal defects was seen in older female birds, in the presence of a conceivable E. tenella infection and at farms with a higher productivity and sanitary status.
Keywords
ANTIBIOTIC GROWTH PROMOTERS, FOOTPAD DERMATITIS, INTESTINAL HEALTH, ANTIMICROBIAL USE, SCORING SYSTEM, PERFORMANCE, HISTORY, SHIFTS, Broiler, coccidiosis, dysbiosis, enteric syndrome, gut appearance score, (GAS), risk factor

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Citation

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MLA
Caekebeke, Nele, et al. “A Study on Risk Factors for Macroscopic Gut Abnormalities in Intensively Reared Broiler Chickens*.” AVIAN PATHOLOGY, vol. 49, no. 2, Taylor & Francis Ltd, 2020, pp. 193–201.
APA
Caekebeke, N., Ringenier, M., De Meyer, F., Ducatelle, R., Ongena, N., Van Immerseel, F., & Dewulf, J. (2020). A study on risk factors for macroscopic gut abnormalities in intensively reared broiler chickens*. AVIAN PATHOLOGY, 49(2), 193–201.
Chicago author-date
Caekebeke, Nele, Moniek Ringenier, Fien De Meyer, Richard Ducatelle, Nikolai Ongena, Filip Van Immerseel, and Jeroen Dewulf. 2020. “A Study on Risk Factors for Macroscopic Gut Abnormalities in Intensively Reared Broiler Chickens*.” AVIAN PATHOLOGY 49 (2): 193–201.
Chicago author-date (all authors)
Caekebeke, Nele, Moniek Ringenier, Fien De Meyer, Richard Ducatelle, Nikolai Ongena, Filip Van Immerseel, and Jeroen Dewulf. 2020. “A Study on Risk Factors for Macroscopic Gut Abnormalities in Intensively Reared Broiler Chickens*.” AVIAN PATHOLOGY 49 (2): 193–201.
Vancouver
1.
Caekebeke N, Ringenier M, De Meyer F, Ducatelle R, Ongena N, Van Immerseel F, et al. A study on risk factors for macroscopic gut abnormalities in intensively reared broiler chickens*. AVIAN PATHOLOGY. 2020;49(2):193–201.
IEEE
[1]
N. Caekebeke et al., “A study on risk factors for macroscopic gut abnormalities in intensively reared broiler chickens*,” AVIAN PATHOLOGY, vol. 49, no. 2, pp. 193–201, 2020.
@article{8655293,
  abstract     = {Intensification of broiler production has coincided with an increase in enteric disorders. Enteric syndromes of unknown aetiology are often associated with an increased feed conversion ratio and are given the general term "dysbiosis". Despite the importance of dysbiosis, information on factors contributing to this condition are scarce. Therefore, the aim of this study was to describe dysbiosis in broilers (Ross 308) during one production round and to identify risk factors. Fifteen farms in Flanders (Belgium) were followed up, with visits at days 10, 17, 20, 24 and 28 of production. At every visit, 10 random birds were inspected for footpad lesions, hock burns and breast blisters. Also, coccidiosis and enteric abnormalities were scored after necropsy. A gut appearance score (GAS) was given based on 10 macroscopically visible parameters, where a higher GAS equalled more enteric abnormalities. Footpad lesions were seen in 14 farms and increased in prevalence with the age of the birds. Hock burns were seen less frequently, and no breast blisters were detected. Eimeria acervulina lesions were most frequently observed, followed by E. maxima and E. tenella lesions. The average GAS increased from day 10 until day 20. The strong correlations between the GAS at days 10, 17 and 20 indicate that prevalence of gut abnormalities at day 10 can be predictive for scores later on. A higher amount of intestinal defects was seen in older female birds, in the presence of a conceivable E. tenella infection and at farms with a higher productivity and sanitary status.},
  author       = {Caekebeke, Nele and Ringenier, Moniek and De Meyer, Fien and Ducatelle, Richard and Ongena, Nikolai and Van Immerseel, Filip and Dewulf, Jeroen},
  issn         = {0307-9457},
  journal      = {AVIAN PATHOLOGY},
  keywords     = {ANTIBIOTIC GROWTH PROMOTERS,FOOTPAD DERMATITIS,INTESTINAL HEALTH,ANTIMICROBIAL USE,SCORING SYSTEM,PERFORMANCE,HISTORY,SHIFTS,Broiler,coccidiosis,dysbiosis,enteric syndrome,gut appearance score,(GAS),risk factor},
  language     = {eng},
  number       = {2},
  pages        = {193--201},
  publisher    = {Taylor & Francis Ltd},
  title        = {A study on risk factors for macroscopic gut abnormalities in intensively reared broiler chickens*},
  url          = {http://dx.doi.org/10.1080/03079457.2019.1711019},
  volume       = {49},
  year         = {2020},
}

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