Malabsorption syndrome in broilers

Rebel, Johanna M.J.; Balk, F.R.M.; Post, J.; Hemert, Saskia van; Zekarias, Bereket; Stockhofe, N.

doi:10.1079/wps200481

Cited by 22 publications

(30 citation statements)

References 60 publications

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“…RSS affects chickens early in life and is characterized by growth retardation, ruffled feathers, and diarrhea resulting in considerable economic losses especially in commercial broiler production. The syndrome is also known as malabsorption syndrome, infectious stunting syndrome, broiler runting syndrome, and helicopter syndrome [4]. Currently, there is no effective licensed vaccine against the disease, mainly because of the absence of known etiologic agent/agents.…”

Section: Introductionmentioning

confidence: 99%

Determination of the full length sequence of a chicken astrovirus suggests a different replication mechanism

et al. 2011

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The genomic RNA of a novel chicken astrovirus was determined. The full length sequence is 7520 nucleotides and encodes three open reading frames (1a, 1b, 2) for three proteins. The genomic organization was similar to other astroviruses with two exceptions. The open reading frame of the RNA-dependent RNA polymerase contains its own start codon which is different from other astroviruses described to date, providing evidence for a replication mechanism different than what has previously been described for astroviruses. Furthermore, the stem-loop structure located at the potential ribosomal frameshift signal described for other astroviruses has been shown to be a hairpin structure for the novel chicken astrovirus. Phylogenic analysis of the full length sequence revealed that this chicken astrovirus formed a branch independent from other astroviruses, indicating that this astrovirus is significantly different from astroviruses described to date.

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Section: Introductionmentioning

confidence: 99%

Determination of the full length sequence of a chicken astrovirus suggests a different replication mechanism

et al. 2011

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“…Runting stunting syndrome (RSS) was first described in 1940s, then became popular to the commercial industry and has been reported variously around the world since 1970s [2]. RSS had caused economic hardships in the poultry industry through reduced uniformity, reduced livability, decreased body weights, elevated feed conversions, and many secondary diseases [3].…”

Section: Introductionmentioning

confidence: 99%

“…Infectious agents mostly viruses have been isolated as etiological agents, specifically rotaviruses, reoviruses, astroviruses, and some other small rounded viruses present in the intestines and intestinal contents of infected chicks by using some isolation techniques or direct electron microscopy [10]. Secondary bacteria are often isolated from the intestines of RSS affected birds [2]. The objective of the present study was to study the histopathological changes due to runting stunting syndrome.…”

Section: Introductionmentioning

confidence: 99%

Histopathological Studies on Stunting Syndrome in Broilers, Lahore, Pakistan

Qamar

Aslam

Jahan

2013

Veterinary Medicine International

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Runting stunting syndrome (RSS) is a multifactorial disease with many names and faces that had caused considerable economic losses to poultry through reduced uniformity, reduced livability, decreased body weights, elevated feed conversions, and many secondary diseases. The aim of the current study was to evaluate the effect of stunting syndrome on histopathology in chicks (n = 120) of different ages collected from nine different farms. Grouping was done on the basis of age (G1 = 1–10 days, G2 = 11–20 days, G3 = 21–30 days, and G4 = 31–40 days) including both stunted and normal chicks. Histopathological findings were the intestinal lesions (29%), including degeneration of villi, crypts, epithelial cells and lamina propria. Pancreatic histopathological lesions (16.65%) included the fibrosis, vacuolation, and degeneration of acinar cells. Degeneration of follicles and epithelial cells, of bursa of fabricius (43%) and dilation of glandular cells of proventriculus including lymphocytes infiltration (5.6%) were other histopathological findings. All these changes may interfere with normal digestive processes and normal body functioning resulting in poor weight gain and retarded growth or stunting of chicks.

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“…This disorder (also known as malabsorption syndrome and as runting-stunting syndrome or RSS) is a multifactorial disease of chickens which results in gastrointestinal alterations along with elevated feed conversion and decreased body weight (Rebel et al 2006, Saif 2013, Nuñez et al 2016a, Nuñez et al 2016b). Bacterial, protozoal and viral agents are known to be involved in the development of outbreaks, which are also related to flock management and to the immunological status of flocks , Moura-Alvarez et al 2013, Moura-Alvarez et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Detection of enteric viruses in pancreas and spleen of broilers with runting-stunting syndrome (RSS)

et al. 2016

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RESUMO.-[Detecção de vírus entéricos em pâncreas e baço de frangos com a síndrome de nanismo e raquitismo (RSS).]A doença entérica é um problema multifatorial em galinhas que causa alterações gastrointestinais, conversão alimentar elevada e deficiência de crescimento.Nos últimos anos, os vírus entéricos foram associados à doença entérica; casos reportados mostraram a infecção de um único vírus e também infecções concomitantes durante os surtos sugerindo a presença de múltiplos fatores etiológicos nas doenças entéricas. Este estudo mostra uma alta taxa de detecção dos vírus entéricos em amostras de pâncreas e baço de um surto de enterite e má-absorção em 16 lotes de frangos (n=80 frangos). O vírus de nefrite aviá-ria (ANV) foi o vírus mais detectado, estando presente em 75% dos lotes seguido pelo rotavírus aviário grupo A (ART--A) em 68,75% dos casos, e pelo astrovirus (CAstV) e parvovírus aviários (ChPV), ambos em 43,75% das amostras. Os vírus estavam presentes no pâncreas dos lotes positivos em percentuais elevados: 100% para ART-A e CAstV; 91,7% para ANV, e em 57,14% para ChPV. Em contraste, somente 16,7% e 57,14%, em amostras de intestino, foram positivos para ANV e CAstV, respectivamente. Reovírus aviário Enteric disease is a multifactorial problem in chickens, which causes gastrointestinal alterations, elevated feed conversions and impairment. In the last years, several enteric viruses were implicated in enteric disease; case reports have shown their presence alone or in concomitant infections during outbreaks and have suggested that they might be determining factors in the aetiology of enteric disease. This study shows high detection rates of enteric viruses in the pancreas and spleen in samples from an outbreak of enteritis and malabsorption in 16 chicken flocks (n=80 broilers). Avian nephritis virus (ANV) was the most ubiquitous virus, present in 75% of the flocks followed by avian rotavirus group A (ART-A) with 68.75%, and by chicken astrovirus (CAstV) and chicken parvovirus (ChPV) in 43.75% of samples. Viruses were present in the pancreas of positive flocks at extremely high rates: 100% for ART-A, 91.7% for ANV, 100% for CAstV and 57.14% for ChPV. By contrast, only 16.7% and 57.14% of intestine samples were positive for ANV and CAstV, respectively. Avian reovirus (AReo) and avian adenovirus group 1 (FAdV-1) were not detected. These results suggest that high viral detection rates in pancreas samples may be a result of viremia during enteric disease, with subsequent damage of the exocrine pancreas, leading to runting-stunting syndrome (RSS).INDEX TERMS: Broiler, enteric viruses, detection, pancreas, spleen, runting-stunting syndrome, RSS.

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Malabsorption syndrome in broilers

Abstract: Malabsorption syndrome (MAS) is a multifactorial disease that causes intestinal disorders in broilers due

Cited by 22 publications

References 60 publications

Determination of the full length sequence of a chicken astrovirus suggests a different replication mechanism

Determination of the full length sequence of a chicken astrovirus suggests a different replication mechanism

Histopathological Studies on Stunting Syndrome in Broilers, Lahore, Pakistan

Detection of enteric viruses in pancreas and spleen of broilers with runting-stunting syndrome (RSS)

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