Clinical and Gross Pathological Investigations of Internal Laying in Commercial Layer Chicken

Srinivasan, Prasanna

doi:10.14737/journal.aavs/2015/3.1.71.78

Cited by 2 publications

(8 citation statements)

References 21 publications

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“…Srinivasan et al . [39] have noted “false layer” syndrome as an explanatory indication of poultry health condition that may show a normal egg production but actually infected. The infection can be confirmed during a necropsy, in which the body cavity of a chicken is filled with fluids or coagulated yolk.…”

Section: Discussionmentioning

confidence: 99%

“…Meanwhile, Srinivasan et al . [39] have also noted penguin-like stance as probably being caused by progressive accumulation yolk material, partially or fully along with an inflammatory exudate in the abdominal cavity. Then, a discovery of ovarian cyst alongside drops in egg production at chicken samples is also indications of “false layer” syndrome, as suggested by Landman et al .…”

Section: Discussionmentioning

confidence: 99%

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Molecular characterization of pathogenic 4/91-like and QX-like infectious bronchitis virus infecting commercial poultry farms in Indonesia

2019

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Background and Aim: Existing data on the characteristics of infectious bronchitis virus (IBV) gathered throughout Indonesia have been recognized to indicate variants similar to globally distributed vaccine strains. Despite past and current intensive vaccination programs, IBV infections in the country's poultry industry have not been effectively controlled. Therefore, this study aimed to investigate the genotype of several isolates based on partial S1 gene sequences. In particular, the investigation is directed to focus on layer chickens in actively vaccinated farms indicating IBV symptoms. Materials and Methods: Samples were isolated from ten different layer chicken flocks experiencing respiratory problem, drops in egg production, and a "penguin-like" stance, which were collected from commercial poultry farms in Central Java and Yogyakarta regions, Indonesia, within the periods of 2012-2018. Fragment of the S1 gene of IBV sampled from actively vaccinated commercial poultry farms was amplified using primer 5'-aca tgg taa ttt ttc aga tgg-3' (forward) and 5'-cag att gct tac aac cac c-3' (reverse) with the length of polymerase chain reaction (PCR) product at 383 bp. The sequence of samples was then compared with the sequence of reference S1 gene nucleotides of IBV from NCBI GenBank database. The amino acid analysis and multiple alignment sequence were conducted using Mega X. Results: During necropsy, enlargement of the oviduct and swollen kidney were observed. Reverse transcription-PCR diagnosis of their 383 bp S1 gene showed that all samples were IBV positive. Phylogenetic analysis of the S1 gene discovered seven samples to be clustered as 4/91-like strains. Meanwhile, the remaining three samples were grouped in QX-like strain cluster. Conclusion: This study is a pioneering report providing molecular evidence of pathogenic QX-like and 4/91-like strains circulating in Indonesia. Findings discovered, in this study, strongly suggested the importance of improving protections by available IBV vaccines through updated circulating strain clusters. It is critical to ensure the delivery of an effective control measurement of and vaccination protocols against IBV infections in the country's commercial poultry industry in particular and worldwide in general.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Molecular characterization of pathogenic 4/91-like and QX-like infectious bronchitis virus infecting commercial poultry farms in Indonesia

2019

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“…Caged layer fatigue owing to the excess demand for calcium for frequent egg laying includes not only osteopenia but also oviductal inertia because muscle contraction requires calcium [3]. Laying hens spontaneously increase the risk of ovarian cancer with aging, along with decreased egg productivity [4,5]. In addition to genetic factors, rearing circumstances, aging, and infectious diseases also affect the reproductive function of laying hens.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to genetic factors, rearing circumstances, aging, and infectious diseases also affect the reproductive function of laying hens. Among the common reproductive disorders in laying hens, internal laying and egg-bound syndrome are well-known to reduce egg productivity, and are fatal in severe cases [4,6].…”

Section: Introductionmentioning

confidence: 99%

“…Internal laying is a condition generally observed during inspections in poultry slaughters, where yolk and/or eggs escape into the abdominal cavity [4]. The eggs in the abdominal cavity are absorbed by the immune reaction under healthy conditions [7], whereas they lead to peritonitis under abnormal systemic conditions, including bacterial infection, malnutrition, and stress, ultimately resulting in poultry death [4].…”

Section: Introductionmentioning

confidence: 99%

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Oviduct Histopathology of Internal Laying and Egg-Bound Syndrome in Laying Hens

Hosotani

Hamano

Iwasaki

et al. 2023

Veterinary Sciences

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In the egg industry, common reproductive disorders, such as internal laying and egg-bound syndrome, not only reduce egg productivity but also cause deaths in severe cases. In this study, we focused on the oviduct histology of the pathogenesis of internal laying and egg-bound syndrome. We divided the aged laying hens into four groups according to the observation of the abdominal cavity and oviductal lumen: healthy, internal laying, egg-bound, and intercurrent. The percentages of healthy, internal laying, egg-bound, and intercurrent groups were 55%, 17.5%, 15%, and 12.5%, respectively. In all parts of the oviduct (i.e., infundibulum, magnum, isthmus, and uterus), the oviductal epithelium was composed of ciliated epithelial cells and secretory cells. The epithelial region lacking cilia was larger in the entire oviduct of the internal laying, and intercurrent groups than in the healthy group. In the internal laying, egg-bound, and intercurrent groups, significant T-cell infiltration was observed in the lamina propria of the entire oviduct. The morphological alteration of ciliated epithelial cells in the oviducts caused by inflammation may be the underlying cause of the pathogenesis of internal laying and egg-bound syndrome.

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Clinical and Gross Pathological Investigations of Internal Laying in Commercial Layer Chicken

Cited by 2 publications

References 21 publications

Molecular characterization of pathogenic 4/91-like and QX-like infectious bronchitis virus infecting commercial poultry farms in Indonesia

Molecular characterization of pathogenic 4/91-like and QX-like infectious bronchitis virus infecting commercial poultry farms in Indonesia

Oviduct Histopathology of Internal Laying and Egg-Bound Syndrome in Laying Hens

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