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https://hdl.handle.net/1959.11/22997
Title: | Performance, egg quality and liver lipid reserves of free-range laying hens naturally infected with Ascaridia galli | Contributor(s): | Sharma, Nisha (author); Hunt, Peter (author); Hine, Brad C (author); Sharma, Nishchal Kumar (author)![]() ![]() ![]() |
Publication Date: | 2018 | DOI: | 10.3382/ps/pey068 | Handle Link: | https://hdl.handle.net/1959.11/22997 | Abstract: | A study was conducted to determine the performance, egg quality, and liver lipid reserves of laying hens exposed to ranges contaminated with Ascaridia galli. Sixteen-week-old Lohmann Brown laying hens (n = 200) were divided into 4 treatments with 5 replicates containing 10 hens per pen. Hens of treatment 1 [negative control (NC)] ranged on a decontaminated area, and hens of treatments 2 (low infection) and 3 (medium infection) ranged on areas previously contaminated by hens artificially infected with 250 and 1,000 embryonated A. galli eggs, respectively. The hens of treatment 4 [positive control (PC)] ranged on areas previously contaminated by hens artificially infected with 2,500 embryonated A. galli eggs, and in addition these hens were orally inoculated with 1,000 embryonated eggs. Results indicated that hens of the medium infection group had a higher number of intestinal A. galli worms and A. galli eggs in the coprodeum excreta (43.9 ± 4.0 and 3,437 ± 459 eggs/g) compared to hens of the low infection group (23.8 ± 4.0 and 1,820 ± 450 eggs/g) (P < 0.01) and similar worm counts to PC hens (34.4 ± 4.0 and 2,918 ± 474) (P > 0.05). Egg production, egg mass, feed intake, and feed conversion ratio (FCR) were not affected by A. galli infection (P > 0.05). Egg quality parameters (egg weight, shell reflectivity, shell weight, shell thickness, shell percentage, shell breaking strength, deformation, albumen height, Haugh unit, and yolk score) were not affected by A. galli infection (P > 0.05). Highly infected hens had lower liver lipid content (2.72 ± 0.51 g) compared to uninfected hens (4.46 ± 0.58 g, P < 0.01). The results indicate that exposure to ranges contaminated with A. galli resulted in infection of the ranging hens, but this did not affect egg production or egg quality. Infection with A. galli lowered the liver lipid reserves of the host significantly, suggesting infected hens use more energy reserves for maintenance and production. | Publication Type: | Journal Article | Source of Publication: | Poultry Science, 97(6), p. 1914-1921 | Publisher: | Oxford University Press | Place of Publication: | United States of America | ISSN: | 1525-3171 0032-5791 |
Fields of Research (FoR) 2008: | 070299 Animal Production not elsewhere classified 070203 Animal Management 070204 Animal Nutrition |
Fields of Research (FoR) 2020: | 300302 Animal management 300303 Animal nutrition |
Socio-Economic Objective (SEO) 2008: | 830501 Eggs 970107 Expanding Knowledge in the Agricultural and Veterinary Sciences 970105 Expanding Knowledge in the Environmental Sciences |
Socio-Economic Objective (SEO) 2020: | 100601 Eggs 280101 Expanding knowledge in the agricultural, food and veterinary sciences 280111 Expanding knowledge in the environmental sciences |
Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article School of Environmental and Rural Science |
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