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Book ; Online: Legehennenfütterung

Schreiter, Ruben / Damme, Klaus

Einsatz heimischer Futtermittel : Fütterung schnabel-unkupierter Legehennen

(LfL-Information)

2017

Institution	Bayerische Landesanstalt für Landwirtschaft
Author's details	Ruben Schreiter, Dr. Klaus Damme
Series title	LfL-Information
Keywords	Legehennenhaltung ; Futtermittel ; Proteinfutter
Subject	Eiweissfutter ; Proteinfuttermittel ; Futter ; Tierfutter ; Viehfutter ; Tiernahrung ; Legehenne
Language	German
Size	1 Online-Ressource (86 Seiten), Illustrationen, Diagramme
Edition	2. Auflage
Publisher	Bayerische Landesanstalt für Landwirtschaft (LfL)
Publishing place	Freising-Weihenstephan
Publishing country	Germany
Document type	Book ; Online
HBZ-ID	HT019482197
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article ; Online: Flock-level risk factors of litter condition for the occurrence of plumage damage and skin lesions in commercial laying hen farms.

Schreiter, Ruben / Freick, Markus

Poultry science

2023 Volume 102, Issue 7, Page(s) 102705

Abstract: Plumage damage (PD) as a result of severe feather pecking (SFP) and skin lesions (SL) due to cannibalism (CA) is serious welfare, performance, and economic problems in commercial layer farms. Genetics, nutrition, and housing conditions are central ... ...

Abstract	Plumage damage (PD) as a result of severe feather pecking (SFP) and skin lesions (SL) due to cannibalism (CA) is serious welfare, performance, and economic problems in commercial layer farms. Genetics, nutrition, and housing conditions are central complexes that contribute to the multifactorial causes of these behavioral disorders. Practical recommendations consider the quality of litter as an important criterion for the prevention of SFP, although systematic longitudinal studies providing evidence-based findings are lacking. Therefore, the aim of this study was to investigate the effects of litter condition on the occurrence of PD and SL in the field using a longitudinal design. Integument scoring (PD and SL; 7 times), litter scoring (structure, cake formation, litter quality, and litter height; 12 times), and laboratory litter analysis (dry matter (DM), nitrogen (N), phosphorus (P) and pH value; 12 times) were performed in 28 laying hen flocks with a median flock size of 12,357 birds, in barn (n = 21) or free-range systems (n = 7), during the first laying period. Binary logistic regression (BLR) models showed the association of housing type and animal age on PD and SL (P < 0.001), and of the hybrid type on PD (P < 0.001). Furthermore, a significant association with PD and SL was observed for several litter traits. An increase in litter height, DM, and P was associated with lower PD (P ≤ 0.022) and SL (P < 0.001). In contrast, a higher N content of the litter was associated with an increase in SL (P = 0.007). Cake formation (P < 0.001) and a low structure (P = 0.025) of the litter showed an association with higher PD. In conclusion, this study identified caked litter with less structure, low height, and low contents of DM and P as risk factors for behavioral disorders in commercial laying flocks.
MeSH term(s)	Animals ; Female ; Chickens ; Farms ; Cannibalism ; Risk Factors ; Feathers ; Housing, Animal
Language	English
Publishing date	2023-04-07
Publishing country	England
Document type	Journal Article
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.1016/j.psj.2023.102705
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Article ; Online: Flock-level risk factors of litter condition for the occurrence of plumage damage and skin lesions in commercial laying hen farms

Schreiter, Ruben / Freick, Markus

Poultry Science 2023 July, v. 102, no. 7, p. 102705

2023 , Page(s) 102705

Abstract: Plumage damage (PD) as a result of severe feather pecking (SFP) and skin lesions (SL) due to cannibalism (CA) are serious welfare, performance, and economic problems in commercial layer farms. Genetics, nutrition, and housing conditions are central ... ...

Abstract	Plumage damage (PD) as a result of severe feather pecking (SFP) and skin lesions (SL) due to cannibalism (CA) are serious welfare, performance, and economic problems in commercial layer farms. Genetics, nutrition, and housing conditions are central complexes that contribute to the multifactorial causes of these behavioural disorders. Practical recommendations consider the quality of litter as an important criterion for the prevention of SFP, although systematic longitudinal studies providing evidence-based findings are lacking. Therefore, the aim of this study was to investigate the effects of litter condition on the occurrence of PD and SL in the field using a longitudinal design. Integument scoring (PD and SL; 7 times), litter scoring (structure, cake formation, litter quality and litter height; 12 times) and laboratory litter analysis (dry matter (DM), nitrogen (N), phosphorus (P) and pH-value; 12 times) were performed in 28 laying hen flocks with a median flock size of 12.357 birds, in barn (n=21) or free-range systems (n=7), during the first laying period. Binary logistic regression (BLR) models showed the association of housing type and animal age on PD and SL (p<0.001), and of the hybrid type on PD (p<0.001). Furthermore, a significant association with PD and SL were observed for several litter traits. An increase in litter height, DM, and P was associated with lower PD (p≤0.022) and SL (p<0.001). In contrast, a higher N content of the litter was associated with an increase in SL (p = 0.007). Cake formation (p<0.001) and a low structure (p = 0.025) of the litter showed an association with higher PD. In conclusion, this study identified caked litter with less structure, low height, and low contents of DM and P as risk factors for behavioural disorders in commercial laying flocks.
Keywords	animal age ; barns ; cannibalism ; flocks ; hens ; nitrogen ; nitrogen content ; nutrition ; phosphorus ; plumage ; regression analysis ; risk ; litter ; laying hens ; feather pecking
Language	English
Dates of publication	2023-0407
Size	p. 102705
Publishing place	Elsevier Inc.
Document type	Article ; Online
Note	Pre-press version ; Use and reproduction
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.1016/j.psj.2023.102705
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Article ; Online: Research Note: Is infrared thermography an appropriate method for early detection and objective quantification of plumage damage in white and brown feathered laying hens?

Schreiter, Ruben / Freick, Markus

Poultry science

2022 Volume 101, Issue 9, Page(s) 102022

Abstract: For the standardized assessment of plumage damage in laying hens, imaging techniques can be used in addition to visual plumage scoring (PS). In this study, the diagnostic accuracy of infrared thermography (IRT) was analyzed in white-feathered (WL) and ... ...

Abstract	For the standardized assessment of plumage damage in laying hens, imaging techniques can be used in addition to visual plumage scoring (PS). In this study, the diagnostic accuracy of infrared thermography (IRT) was analyzed in white-feathered (WL) and brown-feathered laying hens (BL) with PS as a reference. In 28 flocks, a 3-level PS and IRT were performed 8 times for the dorsal neck, back, and belly plumage. A total of 3,600 records for WL and 7,600 records for BL were available for both PS and IRT in each of the 3 body regions. Receiver operating characteristic (ROC) analyses were used to investigate diagnostic accuracy. High-accuracy detection was found for severe plumage damage on the back (WL-sensitivity: 96.0%, specificity: 98.3%; BL-sensitivity: 96.1%, specificity: 98.9%) and belly plumage (WL-sensitivity: 96.3%, specificity: 95.7%; BL-sensitivity: 95.3%, specificity: 97.2%), but insufficient accuracy for distinguishing between intact plumage and moderate plumage damage in all 3 body regions (sensitivity: 31.7-71.5%; specificity: 70.4-98.1%). The area under the curve (AUC) of the ROC graphs differed significantly between BL and WL for the back and belly plumage (P ≤ 0.05). We concluded that IRT is a suitable tool to objectively detect severe plumage damage but not for early detection of incipient plumage loss.
MeSH term(s)	Animals ; Chickens ; Feathers ; Female ; Thermography/methods ; Thermography/veterinary
Language	English
Publishing date	2022-06-28
Publishing country	England
Document type	Journal Article
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.1016/j.psj.2022.102022
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Article: Research Note: Is infrared thermography an appropriate method for early detection and objective quantification of plumage damage in white and brown feathered laying hens?

Schreiter, Ruben / Freick, Markus

Poultry science. 2022 Sept., v. 101, no. 9

2022

Abstract	For the standardized assessment of plumage damage in laying hens, imaging techniques can be used in addition to visual plumage scoring (PS). In this study, the diagnostic accuracy of infrared thermography (IRT) was analyzed in white-feathered (WL) and brown-feathered laying hens (BL) with PS as a reference. In 28 flocks, a 3-level PS and IRT were performed 8 times for the dorsal neck, back, and belly plumage. A total of 3,600 records for WL and 7,600 records for BL were available for both PS and IRT in each of the 3 body regions. Receiver operating characteristic (ROC) analyses were used to investigate diagnostic accuracy. High-accuracy detection was found for severe plumage damage on the back (WL—sensitivity: 96.0%, specificity: 98.3%; BL—sensitivity: 96.1%, specificity: 98.9%) and belly plumage (WL—sensitivity: 96.3%, specificity: 95.7%; BL—sensitivity: 95.3%, specificity: 97.2%), but insufficient accuracy for distinguishing between intact plumage and moderate plumage damage in all 3 body regions (sensitivity: 31.7–71.5%; specificity: 70.4–98.1%). The area under the curve (AUC) of the ROC graphs differed significantly between BL and WL for the back and belly plumage (P ≤ 0.05). We concluded that IRT is a suitable tool to objectively detect severe plumage damage but not for early detection of incipient plumage loss.
Keywords	neck ; plumage ; thermography
Language	English
Dates of publication	2022-09
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.1016/j.psj.2022.102022
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Detection of Bartonella schoenbuchensis (sub)species DNA in different louse fly species in Saxony, Germany: The proof of multiple PCR analysis necessity in case of ruminant-associated bartonellae determination.

Vogt, Isabelle / Schröter, Stephanie / Schreiter, Ruben / Sprong, Hein / Volfová, Karolina / Jentzsch, Matthias / Freick, Markus

Veterinary medicine and science

2024 Volume 10, Issue 3, Page(s) e1417

Abstract: Background: Hippoboscid flies are bloodsucking arthropods that can transmit pathogenic microorganisms and are therefore potential vectors for pathogens such as Bartonella spp. These Gram-negative bacteria can cause mild-to-severe clinical signs in ... ...

Abstract	Background: Hippoboscid flies are bloodsucking arthropods that can transmit pathogenic microorganisms and are therefore potential vectors for pathogens such as Bartonella spp. These Gram-negative bacteria can cause mild-to-severe clinical signs in humans and animals; therefore, monitoring Bartonella spp. prevalence in louse fly populations appears to be a useful prerequisite for zoonotic risk assessment. Methods: Using convenience sampling, we collected 103 adult louse flies from four ked species (Lipoptena cervi, n = 22; Lipoptena fortisetosa, n = 61; Melophagus ovinus, n = 12; Hippobosca equina, n = 8) and the pupae of M. ovinus (n = 10) in the federal state of Saxony, Germany. All the samples were screened by polymerase chain reaction (PCR) for Bartonella spp. DNA, targeting the citrate synthase gene (gltA). Subsequently, PCRs targeting five more genes (16S, ftsZ, nuoG, ribC and rpoB) were performed for representatives of revealed gltA genotypes, and all the PCR products were sequenced to identify the Bartonella (sub)species accurately. Results and conclusions: The overall detection rates for Bartonella spp. were 100.0%, 59.1%, 24.6% and 75.0% in M. ovinus, L. cervi, L. fortisetosa and H. equina, respectively. All the identified bartonellae belong to the Bartonella schoenbuchensis complex. Our data support the proposed reclassification of the (sub)species status of this group, and thus we conclude that several genotypes of B. schoenbuchensis were detected, including Bartonella schoenbuchensis subsp. melophagi and Bartonella schoenbuchensis subsp. schoenbuchensis, both of which have previously validated zoonotic potential. The extensive PCR analysis revealed the necessity of multiple PCR approach for proper identification of the ruminant-associated bartonellae.
MeSH term(s)	Humans ; Animals ; Diptera/genetics ; Diptera/microbiology ; Phthiraptera/genetics ; DNA, Bacterial/genetics ; Bartonella/genetics ; Ruminants/genetics ; DNA ; Germany/epidemiology ; Polymerase Chain Reaction/veterinary
Chemical Substances	DNA, Bacterial ; DNA (9007-49-2)
Language	English
Publishing date	2024-03-21
Publishing country	England
Document type	Journal Article
ZDB-ID	2819409-3
ISSN	2053-1095 ; 2053-1095
ISSN (online)	2053-1095
ISSN	2053-1095
DOI	10.1002/vms3.1417
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Effects of the poultry red mite (Dermanyssus gallinae) load on the plumage condition in commercial laying hen farms.

Schreiter, Ruben / Herzog, Marion / Freick, Markus

PloS one

2022 Volume 17, Issue 11, Page(s) e0277513

Abstract: Plumage damage (PD) resulting from severe feather pecking (SFP) is a significant problem for animal welfare, performance, and economics in commercial laying hen farms. Genetics, nutrition, and housing conditions are central complexes that contribute to ... ...

Abstract	Plumage damage (PD) resulting from severe feather pecking (SFP) is a significant problem for animal welfare, performance, and economics in commercial laying hen farms. Genetics, nutrition, and housing conditions are central complexes that contribute to the multifactorial cause of SFP. Practical experience suggests that infestation by the poultry red mite (PRM), which is the most severe ectoparasite of laying hens in cage-free housing systems, may be a risk factor for the occurrence of PD, although evidence-based findings are lacking. The objective of this longitudinal observational field study was to investigate the effects of PRM infestation of commercial laying flocks on the occurrence of PD. Integument scoring (plumage damage and skin lesions) and the quantification of PRM infestation using mite traps were conducted during the laying period of 28 laying flocks, with an average flock size of 12,357 birds in barn (n = 21) or free-range (n = 7) systems. Across all flocks and survey times, the median PRM mass per trap was 0.7 mg (1.-3. quartile: 0.0-19.3 mg/trap), corresponding to a median count of 65.2 mites/trap (1.-3. quartile: 0.0-246.8 mites/trap). Binary logistic regression models revealed an association between PD and skin lesions with hen age, housing system, and hybrid type (p<0.001). The PRM load also affected the plumage condition, where PD increased with increasing PRM infestation (p<0.001). In addition, the PRM load tended to have an effect on skin injuries (p = 0.097). In conclusion, this longitudinal study identified the PRM load in laying hen flocks as a risk factor for PD.
MeSH term(s)	Animals ; Female ; Chickens/parasitology ; Poultry ; Poultry Diseases/epidemiology ; Poultry Diseases/parasitology ; Farms ; Longitudinal Studies ; Mites ; Mite Infestations/epidemiology ; Mite Infestations/veterinary ; Mite Infestations/parasitology ; Trombiculidae
Language	English
Publishing date	2022-11-11
Publishing country	United States
Document type	Observational Study ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0277513
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Relation between Feed Particle Size Distribution and Plumage Condition in Laying Hens on Commercial Farms

Schreiter, Ruben / Damme, Klaus / Freick, Markus

Animals. 2021 Mar. 11, v. 11, no. 3

2021

Abstract: In this cross-sectional study, 103 complete feed samples from laying hen herds affected by plumage damage as an indirect measure for severe feather pecking (affected herds; AH, n = 37) and control herds without plumage damage (control herd; CH, n = 66) ... ...

Abstract	In this cross-sectional study, 103 complete feed samples from laying hen herds affected by plumage damage as an indirect measure for severe feather pecking (affected herds; AH, n = 37) and control herds without plumage damage (control herd; CH, n = 66) of commercial German farms were examined by dry sieve and nutrient analysis. AH showed higher percentages of particles >2.50 mm (mean ± SD, CH: 11.0 ± 8.5%, AH: 24.9 ± 14.3%) and 2.00–2.50 mm (CH: 11.2 ± 5.3%, AH: 15.7 ± 5.7%), but lower proportions of fractions 1.01–1.60 mm (CH: 22.9 ± 4.9%, AH: 17.8 ± 5.7%), 0.51–1.00 mm (CH: 25.5 ± 8.2%, AH: 16.0 ± 6.8%) and ≤0.50 mm (CH: 15.4 ± 5.0%, AH: 11.0 ± 4.8%) (p < 0.001). Diets of AH had a higher geometric mean diameter (GMD) compared to CH (AH: 1470.8 ± 343.9 μm; CH: 1113.3 ± 225.7 μm) (p < 0.001). Contents of crude ash (CH: 130.3 ± 18.8 g/kg, AH: 115.9 ± 24.3 g/kg), lysine (CH: 8.2 ± 1.0 g/kg, AH: 7.7 ± 1.2 g/kg), methionine (CH: 3.4 ± 0.5 g/kg, AH: 3.2 ± 0.6 g/kg) and sodium (CH: 1.7 ± 0.4 g/kg, AH: 1.3 ± 0.4 g/kg) were lower in AH (p ≤ 0.041). In a logistic regression model, animal age (p = 0.041) and GMD (p < 0.001) were significant factors on the occurrence of plumage damage.
Keywords	animal age ; cross-sectional studies ; herds ; lysine ; methionine ; particle size distribution ; plumage ; regression analysis ; sodium
Language	English
Dates of publication	2021-0311
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
Note	NAL-light
ISSN	2076-2615
DOI	10.3390/ani11030773
Database	NAL-Catalogue (AGRICOLA)

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Article: Relation between Feed Particle Size Distribution and Plumage Condition in Laying Hens on Commercial Farms.

Schreiter, Ruben / Damme, Klaus / Freick, Markus

Animals : an open access journal from MDPI

2021 Volume 11, Issue 3

Abstract: In this cross-sectional study, 103 complete feed samples from laying hen herds affected by plumage damage as an indirect measure for severe feather pecking (affected herds; AH, ...

Abstract	In this cross-sectional study, 103 complete feed samples from laying hen herds affected by plumage damage as an indirect measure for severe feather pecking (affected herds; AH,
Language	English
Publishing date	2021-03-11
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2606558-7
ISSN	2076-2615
ISSN	2076-2615
DOI	10.3390/ani11030773
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Article: Avian leukosis virus (ALV) is highly prevalent in fancy-chicken flocks in Saxony

Freick, Markus / Schreiter, Ruben / Weber, Jim / Vahlenkamp, Thomas W. / Heenemann, Kristin

Archives of virology. 2022 Apr., v. 167, no. 4

2022

Abstract: The current prevalence of avian leukosis virus (ALV) in fancy chickens in Germany is unknown. Therefore, 537 cloacal swabs from 50 purebred fancy-chicken flocks in Saxony were tested for the presence of the ALV p27 protein using a commercial antigen- ... ...

Abstract	The current prevalence of avian leukosis virus (ALV) in fancy chickens in Germany is unknown. Therefore, 537 cloacal swabs from 50 purebred fancy-chicken flocks in Saxony were tested for the presence of the ALV p27 protein using a commercial antigen-capture ELISA. The detection rate was 28.7% at the individual-animal level and 56.0% at the flock level. Phylogenetic analysis of PCR products obtained from 22 different flocks revealed the highest similarity to ALV subtype K. When classifying breeds by their origin, ALV detection rates differed significantly. Evaluation of questionnaire data revealed no significant differences between ALV-positive and negative flocks regarding mortality.
Keywords	Avian leukosis virus ; cloaca ; flocks ; mortality ; phylogeny ; purebreds ; questionnaires ; virology ; Germany
Language	English
Dates of publication	2022-04
Size	p. 1169-1174.
Publishing place	Springer Vienna
Document type	Article
ZDB-ID	7491-3
ISSN	1432-8798 ; 0304-8608
ISSN (online)	1432-8798
ISSN	0304-8608
DOI	10.1007/s00705-022-05404-y
Database	NAL-Catalogue (AGRICOLA)

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