1
|
Karami M, Goudarztalejerdi A, Mohammadzadeh A, Berizi E. In vitro evaluation of two novel Escherichia bacteriophages against multiple drug resistant avian pathogenic Escherichia coli. BMC Infect Dis 2024; 24:497. [PMID: 38755537 PMCID: PMC11100137 DOI: 10.1186/s12879-024-09402-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 05/13/2024] [Indexed: 05/18/2024] Open
Abstract
BACKGROUND In recent years, there has been a growing interest in phage therapy as an effective therapeutic tool against colibacillosis caused by avian pathogenic Escherichia coli (APEC) which resulted from the increasing number of multidrug resistant (MDR) APEC strains. METHODS In the present study, we reported the characterization of a new lytic bacteriophage (Escherichia phage AG- MK-2022. Basu) isolated from poultry slaughterhouse wastewater. In addition, the in vitro bacteriolytic activity of the newly isolated phage (Escherichia phage AG- MK-2022. Basu) and the Escherichia phage VaT-2019a isolate PE17 (GenBank: MK353636.1) were assessed against MDR- APEC strains (n = 100) isolated from broiler chickens with clinical signs of colibacillosis. RESULTS Escherichia phage AG- MK-2022. Basu belongs to the Myoviridae family and exhibits a broad host range. Furthermore, the phage showed stability under a wide range of temperatures, pH values and different concentrations of NaCl. Genome analysis of the Escherichia phage AG- MK-2022. Basu revealed that the phage possesses no antibiotic resistance genes (ARGs), mobile genetic elements (MGEs), and any E. coli virulence associated genes. In vitro bacterial challenge tests demonstrated that two phages, the Escherichia phage VaT-2019a isolate PE17 and the Escherichia phage AG- MK-2022. Basu exhibited high bactericidal activity against APEC strains and lysed 95% of the tested APEC strains. CONCLUSIONS The current study findings indicate that both phages could be suggested as safe biocontrol agents and alternatives to antibiotics for controlling MDR-APEC strains isolated from broilers.
Collapse
Affiliation(s)
- Mobina Karami
- Department of Pathobiology, Faculty of Veterinary Medicine, Bu-Ali Sina University, Hamedan, 6517658978, Iran
| | - Ali Goudarztalejerdi
- Department of Pathobiology, Faculty of Veterinary Medicine, Bu-Ali Sina University, Hamedan, 6517658978, Iran.
| | - Abdolmajid Mohammadzadeh
- Department of Pathobiology, Faculty of Veterinary Medicine, Bu-Ali Sina University, Hamedan, 6517658978, Iran
| | - Enayat Berizi
- Department of Food Hygiene and Quality Control, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| |
Collapse
|
2
|
Zou Q, Meng W, Wang C, Wang T, Liu X, Li D. Sodium dichloroisocyanurate: improving broiler health by reducing harmful microbial levels in the waterline. Front Vet Sci 2023; 10:1234949. [PMID: 37588972 PMCID: PMC10427219 DOI: 10.3389/fvets.2023.1234949] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/21/2023] [Indexed: 08/18/2023] Open
Abstract
Sodium dichloroisocyanurate (NaDCC) is commonly used for treating drinking water, industrial water, and wastewater. This study aimed to investigate the potential effects of NaDCC-treated waterline drinking water on the growth of AA+ broilers by reducing microbial levels in the waterline. A total of 480 healthy 1-day-old AA+ broilers (46.77 ± 0.50 g) were selected for the experiment and randomly divided into four groups with six replicates of 20 birds each. The control group received regular drinking water, while the test groups received drinking water with NaDCC concentrations of 10, 30, and 50 mg/L. The test groups consumed the treated water on specific days throughout the 42-day experimental period. Results showed that NaDCC treatment significantly reduced the levels of E. coli, Salmonella, S. aureus and Moulds in the drinking water at the waterline (p < 0.05). Drinking water with NaDCC also led to reduced broiler fecal emissions of NH3 and H2S, as well as reduced counts of E. coli, Salmonella, S. aureus and Moulds (p < 0.05), particularly at 30 mg/L and 50 mg/L concentrations. Broilers consuming NaDCC at 50 mg/L exhibited a significant increase in ADG from days 1-42 (p < 0.05). The levels of E. coli, Salmonella, S. aureus and Moulds in the drinking water at the waterline were significantly and positively correlated with the bacterial count in the feces (p < 0.05, R > 0.6). Additionally, bacterial levels in drinking water and broiler feces were negatively correlated with broiler production performance indicators, including ADG, ADFI, F/G and AWC. In conclusion, NaDCC can indirectly enhance broiler performance by reducing the levels of harmful bacteria in the waterline without affecting normal drinking water. The addition of 30 mg/L or 50 mg/L of NaDCC to the waterline in poultry production can effectively control harmful microorganisms and improve poultry health. Based on the experiment's results, it is recommended to preferentially use 30 mg/L NaDCC in the waterline to reduce farming costs.
Collapse
Affiliation(s)
- Qiangqiang Zou
- College of Animal Husbandry and Veterinary Medicine, Jinzhou Medical University, Jinzhou, China
| | - Weishuang Meng
- College of Animal Husbandry and Veterinary Medicine, Jinzhou Medical University, Jinzhou, China
| | - Chunqiang Wang
- College of Animal Husbandry and Veterinary Medicine, Jinzhou Medical University, Jinzhou, China
| | - Tieliang Wang
- College of Animal Husbandry and Veterinary Medicine, Jinzhou Medical University, Jinzhou, China
- Liaoning Kaiwei Biotechnology Co., Ltd., Jinzhou, China
| | - Xiao Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - Desheng Li
- College of Animal Husbandry and Veterinary Medicine, Jinzhou Medical University, Jinzhou, China
| |
Collapse
|
3
|
Sattar S, Bailie M, Yaqoob A, Khanum S, Fatima K, Altaf AURB, Ahmed I, Shah STA, Munawar J, Zehra QA, Daud S, Arshad A, Imdad K, Javed S, Tariq A, Bostan N, Altermann E. Characterization of two novel lytic bacteriophages having lysis potential against MDR avian pathogenic Escherichia coli strains of zoonotic potential. Sci Rep 2023; 13:10043. [PMID: 37340022 DOI: 10.1038/s41598-023-37176-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 06/17/2023] [Indexed: 06/22/2023] Open
Abstract
Avian pathogenic E. coli (APEC) is associated with local and systemic infections in poultry, ducks, turkeys, and many other avian species, leading to heavy economical losses. These APEC strains are presumed to possess zoonotic potential due to common virulence markers that can cause urinary tract infections in humans. The prophylactic use of antibiotics in the poultry sector has led to the rapid emergence of Multiple Drug Resistant (MDR) APEC strains that act as reservoirs and put human populations at risk. This calls for consideration of alternative strategies to decrease the bacterial load. Here, we report isolation, preliminary characterization, and genome analysis of two novel lytic phage species (Escherichia phage SKA49 and Escherichia phage SKA64) against MDR strain of APEC, QZJM25. Both phages were able to keep QZJM25 growth significantly less than the untreated bacterial control for approximately 18 h. The host range was tested against Escherichia coli strains of poultry and human UTI infections. SKA49 had a broader host range in contrast to SKA64. Both phages were stable at 37 °C only. Their genome analysis indicated their safety as no recombination, integration and host virulence genes were identified. Both these phages can be good candidates for control of APEC strains based on their lysis potential.
Collapse
Affiliation(s)
- Sadia Sattar
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan.
| | - Marc Bailie
- AgResearch, Palmerston North, 4410, New Zealand
| | - Akasha Yaqoob
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | | | - Kaniz Fatima
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Anees Ur Rehman Bin Altaf
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Ibrar Ahmed
- Alpha Genomics Private Limited, Islamabad, 45710, Pakistan
| | - Syed Tahir Abbas Shah
- Functional Genomics Lab, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Javeria Munawar
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Quaratul Ain Zehra
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Sajeela Daud
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Ayesha Arshad
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Kaleem Imdad
- Microbiology and Immunology Lab, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Sundus Javed
- Microbiology and Immunology Lab, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Amira Tariq
- Microbiology and Immunology Lab, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Nazish Bostan
- Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad, 45550, Pakistan
| | - Eric Altermann
- School of Veterinary Science Massey University Centre for Bioparticle Applications, Massey University, Palmerston North, 4472, New Zealand
| |
Collapse
|
4
|
Cuta L, Baums CG, Cramer K, Harzer M, Hauptmann J, Heenemann K, Krautwald-Junghanns ME, Stegmaier I, Vahlenkamp TW, Schmidt V. An Explorative Study of the Causal Pathogenesis of Green Liver Discoloration in Organically Reared Female Bronze Turkeys ( Meleagris gallopavo) Considering the Infectious Risk Factors. Animals (Basel) 2023; 13:ani13050918. [PMID: 36899775 PMCID: PMC10000099 DOI: 10.3390/ani13050918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/27/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
A recent study revealed that organically raised Bronze turkeys showed a high prevalence of green liver discoloration. This alteration is commonly associated with the Turkey Osteomyelitis Complex and potentially caused by opportunistic bacteria. Therefore, 360 organically fattened Bronze turkeys were examined post-mortem throughout two fattening trials with two examinations each to determine possible infectious risk factors and reduce disease prevalence. Clinical and pathoanatomical examinations were performed on every hen. Histopathological, bacteriological, parasitological, and virological examinations were performed on at least six hens without and, if applicable, six hens with green livers on each examination date. Overall, 9.0% of all hens had a green liver without a correlation with bacterial or parasitological findings but multiple health impairments. The discoloration correlated significantly with the detection of immunosuppressive turkey hemorrhagic enteritis virus at the early stage and macro- and histological joint/bone lesions at the late fattening stage, indicating the presence of two different predisposing pathogeneses. Flocks not being vaccinated against hemorrhagic enteritis but having a virus-positive sample showed the highest prevalence of green liver discoloration and developed worse in various parameters. In conclusion, an adequate vaccination schedule and the prevention of field infections may lead to a decreased risk of performance reduction and improved animal health.
Collapse
Affiliation(s)
- Larissa Cuta
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 17, 04103 Leipzig, Germany
- Correspondence: ; Tel.: +49-(0)341-9738405
| | - Christoph Georg Baums
- Institute of Bacteriology and Mycology, Faculty of Veterinary Medicine, University Leipzig, An den Tierkliniken 29, 04103 Leipzig, Germany
| | - Kerstin Cramer
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 17, 04103 Leipzig, Germany
| | - Maxi Harzer
- Institute of Virology, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 29, 04103 Leipzig, Germany
| | - Jutta Hauptmann
- Institute of Bacteriology and Mycology, Faculty of Veterinary Medicine, University Leipzig, An den Tierkliniken 29, 04103 Leipzig, Germany
| | - Kristin Heenemann
- Institute of Virology, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 29, 04103 Leipzig, Germany
| | | | - Ines Stegmaier
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 17, 04103 Leipzig, Germany
| | - Thomas W. Vahlenkamp
- Institute of Virology, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 29, 04103 Leipzig, Germany
| | - Volker Schmidt
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken 17, 04103 Leipzig, Germany
| |
Collapse
|
5
|
Szafraniec GM, Szeleszczuk P, Dolka B. Review on skeletal disorders caused by Staphylococcus spp. in poultry. Vet Q 2022; 42:21-40. [PMID: 35076352 PMCID: PMC8843168 DOI: 10.1080/01652176.2022.2033880] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 12/03/2021] [Accepted: 01/21/2022] [Indexed: 12/17/2022] Open
Abstract
Lameness or leg weakness is the main cause of poor poultry welfare and serious economic losses in meat-type poultry production worldwide. Disorders related to the legs are often associated with multifactorial aetiology which makes diagnosis and proper treatment difficult. Among the infectious agents, bacteria of genus Staphylococcus are one of the most common causes of bone infections in poultry and are some of the oldest bacterial infections described in poultry. Staphylococci readily infect bones and joints and are associated with bacterial chondronecrosis with osteomyelitis (BCO), spondylitis, arthritis, tendinitis, tenosynovitis, osteomyelitis, turkey osteomyelitis complex (TOC), bumblefoot, dyschondroplasia with osteomyelitis and amyloid arthropathy. Overall, 61 staphylococcal species have been described so far, and 56% of them (34/61) have been isolated from clinical cases in poultry. Although Staphylococcus aureus is the principal cause of poultry staphylococcosis, other Staphylococcus species, such as S. agnetis, S. cohnii, S. epidermidis, S. hyicus, S. simulans, have also been isolated from skeletal lesions. Antimicrobial treatment of staphylococcosis is usually ineffective due to the location and type of lesion, as well as the possible occurrence of multidrug-resistant strains. Increasing demand for antibiotic-free farming has contributed to the use of alternatives to antibiotics. Other prevention methods, such as better management strategies, early feed restriction or use of slow growing broilers should be implemented to avoid rapid growth rate, which is associated with locomotor problems. This review aims to summarise and address current knowledge on skeletal disorders associated with Staphylococcus spp. infection in poultry.
Collapse
Affiliation(s)
- Gustaw M. Szafraniec
- Department of Pathology and Veterinary Diagnostics, Institute of Veterinary Medicine, Warsaw University of Life Sciences – SGGW, Warsaw, Poland
| | - Piotr Szeleszczuk
- Department of Pathology and Veterinary Diagnostics, Institute of Veterinary Medicine, Warsaw University of Life Sciences – SGGW, Warsaw, Poland
| | - Beata Dolka
- Department of Pathology and Veterinary Diagnostics, Institute of Veterinary Medicine, Warsaw University of Life Sciences – SGGW, Warsaw, Poland
| |
Collapse
|
6
|
Osteomyelitis in a slaughter turkey flock caused by Yersinia pseudotuberculosis sequence type ST42. Vet Microbiol 2022; 269:109424. [DOI: 10.1016/j.vetmic.2022.109424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/27/2022] [Accepted: 04/01/2022] [Indexed: 11/22/2022]
|
7
|
Pang K, Wang S, Li M, Zhou Z. Autophagy in Femoral Head Necrosis of Broilers Bone Metabolism Parameters and Autophagy-Related Gene Expression in Femoral Head Necrosis Induced by Glucocorticoid in Broilers. Front Vet Sci 2021; 8:746087. [PMID: 34796226 PMCID: PMC8592919 DOI: 10.3389/fvets.2021.746087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 10/07/2021] [Indexed: 11/22/2022] Open
Abstract
Objectives: In this study, the influence of methylprednisolone (MP) and 3-methyladenine (3-MA) on chondrocyte autophagy and bone quality were determined to investigate the mechanisms of femoral head necrosis in broilers. Methods: Chickens were divided into four groups: control, MP, 3-MA, and 3-MA+MP groups. Blood and bone samples were collected for biochemistry assay and bone quality determination. Cartilage was separated from the femoral head for histopathological analysis and gene expression detection. Results: The results indicated that MP treatment significantly affected blood levels of alkaline phosphatase, high-density lipoprotein, calcium, phosphorus, bone alkaline phosphatase, and osteocalcin in broilers. Additionally, MP treatment significantly increased blood levels of cholesterol, low-density lipoprotein, triglyceride, carboxy-terminal telopeptide of type-I collagen, and tartrate-resistant acid phosphatase 5. MP treatment also significantly decreased the levels of bone parameters compared with these values in controls, inhibited the expression of collagen-2, aggrecan, and mammalian target of rapamycin, and increased the expression of beclin1 and microtubule-associated protein 1 light chain 3, hypoxia-inducible factor 1 alpha, phosphoinositide 3-kinase, protein kinase B and autophagy-related gene 5 of the femoral head. Furthermore, following co-treatment with 3-MA and MP, 3-MA mitigated the effects of MP. Conclusions: Our findings demonstrated that autophagy may be involved in the pathogenesis of femoral head necrosis induced by MP in broilers, and this study provides new treatment and prevention ideas for femoral head necrosis caused by glucocorticoids.
Collapse
Affiliation(s)
- Kaiyi Pang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Shujie Wang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Meng Li
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Zhenlei Zhou
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| |
Collapse
|
8
|
Investigation of the occurrence of pathological carcass alterations at the processing plant in meat turkeys reared in organic production systems in Germany. J APPL POULTRY RES 2021. [DOI: 10.1016/j.japr.2021.100145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
9
|
Szafraniec GM, Szeleszczuk P, Dolka B. A Review of Current Knowledge on Staphylococcus agnetis in Poultry. Animals (Basel) 2020; 10:ani10081421. [PMID: 32823920 PMCID: PMC7460464 DOI: 10.3390/ani10081421] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 08/03/2020] [Accepted: 08/11/2020] [Indexed: 12/15/2022] Open
Abstract
Simple Summary This literature review provides a synthesis and evaluation of the current knowledge on Staphylococcus agnetis (S. agnetis) and its implications in poultry pathology. Recent studies revealed that S. agnetis can cause bacterial chondronecrosis with osteomyelitis (BCO), endocarditis, and septicemia in broiler chickens. Lameness constitutes one of the major health and welfare problems causing huge economic losses in the poultry industry. To date, a range of infectious and non-infectious factors have been associated with lameness in poultry. Among bacteria of the genus Staphylococcus, Staphylococcus aureus is the main species associated with locomotor problems. This contrasts with S. agnetis, which until recently had not been considered as a poultry pathogen. Previously only reported in cattle, S. agnetis has expanded its host range to chickens, and due to its unique characteristics has become recognized as a new emerging pathogen. The genotypic and phenotypic similarities between S. agnetis and other two staphylococci (S. hyicus and S. chromogenes) make this pathogen capable of escaping recognition due to misidentification. Although a significant amount of research on S. agnetis has been conducted, many facts about this novel species are still unknown and further studies are required to understand its full significance in poultry pathology. Abstract This review aims to summarize recent discoveries and advancements regarding the characteristics of Staphylococcus agnetis (S. agnetis) and its role in poultry pathology. S. agnetis is an emerging pathogen that was primarily associated with mastitis in dairy cattle. After a presumed host jump from cattle to poultry, it was identified as a pathological agent in broiler chickens (Gallus gallus domesticus), causing lameness induced by bacterial chondronecrosis with osteomyelitis (BCO), septicemia, and valvular endocarditis. Economic and welfare losses caused by lameness are global problems in the poultry industry, and S. agnetis has been shown to have a potential to induce high incidences of lameness in broiler chickens. S. agnetis exhibits a distinct repertoire of virulence factors found in many different staphylococci. It is closely related to S. hyicus and S. chromogenes, hence infections caused by S. agnetis may be misdiagnosed or even undiagnosed. As there are very few reports on S. agnetis in poultry, many facts about its pathogenesis, epidemiology, routes of transmission, and the potential impacts on the poultry industry remain unknown.
Collapse
|
10
|
Eladl AH, Arafat N, El-Shafei RA, Farag VM, Saleh RM, Awadin WF. Comparative immune response and pathogenicity of the H9N2 avian influenza virus after administration of Immulant ®, based on Echinacea and Nigella sativa, in stressed chickens. Comp Immunol Microbiol Infect Dis 2019; 65:165-175. [PMID: 31300109 DOI: 10.1016/j.cimid.2019.05.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 12/21/2022]
Abstract
Avian influenza vaccines are commonly used in the poultry industry, and some medicinal plants can increase the efficacy of such vaccines. The objective of this study was to evaluate the effect of Immulant® (IMU) (a commercial product based on Echinacea and Nigella sativa) on stress induced by dexamethasone (DEX) in chickens vaccinated (VAC) against the H9N2 avian influenza virus (AIV-H9N2). Seven experimental groups were included: the negative control, VAC, DEX, VAC + DEX, VAC + DEX + IMU, VAC + IMU and IMU groups. The vaccinated chickens (at 10 days of age) were injected daily with DEX for three days pre-vaccination and for three days pre-challenge and orally administered 1% IMU for 6 weeks post-vaccination (PV). The chickens were then challenged intranasally with AIV-H9N2 at 28 days PV. Serum, blood, tracheal and cloacal swabs and tissue samples were collected in the 1st and 4th weeks PV and at different time points post-challenge. The results showed significant changes (P ≤ 0.05) in oxidative stress and antioxidant biomarkers (malondialdehyde, nitric oxide and reduced glutathione), haematological and immunological parameters, final live weights, relative organ weights and histopathological lesions between the VAC+DEX group and the VAC group. Moreover, IMU significantly increased protection rates post-challenge, HI antibody titers and heterophil phagocytic activity and decreased DEX-induced stress and virus shedding titers. In conclusion, oral administration of 1% IMU for six weeks can enhance the immune response after AI-H9N2 vaccination and reduce the pathogenicity of infection in stressed chickens.
Collapse
Affiliation(s)
- Abdelfattah H Eladl
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
| | - Nagah Arafat
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Reham A El-Shafei
- Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Verginia M Farag
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Rasha M Saleh
- Department of Physiology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Walaa F Awadin
- Department of Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| |
Collapse
|
11
|
Freihold D, Bartels T, Bergmann S, Berk J, Deerberg F, Dressel A, Erhard MH, Ermakow O, Huchler M, Krautwald-Junghanns ME, Spindler B, Thieme S, Hafez HM. Investigation of the prevalence and severity of foot pad dermatitis at the slaughterhouse in fattening turkeys reared in organic production systems in Germany. Poult Sci 2019; 98:1559-1567. [PMID: 30496524 DOI: 10.3382/ps/pey473] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 11/21/2018] [Indexed: 11/20/2022] Open
Abstract
The present study shows the prevalence and severity of foot pad dermatitis (FPD) in turkeys reared in organic production systems assessed at slaughterhouses in Germany. The investigations of altogether 1,860 turkeys of the strains Kelly Broad Breasted Bronze (Kelly BBB; 540 toms, 540 hens) and British United Turkeys (B.U.T.) 6 and the Test Product 7 (TP 7; 780 hens) showed that 97.7% of the examined turkeys were diagnosed with different degrees of FPD. Only 4.6% of the toms and 1.3% of the hens had feet without lesions. Most frequent were necrotic lesions measuring up to 2 cm in diameter (64.3% of all turkeys). Extensive necrotic lesions of the foot pads (toms: 29.8%; hens: 12.4%) and necrosis of superficial scales (toms: 11.3%; hens: 7.6%) were less frequent. Plantar abscesses were rare findings (1.9%). In general, the feet of the Kelly BBB hens were more affected by foot pad lesions than those of the Kelly BBB toms. There were significant differences between the investigated flocks concerning the occurrence of foot pad lesions. The aim in rearing turkeys must be the reduction of FPD.
Collapse
Affiliation(s)
- D Freihold
- Institute of Poultry Diseases, Faculty of Veterinary Medicine, Freie Universität Berlin, Germany.,Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, Germany
| | - T Bartels
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, Germany.,Institute of Animal Welfare and Animal Husbandry, Friedrich-Loeffler-Institut, Celle, Germany
| | - S Bergmann
- Chair of Animal Welfare, Ethology, Animal Hygiene and Animal Husbandry, Faculty of Veterinary Medicine, LMU Munich, Germany
| | - J Berk
- Institute of Animal Welfare and Animal Husbandry, Friedrich-Loeffler-Institut, Celle, Germany
| | - F Deerberg
- Oeko-Berater, Beratung & Projektmanagement Ökologischer Landbau
| | - A Dressel
- Veterinär- und Lebensmittelüberwachungsamt, Landkreis Stendal, Germany
| | - M H Erhard
- Chair of Animal Welfare, Ethology, Animal Hygiene and Animal Husbandry, Faculty of Veterinary Medicine, LMU Munich, Germany
| | - O Ermakow
- Fachdienst 39, Landkreis Ludwigslust-Parchim, Germany
| | - M Huchler
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, Germany
| | - M-E Krautwald-Junghanns
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, Germany
| | - B Spindler
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behavior, University of Veterinary Medicine Hanover, Foundation, Germany
| | - S Thieme
- Institute of Poultry Diseases, Faculty of Veterinary Medicine, Freie Universität Berlin, Germany.,Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, Germany.,Institute of Food Safety and Food Hygiene, Working Group Meat Hygiene and Technology, Faculty of Veterinary Public Health, Freie Universität Berlin, Germany
| | - H M Hafez
- Institute of Poultry Diseases, Faculty of Veterinary Medicine, Freie Universität Berlin, Germany
| |
Collapse
|
12
|
El-Senousey HK, Chen B, Wang JY, Atta AM, Mohamed FR, Nie QH. Effects of dietary vitamin C, vitamin E, and alpha-lipoic acid supplementation on the antioxidant defense system and immune-related gene expression in broilers exposed to oxidative stress by dexamethasone. Poult Sci 2018; 97:30-38. [PMID: 29077914 DOI: 10.3382/ps/pex298] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 09/14/2017] [Indexed: 12/22/2022] Open
Abstract
Vitamin C, vitamin E, and alpha-lipoic acid (ALA) are potent nutritional antioxidants, which are important for enhancing immunity. This study compared the effects of supplementation with vitamin C, vitamin E, or ALA on the antioxidant defense system and the expression of immune-related genes under oxidative stress induced by dexamethasone (DEX) in broilers. In total, 240 one-day-old female Recessive White Rock chickens were assigned randomly to either a basal diet (control group) or basal diet supplemented with vitamin C (200 mg/kg diet), vitamin E (100 mg/kg), or ALA (500 mg/kg) for 28 d starting from hatching. At 21 d of age, birds fed the ALA-supplemented diet had the highest plasma total antioxidant capacity (T-AOC) and superoxide dismutase (T-SOD) and glutathione peroxidase (GSH-PX) enzyme activities, and the lowest plasma malondialdehyde (MDA) activity, as well as the lowest mRNA gene expression levels of interferon gamma (IFN-γ) and lipopolysaccharide-induced tumor necrosis factor-alpha factor (LITAF). At 23 d of age, the broilers in the 3 treatment groups were injected in the thigh muscle with DEX for 3 alternating days. In addition, the control group was divided into 2 equal groups, in which one was injected with saline and the other was injected with DEX. At 28 d of age, the DEX-ALA group (P < 0.05) had the highest activity levels for T-AOC, T-SOD, and GSH-PX in the plasma and liver (P < 0.05), and the greatest reduction in the MDA level. Dietary ALA significantly decreased the mRNA expression levels of the interleukin 1 β (IL-1β), IL-6, IFN-γ, and LITAF genes compared with the other groups during oxidative stress by DEX. In conclusion, this study suggests that in broilers, ALA is more effective for normalizing the oxidative stress induced by DEX than vitamin C or vitamin E.
Collapse
Affiliation(s)
- H K El-Senousey
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Department of Animal Production, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - B Chen
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - J Y Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | - A M Atta
- Department of Animal Production, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - F R Mohamed
- Department of Animal Production, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - Q H Nie
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China.,Guangdong Provincial Key Lab of Agro-Animal Genomics and Molecular Breeding, South China Agricultural University, Guangzhou 510642, Guangdong, China
| |
Collapse
|
13
|
Zhang M, Shi C, Zhou Z, Hou J. Bone characteristics, histopathology, and chondrocyte apoptosis in femoral head necrosis induced by glucocorticoid in broilers. Poult Sci 2017; 96:1609-1614. [DOI: 10.3382/ps/pew466] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/03/2016] [Indexed: 12/17/2022] Open
|
14
|
Braga JFV, Chanteloup NK, Trotereau A, Baucheron S, Guabiraba R, Ecco R, Schouler C. Diversity of Escherichia coli strains involved in vertebral osteomyelitis and arthritis in broilers in Brazil. BMC Vet Res 2016; 12:140. [PMID: 27417195 PMCID: PMC5477814 DOI: 10.1186/s12917-016-0762-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 06/23/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Locomotor disorders and infections by Escherichia coli represent major concerns to the poultry industry worldwide. Avian pathogenic E. coli (APEC) is associated with extraintestinal infections leading to respiratory or systemic disease known as colibacillosis. The most common lesions seen in cases of colibacillosis are perihepatitis, airsacculitis, pericarditis, peritonitis/salpingitis and arthritis. These diseases are responsible for significant economic losses in the poultry industry worldwide. E. coli has been recently isolated from vertebral osteomyelitis cases in Brazil and there are no data on molecular and phenotypic characteristics of E. coli strains isolated from lesions in the locomotor system of broilers. This raised the question whether specific E. coli strains could be responsible for bone lesions in broilers. The aim of this study was to assess these characteristics of E. coli strains isolated from broilers presenting vertebral osteomyelitis and arthritis in Brazil. RESULTS Fifteen E. coli strains from bone lesions were submitted to APEC diagnosis and setting of ECOR phylogenic group, O serogroup, flagella type, virulence genes content, genetic patterns by Pulsed Field Gel Electrophoresis (PFGE) and Multilocus Sequence Typing (MLST). In addition, bacterial isolates were further characterized through a lethality test, serum resistance test and antibiotic resistance profile. E. coli strains harbored different genetic pattern as assessed by PFGE, regardless of flock origin and lesion site. The strains belonged to seven sequence types (STs) previously described (ST117, ST101, ST131, ST 371 and ST3107) or newly described in this study (ST5766 and ST5856). ECOR group D (66.7 %) was the most frequently detected. The strains belonged to diverse serogroups (O88, O25, O12, and O45), some of worldwide importance. The antibiotic resistance profile confirmed strains' diversity and revealed a high proportion of multidrug-resistant strains (73 %), mainly to quinolones and beta-lactams, including third generation cephalosporin. The percentage of resistance to tetracycline was moderate (33 %) but always associated with multidrug resistance. CONCLUSIONS Our results demonstrated that vertebral osteomyelitis and arthritis in broilers can be associated with highly diverse E. coli based on molecular and phenotypic characteristics. There was no specific virulence patterns of the E. coli strains associated with vertebral osteomyelitis or arthritis. Also, E. coli strains were frequently multidrug resistant and belonged to STs commonly shared by APEC and human ExPEC strains.
Collapse
Affiliation(s)
- Juliana Fortes Vilarinho Braga
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, 30161-970 Minas Gerais, Brazil
- ISP, INRA, Université François Rabelais de Tours, 37380 Nouzilly, France
| | | | - Angélina Trotereau
- ISP, INRA, Université François Rabelais de Tours, 37380 Nouzilly, France
| | - Sylvie Baucheron
- ISP, INRA, Université François Rabelais de Tours, 37380 Nouzilly, France
| | - Rodrigo Guabiraba
- ISP, INRA, Université François Rabelais de Tours, 37380 Nouzilly, France
| | - Roselene Ecco
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinárias, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, 30161-970 Minas Gerais, Brazil
| | - Catherine Schouler
- ISP, INRA, Université François Rabelais de Tours, 37380 Nouzilly, France
| |
Collapse
|
15
|
Wideman RF. Bacterial chondronecrosis with osteomyelitis and lameness in broilers: a review. Poult Sci 2016; 95:325-44. [DOI: 10.3382/ps/pev320] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 09/01/2015] [Indexed: 12/24/2022] Open
|
16
|
Packialakshmi B, Rath NC, Huff WE, Huff GR. Poultry Femoral Head Separation and Necrosis: A Review. Avian Dis 2015; 59:349-54. [PMID: 26478152 DOI: 10.1637/11082-040715-review.1] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Femoral head separation (FHS) is a degenerative skeletal problem in fast-growing poultry wherein the growth plate of the proximal femur separates from its articular cartilage. At its early phase, FHS may remain asymptomatic but lead to epiphyseal breakage, infection, and femoral head necrosis (FHN). Healthy femoral head is viewed as a positive trait for genetic selection. However, the etiology of FHS is poorly understood for use in noninvasive diagnosis and genetic selection. Focal cell death and atrophic changes are likely associated with separation of tissues and necrotic changes. Fibrotic thickening of the articular surface can also impair free movement of the proximal epiphysis in the acetabulum, leading to FHS, under strain. The major limitation to understanding the pathophysiology of FHN is the lack of suitable experimental models and biomarkers to diagnose the problem. In this review, we discuss the possible etiologic factors, anatomic features of the chicken femoral head, biomarkers, and molecular mechanisms relevant to FHN.
Collapse
|
17
|
Huff GR, Huff WE, Rath NC. Effect of dexamethasone on bacteriostatic activity of turkey monocytes and implications for food safety. Vet Immunol Immunopathol 2015; 166:151-8. [PMID: 26099808 DOI: 10.1016/j.vetimm.2015.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/06/2015] [Accepted: 05/26/2015] [Indexed: 10/23/2022]
Abstract
Stress has been shown to affect the immune system of turkeys making them more susceptible to bacterial infections. Five-week-old male and female turkeys were treated with 3 intra-muscular injections of dexamethasone (Dex) at 0, 0.5 and 2.0mg/kg body weight. Twenty-four hours after the third injection birds were bled and white blood cell (WBC) differentials and bacteriostatic activity of monocytes were measured. Dex at both 0.5 and 2.0mg/kg decreased phagocytic activity in females only. Bacteriostatic activity was decreased at both concentrations of Dex at 8 and 16 h post-infection in both sexes and was lower in males as compared to females. Total WBC counts were increased in females at both concentrations of Dex whereas male total WBC counts were unaffected. Both males and females had an increase in the heterophil to lymphocyte ratio. Within the same study, replicate pens of turkeys were challenged with intra-air sac inoculation of 100 cfu of Escherichia coli. Isolation of E. coli was significantly increased by both Dex and E. coli challenge, but there were no differences between sexes. These results suggest that stress can compromise the bacteriostatic activity of turkey monocytes and increase bacterial colonization of blood and tissues, potentially affecting food safety.
Collapse
Affiliation(s)
- G R Huff
- USDA, Agricultural Research Service, Poultry Production and Product Safety Research, Poultry Science Center, University of Arkansas, Fayetteville, AR 72701, United States.
| | - W E Huff
- USDA, Agricultural Research Service, Poultry Production and Product Safety Research, Poultry Science Center, University of Arkansas, Fayetteville, AR 72701, United States
| | - N C Rath
- USDA, Agricultural Research Service, Poultry Production and Product Safety Research, Poultry Science Center, University of Arkansas, Fayetteville, AR 72701, United States
| |
Collapse
|
18
|
Wideman RF, Blankenship J, Pevzner IY, Turner BJ. Efficacy of 25-OH Vitamin D3 prophylactic administration for reducing lameness in broilers grown on wire flooring. Poult Sci 2015; 94:1821-7. [PMID: 26112039 DOI: 10.3382/ps/pev160] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/24/2015] [Indexed: 12/17/2022] Open
Abstract
Bacterial chondronecrosis with osteomyelitis (BCO) is the most common cause of lameness in commercial broilers. Growing broilers on wire flooring provides an excellent experimental model for reproducibly triggering significant levels of lameness attributable to BCO. In the present study we evaluated the efficacy of adding HyD (25-OH vitamin D3) to the drinking water as a preventative/prophylactic treatment for lameness. Broiler chicks were reared on 5 x 10 ft flat wire floor panels within 6 environmental chambers. Three chambers were supplied with tap water (Control group) and the remaining chambers were supplied with HyD (HyD group: 0.06 mL HyD solution/L water; dosing based on the HyD Solution label to provide 33.9 μg 25-OHD3/L) from d 1 through 56. Feed was provided ad libitum and was formulated to meet or exceed minimum standards for all ingredients, including 5,500 IU vitamin D3/kg. Lameness initially was detected on d 28, and the cumulative incidence of lameness on d 56 was higher in the Control group than in the HyD group (34.7 vs. 22.7%, respectively; P = 0.03; Z-test of proportions; chambers pooled). The most prevalent diagnoses for lame birds were osteochondrosis and osteomyelitis (BCO) of the proximal femora (52%) and tibiae (79%), accompanied by minor incidences of tibial dyschondroplasia (0.33%), spondylolisthesis, or kinky back (0.67%), and twisted legs (1%). Broilers that survived to d 56 without developing lameness did not differ in BW when compared by group within a gender. The wire flooring model imposes a rigorous, sustained challenge that undoubtedly is much more severe than typically would be experienced by broilers under normal commercial conditions. Therefore the encouraging response to HyD supplementation in the present study supports the potential for 25-OH vitamin D3 to attenuate outbreaks of lameness caused by BCO in commercial broiler flocks.
Collapse
Affiliation(s)
- R F Wideman
- University of Arkansas, Division of Agriculture, Fayetteville, AR 72701
| | - J Blankenship
- University of Arkansas, Division of Agriculture, Fayetteville, AR 72701
| | - I Y Pevzner
- Cobb-Vantress Inc., Siloam Springs, AR 72761
| | - B J Turner
- DSM Nutritional Products LLC, Parsippany, NJ 07054
| |
Collapse
|
19
|
Huff GR, Huff WE, Rath NC. Effects of Vitamin D and Yeast Extract Supplementation on Turkey Mortality and Clostridial Dermatitis Incidence in a Dexamethasone Immunosuppression Model. Avian Dis 2014; 58:572-8. [DOI: 10.1637/10865-051614-reg.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
20
|
Virulence profiles, phylogenetic background, and antibiotic resistance of Escherichia coli isolated from turkeys with airsacculitis. ScientificWorldJournal 2014; 2014:289024. [PMID: 25105155 PMCID: PMC4101927 DOI: 10.1155/2014/289024] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 05/23/2014] [Accepted: 05/30/2014] [Indexed: 11/23/2022] Open
Abstract
Avian Pathogenic Escherichia coli (APEC) has been studied for decades because of its economic impact on the poultry industry. Recently, the zoonotic potential of APEC and multidrug-resistant strains have emerged. The aim of this study was to characterize 225 APEC isolated from turkeys presenting airsacculitis. The results showed that 92% of strains presented a multidrug-resistance (MDR), and the highest levels of resistance were to sulfamethazine (94%) and tetracycline (83%). Half of these strains were classified in phylogenetic group B2, followed by B1 (28.6%), A (17.1%), and D (4.8%). The prevalence of virulence genes was as follows: salmochelin (iroN, 95%), increased serum survival (iss, 93%), colicin V (cvi/cva, 67%), aerobactin (iucD, 67%), temperature-sensitive haemagglutinin (tsh, 56%), iron-repressible protein (irp2, 51%), invasion brain endothelium (ibeA, 31%), vacuolating autotransporter toxin (vat, 24%), K1 antigen (neuS, 19%), enteroaggregative heat-stable cytotoxin (astA, 17%), and pilus associated with pyelonephritis (papC, 15%). These results demonstrate that the majority of the investigated strains belonged to group B2 and were MDR. These data suggest that turkeys may serve as a reservoir of pathogenic and multidrug-resistance strains, reinforcing the idea that poultry plays a role in the epidemiological chain of ExPEC.
Collapse
|
21
|
Huff GR, Huff WE, Rath NC. Dexamethasone immunosuppression resulting in turkey clostridial dermatitis: a retrospective analysis of seven studies, 1998-2009. Avian Dis 2014; 57:730-6. [PMID: 24597114 DOI: 10.1637/10522-030113-reg.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We have studied the etiology of turkey osteomyelitis complex (TOC) for the past 20 yr and have determined that this syndrome is caused by the inability of some fast-growing male turkeys to cope with production stressors. Although immunosuppressive viruses have often been associated with susceptibility to gangrenous dermatitis (cellulitis), we hypothesize that production stressors alone can also undermine resistance to opportunistic pathogens by both increasing bacterial translocation from the intestine and disrupting the skin's antimicrobial barrier, resulting in subcutaneous lesions referred to as cellulitis and recently named turkey clostridial dermatitis (CD). Some common characteristics between TOC and CD are that they are both caused by opportunistic bacterial species that are prevalent in the environment and are both most common in adolescent male birds. In both diseases the affected birds are often large, healthy, and from the best-performing flocks. Our TOC studies using dexamethasone immunosuppression result in a high incidence of cellulitis lesions in dead turkeys that were given either Escherichia coli or Staphylococcus aureus respiratory challenges. The natural presence of Clostridium spp. in the poultry intestine and environment suggests that they may also have been concomitant pathogens. We suggest that a useful and repeatable model for CD can be developed by focusing on the ability of stress to increase diuresis and wet litter conditions and undermine both intestinal and cutaneous bacterial resistance in fast-growing male turkeys.
Collapse
Affiliation(s)
- G R Huff
- United States Department of Agriculture, Agricultural Research Service, Poultry Production and Product Safety Research, Poultry Science Center, University of Arkansas, Fayetteville, AR 72701, USA.
| | - W E Huff
- United States Department of Agriculture, Agricultural Research Service, Poultry Production and Product Safety Research, Poultry Science Center, University of Arkansas, Fayetteville, AR 72701, USA
| | - N C Rath
- United States Department of Agriculture, Agricultural Research Service, Poultry Production and Product Safety Research, Poultry Science Center, University of Arkansas, Fayetteville, AR 72701, USA
| |
Collapse
|
22
|
Wideman R, Al-Rubaye A, Gilley A, Reynolds D, Lester H, Yoho D, Hughes J, Pevzner I. Susceptibility of 4 commercial broiler crosses to lameness attributable to bacterial chondronecrosis with osteomyelitis. Poult Sci 2013; 92:2311-25. [DOI: 10.3382/ps.2013-03150] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
23
|
Wideman RF, Pevzner I. Dexamethasone triggers lameness associated with necrosis of the proximal tibial head and proximal femoral head in broilers. Poult Sci 2012; 91:2464-74. [PMID: 22991529 DOI: 10.3382/ps.2012-02386] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Bacterial chondronecrosis with osteomyelitis (BCO) and turkey osteomyelitis complex (TOC) are characterized by bacterial infection and necrotic degeneration within the tibiae and femora. Stress and immunosuppression have been implicated in the pathogenesis of BCO and TOC. Immunosuppressive doses of dexamethasone (DEX) trigger high incidences of TOC in turkey poults. The present study was conducted to determine if DEX injections or heat stress can trigger BCO and lameness in broilers. In 3 independent experiments, broilers were weighed and either remained uninjected or received repeated injections of 0.9% saline or DEX dissolved in saline (0.45 to 1.5 mg of DEX/kg of BW). Across all 3 experiments, the incidences of lameness were 0% for uninjected controls, 0 to 8% in saline-injected groups, and 24 to 68% in groups injected with 0.9 to 1.5 mg of DEX/kg of BW. Growth was inhibited by DEX injections regardless of whether the birds became lame or survived. When compared with saline-injected groups, DEX injections consistently increased the incidence of severe proximal tibial head necrosis in lame birds as well as in survivors. The DEX injections also triggered a subset of lesions that are not considered pathognomonic for BCO (for example, avascular femoral head necrosis and fatty necrosis of the tibiae). In a fourth experiment, repeated episodes of heat stress did not trigger lameness, although the subclinical incidence of tibial head necrosis was substantially higher at 28 and 35 d of age in heat-stressed broilers when compared with broilers reared under thermoneutral conditions. Accordingly, stress and immunosuppression must be considered contributing factors in the pathogenesis of tibial and femoral lesions associated with lameness in broilers. A subset of the lesions triggered by repeated DEX injections did not precisely mimic the pathogenesis of BCO in broilers, and DEX consistently inhibited growth whereas BCO is associated with rapid growth. These caveats must be acknowledged when DEX is used to trigger lameness in broilers.
Collapse
Affiliation(s)
- R F Wideman
- University of Arkansas, Division of Agriculture, Fayetteville, AR, USA.
| | | |
Collapse
|
24
|
Wideman RF, Hamal KR, Stark JM, Blankenship J, Lester H, Mitchell KN, Lorenzoni G, Pevzner I. A wire-flooring model for inducing lameness in broilers: evaluation of probiotics as a prophylactic treatment. Poult Sci 2012; 91:870-83. [PMID: 22399726 DOI: 10.3382/ps.2011-01907] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacterial chondronecrosis with osteomyelitis (BCO) is the most common cause of lameness in commercial broilers. Bacteria entering the blood via translocation from the respiratory system or gastrointestinal tract spread hematogenously to the proximal epiphyseal-physeal cartilage of rapidly growing femora and tibiae, causing BCO. We tested the hypothesis that rearing broilers on wire flooring should increase the incidence of BCO by persistently imposing additional torque and shear stress on susceptible leg joints. We also tested the hypothesis that probiotics might attenuate bacterial translocation and thereby reduce the incidence of BCO. In 5 independent experiments using 4 commercial lines, broilers grown on wire flooring developed lameness attributable predominately to BCO. The fastest-growing birds were not necessarily the most susceptible to lameness on wire flooring, nor did the genders differ in susceptibility in the 2 experiments that included both male and female broilers. The pathogenesis of BCO is not instantaneous, and accordingly, many broilers that did not exhibit lameness, nevertheless, did possess early pathognomonic lesions. These subclinical lesions were equally likely to develop in the right or left leg. The lesion status of the proximal femoral head did not determine the lesion status of the ipsilateral or contralateral proximal tibial head and vice versa. Broilers reared on wire flooring consistently had higher incidences of lameness than hatch-mates reared on wood-shavings litter. Adding probiotics to the diet beginning at 1 d of age consistently reduced the incidence of lameness for broilers reared on wire flooring. These experiments indicate that probiotics administered prophylactically may constitute an alternative to antibiotics for reducing lameness attributable to BCO. Rearing broilers on wire flooring provides an important new research model for investigating the etiology, pathogenesis, and treatment strategies for BCO.
Collapse
Affiliation(s)
- R F Wideman
- University of Arkansas, Division of Agriculture, Fayetteville, AR 72701, USA.
| | | | | | | | | | | | | | | |
Collapse
|
25
|
Landman WJM, Feberwee A. Longitudinal field study on the occurrence ofMycoplasma synoviaein Dutch turkey flocks with lameness and experimental induction of the condition. Avian Pathol 2012; 41:141-9. [DOI: 10.1080/03079457.2011.652595] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
26
|
Huff GR, Dutta V, Huff WE, Rath NC. Effects of dietary yeast extract on turkey stress response and heterophil oxidative burst activity. Br Poult Sci 2012; 52:446-55. [PMID: 21919572 DOI: 10.1080/00071668.2011.600753] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
1. Effective nutritional approaches to counteract the negative effects of stress may provide food animal producers with useful alternatives to antibiotics. In this study, turkeys were fed on a standard diet, or the same diet supplemented with yeast extract (YE), to determine if YE would improve disease resistance in a stress model. 2. At 16 weeks of age, half of the birds were exposed to a bacterial challenge using a coarse spray of the pen environment. A subset of control and challenged birds was also treated with dexamethasone (Dex) prior to challenge (Dex/challenge). At 18 weeks, another subset was subjected to a 12?h transport stress protocol (Challenge/transport). All birds were bled and necropsied the morning after transport. The numbers and proportions of blood cells and the heterophil oxidative burst activity (OBA) were determined. Serum corticosterone (Cort) levels of male birds were measured using a commercial ELISA kit. Body weight and gain were increased by YE during week 1. 3. YE decreased mortality and bacterial isolation following Dex/challenge only in females. Cort levels in male turkeys were decreased by YE and Dex treatment. OBA was higher in males and in birds given YE and was reduced by challenge and transport. 4. These results suggest there may be gender differences in the turkey stress response and that dietary YE has potential for modulating the impact of stress on innate immunity of turkeys.
Collapse
Affiliation(s)
- G R Huff
- USDA Agricultural Research Service, University of Arkansas, Poultry Science Center, Fayetteville AR 72701, USA.
| | | | | | | |
Collapse
|
27
|
Wideman RF, Prisby RD. Bone circulatory disturbances in the development of spontaneous bacterial chondronecrosis with osteomyelitis: a translational model for the pathogenesis of femoral head necrosis. Front Endocrinol (Lausanne) 2012; 3:183. [PMID: 23346077 PMCID: PMC3550519 DOI: 10.3389/fendo.2012.00183] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 12/23/2012] [Indexed: 11/23/2022] Open
Abstract
This review provides a comprehensive overview of the vascularization of the avian growth plate and its subsequent role in the pathogenesis of bacterial chondronecrosis with osteomyelitis (BCO, femoral head necrosis). BCO sporadically causes high incidences of lameness in rapidly growing broiler (meat-type) chickens. BCO is believed to be initiated by micro-trauma to poorly mineralized columns of cartilage cells in the proximal growth plates of the leg bones, followed by colonization by hematogenously distributed opportunistic bacteria. Inadequate blood flow to the growth plate, vascular occlusion, and structural limitations of the microvasculature all have been implicated in the pathogenesis of BCO. Treatment strategies have been difficult to investigate because under normal conditions the incidence of BCO typically is low and sporadic. Rearing broilers on wire flooring triggers the spontaneous development of high incidences of lameness attributable to pathognomonic BCO lesions. Wire flooring imposes persistent footing instability and is thought to accelerate the development of BCO by amplifying the torque and shear stress imposed on susceptible leg joints. Wire flooring per se also constitutes a significant chronic stressor that promotes bacterial proliferation attributed to stress-mediated immunosuppression. Indeed, dexamethasone-mediated immunosuppression causes broilers to develop lameness primarily associated with avascular necrosis and BCO. Prophylactic probiotic administration consistently reduces the incidence of lameness in broilers reared on wire flooring, presumably by reducing bacterial translocation from the gastrointestinal tract that likely contributes to hematogenous infection of the leg bones. The pathogenesis of BCO in broilers is directly relevant to osteomyelitis in growing children, as well as to avascular femoral head necrosis in adults. Our new model for reliably triggering spontaneous osteomyelitis in large numbers of animals represents an important opportunity to conduct translational research focused on developing effective prophylactic and therapeutic treatments.
Collapse
Affiliation(s)
- Robert F. Wideman
- Center of Excellence for Poultry Science, University of ArkansasFayetteville, AR, USA
- *Correspondence: Robert F. Wideman, Center of Excellence for Poultry Science, University of Arkansas, O-402 Poultry Science Center, Fayetteville, AR 72701, USA. e-mail:
| | - Rhonda D. Prisby
- Department of Kinesiology and Applied Physiology, University of DelawareNewark, DE, USA
| |
Collapse
|
28
|
Olias P, Hauck R, Windhaus H, van der Grinten E, Gruber AD, Hafez HM. Articular aspergillosis of hip joints in turkeys. Avian Dis 2010; 54:1098-101. [PMID: 20945796 DOI: 10.1637/9232-011110-case.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Aspergillosis is an important cause of morbidity and mortality in birds. Turkey poults are known to be particularly susceptible to fungal infection. Although the respiratory tract is the most commonly affected, dissemination can occur into virtually any organ. Here, we report an unusual outbreak of articular aspergillosis in a flock of meat turkeys with clinical signs of lameness. Between 7 and 11 weeks of age, turkeys had severe granulomatous osteoarthritis of the hip joints with necrosis of the femur head. Fungal morphology and PCR amplification and sequencing of the first ITS1-5.8S-ITS2 rDNA region identified Aspergillus fumigatus as the infectious agent. Concurrently, Staphylococcus spp. was isolated from the hip joints, which may have promoted the tropism of the fungus. Mild respiratory tract aspergillosis was observed in only one case. The findings suggest that fungal arthritis may present a specific disease entity in turkeys and should be considered as further cause of lameness in turkeys.
Collapse
Affiliation(s)
- Philipp Olias
- Department of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertag-Strasse 15, 14163 Berlin, Germany
| | | | | | | | | | | |
Collapse
|
29
|
Ferreira A, Astolfi Ferreira C, Chacón J, Revolledo L, Gross R, Cotrim E. In vitro virucidal and bactericidal activities of Aviclor (a formulation of sodium dichloroisocyanurate) against pathogens of poultry origin. J APPL POULTRY RES 2010. [DOI: 10.3382/japr.2009-00030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
30
|
Time series evaluation of traumatic lesions and airsacculitis at one poultry abattoir in the state of São Paulo, Brazil (1996–2005). Prev Vet Med 2010; 94:231-9. [DOI: 10.1016/j.prevetmed.2010.02.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 01/10/2010] [Accepted: 02/22/2010] [Indexed: 12/26/2022]
|
31
|
Dutta V, Huff GR, Huff WE, Johnson MG, Nannapaneni R, Sayler RJ. The Effects of Stress on Respiratory Disease and Transient Colonization of Turkeys with Listeria monocytogenes Scott A. Avian Dis 2008; 52:581-9. [DOI: 10.1637/8299-032808-reg.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
32
|
Huff GR, Huff WE, Dutta V, Johnson MG, Nannapaneni R. Pathogenicity of Listeria monocytogenes Scott A After Oral and Oculonasal Challenges of Day-Old Turkey Poults. Avian Dis 2008; 52:444-50. [DOI: 10.1637/8244-013008-reg.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
33
|
Dziva F, Stevens MP. Colibacillosis in poultry: unravelling the molecular basis of virulence of avian pathogenicEscherichia coliin their natural hosts. Avian Pathol 2008; 37:355-66. [DOI: 10.1080/03079450802216652] [Citation(s) in RCA: 168] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
34
|
Peebles ED, Branton SL, Burnham MR, Whitmarsh SK, Gerard PD. Effects of supplemental dietary phytase and 25-hydroxycholecalciferol on the blood characteristics of commercial layers inoculated before or at the onset of lay with the F-strain of Mycoplasma gallisepticum. Poult Sci 2007; 86:768-74. [PMID: 17369552 DOI: 10.1093/ps/86.4.768] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In 3 trials, the effects of dietary supplementation with phytase (PHY) and 25-hydroxycholecalciferol on BW and the blood characteristics of commercial layers that were inoculated prelay (12 wk of age) or at the onset of lay (22 wk of age) with F-strain Mycoplasma gallisepticum were assessed at 34, 50, and 58 wk of age. Experimental layer diets, which included either a basal control diet or the same diet supplemented with 0.025% PHY and 25-hydroxycholecalciferol, were fed from 20 through 58 wk of age. The supplemented diet decreased blood hematocrit values across bird age, inoculation type (sham vs. F-strain M. gallisepticum), and age of inoculation (prelay vs. onset of lay). Phytase- and 25-hydroxycholecalciferol-supplemented diets reduced bird BW in sham-inoculated control birds across bird age and age of inoculation. This effect was not observed in F-strain M. gallisepticum-inoculated birds. Furthermore, across diet (control vs. supplemented) and inoculation type, total plasma protein concentration at 34 wk of age was higher in birds that were inoculated at the onset of lay compared with those inoculated prelay. Diet, inoculation type, and inoculation age had no effect on mortality, reproductive organ histopathological lesion scores, or serum cholesterol and Ca concentrations. In conclusion, throughout lay, the supplementation of commercial layer diets with PHY may lower hematocrit, and inoculation with F-strain M. gallisepticum prelay or at the onset of lay may ameliorate the depressing effects of dietary PHY and 25-hydroxycholecalciferol supplementation on hen BW.
Collapse
Affiliation(s)
- E D Peebles
- Department of Poultry Science, and Experimental Statistics Unit, Mississippi State University, Mississippi State MS 39762, USA.
| | | | | | | | | |
Collapse
|
35
|
Huff G, Huff W, Rath N, Donoghue A, Anthony N, Nestor K. Differential Effects of Sex and Genetics on Behavior and Stress Response of Turkeys. Poult Sci 2007; 86:1294-303. [PMID: 17575174 DOI: 10.1093/ps/86.7.1294] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Three lines of turkeys were tested for response in T-maze and open-field tests during the first 8 d after hatch, and behavior was observed after catching, moving, and transport. They were also compared for corticosterone (CORT) levels and heterophil:lymphocyte ratios (H:L) at 15 wk of age in response to an Escherichia coli challenge followed by transport stress. Large commercial-(COMM) line birds were faster and more active in the T-maze at d 2 than egg-line birds. Male COMM-line birds were faster than male egg-line birds when tested in an open field at d 8. Egg-line birds had more sleeping behavior after moving to a new floor pen as compared with both an intermediate-sized line (F line) and the COMM line. Transport stress increased CORT levels in all 3 lines, and the increase was greater in males compared with females. The egg line had higher basal CORT levels (P = 0.03) and higher levels after transport (P < 0.0001). The H:L ratios were affected by both transport stress and line but not by sex. The H:L ratio was lower in the egg line as compared with both the F line and the COMM line (P < 0.0001), with the COMM line having the greatest increase in response to transport. These data, combined with those from previous studies of these lines, suggest that differences in activity of fast-growing turkeys may be used to select birds that are less susceptible to inflammatory bacterial disease and that the H:L ratio may be more useful than serum CORT in evaluating the deleterious effects of stress.
Collapse
Affiliation(s)
- G Huff
- Poultry Production and Product Safety Research Unit, Agricultural Research Service, USDA, Fayetteville, AR 72701, USA.
| | | | | | | | | | | |
Collapse
|
36
|
Huff GR, Huff WE, Rath NC, Solis de Los Santos F, Farnell MB, Donoghue AM. Influence of Hen Age on the Response of Turkey Poults to Cold Stress, Escherichia coli Challenge, and Treatment with a Yeast Extract Antibiotic Alternative. Poult Sci 2007; 86:636-42. [PMID: 17369533 DOI: 10.1093/ps/86.4.636] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Two battery experiments were conducted to evaluate a commercial yeast extract feed supplement, Alphamune, in a cold stress-Escherichia coli challenge of 1-wk-old turkeys. Experiment 1 used 1-d-old male poults that were the progeny of 33-wk-old hens in their second week of lay. Experiment 2 used male poults of the same genetic line from 40-wk-old hens in their eighth week of lay. Poults were fed a standard unmedicated turkey starter diet or the same diet with either a low level (504 g/t) or a high level (1,008 g/t) of yeast extract. Challenged birds were exposed to intermittent cold stress during wk 1 to 3 and to a respiratory E. coli challenge at 1 wk of age. In both experiments, BW at wk 1 was increased by feeding yeast extract. In experiment 1, challenged, control-fed birds had decreased BW at wk 3 and feed conversion was protected by both levels of yeast extract supplementation. In experiment 2, challenge had no effect on control-fed birds; however, yeast extract decreased the BW of challenged birds. In experiment 1, total leukocyte numbers were decreased by challenge of control-fed birds only, and there was no effect of challenge on the heterophil/lymphocyte ratio. In experiment 2, total leukocyte numbers were decreased and the heterophil/lymphocyte ratio was increased in challenged, control-fed birds. Percentage mortality was not affected by challenge in experiment 1; however, in experiment 2, mortality was increased by challenge of control-fed birds and those fed the lower level of yeast extract. These results suggest that hen age should be considered when designing studies to evaluate antibiotic alternatives and in making decisions for incorporating such alternatives into production.
Collapse
Affiliation(s)
- G R Huff
- USDA, Agricultural Research Service Poultry Production and Product Safety Research, Fayetteville, AR 72701, USA.
| | | | | | | | | | | |
Collapse
|
37
|
Huff G, Huff W, Rath N, Balog J, Anthony NB, Nestor K. Stress-induced colibacillosis and turkey osteomyelitis complex in turkeys selected for increased body weight. Poult Sci 2006; 85:266-72. [PMID: 16523626 DOI: 10.1093/ps/85.2.266] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Two stress models were used to induce colibacillosis and turkey osteomyelitis complex (TOC): Escherichia coli challenge following dexamethasone injection (Dex) and E. coli challenge preceding transport stress (Transport). A total of 160 birds from 3 lines of turkeys: a slow-growing line selected for egg production (Egg), a line selected for 16-wk BW (F line), and a Commercial line (Comm), were studied in a 3 x 3 x 2 (line x treatment x sex) factorial design. At 14 wk, the Dex group was treated with 3 injections of 2 mg of Dex/kg of BW followed by airsac challenge with 100 cfu of E. coli. The Transport group was given 5,000 cfu of the same E. coli and 8 d later was transported for 3 h and held for an additional 9 h in the transport vehicle. Controls of each line were neither stressed nor challenged with E. coli. Birds were necropsied 2 wk postchallenge. All birds were sexed, scored for airsacculitis (AS) and TOC, and knee synovia were cultured for E. coli. Percent mortality was unaffected by sex, was increased by the Dex treatment, and was higher in Dex-treated male Comm-line birds and Dex-treated female F-line birds compared with their respective nonchallenged controls. Both treatments increased AS scores, and scores of Dex-treated male Comm-line birds and female F-line birds were also higher compared with their respective controls. Male Comm birds under Transport had higher AS scores as compared with nonchallenged males and challenged females. The TOC incidence was increased by Dex only. There was no TOC in Egg-line birds, whereas TOC incidence approached significance in both Comm and F lines compared with the Egg line (P = 0.06). Males had twice as much TOC as females, and this approached significance in the F line (P = 0.06). There was a low level of TOC in male Transport birds of both large-bodied lines, whereas no female Transport birds had TOC lesions. Dex-treated male birds of both the F line and Comm line had significantly higher incidence of TOC compared with their respective nonchallenged controls. The challenge strain of E. coli was isolated from more knee cultures of both large lines compared with the Egg line. Isolation was increased by Dex and was higher in male Comm-line birds and both male and female F-line birds relative to their controls. The difference in disease resistance between these lines suggests that selection for fast growth of turkeys may affect the stress response, resulting in increased chronic bacterial disease such as TOC.
Collapse
Affiliation(s)
- G Huff
- USDA, Agricultural Research Service, Poultry Production and Product Safety Research Unit, Poultry Science Center, University of Arkansas, Fayetteville 72701, USA.
| | | | | | | | | | | |
Collapse
|
38
|
Huff GR, Huff WE, Beasley JN, Rath NC, Johnson MG, Nannapaneni R. Respiratory infection of turkeys with Listeria monocytogenes Scott A. Avian Dis 2006; 49:551-7. [PMID: 16404998 DOI: 10.1637/7375-05040r.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The pathogenesis of L. monocytogenes strain Scott A was studied by challenging day-old male turkey poults by air sac inoculation with tryptose phosphate broth containing 10(0) cfu (control), 10(4), 10(5), and 10(6) cfu (low challenge), or 10(7) and 10(8) cfu (high challenge) of the Scott A (serotype 4b) strain of L. monocytogenes. Mortality at 2 wk postinfection (PI) ranged from 25% for low challenge to 100% for high challenge (P= 0.0001). Gross and histopathological lesions were observed in heart, liver, spleen, lung, and bursa of Fabricius of mortalities at 4 days PI. Listeria monocytogenes challenge resulted in significantly decreased relative weight of the bursa of Fabricius and increased relative weight of the spleen, and L. monocytogenes was isolated by direct plating of liver, pericardium, brain, and both left and right stifle joint synovium (knee) cultures, as well as gall bladder, yolk sac, and cecal tonsil from transfer swabs onto Listeria-selective agar. Isolates were confirmed as positive using Gram stain, biochemical tests, and the Biolog system. High challenge resulted in confirmed L. monocytogenes isolation from 48% of left knee and 59% of right knee cultures. Low challenge resulted in isolation of L. monocytogenes from 11% of both left and right knee cultures. These results suggest that L. monocytogenes Scott A colonization of turkey knee synovial tissue can initiate in day-of-age poults and that L. monocytogenes Scott A can be invasive through air sac infection.
Collapse
Affiliation(s)
- G R Huff
- USDA, Agricultural Research Service, Poultry Production and Product Safety Research, Fayetteville, Arkansas 72701, USA
| | | | | | | | | | | |
Collapse
|
39
|
Smyth DS, Hartigan PJ, Meaney WJ, Fitzgerald JR, Deobald CF, Bohach GA, Smyth CJ. Superantigen genes encoded by the egc cluster and SaPIbov are predominant among Staphylococcus aureus isolates from cows, goats, sheep, rabbits and poultry. J Med Microbiol 2005; 54:401-411. [PMID: 15770028 DOI: 10.1099/jmm.0.45863-0] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In recent years several new staphylococcal enterotoxins (SEs) have been described, which currently have largely unknown frequencies of occurrence and roles in human or animal disease. One hundred and ninety-one Staphylococcus aureus isolates from cows (99), goats (39), sheep (23), rabbits (15), chickens (15) and a cat (1) were screened for SE genes sea-see, seg-seo and seq and for the tst gene encoding staphylococcal toxic shock syndrome toxin-1 using multiplex PCRs and individual PCRs for the seb and sek genes. One hundred and ten isolates tested positive for at least one of these 16 superantigen (SAg)-encoding genes. There were statistically significant differences in the frequencies of some of these SAg genes between isolates from different animals. No strain possessed either the sea or see gene. The sec gene was present in 51 isolates, the sed gene in eight and the seb gene in one. The seh gene was found in four strains and the sek and seq genes together in one isolate. The most common combinations of genes were the egc cluster, bearing the seg, sei, sem, sen and seo genes, in 47 isolates, the sec, sel and tst gene combination typical of the SaPIbov pathogenicity island in 44 isolates, the egc cluster lacking the seg gene in 11 isolates, the sed and sej genes in nine isolates, and the sec and tst genes without the sel gene in seven isolates. The higher frequencies of the sec and tst genes together and the lower frequencies of the egc gene cluster among the SAg gene-positive sheep or goat isolates compared to bovine isolates were statistically significant. Of 36 bovine isolates that were mitogenic for human T lymphocytes, four were negative for the 16 SAg genes tested for, while a further 14 gave borderline results in the mitogenicity assay, 12 of which were SAg gene-negative. Twenty-nine strains lacking all the SAg genes did not induce T-cell proliferation. This survey indicates that novel SE genes seg, sei, sel, sem, sen and seo along with the sec and tst genes predominate in S. aureus from animal hosts. The mitogenicity assays indicate that further uncharacterized SAgs may be present in bovine isolates.
Collapse
Affiliation(s)
- Davida S Smyth
- Department of Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, University of Dublin, Dublin 2, Ireland 2Department of Physiology, Trinity College, University of Dublin, Dublin 2, Ireland 3Teagasc, Dairy Production Research Centre, Moorepark, Fermoy, County Cork, Ireland 4Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, ID 83844, USA
| | - Patrick J Hartigan
- Department of Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, University of Dublin, Dublin 2, Ireland 2Department of Physiology, Trinity College, University of Dublin, Dublin 2, Ireland 3Teagasc, Dairy Production Research Centre, Moorepark, Fermoy, County Cork, Ireland 4Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, ID 83844, USA
| | - William J Meaney
- Department of Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, University of Dublin, Dublin 2, Ireland 2Department of Physiology, Trinity College, University of Dublin, Dublin 2, Ireland 3Teagasc, Dairy Production Research Centre, Moorepark, Fermoy, County Cork, Ireland 4Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, ID 83844, USA
| | - J Ross Fitzgerald
- Department of Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, University of Dublin, Dublin 2, Ireland 2Department of Physiology, Trinity College, University of Dublin, Dublin 2, Ireland 3Teagasc, Dairy Production Research Centre, Moorepark, Fermoy, County Cork, Ireland 4Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, ID 83844, USA
| | - Claudia F Deobald
- Department of Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, University of Dublin, Dublin 2, Ireland 2Department of Physiology, Trinity College, University of Dublin, Dublin 2, Ireland 3Teagasc, Dairy Production Research Centre, Moorepark, Fermoy, County Cork, Ireland 4Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, ID 83844, USA
| | - Gregory A Bohach
- Department of Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, University of Dublin, Dublin 2, Ireland 2Department of Physiology, Trinity College, University of Dublin, Dublin 2, Ireland 3Teagasc, Dairy Production Research Centre, Moorepark, Fermoy, County Cork, Ireland 4Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, ID 83844, USA
| | - Cyril J Smyth
- Department of Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, University of Dublin, Dublin 2, Ireland 2Department of Physiology, Trinity College, University of Dublin, Dublin 2, Ireland 3Teagasc, Dairy Production Research Centre, Moorepark, Fermoy, County Cork, Ireland 4Department of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, ID 83844, USA
| |
Collapse
|
40
|
Huff GR, Huff WE, Balog JM, Rath NC, Anthony NB, Nestor KE. Stress response differences and disease susceptibility reflected by heterophil to lymphocyte ratio in turkeys selected for increased body weight. Poult Sci 2005; 84:709-17. [PMID: 15913182 DOI: 10.1093/ps/84.5.709] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Three genetic lines of turkeys were compared for their responses to Escherichia coli challenge following dexamethasone injection (Dex) or E. coli challenge preceding transport stress (TS). The turkey lines were a slow growing line selected for increased egg production (Egg line), a fast growing line selected for increased 16-wk BW (F line), and a commercial line (Comm line). At 14 wk of age, the Dex group was treated with 3 injections of 2 mg of Dex/kg of BW followed by airsac challenge with 100 cfu of E. coli. The TS group was given the same E. coli challenge at 1 x 10(4) cfu/bird without Dex treatment, and was subjected to transport stress, including 12 h of holding time in a transport vehicle, 8 d after the challenge. All treated birds and untreated control birds were bled at the same time, which was 1 d after transport and 9 d after challenge with E. coli. The main effect mean (MEM) total leukocyte counts (WBC) and the percentages of eosinophils (Eos) and basophils (Baso) were the same for all 3 lines; however, the MEM percentages of heterophils (Het) and monocytes (Mono) and the heterophil/lymphocyte ratio (H/L) were lower and the percentage of lymphocytes (Lym) was higher in the Egg line compared with the 2 fast-growing lines. Both stress treatments increased WBC, Het, and H/L and decreased Lym in all 3 lines; however, these effects were significantly greater in both fast growing lines compared with the Egg line. Sixteen-week BW was unaffected by either treatment in the Egg line and was decreased by both treatments in the Comm line and by the Dex treatment in the F line. Main effect mean airsacculitis score (AS) was not affected by line and was significantly increased by TS and Dex treatments. Neither treatment affected AS of the Egg line birds, whereas Dex treatment increased AS of the F line, and both Dex and TS increased AS of the Comm line. Mortality was significantly higher in the Comm line compared with the Egg line and was intermediate in the F line. The differences between these lines in their disease resistance and physiological response to stress in 2 stress models suggests that increasing selection for BW of turkeys is accompanied by changes in the stress response resulting in increased susceptibility to opportunistic bacterial infection.
Collapse
Affiliation(s)
- G R Huff
- USDA, Agricultural Research Service, Poultry Production and Product Safety Research, Fayetteville, Arkansas 72701, USA.
| | | | | | | | | | | |
Collapse
|
41
|
Huff GR, Huff WE, Balog JM, Rath NC. The effects of behavior and environmental enrichment on disease resistance of turkeys. Brain Behav Immun 2003; 17:339-49. [PMID: 12946656 DOI: 10.1016/s0889-1591(03)00035-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Turkey poults were provided with environmental enrichment for the first 14 days after hatch. At 2 days of age each bird was tested for the speed in which it would cross a T-maze. At 5 weeks of age birds were treated with dexamethasone and challenged with Escherichia coli. Enriched birds had higher body weights and incidence of disease and mortality and lower numbers of leukocytes when challenged. Challenged and enriched birds that tested FAST had higher mortality and air sacculitis scores and lower body weights than SLOW birds. Non-enriched, SLOW birds were the only ones to respond to challenge with increases in leukocyte counts and heterophil/lymphocyte ratios. These data suggest that environmental enrichment during the first 2 weeks after hatch may be detrimental to those birds with a FAST T-maze response, and that poults with a FAST response in the T-maze may be more susceptible to experimental bacterial infection.
Collapse
Affiliation(s)
- G R Huff
- USDA, Agricultural Research Service, Poultry Production and Product Safety Research, Poultry Science Center, University of Arkansas, Fayetteville, AR 72701, USA.
| | | | | | | |
Collapse
|