1
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Maboni G, Prakash N, Moreira MAS. Review of methods for detection and characterization of non-tuberculous mycobacteria in aquatic organisms. J Vet Diagn Invest 2024; 36:299-311. [PMID: 37606184 PMCID: PMC11110783 DOI: 10.1177/10406387231194619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023] Open
Abstract
Mycobacteriosis is an emerging and often lethal disease of aquatic organisms caused by several non-tuberculous mycobacteria (NTM) species. Early diagnosis of mycobacteriosis in aquaculture and aquatic settings is critical; however, clinical diagnoses and laboratory detection are challenging, and the available literature is scarce. In an attempt to fill the gap, here we review the most relevant approaches to detect and characterize mycobacteria in clinical specimens of aquatic organisms. Emphasis is given to recent advances in molecular methods used to differentiate NTM species spanning from targeted gene sequencing to next-generation sequencing. Further, given that there are major gaps in our understanding of the prevalence of the different NTM species, partially because of their distinct requirements for in vitro growth, we also reviewed the most relevant NTM species reported to cause disease in aquatic organisms and their specific in vitro growth conditions. We also highlight that traditional bacterial culture continues to be relevant for NTM identification, particularly in non-automated laboratories. However, for NTM species discrimination, a high level of accuracy can be achieved with MALDI-TOF MS and molecular approaches, especially targeted gene sequencing applied from clinical specimens or from pure NTM isolates.
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Affiliation(s)
- Grazieli Maboni
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Niharika Prakash
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Maria Aparecida S. Moreira
- Department of Veterinary, Bacterial Diseases Laboratory, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
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2
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Reed W, Østevik L, Lie KI, Wisløff H. Mycobacteriosis in Norwegian farmed Atlantic salmon (Salmo salar L.). JOURNAL OF FISH DISEASES 2023; 46:1151-1155. [PMID: 37340874 DOI: 10.1111/jfd.13826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/06/2023] [Accepted: 06/09/2023] [Indexed: 06/22/2023]
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3
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Sullivan MR, McGowen K, Liu Q, Akusobi C, Young DC, Mayfield JA, Raman S, Wolf ID, Moody DB, Aldrich CC, Muir A, Rubin EJ. Biotin-dependent cell envelope remodelling is required for Mycobacterium abscessus survival in lung infection. Nat Microbiol 2023; 8:481-497. [PMID: 36658396 PMCID: PMC9992005 DOI: 10.1038/s41564-022-01307-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 12/14/2022] [Indexed: 01/21/2023]
Abstract
Mycobacterium abscessus is an emerging pathogen causing lung infection predominantly in patients with underlying structural abnormalities or lung disease and is resistant to most frontline antibiotics. As the pathogenic mechanisms of M. abscessus in the context of the lung are not well-understood, we developed an infection model using air-liquid interface culture and performed a transposon mutagenesis and sequencing screen to identify genes differentially required for bacterial survival in the lung. Biotin cofactor synthesis was required for M. abscessus growth due to increased intracellular biotin demand, while pharmacological inhibition of biotin synthesis prevented bacterial proliferation. Biotin was required for fatty acid remodelling, which increased cell envelope fluidity and promoted M. abscessus survival in the alkaline lung environment. Together, these results indicate that biotin-dependent fatty acid remodelling plays a critical role in pathogenic adaptation to the lung niche, suggesting that biotin synthesis and fatty acid metabolism might provide therapeutic targets for treatment of M. abscessus infection.
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Affiliation(s)
- Mark R Sullivan
- Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Kerry McGowen
- Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Qiang Liu
- Department of Medicinal Chemistry, University of Minnesota College of Pharmacy, Minneapolis, MN, USA
| | - Chidiebere Akusobi
- Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - David C Young
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jacob A Mayfield
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Sahadevan Raman
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ian D Wolf
- Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - D Branch Moody
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Courtney C Aldrich
- Department of Medicinal Chemistry, University of Minnesota College of Pharmacy, Minneapolis, MN, USA
| | - Alexander Muir
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Eric J Rubin
- Department of Immunology and Infectious Disease, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
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4
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Inohana M, Komine T, Tanaka Y, Kurata O, Wada S. Genital mycobacteriosis caused by Mycobacterium marinum detected in two captive sharks by peptide nucleic acid-fluorescence in situ hybridization. JOURNAL OF FISH DISEASES 2023; 46:47-59. [PMID: 36130072 PMCID: PMC10087912 DOI: 10.1111/jfd.13716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/08/2022] [Accepted: 09/08/2022] [Indexed: 06/15/2023]
Abstract
Mycobacterium marinum is a prevalent nontuberculous mycobacterium (NTM)-infecting teleosts. Conversely, little is known about mycobacteriosis in elasmobranchs, and M. marinum infection has never been reported from the subclass. This study investigated the histopathological characteristics and localization of this mycobacterium through molecular analysis of two captive sharks, a scalloped hammerhead Sphyrna lewini and a Japanese bullhead shark Heterodontus japonicus, exhibited in the same aquarium tank. We detected genital mycobacteriosis caused by M. marinum infection using molecular analyses, including polymerase chain reaction (PCR) and DNA sequencing targeting the 60 kDa heat-shock protein gene (hsp65), and peptide nucleic acid-fluorescence in situ hybridization (PNA-FISH) targeting the 16S rRNA gene. Both sharks showed granulomas in connective tissues of the gonads without central necrosis or surrounding fibrous capsules, which is unlike the typical mycobacterial granulomas seen in teleosts. This study reveals that elasmobranchs can be aquatic hosts of M. marinum. Because M. marinum is a representative waterborne NTM and a potential zoonotic agent, cautious and intensive research is needed to overcome a lack of data on the relationship between NTM and the aquatic environment in association with this subclass of Chondrichthyes.
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Affiliation(s)
- Mari Inohana
- Laboratory of Aquatic Medicine, School of Veterinary Medicine, Faculty of Veterinary Medical ScienceNippon Veterinary and Life Science UniversityMusashinoJapan
| | - Takeshi Komine
- Laboratory of Aquatic Medicine, School of Veterinary Medicine, Faculty of Veterinary Medical ScienceNippon Veterinary and Life Science UniversityMusashinoJapan
| | | | - Osamu Kurata
- Laboratory of Aquatic Medicine, School of Veterinary Medicine, Faculty of Veterinary Medical ScienceNippon Veterinary and Life Science UniversityMusashinoJapan
| | - Shinpei Wada
- Laboratory of Aquatic Medicine, School of Veterinary Medicine, Faculty of Veterinary Medical ScienceNippon Veterinary and Life Science UniversityMusashinoJapan
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5
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Mocho JP, von Krogh K. A FELASA Working Group Survey on Fish Species Used for Research, Methods of Euthanasia, Health Monitoring, and Biosecurity in Europe, North America, and Oceania. BIOLOGY 2022; 11:biology11091259. [PMID: 36138738 PMCID: PMC9495953 DOI: 10.3390/biology11091259] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 11/20/2022]
Abstract
Simple Summary An international survey was conducted regarding species used for research, methods of euthanasia, health monitoring, and biosecurity in fish laboratories. A total of 145 facilities from 23 countries contributed. Over 80 different species were reported to be used for research, of which zebrafish (Danio rerio) was the most common by far. Anesthetic overdose was the preferred method for euthanasia for adults, fry, and larvae not capable of independent feeding. For all developmental stages, the most popular anesthetic compound was tricaine. Around half of the respondents did not perform a completion method to ensure death. One-quarter of the responding facilities did not have a health monitoring system in place. Only a small fraction reported quarantine routines to ensure reliable biological barriers. There was little consensus amongst facilities in how to perform biosecurity measures. Abstract An international survey was conducted regarding species used for research, methods of euthanasia, health monitoring, and biosecurity in fish laboratories. A total of 145 facilities from 23 countries contributed. Collectively, over 80 different species (or groups of species) were reported to be used for research, of which zebrafish (Danio rerio) was the most common by far. About half of the participating laboratories used multiple species. Anesthetic overdose was the preferred method for euthanasia for adult, fry (capable of independent feeding), and larval (not capable of independent feeding) fish. For all developmental stages, the most popular anesthetic compound was tricaine (MS-222), a substance associated with distress and aversion in several species. Moreover, around half of the respondents did not perform a completion method to ensure death. One-quarter of the responding facilities did not have a health monitoring system in place. While most respondents had some form of quarantine process for imported fish, only a small fraction reported quarantine routines that ensure reliable biological barriers. Furthermore, less than one in five screened fish for pathogens while in quarantine. In sum, there was little consensus amongst facilities in how to perform biosecurity measures. Regarding euthanasia, health monitoring, and biosecurity processes, there is a need for updated and universal guidelines and for many laboratories to adjust their practices.
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Leigh SC, Catabay C, German DP. Sustained changes in digestive physiology and microbiome across sequential generations of zebrafish fed different diets. Comp Biochem Physiol A Mol Integr Physiol 2022; 273:111285. [PMID: 35961610 DOI: 10.1016/j.cbpa.2022.111285] [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: 03/04/2022] [Revised: 07/30/2022] [Accepted: 07/31/2022] [Indexed: 11/29/2022]
Abstract
Alterations to ratios of protein and fiber in an organism's diet have been shown to structurally and functionally alter its individual digestive physiology. However, it is unclear how these dietary changes may affect phenotypic changes across generations. We utilized feeding trials, morphological analyses, enzyme activities, and 16S rRNA sequencing of the gut microbiome of zebrafish (Danio rerio) to determine how variations to fiber and protein concentrations, kept consistent across sequential generations, affect phenotypic changes. Our results show that Parental (P) and first generation (F1) fish did not differ from each other in terms of their intestine length, intestine mass, enzyme activity levels, and microbial community composition for any of the three experimental diets (high-protein/low-fiber, moderate-protein/fiber, and low-protein/high-fiber). However, each of the three experimental diets for the P and F1 fish, as well as the ancestral diet fish, did have distinct microbial community structure from one another. This indicates that there is a strong dietary effect on digestive physiology and gut microbial community and that these effects are consistent when the diet is kept homogenous across generations.
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Affiliation(s)
- Samantha C Leigh
- Department of Biology, California State University Dominguez Hills, Carson, CA 90747, USA.
| | - Caitlyn Catabay
- Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA
| | - Donovan P German
- Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA. https://twitter.com/dgermanuci
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7
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Mocho JP, Collymore C, Farmer SC, Leguay E, Murray KN, Pereira N. FELASA-AALAS Recommendations for Biosecurity in an Aquatic Facility, Including Prevention of Zoonosis, Introduction of New Fish Colonies, and Quarantine. Comp Med 2022; 72:149-168. [PMID: 35688609 PMCID: PMC9334003 DOI: 10.30802/aalas-cm-22-000042] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/02/2022] [Indexed: 12/12/2022]
Abstract
FELASA and AALAS established a joint working group to advise on good practices for the exchange of fish for research. In a first manuscript, the working group made recommendations for health monitoring and reporting of monitoring results. The focus of this second related manuscript is biosecurity in fish facilities. First, we define the risk of contamination of personnel by zoonotic pathogens from fish or from system water, including human mycobacteriosis. Preventive measures are recommended, such as wearing task-specific personal protective equipment. Then we discuss biosecurity, highlighting the establishment of biosecurity barriers to preserve the health status of a facility. A functional biosecurity program relies on integration of the entire animal facility organization, including the flow of staff and animals, water treatments, and equipment sanitation. Finally, we propose 4 steps for introducing new fish colonies: consideration of international trade and national restrictions; assessing risk according to fish source and developmental stage; establishing quarantine barriers; and the triage, screening, and treatment of newly imported fish. We then provide 3 realistic sample scenarios to illustrate practical biosecurity risk assessments and mitigation measures based on considerations of health status and quarantine conditions.
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Affiliation(s)
| | - Chereen Collymore
- Veterinary Care and Services, Charles River Laboratories, Senneville, Quebec, Canada
| | - Susan C Farmer
- Zebrafish Research Facility, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | | | - Katrina N Murray
- Zebrafish International Resource Center, University of Oregon, Eugene, Oregon, USA
| | - Nuno Pereira
- Chronic Diseases Research Center (CEDOC), Nova Medical School, Lisbon; Faculty of Veterinary Medicine, Lusophone University of Humanities and Technologies, Lisbon, Portugal; Gulbenkian Institute of Science, Oeiras, Portugal; ISPA - University Institute of Psychological, Social and Life Sciences, Lisbon, Portugal; Lisbon Oceanarium, Lisbon, Portugal
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8
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Mocho JP, Collymore C, Farmer SC, Leguay E, Murray KN, Pereira N. FELASA-AALAS Recommendations for Monitoring and Reporting of Laboratory Fish Diseases and Health Status, with an Emphasis on Zebrafish ( Danio Rerio). Comp Med 2022; 72:127-148. [PMID: 35513000 PMCID: PMC9334007 DOI: 10.30802/aalas-cm-22-000034] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/02/2022] [Indexed: 11/05/2022]
Abstract
The exchange of fish for research may expose an aquatic laboratory to pathogen contamination as incoming fish can introduce bacteria, fungi, parasites, and viruses capable of affecting both experimental results and fish and personnel health and welfare. To develop risk mitigation strategies, FELASA and AALAS established a joint working group to recommend good practices for health monitoring of laboratory fish. The recommendations address all fish species used for research, with a particular focus on zebrafish (Danio rerio). First, the background of the working group and key definitions are provided. Next, fish diseases of high impact are described. Third, recommendations are made for health monitoring of laboratory fishes. The recommendations emphasize the importance of daily observation of the fish and strategies to determine fish colony health status. Finally, report templates are proposed for historical screening data and aquatic facility description to facilitate biohazard risk assessment when exchanging fish.
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Affiliation(s)
| | - Chereen Collymore
- Veterinary Care and Services, Charles River Laboratories, Senneville, Quebec, Canada
| | - Susan C Farmer
- Zebrafish Research Facility, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | | | - Katrina N Murray
- Zebrafish International Resource Center, University of Oregon, Eugene, Oregon, USA
| | - Nuno Pereira
- Chronic Diseases Research Center (CEDOC), Nova Medical School, Lisbon; Faculty of Veterinary Medicine, Lusophone University of Humanities and Technologies, Lisbon, Portugal; Gulbenkian Institute of Science, Oeiras. Portugal; ISPA - University Institute of Psychological, Social and Life Sciences, Lisbon, Portugal; Lisbon Oceanarium, Lisbon, Portugal
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9
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Antibiotic susceptibility of mycobacteria isolated from ornamental fish. J Vet Res 2022; 66:69-76. [PMID: 35582485 PMCID: PMC8959692 DOI: 10.2478/jvetres-2022-0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 03/01/2022] [Indexed: 11/20/2022] Open
Abstract
Abstract
Introduction
Nontuberculous mycobacteria (NTM) are increasingly recognised as causative agents of opportunistic infections in humans for which effective treatment is challenging. There is very little information on the prevalence of NTM drug resistance in Poland. This study was aimed to evaluate the susceptibility to antibiotics of NTM, originally isolated from diseased ornamental fish.
Material and Methods
A total of 99 isolates were studied, 50 of them rapidly growing mycobacteria (RGM) (among which three-quarters were Mycobacterium chelonae, M. peregrinum, and M. fortuitum and the rest M. neoaurum, M. septicum, M. abscessus, M. mucogenicum, M. salmoniphilum, M saopaulense, and M. senegalense). The other 49 were slowly growing mycobacteria (SGM) isolates (among which only one was M. szulgai and the bulk M. marinum and M. gordonae). Minimum inhibitory concentrations for amikacin (AMK), kanamycin (KAN), tobramycin (TOB), doxycycline (DOX), ciprofloxacin (CIP), clarithromycin (CLR), sulfamethoxazole (SMX), isoniazid (INH) and rifampicin (RMP) were determined.
Results
The majority of the isolates were susceptible to KAN (95.95%: RGM 46.46% and SGM 49.49%), AMK (94.94%: RGM 45.45% and SGM 49.49%), CLR (83.83%: RGM 36.36% and SGM 47.47%), SMX (79.79%: RGM 30.30% and SMG 49.49%), CIP (65.65%: RGM 24.24% and SGM 41.41%), and DOX (55.55%: RGM 9.06% and SGM 46.46%). The majority were resistant to INH (98.98%: RGM 50.50% and SGM 48.48%) and RMP (96.96%: RGM 50.50% and SGM 46.46%).
Conclusion
The drug sensitivity of NTM varies from species to species. KAN, AMK, CLR and SMX were the most active against RGM isolates, and these same four plus DOX and CIP were the best drugs against SGM isolates.
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Janik AJ, Whipps CM. Differences in susceptibility to Mycobacterium chelonae in zebrafish (Danio rerio) lines commonly used in scientific research. JOURNAL OF FISH DISEASES 2022; 45:435-443. [PMID: 34905233 PMCID: PMC8828697 DOI: 10.1111/jfd.13572] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 10/13/2021] [Accepted: 10/17/2021] [Indexed: 06/14/2023]
Abstract
Mycobacteriosis is one of the most common diseases encountered in laboratory zebrafish. These infections can present a problem to researchers using zebrafish because they may introduce unknown experimental variables. Whilst differences in severity of infections between species of Mycobacterium infecting zebrafish have been well documented, little is known about differences in susceptibility between zebrafish lines. Previous surveys have found higher prevalence in the TU zebrafish line relative to other lines, suggesting that there may be underlying genetic differences in susceptibility. This study investigates Mycobacterium chelonae H1E2-GFP infections in four different zebrafish lines commonly used in research (AB, 5D, casper and TU). Fish were exposed to a labelled (green-fluorescent protein (GFP)) strain of M. chelonae by intraperitoneal injection, and infection status was evaluated after 10 weeks. Visualization of GFP in euthanized fish and histology were used as endpoints. In GFP images, severity was assessed by image analysis, and in histological sections, counts of granulomas containing acid-fast bacteria were used. Results indicated differences in severity of infections between lines, but no significant differences in prevalence.
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Affiliation(s)
- Andrew J Janik
- SUNY-ESF, State University of New York College of Environmental Science and Forestry, Environmental and Forest Biology, Syracuse, NY, USA
| | - Christopher M Whipps
- SUNY-ESF, State University of New York College of Environmental Science and Forestry, Environmental and Forest Biology, Syracuse, NY, USA
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11
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Murray KN, Clark TS, Kebus MJ, Kent ML. Specific Pathogen Free - A review of strategies in agriculture, aquaculture, and laboratory mammals and how they inform new recommendations for laboratory zebrafish. Res Vet Sci 2021; 142:78-93. [PMID: 34864461 PMCID: PMC9120263 DOI: 10.1016/j.rvsc.2021.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 11/04/2021] [Accepted: 11/16/2021] [Indexed: 10/19/2022]
Abstract
Specific pathogen-free (SPF) animals are bred and managed to exclude pathogens associated with significant morbidity or mortality that may secondarily pose a risk to public health, food safety and food security, and research replicability. Generating and maintaining SPF animals requires detailed biosecurity planning for control of housing, environmental, and husbandry factors and a history of regimented pathogen testing. Successful programs involve comprehensive risk analysis and exclusion protocols that are rooted in a thorough understanding of pathogen lifecycle and modes of transmission. In this manuscript we review the current state of SPF in domestic agriculture (pigs and poultry), aquaculture (salmonids and shrimp), and small laboratory mammals. As the use of laboratory fish, especially zebrafish (Danio rerio), as models of human disease is expanding exponentially, it is prudent to define standards for SPF in this field. We use the guiding principles from other SPF industries and evaluate zebrafish pathogens against criteria to be on an SPF list, to propose recommendations for establishing and maintaining SPF laboratory zebrafish.
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Affiliation(s)
- Katrina N Murray
- Zebrafish International Resource Center, University of Oregon, Eugene, OR 97403, USA.
| | - Tannia S Clark
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Myron J Kebus
- Wisconsin Department of Agriculture, Trade and Consumer Protection, Madison, WI 53708, USA
| | - Michael L Kent
- Zebrafish International Resource Center, University of Oregon, Eugene, OR 97403, USA; Department of Biomedical Sciences, Oregon State University, Corvallis, OR 97331, USA; Department of Microbiology, Oregon State University, Corvallis, OR 97331, USA
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12
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Middleton JR, Getchell RG, Flesner BK, Hess WJ, Johnson PJ, Scarfe AD, Starling DE. Considerations related to the use of molecular diagnostic tests in veterinary clinical and regulatory practice. J Am Vet Med Assoc 2021; 259:590-595. [PMID: 34448604 DOI: 10.2460/javma.259.6.590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Garcia KD, Coda KA, Smith AA, Condren AR, Deng Y, Perkins C, Sanchez LM, Fortman JD. The Effects of Water Volume and Bacterial Concentration on the Water Filtration Assay Used in Zebrafish Health Surveillance. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2021; 60:655-660. [PMID: 34470695 DOI: 10.30802/aalas-jaalas-21-000004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The number of zebrafish in biomedical research has increased exponentially over the past decades, leading to pressure onthe laboratory animal community to develop and refine techniques to monitor zebrafish health so that suitable stocks can be maintained for research. The water filtration assay is a promising technique in which water from a zebrafish system is filtered, and the filter analyzed by PCR. In the present report, we studied how the volume of water tested and the concentration of bacterial pathogens affected test results. To do so, we used stock solutions of 3 zebrafish pathogens: Edwardsiella ictaluri, Aeromonas hydrophila, and Mycobacterium marinum. We used these stocks to create solutions with known concentrations of each pathogen, ranging between 102 and 107 Colony Forming Units (CFU) per ml. One, 2, and 3 L of each solution was filtered using positive pressure, and the filters were submitted to a commercial lab for PCR testing. Results were fit with a logistic regression model, and the probability of obtaining a positive result were calculated. Test sensitivity varied by organism, but in general, test results were positively correlated with the volume of the water filtered and with the concentration of bacteria in solution. We conclude that a positive result can be expected for E. ictaluri at 105 CFU per mL, A. hydrophila at 106 CFU perml, and M. marinum at 106 CFU per mL, when 3 L of solution are filtered.
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Dyková I, Žák J, Reichard M, Součková K, Slabý O, Bystrý V, Blažek R. Histopathology of laboratory-reared Nothobranchius fishes: Mycobacterial infections versus neoplastic lesions. JOURNAL OF FISH DISEASES 2021; 44:1179-1190. [PMID: 33844322 DOI: 10.1111/jfd.13378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 06/12/2023]
Abstract
Short-lived killifishes of the genus Nothobranchius Peters, 1868 (Cyprinodontiformes) are considered promising model organisms for biomedical research on ageing and tumorigenesis. We conducted histopathological analysis of 411 adult individuals from three Nothobranchius species to study details on spontaneous age-related neoplastic lesions. Light microscopy based on H&E and toluidine blue-stained sections revealed (a) non-proliferative liver changes with pronounced vacuolation of hepatocytes; (b) proliferation of kidney haemopoietic tissue contributing to excretory system damage; (c) proliferation of splenic mononuclear haemoblasts accompanied by reduced erythropoiesis; (d) proliferation of mononuclear cell aggregates in the liver parenchyma; and (e) rare occurrence of hepatocellular adenomas. Ziehl-Neelsen (ZN) staining revealed that the proliferative lesions are a host defence response to mycobacterial infections manifested by activation of the mononuclear phagocytic system and atypical granulomatous inflammatory reaction. 16S rRNA analysis identified three species of Mycobacterium in our samples. Our findings turn attention to lesions which mimic neoplasms by their gross appearance and question the light microscopic interpretation of lesions unless differential ZN staining is included. Beyond the limitations of our morphological approach, the intensity of mycobacterial infections is a challenging opportunity for research into the molecular-genetic background of the mononuclear phagocytic system reaction in Nothobranchius killifish.
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Affiliation(s)
- Iva Dyková
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jakub Žák
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
- Department of Zoology, Faculty of Science, Charles University, Brno, Czech Republic
| | - Martin Reichard
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Kamila Součková
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Ondřej Slabý
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
- Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Vojtěch Bystrý
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Radim Blažek
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
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15
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Nguyen DT, Marancik D, Ware C, Griffin MJ, Soto E. Mycobacterium salmoniphilum and M. chelonae in Captive Populations of Chinook Salmon. JOURNAL OF AQUATIC ANIMAL HEALTH 2021; 33:107-115. [PMID: 33780059 DOI: 10.1002/aah.10124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Chinook Salmon Oncorhynchus tshawytscha is a keystone fish species in the Pacific Northwest. In 2019, unusual mortalities occurred in two different populations of cultured fingerlings from the same facility in California, USA. The systems consist of outdoor, enclosed, flow-through freshwater tanks that are maintained at 18 ± 1°C. Clinical signs and gross findings were only observed in one population and included abnormal swimming, inappetence, lethargy, skin discoloration, and the presence of multifocal nodular and ulcerative skin lesions. Microscopic lesions were infrequent and consisted of severe, locally extensive granulomatous dermatitis and myositis and mild, multifocal, granulomatous branchitis, myocarditis, and hepatitis. Intracellular acid-fast organisms were observed within areas of granulomatous myositis. Posterior kidney swabs were collected and inoculated in nutrient-rich and selective agar media and incubated at 25°C for 2 weeks. Visibly pure bacterial colonies were observed 7-10 d postinoculation. Partial sequences of 16S rRNA initially identified the recovered bacteria as members of the genus Mycobacterium. However, marked variability was observed among Mycobacterium spp. isolates by using repetitive extragenic palindromic polymerase chain reaction fingerprinting. Amplification and sequencing of the ribosomal RNA internal transcribed spacer, 65-kDa heat shock protein, and RNA polymerase β-subunit gene of the cultured isolates identified M. salmoniphilum and M. chelonae, discrete members of the M. chelonae-abscessus complex, isolated from diseased Chinook Salmon fingerlings.
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Affiliation(s)
- Diem Thu Nguyen
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, 2108 Tupper Hall, Davis, California, 95616-5270, USA
- Department of Pathobiology, School of Veterinary Medicine, St. George's University, True Blue, Grenada, West Indies
| | - David Marancik
- Department of Pathobiology, School of Veterinary Medicine, St. George's University, True Blue, Grenada, West Indies
| | - Cynthia Ware
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, 127 Experiment Station Road, Post Office Box 197, Stoneville, Mississippi, 38776, USA
| | - Matt J Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, 127 Experiment Station Road, Post Office Box 197, Stoneville, Mississippi, 38776, USA
| | - Esteban Soto
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, 2108 Tupper Hall, Davis, California, 95616-5270, USA
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16
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Estes JM, Altemara ML, Crim MJ, Fletcher CA, Whitaker JW. Behavioral and Reproductive Effects of Environmental Enrichment and Pseudoloma neurophilia infection on Adult Zebrafish ( Danio rerio). JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2021; 60:249-258. [PMID: 33952385 DOI: 10.30802/aalas-jaalas-20-000113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Recent studies have shown beneficial effects of environmental enrichment (EE) for zebrafish, while infection of zebrafish with the common pathogen Pseudoloma neurophilia has negative effects. This study investigates the effects of P. neurophilia infection and EE in housing and breeding tanks on measures of behavior, growth, and reproduction. Zebrafish were socially housed and were either infected, P. neurophilia-infected (PNI) (n = 12 tanks), or SPF for P. neurophilia (SPF) (n = 24 tanks). Fish were housed with or without EE, which consisted of placing plastic plants in the tanks; sprigs from plants were placed in half of the breeding tanks for half of breedings, alternating breeding tanks without EE weekly. Behavioral testing included the Novel Tank Diving Test (NTT) and Light/Dark Preference Test (LDT) conducted prior to breeding. At the end of the study, biometric data were collected. Histopathology and molecular analysis for common diseases in fish confirmed that SPF fish remained SPF and that fish from all PNI tanks were infected. PNI fish produced significantly fewer eggs and had lower body weights and lengths than did SPF fish. Fish with EE had longer body lengths, than did fish without EE, and male fish had longer body lengths than female fish. The biometric results and reproductive measures show that SPF fish exhibited better growth and suggest that EE in housing tanks could improve fish growth. The behavioral test results were inconclusive regard- ing whether infection status or EE altered anxiety-like behavior. Our results support other recent studies showing negative effects of P. neurophilia infection on zebrafish.
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Affiliation(s)
- Jenny M Estes
- Division of Comparative Medicine, University of North Carolina, Chapel Hill, North Carolina;,
| | - Michelle L Altemara
- Division of Comparative Medicine, University of North Carolina, Chapel Hill, North Carolina
| | | | - Craig A Fletcher
- Division of Comparative Medicine, University of North Carolina, Chapel Hill, North Carolina
| | - Julia W Whitaker
- Division of Comparative Medicine, University of North Carolina, Chapel Hill, North Carolina
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17
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Brenes-Soto A, Tye M, Esmail MY. The Role of Feed in Aquatic Laboratory Animal Nutrition and the Potential Impact on Animal Models and Study Reproducibility. ILAR J 2020; 60:197-215. [PMID: 33094819 DOI: 10.1093/ilar/ilaa006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 12/31/2022] Open
Abstract
Feed plays a central role in the physiological development of terrestrial and aquatic animals. Historically, the feeding practice of aquatic research species derived from aquaculture, farmed, or ornamental trades. These diets are highly variable, with limited quality control, and have been typically selected to provide the fastest growth or highest fecundity. These variations of quality and composition of diets may affect animal/colony health and can introduce confounding experimental variables into animal-based studies that impact research reproducibility.
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Affiliation(s)
- Andrea Brenes-Soto
- Department of Animal Science, University of Costa Rica, San José, Costa Rica
| | - Marc Tye
- Zebrafish Core Facility, University of Minnesota-Twin Cities, Minneapolis, Minnesota
| | - Michael Y Esmail
- Tufts Comparative Medicine Services, Tufts University Health Science Campus, Boston, Massachusetts
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18
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Mycobacteriosis and Infections with Non-tuberculous Mycobacteria in Aquatic Organisms: A Review. Microorganisms 2020; 8:microorganisms8091368. [PMID: 32906655 PMCID: PMC7564596 DOI: 10.3390/microorganisms8091368] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 12/19/2022] Open
Abstract
The Mycobacteriaceae constitute a family of varied Gram-positive organisms that include a large number of pathogenic bacteria. Among these, non-tuberculous mycobacteria are endemic worldwide and have been associated with infections in a large number of organisms, including humans and other mammals and reptiles, as well as fish. In this review, we summarize the most recent findings regarding this group of pathogens in fish. There, four species are most commonly associated with disease outbreaks: Mycobacterium marinum, the most common of these fish mycobacterial pathogens, Mycobacterium fortuitum, Mycobacterium gordonae, and Mycobacterium chelonae. These bacteria have a broad host range: they are zoonotic, and infections have been reported in a large number of fish species. The main route of entry of the bacterium into the fish is through the gastrointestinal route, and the disease is associated with ulcerative dermatitis as well as organomegaly and the development of granulomatous lesions in the internal organs. Mycobacteriaceae are slow-growing and fastidious and isolation is difficult and time consuming and diagnostic is mostly performed using serological and molecular tools. Control of the disease is also difficult: there is currently no effective vaccine and infections react poorly to antibiotherapy. For this reason, more research is needed on the subject of these vexing pathogens.
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19
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Kent M, Sanders J, Spagnoli S, Al-Samarrie C, Murray K. Review of diseases and health management in zebrafish Danio rerio (Hamilton 1822) in research facilities. JOURNAL OF FISH DISEASES 2020; 43:637-650. [PMID: 32291793 PMCID: PMC7253333 DOI: 10.1111/jfd.13165] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 01/27/2020] [Accepted: 02/17/2020] [Indexed: 05/09/2023]
Abstract
The use of zebrafish (Danio rerio) in biomedical research has expanded at a tremendous rate over the last two decades. Along with increases in laboratories using this model, we are discovering new and important diseases. We review here the important pathogens and diseases based on some 20 years of research and findings from our diagnostic service at the NIH-funded Zebrafish International Resource Center. Descriptions of the present status of biosecurity programmes and diagnostic and treatment approaches are included. The most common and important diseases and pathogens are two parasites, Pseudoloma neurophilia and Pseudocapillaria tomentosa, and mycobacteriosis caused by Mycobacterium chelonae, M. marinum and M. haemophilum. Less common but deadly diseases are caused by Edwardsiella ictaluri and infectious spleen and kidney necrosis virus (ISKNV). Hepatic megalocytosis and egg-associated inflammation and fibroplasia are common, apparently non-infectious, in zebrafish laboratories. Water quality diseases include supersaturation and nephrocalcinosis. Common neoplasms are spindle cell sarcomas, ultimobranchial tumours, spermatocytic seminomas and a small-cell carcinoma that is caused by a transmissible agent. Despite the clear biosecurity risk, researchers continue to use fish from pet stores, and here, we document two novel coccidia associated with significant lesions in zebrafish from one of these stores.
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Affiliation(s)
- M.L Kent
- Department of Microbiology, Oregon State University, Corvallis, Oregon 97331
- Department of Biomedical Sciences, Oregon State University, Corvallis, Oregon 97331
| | - J.L. Sanders
- Department of Biomedical Sciences, Oregon State University, Corvallis, Oregon 97331
| | - S. Spagnoli
- Department of Biomedical Sciences, Oregon State University, Corvallis, Oregon 97331
| | - C.E. Al-Samarrie
- Department of Microbiology, Oregon State University, Corvallis, Oregon 97331
| | - K.N. Murray
- Zebrafish International Resource Center, Eugene, Oregon 97403
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20
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Kent ML, Sanders JL, Spagnoli S, Al-Samarrie CE, Murray KN. Review of diseases and health management in zebrafish Danio rerio (Hamilton 1822) in research facilities. JOURNAL OF FISH DISEASES 2020; 43:637-650. [PMID: 32291793 DOI: 10.1111/jfd.13165j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 01/27/2020] [Accepted: 02/17/2020] [Indexed: 05/22/2023]
Abstract
The use of zebrafish (Danio rerio) in biomedical research has expanded at a tremendous rate over the last two decades. Along with increases in laboratories using this model, we are discovering new and important diseases. We review here the important pathogens and diseases based on some 20 years of research and findings from our diagnostic service at the NIH-funded Zebrafish International Resource Center. Descriptions of the present status of biosecurity programmes and diagnostic and treatment approaches are included. The most common and important diseases and pathogens are two parasites, Pseudoloma neurophilia and Pseudocapillaria tomentosa, and mycobacteriosis caused by Mycobacterium chelonae, M. marinum and M. haemophilum. Less common but deadly diseases are caused by Edwardsiella ictaluri and infectious spleen and kidney necrosis virus (ISKNV). Hepatic megalocytosis and egg-associated inflammation and fibroplasia are common, apparently non-infectious, in zebrafish laboratories. Water quality diseases include supersaturation and nephrocalcinosis. Common neoplasms are spindle cell sarcomas, ultimobranchial tumours, spermatocytic seminomas and a small-cell carcinoma that is caused by a transmissible agent. Despite the clear biosecurity risk, researchers continue to use fish from pet stores, and here, we document two novel coccidia associated with significant lesions in zebrafish from one of these stores.
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Affiliation(s)
- M L Kent
- Department of Microbiology, Oregon State University, Corvallis, Oregon
- Department of Biomedical Sciences, Oregon State University, Corvallis, Oregon
| | - J L Sanders
- Department of Biomedical Sciences, Oregon State University, Corvallis, Oregon
| | - S Spagnoli
- Department of Biomedical Sciences, Oregon State University, Corvallis, Oregon
| | - C E Al-Samarrie
- Department of Microbiology, Oregon State University, Corvallis, Oregon
| | - K N Murray
- Zebrafish International Resource Center, Eugene, Oregon
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21
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Lattos A, Giantsis IA, Karagiannis D, Michaelidis B. First detection of the invasive Haplosporidian and Mycobacteria parasites hosting the endangered bivalve Pinna nobilis in Thermaikos Gulf, North Greece. MARINE ENVIRONMENTAL RESEARCH 2020; 155:104889. [PMID: 32072991 DOI: 10.1016/j.marenvres.2020.104889] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/20/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
Mycobacterium sp. and Haplosporidium pinnae constitute invasive parasite species of bivalves, reported for the first time in the present study in the Aegean Sea and Thermaikos Gulf, respectively. During the last years, the endangered fan mussel (Pinna nobilis) experienced several mortality events in the Mediterranean Sea that caused deaths to 90% or more of their populations and have been attributed to infections by these pathogens. In Greece, two mass mortality events have been recently reported, namely in the Gulf of Kalloni and in Limnos island. In the present study we investigated the presence of both pathogens in P. nobilis from these marine areas as well as from Thermaikos Gulf using both histopathological microscopy and molecular markers. The detected parasite DNA was further quantified in the three populations utilizing a real time qPCR. Histopathological results indicated the presence of a Mycobacterium species alongside with the existence of the Haplosporidian parasite, which was identified in all mortality events in the Mediterranean Sea. The parasite was present in different phases mostly on the digestive gland epithelium. Phylogenetic analysis confirmed the taxonomy of the Haplosporidian parasite as the recently described Haplosporidium pinnae, whereas it failed to identify the Mycobacteria parasite at species level. While Mycobacterium sp. was detected in all examined specimens, H. pinnae was not detected in all diseased fan mussels. Interestingly, monitoring of P. nobilis population from Thermaikos Gulf, an estuary of extremely high importance for bivalve production, revealed the presence of both pathogens in a few specimens in higher quantity but with no symptoms of the disease. Besides, all the specimens from Thermaikos Gulf had inflammatory responses similarly to moribund specimens from mortality events.
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Affiliation(s)
- Athanasios Lattos
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Faculty of Science, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Ioannis A Giantsis
- Department of Animal Science, Faculty of Agricultural Sciences, University of Western Macedonia, 53100, Florina, Greece.
| | - Dimitrios Karagiannis
- National Reference Laboratory for Mollusc Diseases, Ministry of Rural Development and Food, 7 Frixou street, 54627, Thessaloniki, Greece
| | - Basile Michaelidis
- Laboratory of Animal Physiology, Department of Zoology, School of Biology, Faculty of Science, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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22
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Chang CT, Benedict S, Whipps CM. Transmission of Mycobacterium chelonae and Mycobacterium marinum in laboratory zebrafish through live feeds. JOURNAL OF FISH DISEASES 2019; 42:1425-1431. [PMID: 31418901 PMCID: PMC6744340 DOI: 10.1111/jfd.13071] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/18/2019] [Accepted: 07/22/2019] [Indexed: 05/04/2023]
Abstract
The zebrafish (Danio rerio) is a popular vertebrate model organism used in a wide range of research fields. Mycobacteriosis, caused by Mycobacterium species, is particularly concerning because it is a common disease associated with chronic infections in these fish. Infections are also a source of uncontrolled experimental variance that may influence research results. Live feeds for zebrafish are common and include paramecia (Paramecium caudatum), brine shrimp (Artemia franciscana) and rotifers (Branchionus spp.). Although nutritionally beneficial, live feeds may pose a biosecurity risk. In this study, we investigate transmission of Mycobacterium chelonae and Mycobacterium marinum through these three live feeds. We show that all three live feeds ingest both M. marinum and M. chelonae and can transmit mycobacterial infections to zebrafish. This observation emphasizes the need for live feeds to be included in the consideration of potential biosecurity risks. This study is of importance to other beyond the zebrafish community, including those of additional aquatic models and those using live feeds for other types of aquaculture.
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Affiliation(s)
- Carolyn T Chang
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, New York
| | - Samuel Benedict
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, New York
| | - Christopher M Whipps
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, New York
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23
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Chang CT, Benedict S, Whipps CM. Transmission of Mycobacterium chelonae and Mycobacterium marinum in laboratory zebrafish through live feeds. JOURNAL OF FISH DISEASES 2019; 36:681-4. [PMID: 31418901 DOI: 10.1111/jfd.12071] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 11/14/2012] [Indexed: 05/04/2023]
Abstract
The zebrafish (Danio rerio) is a popular vertebrate model organism used in a wide range of research fields. Mycobacteriosis, caused by Mycobacterium species, is particularly concerning because it is a common disease associated with chronic infections in these fish. Infections are also a source of uncontrolled experimental variance that may influence research results. Live feeds for zebrafish are common and include paramecia (Paramecium caudatum), brine shrimp (Artemia franciscana) and rotifers (Branchionus spp.). Although nutritionally beneficial, live feeds may pose a biosecurity risk. In this study, we investigate transmission of Mycobacterium chelonae and Mycobacterium marinum through these three live feeds. We show that all three live feeds ingest both M. marinum and M. chelonae and can transmit mycobacterial infections to zebrafish. This observation emphasizes the need for live feeds to be included in the consideration of potential biosecurity risks. This study is of importance to other beyond the zebrafish community, including those of additional aquatic models and those using live feeds for other types of aquaculture.
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Affiliation(s)
- Carolyn T Chang
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, New York
| | - Samuel Benedict
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, New York
| | - Christopher M Whipps
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, New York
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24
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Miller M, Sabrautzki S, Beyerlein A, Brielmeier M. Combining fish and environmental PCR for diagnostics of diseased laboratory zebrafish in recirculating systems. PLoS One 2019; 14:e0222360. [PMID: 31513657 PMCID: PMC6742364 DOI: 10.1371/journal.pone.0222360] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/27/2019] [Indexed: 01/10/2023] Open
Abstract
Precise knowledge of the health status of experimental fish is crucial to obtain high scientific and ethical standards in biomedical research. In addition to the use of sentinel fish, the examination of diseased fish is a fundamental part of all health monitoring concepts. PCR assays offer excellent sensitivity and the ability to test a broad variety of pathogenic agents in different sample types. Recently, it was shown that analysis of environmental samples such as water, sludge or detritus from static tanks can complement PCR analysis of fish and is actually more reliable for certain pathogens. In our study, we investigated whether the analysis of filtered water mixed with detritus of tanks including fish showing clinical signs of illness is suitable to complement health monitoring programs in recirculating systems. The obtained data indicate that pathogens such as Pseudoloma neurophilia or Myxidium streisingeri were exclusively or mainly found in fish, while mycobacteria were predominantly present in environmental samples. A combination of both sample types seems to be required for the detection of a broad range of infectious agents in zebrafish colonies using real-time PCR technology.
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Affiliation(s)
- Manuel Miller
- Research Unit Comparative Medicine, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- * E-mail:
| | - Sibylle Sabrautzki
- Research Unit Comparative Medicine, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Andreas Beyerlein
- Institute of Computational Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Markus Brielmeier
- Research Unit Comparative Medicine, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
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25
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Marancik D, Collins J, Afema J, Lawrence C. Exploring the advantages and limitations of sampling methods commonly used in research facilities for zebrafish health inspections. Lab Anim 2019; 54:373-385. [PMID: 31387447 DOI: 10.1177/0023677219864616] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Examining zebrafish populations for the presence of disease is an integral component of managing fish health in research facilities. Currently, many different strategies are used for zebrafish fish health inspections, which is a scenario that may result in subjective and biased diagnostic evaluations. The goal of this study was to compare the success of pathogen detection between a sample size of randomly selected fish (n = 60) that provides 95% confidence in pathogen detection based on a presumed pathogen prevalence level ≥5%, and other subpopulations and sample numbers commonly submitted for diagnostic testing within a 1000 tank, 30,000 fish, recirculating research system. This included fish collected from a sump tank (n = 53), sentinel fish (n = 11), and fish that were found moribund or freshly dead (n = 18). Additionally, five fish from each subpopulation were collected for histopathologic examination. A second study used retrospective data to examine pathogen distribution between systems (n = 2-5) in multi-system facilities (n = 5) using a sample size of 60 fish per system. For the pathogens detected, results supported the use of representative sample numbers rather than smaller numbers of populations considered more at risk. The exception to this is for the moribund/mortality group, which may be a resource for targeted surveillance of select pathogens. Each system within multi-system facilities should be considered separate units in terms of fish health inspections and biosecurity. Development of these evidence-based standards for fish health inspections in zebrafish systems enhances fish welfare, provides identification of potentially zoonotic pathogens, and ensures scientific integrity and reproducibility of research results.
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Affiliation(s)
- David Marancik
- Department of Pathobiology, St. George's University School of Veterinary Medicine, Grenada
| | | | - Josephine Afema
- Paul G. Allen School for Global Animal Health, College of Veterinary Medicine, Washington State University, USA
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26
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Chang CT, Lewis J, Whipps CM. Source or Sink: Examining the Role of Biofilms in Transmission of Mycobacterium spp. in Laboratory Zebrafish. Zebrafish 2019; 16:197-206. [PMID: 30835168 DOI: 10.1089/zeb.2018.1689] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Zebrafish health is a primary research concern because diseases can have unintended impacts on experimental endpoints. Ideally, research would be conducted using disease-free fish or fish with known disease status. Mycobacteriosis is a common bacterial disease in wild and captive fishes, including zebrafish. Despite its prevalence, the dynamics of transmission and potential sources of mycobacterial infections in zebrafish are only partially understood. One suspected natural infection source is surface biofilms on tanks and other system components. This study investigates the role that tank biofilms play in mycobacteriosis in laboratory zebrafish by evaluating the establishment of biofilms from bacteria shed from fish, and conversely, the acquisition of infections in fish from surface biofilms. We found that zebrafish infected with Mycobacterium chelonae shed bacteria through feces, and bacteria are transmitted to tank biofilms from one to 16 weeks postinfection. We also found that zebrafish acquire M. chelonae infections as soon as 2 weeks when introduced to tanks with established M. chelonae biofilms. The results from this study highlight the role that tank biofilms play as both a reservoir and source of mycobacterial infections in zebrafish. Results support the inclusion of biofilm surveillance and prevention as part of a disease control program in zebrafish research facilities.
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Affiliation(s)
- Carolyn T Chang
- Department of Environment and Forest Biology, State University of New York College of Environmental Science, Syracuse, New York
| | - Jet'aime Lewis
- Department of Environment and Forest Biology, State University of New York College of Environmental Science, Syracuse, New York
| | - Christopher M Whipps
- Department of Environment and Forest Biology, State University of New York College of Environmental Science, Syracuse, New York
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27
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Iaria C, Saoca C, Guerrera MC, Ciulli S, Brundo MV, Piccione G, Lanteri G. Occurrence of diseases in fish used for experimental research. Lab Anim 2019; 53:619-629. [DOI: 10.1177/0023677219830441] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The objective of the present study was to evaluate the occurrence of pathogens and diseases in laboratory fish over a 10-year period at the Centre for Experimental Fish Pathology of Sicily, University of Messina. This report also emphasizes the adverse effects of subclinical infections on research endpoints, as well as the importance of animal health with respect to welfare. Infections in fish used for research can alter experimental outcomes, increase the variability of data, and impede experimental reproducibility. For this purpose, 411 diseased fish of different species (out of a total of 2820 fish) that belonged to four marine species ( Dicentrarchus labrax, Sparus aurata, Argyrosomus regius and Mugil cephalus) and to four fresh water species ( Danio rerio, Carassius auratus, Xiphophorus variatus and Poecilia reticulata) were examined in this study. Our results showed that mycobacteriosis and myxosporidiosis were the most important diseases found in our research fish, and the results represent a useful tool to obtain wider knowledge on the incidence of various diseases in different fish species. Further studies in this field are necessary to improve knowledge on the state of the health of fish used for research.
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Affiliation(s)
- Carmelo Iaria
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy
| | - Concetta Saoca
- Department of Veterinary Sciences, Experimental Ichthyopathology Center of Sicily, University of Messina, Italy
| | - Maria Cristina Guerrera
- Department of Veterinary Sciences, Experimental Ichthyopathology Center of Sicily, University of Messina, Italy
| | - Sara Ciulli
- Department of Veterinary Medical Sciences, University of Bologna, Italy
| | - Maria Violetta Brundo
- Department of Biological, Geological and Environmental Sciences, University of Catania, Italy
| | - Giuseppe Piccione
- Department of Veterinary Sciences, Experimental Ichthyopathology Center of Sicily, University of Messina, Italy
| | - Giovanni Lanteri
- Department of Veterinary Sciences, Experimental Ichthyopathology Center of Sicily, University of Messina, Italy
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28
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Colby LA, Zitzow L. Applied Institutional Approaches for the Evaluation and Management of Zoonoses in Contemporary Laboratory Animal Research Facilities. ILAR J 2018; 59:134-143. [DOI: 10.1093/ilar/ily016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 08/23/2018] [Indexed: 01/05/2023] Open
Abstract
Abstract
Zoonoses, diseases transmitted between animals and humans, have been a concern in laboratory animal medicine for decades. Exposure to zoonotic organisms not only poses health risks to personnel and research animals but may also affect research integrity. Early laboratory animal programs were ineffective at excluding and preventing transmission of zoonotic diseases: the health status of the animals were often unknown, endemic diseases occurred frequently, housing conditions were less controlled, and veterinary care programs were decentralized. Over time, these conditions improved, but despite this, zoonotic diseases remain a contemporary concern. To reduce the incidence of zoonoses, management should perform an accurate risk assessment that takes into account the type of research performed, animal species used, animal sources, and housing conditions. Specific research practices, such as the use of biological materials, can also affect the risk assessment and should be considered. Once identified, the characteristics of significant zoonotic organisms can be examined. In addition, personnel attitudes and training, facility design and management, equipment availability, personal protective equipment used, standard operating procedures, and the institution’s vermin control program can impact the risk assessment. The effectiveness of the occupational health and safety program at managing risks of zoonoses should also be examined. Risk assessment, in the context of zoonotic disease prevention, is a complex exercise and is most effective when a team approach is used and includes research, husbandry, veterinary, and biosafety personnel.
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Affiliation(s)
- Lesley A Colby
- Department of Comparative Medicine, University of Washington, Seattle, Washington
| | - Lois Zitzow
- Department of Population Health, University of Georgia College of Veterinary Medicine, Athens, Georgia
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Hamm JT, Ceger P, Allen D, Stout M, Maull EA, Baker G, Zmarowski A, Padilla S, Perkins E, Planchart A, Stedman D, Tal T, Tanguay RL, Volz DC, Wilbanks MS, Walker NJ. Characterizing sources of variability in zebrafish embryo screening protocols. ALTEX 2018; 36:103-120. [PMID: 30415271 PMCID: PMC10424490 DOI: 10.14573/altex.1804162] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 10/30/2018] [Indexed: 11/23/2022]
Abstract
There is a need for fast, efficient, and cost-effective hazard identification and characterization of chemical hazards. This need is generating increased interest in the use of zebrafish embryos as both a screening tool and an alternative to mammalian test methods. A Collaborative Workshop on Aquatic Models and 21st Century Toxicology identified the lack of appropriate and consistent testing protocols as a challenge to the broader application of the zebrafish embryo model. The National Toxicology Program established the Systematic Evaluation of the Application of Zebrafish in Toxicology (SEAZIT) initiative to address the lack of consistent testing guidelines and identify sources of variability for zebrafish-based assays. This report summarizes initial SEAZIT information-gathering efforts. Investigators in academic, government, and industry laboratories that routinely use zebrafish embryos for chemical toxicity testing were asked about their husbandry practices and standard protocols. Information was collected about protocol components including zebrafish strains, feed, system water, disease surveillance, embryo exposure conditions, and endpoints. Literature was reviewed to assess issues raised by the investigators. Interviews revealed substantial variability across design parameters, data collected, and analysis procedures. The presence of the chorion and renewal of exposure media (static versus static-renewal) were identified as design parameters that could potentially influence study outcomes and should be investigated further with studies to determine chemical uptake from treatment solution into embryos. The information gathered in this effort provides a basis for future SEAZIT activities to promote more consistent practices among researchers using zebrafish embryos for toxicity evaluation.
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Affiliation(s)
- Jon T Hamm
- Integrated Laboratory Systems, Research Triangle Park, NC, USA
| | - Patricia Ceger
- Integrated Laboratory Systems, Research Triangle Park, NC, USA
| | - David Allen
- Integrated Laboratory Systems, Research Triangle Park, NC, USA
| | - Matt Stout
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Elizabeth A Maull
- National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Greg Baker
- Battelle, Life Sciences Research, Columbus, OH, USA
| | | | - Stephanie Padilla
- Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Edward Perkins
- United States Army Engineer Research and Development Center, Vicksburg, MS, USA
| | - Antonio Planchart
- Department of Biological Sciences and Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, USA
| | | | - Tamara Tal
- Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Robert L Tanguay
- Department of Environmental & Molecular Toxicology, Oregon State University, Corvallis, OR, USA
| | - David C Volz
- Department of Environmental Sciences, University of California, Riverside, CA, USA
| | - Mitch S Wilbanks
- United States Army Engineer Research and Development Center, Vicksburg, MS, USA
| | - Nigel J Walker
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
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Rácz A, Dwyer T, Killen SS. Overview of a Disease Outbreak and Introduction of a Step-by-Step Protocol for the Eradication of Mycobacterium haemophilum in a Zebrafish System. Zebrafish 2018; 16:77-86. [PMID: 30358522 PMCID: PMC6357262 DOI: 10.1089/zeb.2018.1628] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In 2017, the zebrafish unit at University of Glasgow experienced a detrimental outbreak of pathogenic bacterium, Mycobacterium haemophilum. The presence of other bacterial species was also confirmed by bacteriology growth in the same unit. The affected individuals composed of a wild-origin parental population sourced from India and their F1 offspring generation. Bacteria were diagnostically confirmed to be present systemically in fish and within the water and biofilm of the recirculating zebrafish system. In the absence of a publicly accessible step-by-step disinfectant protocol for these difficult-to-eliminate pathogens, we devised a successful procedure to eradicate mycobacteria and Aeromonas species after colony removal using Cleanline Chlorine tablets (active ingredient Sodium dichloroisocyanurate) and Virkon Aquatic®. Postdisinfection diagnostics did not detect pathogens in the system or in the new fish inhabiting the system that were tested. Newly established fish colonies have not shown similar clinical signs or disease-induced mortality in the 1-year period following system disinfection and repopulation. We present a historical background of the bacterial outbreak and a disinfection method which can be replicated in other zebrafish facilities—at small or large scales—for reliable mycobacterium removal. This procedure can be implemented as a disinfection protocol before the introduction of a new fish population to a previously contaminated system.
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Affiliation(s)
- Anita Rácz
- 1 Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Toni Dwyer
- 1 Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom.,2 Institute of Aquaculture, University of Stirling, Stirling, United Kingdom
| | - Shaun S Killen
- 1 Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
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31
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Burns AR, Watral V, Sichel S, Spagnoli S, Banse AV, Mittge E, Sharpton TJ, Guillemin K, Kent ML. Transmission of a common intestinal neoplasm in zebrafish by cohabitation. JOURNAL OF FISH DISEASES 2018; 41:569-579. [PMID: 29023774 PMCID: PMC5844789 DOI: 10.1111/jfd.12743] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 08/31/2017] [Accepted: 09/03/2017] [Indexed: 05/04/2023]
Abstract
Intestinal neoplasms are common in zebrafish (Danio rerio) research facilities. These tumours are most often seen in older fish and are classified as small cell carcinomas or adenocarcinomas. Affected fish populations always contain subpopulations with preneoplastic lesions, characterized by epithelial hyperplasia or inflammation. Previous observations indicated that these tumours are unlikely caused by diet, water quality or genetic background, suggesting an infectious aetiology. We performed five transmission experiments by exposure of naïve fish to affected donor fish by cohabitation or exposure to tank effluent water. Intestinal lesions were observed in recipient fish in all exposure groups, including transmissions from previous recipient fish, and moribund fish exhibited a higher prevalence of neoplasms. We found a single 16S rRNA sequence, most similar to Mycoplasma penetrans, to be highly enriched in the donors and exposed recipients compared to unexposed control fish. We further tracked the presence of the Mycoplasma sp. using a targeted PCR test on individual dissected intestines or faeces or tank faeces. Original donor and exposed fish populations were positive for Mycoplasma, while corresponding unexposed control fish were negative. This study indicates an infectious aetiology for these transmissible tumours of zebrafish and suggests a possible candidate agent of a Mycoplasma species.
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Affiliation(s)
- Adam R. Burns
- Institute of Ecology and Evolutionary Biology, University of Oregon, Eugene, OR 97403
| | - Virginia. Watral
- Department of Microbiology Oregon State University, Corvallis, OR 97331
| | - Sophie Sichel
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403
| | - Sean Spagnoli
- Department of Biomedical Sciences, Oregon State University, Corvallis, OR 97331
| | - Allison V. Banse
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403
| | - Erika Mittge
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403
| | - Thomas J. Sharpton
- Department of Microbiology Oregon State University, Corvallis, OR 97331
- Department of Statistics, Oregon State University, Corvallis, OR 97331
| | - Karen Guillemin
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403
- Humans and the Microbiome Program, Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
| | - Michael L. Kent
- Department of Microbiology Oregon State University, Corvallis, OR 97331
- Department of Biomedical Sciences, Oregon State University, Corvallis, OR 97331
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32
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Mocho JP, Martin DJ, Millington ME, Saavedra Torres Y. Environmental Screening of Aeromonas hydrophila, Mycobacterium spp., and Pseudocapillaria tomentosa in Zebrafish Systems. J Vis Exp 2017. [PMID: 29286459 PMCID: PMC5755534 DOI: 10.3791/55306] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Health monitoring systems are developed and used in zebrafish research facilities because pathogens of Danio rerio such as Aeromonas hydrophila, Mycobacterium spp., and Pseudocapillaria tomentosa have the potential to impair animal welfare and research. The fish are typically analyzed post mortem to detect microbes. The use of sentinels is a suggested way to improve the sensitivity of the surveillance and to reduce the number of animals to sample. The setting of a pre-filtration sentinel tank out of a recirculating system is described. The technique is developed to prevent water pollution and to represent the fish population by a careful selection of age, gender, and strains. In order to use the minimum number of animals, techniques to screen the environment are also detailed. Polymerase Chain Reaction (PCR) on surface sump swabs is used to significantly improve the detection of some prevalent and pathogenic mycobacterial species such as Mycobacterium fortuitum, Mycobacterium haemophilum, and Mycobacterium chelonae. Another environmental method consists of processing the sludge at the bottom of a holding tank or sump to look for P. tomentosa eggs. This is a cheap and fast technique that can be applied in quarantine where a breeding device is submerged into the holding tank of imported animals. Finally, PCR is applied to the sludge sample and A. hydrophila is detected at the sump's bottom and surface. Generally, these environmental screening techniques applied to these specific pathogens have led to an increased sensitivity compared to the testing of pre-filtration sentinels.
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33
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Chang CT, Amack JD, Whipps CM. Zebrafish Embryo Disinfection with Povidone-Iodine: Evaluating an Alternative to Chlorine Bleach. Zebrafish 2017; 13 Suppl 1:S96-S101. [PMID: 27351620 DOI: 10.1089/zeb.2015.1229] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Mycobacteriosis is a common bacterial infection in laboratory zebrafish caused by several different species and strains of Mycobacterium, including both rapid and slow growers. One control measure used to prevent mycobacterial spread within and between facilities is surface disinfection of eggs. Recent studies have highlighted the effectiveness of povidone-iodine (PVPI) on preventing propagation of Mycobacterium spp. found in zebrafish colonies. We evaluated the effect of disinfection using 12.5-50 ppm PVPI (unbuffered and buffered) on zebrafish exposed at 6 or 24 h postfertilization (hpf) to determine if this treatment is suitable for use in research zebrafish. Our results show that 6 hpf embryos are less sensitive to treatment as fewer effects on mortality, developmental delay, and deformity were observed. We also found that buffered PVPI treatment results in a greater knockdown of Mycobacterium chelonae and Mycobacterium marinum, as well as results in decreased harmful effects on embryos. Treatments of shorter (2 min vs. 5 min) duration were also more effective at killing mycobacteria in addition to resulting in fewer effects on embryo health. In addition, we compared the efficacy of a rinsing regimen to rinsing and disinfecting. Based on the findings of this study, we recommend disinfecting embryos for 2 min with buffered PVPI at 12.5-25 ppm.
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Affiliation(s)
- Carolyn T Chang
- 1 Department of Environmental and Forest Biology, State University of New York, College of Environmental Science and Forestry , Syracuse, New York
| | - Jeffrey D Amack
- 2 Department of Cell and Developmental Biology, State University of New York, Upstate Medical University , Syracuse, New York
| | - Christopher M Whipps
- 1 Department of Environmental and Forest Biology, State University of New York, College of Environmental Science and Forestry , Syracuse, New York
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34
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Mason T, Snell K, Mittge E, Melancon E, Montgomery R, McFadden M, Camoriano J, Kent ML, Whipps CM, Peirce J. Strategies to Mitigate a Mycobacterium marinum Outbreak in a Zebrafish Research Facility. Zebrafish 2017; 13 Suppl 1:S77-87. [PMID: 27351618 PMCID: PMC4931754 DOI: 10.1089/zeb.2015.1218] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
In 2011, the zebrafish research facility at the University of Oregon experienced an outbreak of Mycobacterium marinum that affected both research fish and facility staff. A thorough review of risks to personnel, the zebrafish veterinary care program, and zebrafish husbandry procedures at the research facility followed. In the years since 2011, changes have been implemented throughout the research facility to protect the personnel, the fish colony, and ultimately the continued success of the zebrafish model research program. In this study, we present the history of the outbreak, the changes we implemented, and recommendations to mitigate pathogen outbreaks in zebrafish research facilities.
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Affiliation(s)
- Timothy Mason
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Kathy Snell
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Erika Mittge
- 2 Institute of Molecular Biology, University of Oregon , Eugene, Oregon
| | - Ellie Melancon
- 3 Institute of Neuroscience, University of Oregon , Eugene, Oregon
| | | | - Marcie McFadden
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Javier Camoriano
- 1 Aquatic Animal Care Services, University of Oregon , Eugene, Oregon
| | - Michael L Kent
- 4 Department of Microbiology and Biomedical Sciences, Oregon State University , Corvallis, Oregon
| | - Christopher M Whipps
- 5 SUNY-ESF, State University of New York College of Environmental Science and Forestry , Syracuse, New York
| | - Judy Peirce
- 3 Institute of Neuroscience, University of Oregon , Eugene, Oregon
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35
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Peneyra SM, Cardona-Costa J, White J, Whipps CM, Riedel ER, Lipman NS, Lieggi C. Transmission of Pseudoloma neurophilia in Laboratory Zebrafish (Danio rerio) When Using Mass Spawning Chambers and Recommendations for Chamber Disinfection. Zebrafish 2017; 15:63-72. [PMID: 29048998 DOI: 10.1089/zeb.2017.1493] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Pseudoloma neurophilia, a microsporidium that primarily infects neural tissues, is a common pathogen in laboratory zebrafish. The risk of parasite transmission with different spawning apparatuses and the effectiveness of disinfection are unknown. In this study, we spawned uninfected zebrafish with P. neurophilia-infected zebrafish in either 50 L mass spawning chambers (MSCs) or 1 L standard breeding tanks (BTs). Fish were spawned once or thrice, with and without chamber disinfection between uses, to evaluate risk of vertical and horizontal transmission. Six disinfection protocols were tested to determine which effectively eliminated residual spores. We demonstrated that three consecutive uses of an MSC significantly increased the risk of transmission to other fish when compared to the use of BTs or only one spawning event in an MSC (both p < 0.0001). Vertical transmission was not detected with any method. Disinfection with ∼100 ppm bleach soak (pH ∼7.0), 75 ppm Wescodyne® soak, and 175 ppm Wescodyne Plus spray was 100% effective in eliminating spores from the MSCs. Disinfection of MSCs before spawning did not decrease P. neurophilia transmission when infected fish remained present in the breeding population. Researchers should avoid using endemically infected fish in MSCs to minimize transmission of pathogens within their colonies.
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Affiliation(s)
- Samantha M Peneyra
- 1 Tri-Institutional Training Program in Laboratory Animal Medicine and Science , New York, New York.,2 Center of Comparative Medicine and Pathology, Memorial Sloan Kettering Cancer Center and Weill Cornell Medicine , New York, New York
| | - Jose Cardona-Costa
- 2 Center of Comparative Medicine and Pathology, Memorial Sloan Kettering Cancer Center and Weill Cornell Medicine , New York, New York
| | - Julie White
- 1 Tri-Institutional Training Program in Laboratory Animal Medicine and Science , New York, New York.,2 Center of Comparative Medicine and Pathology, Memorial Sloan Kettering Cancer Center and Weill Cornell Medicine , New York, New York
| | - Christopher M Whipps
- 3 Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry , Syracuse, New York
| | - Elyn R Riedel
- 4 Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center , New York, New York
| | - Neil S Lipman
- 1 Tri-Institutional Training Program in Laboratory Animal Medicine and Science , New York, New York.,2 Center of Comparative Medicine and Pathology, Memorial Sloan Kettering Cancer Center and Weill Cornell Medicine , New York, New York
| | - Christine Lieggi
- 1 Tri-Institutional Training Program in Laboratory Animal Medicine and Science , New York, New York.,2 Center of Comparative Medicine and Pathology, Memorial Sloan Kettering Cancer Center and Weill Cornell Medicine , New York, New York
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36
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Chang CT, Doerr KM, Whipps CM. Antibiotic treatment of zebrafish mycobacteriosis: tolerance and efficacy of treatments with tigecycline and clarithromycin. JOURNAL OF FISH DISEASES 2017; 40:1473-1485. [PMID: 28422304 PMCID: PMC5593761 DOI: 10.1111/jfd.12619] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 01/14/2017] [Accepted: 01/17/2017] [Indexed: 05/04/2023]
Abstract
Zebrafish (Danio rerio) are a popular model organism used in a growing number of research fields. Maintaining healthy, disease-free laboratory fish is important for the integrity of many of these studies. Mycobacteriosis is a chronic bacterial infection caused by several Mycobacterium spp. and is the second most common disease found in laboratory zebrafish. Current mycobacteriosis control measures recommend the removal of infected fish and in severe outbreaks, depopulation. These measures can be effective, but less disruptive measures should be assessed for controlling mycobacteriosis, particularly when valuable and rare lines of fish are affected. Here, the in vivo efficacy of two drug candidates, tigecycline (1 μg g-1 ) and clarithromycin (4 μg g-1 ), was tested in adult zebrafish experimentally infected with Mycobacterium chelonae. We assessed both short (14 day)- and long-term (30 day) treatments and evaluated fecundity and pathological endpoints. Fecundity and histology results show that zebrafish tolerated antibiotics. Antibiotic treatments did not significantly impact the prevalence of acid-fast granulomas; however, the severity of infections (acid-fast granuloma intensity) was significantly decreased following treatments.
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Affiliation(s)
- C T Chang
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, NY, USA
| | - K M Doerr
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, NY, USA
| | - C M Whipps
- Department of Environment and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, NY, USA
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37
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Tsang B, Zahid H, Ansari R, Lee RCY, Partap A, Gerlai R. Breeding Zebrafish: A Review of Different Methods and a Discussion on Standardization. Zebrafish 2017; 14:561-573. [PMID: 28873037 DOI: 10.1089/zeb.2017.1477] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In recent years, a rapidly increasing number of scientific papers have been published that utilize zebrafish (Danio rerio) as an alternative model organism in the study of a wide range of biological phenomena from cancer to behavior. This is, in large part, due to the prolific nature, relative ease of maintenance, and sufficiently high genetic homology of zebrafish to humans. With the surge of zebrafish use in animal research, the variations in methodologies of breeding and husbandry of this species have also increased. Investigators usually focus on the development and implementation of rigorous laboratory control that is specific to their studies. We suggest that the same scrutiny and attention may be required for the methods of breeding and housing of zebrafish. This article reviews a variety of zebrafish husbandry and breeding techniques and conditions employed around the world. It discusses factors ranging from numerous aspects of rearing/housing conditions through the sex ratio of the breeding group to the composition of the diet of zebrafish that may vary across laboratories. It provides some feedback on the potential pros and cons of the different methods. It argues that there is a substantial need for systematic analysis of these methods, that is, the effects of environmental factors on zebrafish health and breeding. It also discusses the question as to whether some degree of standardization of these methods is needed to enhance cross-laboratory comparability of results.
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Affiliation(s)
- Benjamin Tsang
- Department of Psychology, University of Toronto Mississauga , Mississauga, Canada
| | - Hifsa Zahid
- Department of Psychology, University of Toronto Mississauga , Mississauga, Canada
| | - Rida Ansari
- Department of Psychology, University of Toronto Mississauga , Mississauga, Canada
| | | | - Aman Partap
- Department of Psychology, University of Toronto Mississauga , Mississauga, Canada
| | - Robert Gerlai
- Department of Psychology, University of Toronto Mississauga , Mississauga, Canada
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38
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Crim MJ, Lawrence C, Livingston RS, Rakitin A, Hurley SJ, Riley LK. Comparison of Antemortem and Environmental Samples for Zebrafish Health Monitoring and Quarantine. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE : JAALAS 2017; 56:412-424. [PMID: 28724491 PMCID: PMC5517331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 10/14/2016] [Accepted: 01/12/2017] [Indexed: 06/07/2023]
Abstract
Molecular diagnostic assays offer both exquisite sensitivity and the ability to test a wide variety of sample types. Various types of environmental sample, such as detritus and concentrated water, might provide a useful adjunct to sentinels in routine zebrafish health monitoring. Similarly, antemortem sampling would be advantageous for expediting zebrafish quarantine, without euthanasia of valuable fish. We evaluated the detection of Mycobacterium chelonae, M. fortuitum, M. peregrinum, Pseudocapillaria tomentosa, and Pseudoloma neurophilia in zebrafish, detritus, pooled feces, and filter membranes after filtration of 1000-, 500-, and 150-mL water samples by real-time PCR analysis. Sensitivity varied according to sample type and pathogen, and environmental sampling was significantly more sensitive than zebrafish sampling for detecting Mycobacterium spp. but not for Pseudocapillaria neurophilia or Pseudoloma tomentosa. The results of these experiments provide strong evidence of the utility of multiple sample types for detecting pathogens according to each pathogen's life cycle and ecological niche within zebrafish systems. In a separate experiment, zebrafish subclinically infected with M. chelonae, M. marinum, Pleistophora hyphessobryconis, Pseudocapillaria tomentosa, or Pseudoloma neurophilia were pair-spawned and individually tested with subsets of embryos from each clutch that received no rinse, a fluidizing rinse, or were surface-disinfected with sodium hypochlorite. Frequently, one or both parents were subclinically infected with pathogen(s) that were not detected in any embryo subset. Therefore, negative results from embryo samples may not reflect the health status of the parent zebrafish.
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Affiliation(s)
- Marcus J Crim
- IDEXX BioResearch, Columbia, Missouri, Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri;,
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39
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Kušar D, Zajc U, Jenčič V, Ocepek M, Higgins J, Žolnir-Dovč M, Pate M. Mycobacteria in aquarium fish: results of a 3-year survey indicate caution required in handling pet-shop fish. JOURNAL OF FISH DISEASES 2017; 40:773-784. [PMID: 27747884 DOI: 10.1111/jfd.12558] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 07/29/2016] [Accepted: 07/29/2016] [Indexed: 06/06/2023]
Abstract
Fish are commonly infected with non-tuberculous mycobacteria (NTM), which should be regarded as potential pathogens when handling aquarium fish and equipment. This study examined 107 aquarium fish from pet shops. Cultivation of the fish samples using different selective media was conducted for identification of NTM. Isolates were identified using the GenoType Mycobacterium common mycobacteria and additional species assays, sequencing of the 16S rRNA and rpoB genes, and real-time PCR assay for identification of Mycobacterium (M.) marinum. Among the investigated fish, 79.4% (85/107) were positive for mycobacteria, with 8.2% (7 of 85) having two mycobacterial species present. Among the positive fish, the common pathogens M. marinum, Mycobacterium fortuitum (M. fortuitum group) and Mycobacterium chelonae were identified in approx. 90% of fish and other NTM species in 10%, including Mycobacterium peregrinum/septicum, Mycobacterium gordonae, Mycobacterium arupense, Mycobacterium kansasii, Mycobacterium ulcerans and Mycobacterium setense. The well-known human pathogen M. marinum was present in 10.6% of the positive fish (9 of 85). The species of mycobacteria identified in the study are not only recognized as aquarium fish pathogens, but can also cause pathology in humans. Microbiological and clinical communities should therefore be sensitized to the role of NTM in infections associated with exposure to aquarium fish.
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Affiliation(s)
- D Kušar
- Veterinary Faculty, Institute of Microbiology and Parasitology, University of Ljubljana, Ljubljana, Slovenia
| | - U Zajc
- Veterinary Faculty, Institute of Microbiology and Parasitology, University of Ljubljana, Ljubljana, Slovenia
| | - V Jenčič
- Veterinary Faculty, Institute of Pathology, Wild Animals, Fish and Bees, University of Ljubljana, Ljubljana, Slovenia
| | - M Ocepek
- Veterinary Faculty, Institute of Microbiology and Parasitology, University of Ljubljana, Ljubljana, Slovenia
| | - J Higgins
- Mycobacteria and Brucella Section, National Veterinary Services Laboratories, United States Department of Agriculture - Animal and Plant Health Inspection Service (USDA-APHIS), Ames, IA, USA
| | - M Žolnir-Dovč
- National Reference Laboratory for Mycobacteria, University Clinic of Respiratory and Allergic Diseases, Golnik, Slovenia
| | - M Pate
- Veterinary Faculty, Institute of Microbiology and Parasitology, University of Ljubljana, Ljubljana, Slovenia
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40
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Strike TB, Feltrer Y, Flach E, Macgregor SK, Guillaume S. Investigation and management of an outbreak of multispecies mycobacteriosis in Australian lungfish (Neoceratodus fosteri) including the use of triple antibiotic treatment. JOURNAL OF FISH DISEASES 2017; 40:557-570. [PMID: 27453998 DOI: 10.1111/jfd.12535] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 06/18/2016] [Accepted: 06/20/2016] [Indexed: 06/06/2023]
Abstract
Disease due to non-tuberculous mycobacteria (NTM) is common in fish. Current recommendations focus on outbreak management by depopulating entire fish stocks and disinfecting tanks. Treatment is not advocated. Treatment may be appropriate, however, where individual, valuable fish are concerned. ZSL London Zoo managed an outbreak of mycobacteriosis in a valuable group of imported F1 captive-bred Australian lungfish (Neoceratodus fosteri) by depopulation, isolation, extensive testing and daily oral antibiotic treatment. Four species of Mycobacterium (M. marinum, M. fortuitum, M. chelonae and M. peregrinum) were involved in this outbreak, each with unique antibiotic sensitivities. Triple therapy with rifampicin, doxycycline and enrofloxacin for 8 months was the most effective antibiotic combination, resulting in full disease resolution. No side effects were noted and, more than 18 months post-treatment, no recurrence had occurred. This is the first report of mycobacterial disease in lungfish and the first report of a polymycobacterial outbreak in fish involving these four species of Mycobacterium. This report demonstrates the value of extensive isolation and identification. Also, as therapies currently advised in standard texts did not reflect the antibiotic sensitivity of the NTM found in the fish reported here, we recommend that antibiotic treatment should always be based on sensitivity testing.
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Affiliation(s)
- T B Strike
- London Zoo Veterinary Department, Zoological Society of London (ZSL), London, UK
| | - Y Feltrer
- London Zoo Veterinary Department, Zoological Society of London (ZSL), London, UK
| | - E Flach
- London Zoo Veterinary Department, Zoological Society of London (ZSL), London, UK
| | - S K Macgregor
- London Zoo Veterinary Department, Zoological Society of London (ZSL), London, UK
| | - S Guillaume
- London Zoo Aquarium, Zoological Society of London (ZSL), London, UK
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41
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Meritet DM, Mulrooney DM, Kent ML, Löhr CV. Development of Quantitative Real-Time PCR Assays for Postmortem Detection of Mycobacterium spp. Common in Zebrafish ( Danio rerio) Research Colonies. JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE : JAALAS 2017; 56:131-141. [PMID: 28315641 PMCID: PMC5361037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 07/24/2016] [Accepted: 07/25/2016] [Indexed: 06/06/2023]
Abstract
Mycobacterium spp. infections are common in zebrafish kept in research facilities. These comorbidities can substantially modulate the responses of these fish to external and internal stimuli. Therefore, diagnostic tests to detect Mycobacterium spp. infections in zebrafish colonies prove essential. Here, we outline the development of quantitative simplex real-time PCR assays to detect the 3 Mycobacterium species most commonly identified in laboratory zebrafish. The assays targeted the heatshock protein 65 gene of M. marinum, M. chelonae, and M. haemophilum. The assays are both highly specific and sensitive for fresh-frozen samples and highly specific and moderately sensitive for formalin-fixed paraffin-embedded (FFPE) samples. Two sampling techniques for FFPE samples of sagittally sectioned zebrafish were evaluated. Both paraffin cores targeting granulomas containing bacteria and scrolls from the entire fish yielded DNA of equivalent quantity and purity. The diagnostic sensitivity of cores was superior to that of scrolls for M. chelonae and M. haemophilum but not M. marinum. The assays are cost-effective and ideally suited to diagnosing common Mycobacterium spp. infections in zebrafish.
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Affiliation(s)
- Danielle M Meritet
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon
| | - Donna M Mulrooney
- Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon
| | - Michael L Kent
- Department of Biomedical Sciences, Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, Department of Microbiology, College of Science, Oregon State University, Corvallis, Oregon
| | - Christiane V Löhr
- Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Oregon State University, Corvallis, Oregon;,
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42
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Thirunavukkarasu S, Plain KM, de Silva K, Marais BJ, Whittington RJ. Applying the One Health Concept to Mycobacterial Research - Overcoming Parochialism. Zoonoses Public Health 2017; 64:401-422. [PMID: 28084673 DOI: 10.1111/zph.12334] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Indexed: 12/27/2022]
Abstract
Mycobacterial infections remain a public health problem. Historically important, globally ubiquitous and with a wide host range, we are still struggling to control mycobacterial infections in humans and animals. While previous reviews have focused on individual mycobacterial infections in either humans or animals, a comprehensive review of the zoonotic aspect of mycobacteria in the context of the One Health initiative is lacking. With the purpose of providing a concise and comprehensive resource, we have collated literature to address the zoonotic potential of different mycobacterial species and elaborate on the necessity for an inter-sectorial approach to attain a new vision to combat mycobacterial infections.
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Affiliation(s)
- S Thirunavukkarasu
- Faculty of Veterinary Science, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia.,Boise Veterans Affairs Medical Center, Boise, ID, USA
| | - K M Plain
- Faculty of Veterinary Science, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia
| | - K de Silva
- Faculty of Veterinary Science, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia
| | - B J Marais
- Marie Bashir Institute for Infectious Diseases and Biosecurity and the Centre for Research Excellence in Emerging Infections, University of Sydney, Sydney, NSW, Australia
| | - R J Whittington
- Faculty of Veterinary Science, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia
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43
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Collymore C, Crim MJ, Lieggi C. Recommendations for Health Monitoring and Reporting for Zebrafish Research Facilities. Zebrafish 2016; 13 Suppl 1:S138-48. [PMID: 26991393 PMCID: PMC4932782 DOI: 10.1089/zeb.2015.1210] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The presence of subclinical infection or clinical disease in laboratory zebrafish may have a significant impact on research results, animal health and welfare, and transfer of animals between institutions. As use of zebrafish as a model of disease increases, a harmonized method for monitoring and reporting the health status of animals will facilitate the transfer of animals, allow institutions to exclude diseases that may negatively impact their research programs, and improve animal health and welfare. All zebrafish facilities should implement a health monitoring program. In this study, we review important aspects of a health monitoring program, including choice of agents, samples for testing, available testing methodologies, housing and husbandry, cost, test subjects, and a harmonized method for reporting results. Facilities may use these recommendations to implement their own health monitoring program.
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Affiliation(s)
- Chereen Collymore
- Division of Comparative Medicine, University of Toronto, Toronto, Ontario, Canada
| | | | - Christine Lieggi
- Center for Comparative Medicine and Pathology, Weill Cornell Medical College and Memorial Sloan Kettering Cancer Center, New York, New York
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44
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Borges AC, Pereira N, Franco M, Vale L, Pereira M, Cunha MV, Amaro A, Albuquerque T, Rebelo M. Implementation of a Zebrafish Health Program in a Research Facility: A 4-Year Retrospective Study. Zebrafish 2016; 13 Suppl 1:S115-26. [PMID: 27186875 PMCID: PMC4931741 DOI: 10.1089/zeb.2015.1230] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In the past two decades, zebrafish (Danio rerio)-based research has contributed to significant scientific advances. Still, husbandry and health programs did not evolve at the same pace, as evidenced by the absence of general guidelines. Health monitoring is essential to animal welfare, to permit animal exchanges across facilities, to contribute to robust experimental results, and for data reproducibility. In this study, we report a health program implemented in a zebrafish research facility to prevent, monitor, and control pathogen, and disease dissemination. This program includes quarantine, routine health screening of sentinels, and nonroutine screenings of retired animals and sick/moribund individuals. An extensive list of clinical signs, lesions, and pathogens was monitored based on: daily observation of fish, necropsy, histology, and bacterial culture. The results indicate that the combined analysis of sentinels with the evaluation of sick/moribund animals enables a comprehensive description not only of pathogen prevalence but also of clinical and histopathologic lesions of resident animals. The establishment of a quarantine program revealed to be effective in the reduction of Pseudoloma neurophilia frequency in the main aquaria room. Finally, characterization of the colony health status based on this multiapproach program shows a low prevalence of lesions and pathogens in the facility.
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Affiliation(s)
| | - Nuno Pereira
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- ISPA—Instituto Universitário, Lisboa, Portugal
- Faculty of Veterinary Medicine, Lusófona University, Lisbon, Portugal
| | - Maysa Franco
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Liliana Vale
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | | | - Mónica V. Cunha
- Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
- Biosystems and Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
- INIAV, IP- Instituto Nacional de Investigação Agrária e Veterinária, Oeiras, Portugal
| | - Ana Amaro
- INIAV, IP- Instituto Nacional de Investigação Agrária e Veterinária, Oeiras, Portugal
| | - Teresa Albuquerque
- INIAV, IP- Instituto Nacional de Investigação Agrária e Veterinária, Oeiras, Portugal
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45
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Murray KN, Varga ZM, Kent ML. Biosecurity and Health Monitoring at the Zebrafish International Resource Center. Zebrafish 2016; 13 Suppl 1:S30-8. [PMID: 27031282 PMCID: PMC4931758 DOI: 10.1089/zeb.2015.1206] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The Zebrafish International Resource Center (ZIRC) is a repository and distribution center for mutant, transgenic, and wild-type zebrafish. In recent years annual imports of new zebrafish lines to ZIRC have increased tremendously. In addition, after 15 years of research, we have identified some of the most virulent pathogens affecting zebrafish that should be avoided in large production facilities, such as ZIRC. Therefore, while importing a high volume of new lines we prioritize safeguarding the health of our in-house fish colony. Here, we describe the biosecurity and health-monitoring program implemented at ZIRC. This strategy was designed to prevent introduction of new zebrafish pathogens, minimize pathogens already present in the facility, and ensure a healthy zebrafish colony for in-house uses and shipment to customers.
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Affiliation(s)
- Katrina N. Murray
- Zebrafish International Resource Center, University of Oregon, Eugene, Oregon
| | - Zoltán M. Varga
- Zebrafish International Resource Center, University of Oregon, Eugene, Oregon
| | - Michael L. Kent
- Zebrafish International Resource Center, University of Oregon, Eugene, Oregon
- Department of Microbiology, Oregon State University, Corvallis, Oregon
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46
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Legendre L, Guillet B, Leguay E, Meunier E, Labrut S, Keck N, Bardotti M, Michelet L, Sohm F. RESAMA: A Network for Monitoring Health and Husbandry Practices in Aquatic Research Facilities. Zebrafish 2016; 13 Suppl 1:S56-65. [PMID: 27192449 DOI: 10.1089/zeb.2015.1199] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Health monitoring is a crucial aspect of the management of any research animal house. RESAMA is a network strong of 60 academic and private partners acting in France since the end of 2012. The network aims to increase awareness of animal caretakers and researchers on health management issues in facilities holding aquatic model species (zebrafish, Xenopus, medaka, Mexican tetra). To do so, each partner research facility will be visited at least once. The visiting team is composed at least of one veterinarian and one zootechnician specialized in aquatic species. The visit results in a health-monitoring assessment of the facility, which includes a sampling for histo-pathological, bacteriological, and molecular pathogen detection. During the visit, rearing practices are also reviewed through an interview of animal caretakers. However, the present report essentially focuses on the health-monitoring aspect. The ultimate goal of the project is to provide a network-wide picture of health issues in aquatic facilities. Performed in parallel, the rearing practice assessment will ultimately help to establish rational relationship between handling practices and animal health in aquatic facilities. The study is still in progress. Here, we describe the results to be drawn from an analysis of the 23 facilities that had been visited so far. We sampled 720 fish and 127 amphibians and performed a little less than 1400 individual tests.
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Affiliation(s)
- Laurent Legendre
- 1 UMS AMAGEN, CNRS, INRA, Université Paris-Saclay , Gif sur Yvette, France
| | - Brigitte Guillet
- 2 CRB Xénope, UMS 3387 CNRS, Université de Rennes 1 , Rennes, France
| | | | | | | | - Nicolas Keck
- 5 Laboratoire Départemental Vétérinaire de l'Hérault, Montpellier, France
| | - Massimiliano Bardotti
- 6 UMR 9197 Neuro-PSI, CNRS, Université Paris-Sud , Université Paris-Saclay, Gif sur Yvette, France
| | - Lorraine Michelet
- 7 Université Paris-Est, Laboratoire National de Référence de la Tuberculose, Unité de Zoonoses Bactériennes, Laboratoire de Santé Animale , ANSES, Maisons-Alfort, France
| | - Frédéric Sohm
- 1 UMS AMAGEN, CNRS, INRA, Université Paris-Saclay , Gif sur Yvette, France
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47
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Mocho JP. Three-Dimensional Screen: A Comprehensive Approach to the Health Monitoring of Zebrafish. Zebrafish 2016; 13 Suppl 1:S132-7. [PMID: 27182750 PMCID: PMC4931732 DOI: 10.1089/zeb.2015.1200] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Considering the numbers of zebrafish held in the laboratories, it is relevant to develop some tools to monitor the health of the animals, as well as their biotope. Environmental samples can be used to detect aquatic pathogens. Comprehensive health monitoring would thus seek pathogens in three dimensions of the animals and microbes' habitat: the fish, the sludge, and the water. This three-dimensional approach is called the 3D screen and it introduces some complementary tools to routine sentinel screening. For example, sludge and sump swabs analyses allow an efficient detection of pathogens at a low cost and with a fast turnover. These assays are particularly useful in cases of Pseudocapillaria tomentosa infestation or Mycobacterium haemophilum outbreak. Indeed, such a broader choice of diagnostic tests gives flexibility for the veterinarian to investigate Mycobacterium spp. presence in the water systems and fish colonies. Some other robust additional analysis, like the mortality rate monitoring, quickens the decision-making process. The 3D screen describes how this new toolbox can be used efficiently to monitor laboratory fish health.
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48
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Mason T, Snell K, Mittge E, Melancon E, Montgomery R, McFadden M, Camoriano J, Kent ML, Whipps CM, Peirce J. Strategies to Mitigate a Mycobacterium marinumOutbreak in a Zebrafish Research Facility. Zebrafish 2016. [DOI: 10.1089/zeb.2015.1218.rev] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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49
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Kent ML, Watral VG, Kirchoff NS, Spagnoli ST, Sharpton TJ. Effects of Subclinical Mycobacterium chelonae Infections on Fecundity and Embryo Survival in Zebrafish. Zebrafish 2016; 13 Suppl 1:S88-95. [PMID: 27031171 DOI: 10.1089/zeb.2015.1204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Mycobacteriosis is the second most common infectious disease in zebrafish research colonies, and most often this is caused by Mycobacterium chelonae. The infection is characterized by multiple granulomas in the kidney, coelomic cavity, particularly the ovary. However, most fish still appear clinically normal. Developmental genetics remain a primary area of research with the zebrafish model, and hence, an important use of adult zebrafish is as brood fish to produce embryos. We investigated the effects of experimentally induced M. chelonae infections on fecundity. A total of 480 5D wild-type zebrafish were divided into four groups: controls, males infected, females infected, and both sexes. Exposed fish developed high prevalence of infection, including many females with ovarian infections. Fish were then first subjected to four separate group spawns with four replicate tanks/group. Then, a third of the fish were subjected to pairwise spawns, representing 20 pairs/group, and then the pairs were evaluated by histopathology. Overall, the group and pairwise spawns resulted numerous eggs and viable embryos. However, we found no statistical correlations between infection status and number of eggs or viability. In contrast to Egg Associated Inflammation and Fibroplasia, lesions in infected ovaries were more localized, with large regions of the ovary appearing normal.
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Affiliation(s)
- Michael L Kent
- 1 Department of Microbiology, Oregon State University , Corvallis, Oregon.,2 Department of Biomedical Sciences, Oregon State University , Corvallis, Oregon
| | - Virginia G Watral
- 1 Department of Microbiology, Oregon State University , Corvallis, Oregon
| | - Nicole S Kirchoff
- 1 Department of Microbiology, Oregon State University , Corvallis, Oregon
| | - Sean T Spagnoli
- 2 Department of Biomedical Sciences, Oregon State University , Corvallis, Oregon
| | - Thomas J Sharpton
- 1 Department of Microbiology, Oregon State University , Corvallis, Oregon.,3 Department of Statistics, Oregon State University , Corvallis, Oregon
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50
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Hobbs MR, Shankaran SS, James WL. Controlling Endemic Pathogens-Challenges and Opportunities. Zebrafish 2016; 13 Suppl 1:S66-71. [PMID: 26982004 DOI: 10.1089/zeb.2015.1207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
By most measures, the University of Utah Centralized Zebrafish Animal Resource is a successful zebrafish core facility: we house ∼4000-5000 tanks for over 16 research groups; provide services and equipment for ∼150 users; are currently undergoing an expansion by 3000 tanks; and have been praised by institutional and national regulatory agencies for the cleanliness and efficiency of our facility. In recent years, we have implemented new programs to improve the overall health of our colony and believe we have seen a reduction in apparently sick fish. However, there are still deficiencies in our monitoring and pathogen control programs. Our histopathology sample sizes have been insufficient to estimate prevalence, but our sentinel tank program reveals the presence of Pseudoloma neurophilia and myxozoan, presumably Myxidium streisinger, in our facility. As we develop protocols to further reduce the burden of disease, we are focused on defining our baseline, establishing goals, and implementing methods to monitor our progress. The data generated by this approach will allow us to evaluate and implement the most cost-effective protocols to improve fish health.
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Affiliation(s)
- Maurine R Hobbs
- 1 CZAR Zebrafish Core Facility, University of Utah , Salt Lake City, Utah
| | - Sunita S Shankaran
- 2 Cardiovascular Research and Training Institute, University of Utah , Salt Lake City, Utah
| | - William L James
- 1 CZAR Zebrafish Core Facility, University of Utah , Salt Lake City, Utah
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