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Cardoso IR, de Lima CS, dos Reis RB, Pinto ACA, Pissinatti T, Kugelmeier T, Neto SFDC, da Silva FA, Santos HLC. Occurrence of Free-Living Amoebae in Non-Human Primate Gut. Trop Med Infect Dis 2024; 9:108. [PMID: 38787041 PMCID: PMC11125615 DOI: 10.3390/tropicalmed9050108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 05/25/2024] Open
Abstract
The gut microbiome reflects health and predicts possible disease in hosts. A holistic view of this community is needed, focusing on identifying species and dissecting how species interact with their host and each other, regardless of whether their presence is beneficial, inconsequential, or detrimental. The distribution of gut-associated eukaryotes within and across non-human primates is likely driven by host behavior and ecology. To ascertain the existence of free-living amoebae (FLA) in the gut of wild and captive non-human primates, 101 stool samples were collected and submitted to culture-dependent microscopy examination and DNA sequencing. Free-living amoebae were detected in 45.4% (46/101) of fecal samples analyzed, and their morphological characteristics matched those of Acanthamoeba spp., Vermamoeba spp., heterolobosean amoeboflagellates and fan-shaped amoebae of the family Vannellidae. Sequence analysis of the PCR products revealed that the suspected amoebae are highly homologous (99% identity and 100% query coverage) with Acanthamoeba T4 genotype and Vermamoeba vermiformis amoebae. The results showed a great diversity of amoebae in the non-human primate's microbiome, which may pose a potential risk to the health of NHPs. To our knowledge, this is the first report of free-living amoebae in non-human primates that are naturally infected. However, it is unknown whether gut-borne amoebae exploit a viable ecological niche or are simply transient residents in the gut.
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Affiliation(s)
- Igor Rodrigues Cardoso
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro 21040-360, Brazil; (I.R.C.); (C.S.d.L.); (R.B.d.R.)
| | - Clezia Siqueira de Lima
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro 21040-360, Brazil; (I.R.C.); (C.S.d.L.); (R.B.d.R.)
- Instituto de Saúde de Nova Friburgo, da Universidade Federal Fluminense, Nova Friburgo 28625-650, Brazil
| | - Rhagner Bonono dos Reis
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro 21040-360, Brazil; (I.R.C.); (C.S.d.L.); (R.B.d.R.)
| | - Ana Cristina Araujo Pinto
- Instituto de Ciência e Tecnologia em Biomodelos/FIOCRUZ, Rio de Janeiro 26382-462, Brazil; (A.C.A.P.); (T.P.); (T.K.); (F.A.d.S.)
| | - Thalita Pissinatti
- Instituto de Ciência e Tecnologia em Biomodelos/FIOCRUZ, Rio de Janeiro 26382-462, Brazil; (A.C.A.P.); (T.P.); (T.K.); (F.A.d.S.)
| | - Tatiana Kugelmeier
- Instituto de Ciência e Tecnologia em Biomodelos/FIOCRUZ, Rio de Janeiro 26382-462, Brazil; (A.C.A.P.); (T.P.); (T.K.); (F.A.d.S.)
| | | | - Fabio Alves da Silva
- Instituto de Ciência e Tecnologia em Biomodelos/FIOCRUZ, Rio de Janeiro 26382-462, Brazil; (A.C.A.P.); (T.P.); (T.K.); (F.A.d.S.)
| | - Helena Lúcia Carneiro Santos
- Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro 21040-360, Brazil; (I.R.C.); (C.S.d.L.); (R.B.d.R.)
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Zamli KM, Hashim F, Razali SA, Yusoff HM, Mohamad H, Abdullah F, Asari A. Synthesis, anti-amoebic activity and molecular docking simulation of eugenol derivatives against Acanthamoeba sp. Saudi Pharm J 2023; 31:101703. [PMID: 37546528 PMCID: PMC10400915 DOI: 10.1016/j.jsps.2023.101703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 07/10/2023] [Indexed: 08/08/2023] Open
Abstract
Amoebae of the genus Acanthamoeba can cause diseases such as amoebic keratitis and granulomatous amoebic encephalitis. Until now, treatment options for these diseases have not been fully effective and have several drawbacks. Therefore, research into new drugs is needed for more effective treatment of Acanthamoeba infections. Eugenol, a phenolic aromatic compound mainly derived from cloves, has a variety of pharmaceutical properties. In this study, nine eugenol derivatives (K1-K9), consisting of five new and four known compounds, were synthesized and screened for their antiamoebic properties against Acanthamoeba sp. The structure of these compounds was characterized spectroscopically by Fourier transform infrared (FTIR), Ultraviolet-Visible (UV-Vis), 1H and 13C Nuclear Magnetic Resonance (NMR) and mass spectrometer (MS). The derived molecules were screened for antiamoebic activity by determining IC50 values based on 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and observation of amoeba morphological changes by light and fluorescence microscopy. Most of the tested compounds possessed strong to moderate cytotoxic effects against trophozoite cells with IC50 values ranging from 0.61 to 24.83 μg/mL. Observation of amoebae morphology by light microscopy showed that the compounds caused the transformed cells to be roundish and reduced in size. Furthermore, fluorescence microscopy observation using acridine orange (AO) and propidium iodide (PI) (AO/PI) staining showed that the cells have damaged membranes by displaying a green cytoplasm with orange-stained lysosomes. Acidification of the lysosomal structure indicated disruption of the internal structure of Acanthamoeba cells when treated with eugenol derivatives. The observed biological results were also confirmed by interaction simulations based on molecular docking between eugenol derivatives and Acanthamoeba profilin. These interactions could affect the actin-binding ability of the protein, disrupting the shape and mobility of Acanthamoeba. The overall results of this study demonstrate that eugenol derivatives can be considered as potential drugs against infections caused by Acanthamoeba.
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Affiliation(s)
- Khairunisa Mohd Zamli
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Fatimah Hashim
- Biological Security and Sustainability Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Siti Aisyah Razali
- Biological Security and Sustainability Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Hanis Mohd Yusoff
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
- Advanced Nano Materials (ANoMa) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Habsah Mohamad
- Institute of Biotechnology Marine, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Fauziah Abdullah
- Phytochemistry Programme, Natural Products Division, Forest Research Institute of Malaysia, 52109 Kepong, Selangor, Malaysia
| | - Asnuzilawati Asari
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
- Advanced Nano Materials (ANoMa) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
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Tuska-Szalay B, Kelly H, Takács N, Kontschán J, Votýpka J, Hornok S. Molecular evidence of Monocercomonas and Acanthamoeba in the feces of captive reptiles. Parasitol Res 2022; 121:3681-3687. [PMID: 36184660 DOI: 10.1007/s00436-022-07677-3] [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: 09/12/2022] [Accepted: 09/20/2022] [Indexed: 11/29/2022]
Abstract
Reptiles are frequently kept as pet animals. They are considered as important reservoirs of protozoa with veterinary-medical significance. At a reptile farm in Ireland, fecal samples were collected from 98 captive reptiles, representing 43 species of three orders (Squamata, Testudines, and Crocodylia). After DNA extraction, all samples were screened by conventional PCRs, targeting the ribosomal small subunit (SSU) RNA and alpha-tubulin genes of trichomonads and SSU RNA gene of Acanthamoeba spp. One leopard gecko (Eublepharis macularius) was positive for a not yet reported species/genotype of the genus Monocercomonas, different from M. colubrorum. Various Acanthamoeba genotypes were detected in six reptilian species, i.e., Acanthamoeba genotype T11 in Eunectes notaeus and Heloderma suspectum/horridum; genotype T4 in Varanus exanthematicus, Chlamydosaurus kingii, and Macrochelys temminckii; and the genotype T13 in Iguana iguana. Some of these amoeba species might have clinicopathological significance in both humans and animals. Our findings highlight the importance to monitor pathogenic protozoa in pet as well as wildlife reptiles, as a source of possible infection for animals and humans living nearby.
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Affiliation(s)
- Barbara Tuska-Szalay
- Department of Parasitology and Zoology, University of Veterinary Medicine, Budapest, Hungary.
| | - Hannah Kelly
- Department of Parasitology and Zoology, University of Veterinary Medicine, Budapest, Hungary
| | - Nóra Takács
- Department of Parasitology and Zoology, University of Veterinary Medicine, Budapest, Hungary.,New Blood-Sucking Parasites and Vector-Borne Pathogens Research Group, ELKH-ÁTE Climate Change, Budapest, Hungary
| | - Jenő Kontschán
- Plant Protection Institute, Centre for Agricultural Research, ELKH, Budapest, Hungary
| | - Jan Votýpka
- Biology Centre, Institute of Parasitology, Czech Academy of Sciences, České Budějovice, Czech Republic.,Department of Parasitology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Sándor Hornok
- Department of Parasitology and Zoology, University of Veterinary Medicine, Budapest, Hungary.,New Blood-Sucking Parasites and Vector-Borne Pathogens Research Group, ELKH-ÁTE Climate Change, Budapest, Hungary
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Ledbetter EC, McDonough SP, Dong L, Liotta JL, Bowman DD, Kim SG. Acanthamoeba sclerokeratitis in a cat. J Am Vet Med Assoc 2021; 257:1280-1287. [PMID: 33269959 DOI: 10.2460/javma.257.12.1280] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
CASE DESCRIPTION A 12-year-old neutered male domestic shorthair cat with chronic anterior uveitis and secondary glaucoma of the right eye was examined for persistent blepharospasm 2 weeks after corneal debridement and grid keratotomy for nonhealing superficial ulcerative keratitis. CLINICAL FINDINGS Examination of the right eye revealed a central superficial corneal ulcer associated with corneal epithelial and subepithelial infiltrates and mild aqueous flare. Structures consistent with amoeboid cysts and trophozoites were detected in the cornea by in vivo confocal microscopy. Suppurative keratitis was identified cytologically. An Acanthamoeba spp was isolated through culture and identified by a PCR assay of corneal specimens. TREATMENT AND OUTCOME Symptomatic and antiamoebic (polyhexamethylene biguanide 0.02% ophthalmic solution) treatments were instituted. Over the following 6 weeks, the cat lost vision in the affected eye and lesions progressed to nonulcerative stromal keratitis associated with a dense paracentral corneal stroma ring infiltrate and anterior lens luxation. The globe was enucleated, and lymphoplasmacytic sclerokeratitis, anterior uveitis, and retinal detachment were noted. Acanthamoeba organisms were detected within the corneal stroma and anterior sclera with histologic and immunohistochemical stains. The amoebae were classified to the Acanthamoeba T4 genotype by DNA sequencing. The cat had no medical problems attributed to Acanthamoeba infection over 36 months after enucleation, until the cat was lost to follow-up. CLINICAL RELEVANCE Naturally acquired Acanthamoeba sclerokeratitis is described in a cat for the first time. Acanthamoeba infection should be considered for cats with superficial corneal disease refractory to appropriate treatments and especially occurring after ocular trauma, including keratotomy.
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MORTALITY IN COQUEREL'S SIFAKAS ( PROPITHECUS COQUERELI) UNDER HUMAN CARE: A RETROSPECTIVE SURVEY FROM THE DUKE LEMUR CENTER 1990-2015. J Zoo Wildl Med 2019; 49:315-323. [PMID: 29900793 DOI: 10.1638/2017-0242.1] [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: 11/21/2022] Open
Abstract
Coquerel's sifakas ( Propithecus coquereli) are diurnal, folivorous lemurs native to Madagascar and one of only two members of the genus Propithecus currently housed in human care settings outside of Madagascar. This species has a lifespan of approximately 30 yr but minimal information exists regarding morbidity and mortality in human care settings. In this retrospective study, medical records, postmortem exam, and autopsy reports from 56 animals housed at the Duke Lemur Center from 1990 to 2015 were evaluated. Mortality assessments included age, sex, time of year, histopathological findings, major organ system impacted, and etiological factors. Mortality was most prevalent among adults greater than 2 yr of age (42.9%) and neonates less than 7 days of age (30.4%). The top four morphological diagnoses accounted for 51.7% of all deaths and included stillbirths (19.6%), enteritis-colitis (12.5%), failure to thrive (10.7%), and systemic protozoal infections (8.9%). The two most commonly affected organ systems in animals over 7 days of age were multisystem disease (30.8%) and the gastrointestinal system (28.2%). Infections were the most common etiology with bacterial being the most prevalent followed by protozoal infections. The results provide insight into common causes of mortality of this species and can be used to guide management of this endangered primate and improve longevity in human care settings.
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Gaide N, Pelandakis M, Robveille C, Albaric O, Jouvion G, Souchon M, Risler A, Abadie J. Necrotizing Meningoencephalitis in a Captive Black and White Ruffed Lemur (Varecia variegata variegata) Caused by Acanthamoeba T4 Genotype. J Comp Pathol 2015; 153:231-5. [PMID: 26297109 DOI: 10.1016/j.jcpa.2015.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 06/29/2015] [Accepted: 07/14/2015] [Indexed: 11/16/2022]
Abstract
A mature male, black and white ruffed lemur (Varecia variegata variegata) died in a zoological garden after a 4-day history of lethargy and non-responsive convulsions. Necropsy and histopathological examinations revealed acute necrotizing and haemorrhagic meningoencephalitis with intralesional amoebas confirmed by immunohistochemistry. Acanthamoeba T4 genotype was identified as the causative agent of the brain lesion, based on amplification and sequencing of 18S ribosomal RNA genes. The presence of free-living amoebas in water and mud from the lemur's environment was investigated by morphological and molecular analyses. The two predominant genera, representing 80% of isolated amoebas, were Naegleria spp. and Acanthamoeba spp. All Acanthamoeba isolates belonged to the T4 genotype. To the author's knowledge, this is the first report of a meningoencephalitis due to Acanthamoeba T4 genotype in Lemuridae with concurrent analysis of pathological tissues and environment.
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Affiliation(s)
- N Gaide
- Department of Pathology, LUNAM, ONIRIS, Nantes, France.
| | - M Pelandakis
- Université de Lyon, CNRS UMR 5240, Université Lyon 1, F-69622, Villeurbanne, France
| | - C Robveille
- Department of Pathology, LUNAM, ONIRIS, Nantes, France
| | - O Albaric
- Laboratoire d'Histopathologie Animale, LUNAM, ONIRIS, Nantes, France
| | - G Jouvion
- Institut Pasteur, Histopathologie Humaine et Modèles Animaux, 28 Rue du Docteur Roux, Paris, France
| | - M Souchon
- Université de Lyon, CNRS UMR 5240, Université Lyon 1, F-69622, Villeurbanne, France
| | - A Risler
- Université de Lyon, CNRS UMR 5240, Université Lyon 1, F-69622, Villeurbanne, France
| | - J Abadie
- Department of Pathology, LUNAM, ONIRIS, Nantes, France; Laboratoire d'Histopathologie Animale, LUNAM, ONIRIS, Nantes, France
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Mansfield KG, Sasseville VG, Westmoreland SV. Molecular Localization Techniques in the Diagnosis and Characterization of Nonhuman Primate Infectious Diseases. Vet Pathol 2013; 51:110-26. [DOI: 10.1177/0300985813509386] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Molecular localization techniques remain important diagnostic and research tools for the pathologist evaluating nonhuman primate tissues. In situ hybridization and immunohistochemistry protocols have been developed for many important pathogens of nonhuman primates, including RNA and DNA viruses, prions, and bacterial, protozoal, and fungal pathogens. Such techniques will remain critical in defining the impact and relevance of novel agents on animal health and disease. A comparative pathology perspective often provides valuable insight to the best strategy for reagent development and can also facilitate interpretation of molecular localization patterns. Such a perspective is grounded in a firm understanding of microbe-host pathobiology. This review summarizes current molecular localization protocols used in the diagnosis of selected primate infectious diseases.
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Affiliation(s)
- K. G. Mansfield
- Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | | | - S. V. Westmoreland
- New England Primate Research Center, Harvard Medical School, Southborough, MA, USA
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Pimentel LA, Dantas AFM, Uzal F, Riet-Correa F. Meningoencephalitis caused by Naegleria fowleri in cattle of northeast Brazil. Res Vet Sci 2012; 93:811-2. [PMID: 22285703 DOI: 10.1016/j.rvsc.2012.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 12/30/2011] [Accepted: 01/03/2012] [Indexed: 11/25/2022]
Abstract
Primary amoebic meningoencephalitis is an acute disease of the central nervous system of humans and animals caused by Naegleria fowleri. This report describes a case of meningoencephalitis caused by N. fowleri in a crossbred, one-year-old bovine with progressive neurological signs. At necropsy there was thickening of the meninges and multifocal areas of malacia in the thalamus, caudal and rostral colliculi, parietal and occipital cortex, and cerebellum. Histologically there was multifocal necrosupurative meningoencephalitis associated with areas of malacia containing amoebic trophozoites. Immunohistochemistry of the brain was positive for N. fowleri. The disease should be included among the differential diagnosis of diseases of the central nervous system in cattle in areas where animals are exposed to hot, stagnant water.
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Affiliation(s)
- Luciano A Pimentel
- Veterinary Hospital, Federal University of Campina Grande, Patos, Paraíba, Brazil
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Bailey C, Mansfield K. Emerging and reemerging infectious diseases of nonhuman primates in the laboratory setting. Vet Pathol 2010; 47:462-81. [PMID: 20472806 DOI: 10.1177/0300985810363719] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Despite numerous advances in the diagnosis and control of infectious diseases of nonhuman primates in the laboratory setting, a number of infectious agents continue to plague colonies. Some, such as measles virus and Mycobacterium tuberculosis, cause sporadic outbreaks despite well-established biosecurity protocols, whereas others, such as retroperitoneal fibromatosis-associated herpesvirus, have only recently been discovered, often as a result of immunosuppressive experimental manipulation. Owing to the unique social housing requirements of nonhuman primates, importation of foreign-bred animals, and lack of antemortem diagnostic assays for many new diseases, elimination of these agents is often difficult or impractical. Recognition of these diseases is therefore essential because of their confounding effects on experimental data, impact on colony health, and potential for zoonotic transmission. This review summarizes the relevant pathology and pathogenesis of emerging and reemerging infectious diseases of laboratory nonhuman primates.
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Affiliation(s)
- C Bailey
- New England Primate Research Center, Harvard Medical School, Southborough Campus, One Pine Hill Drive, Southborough, MA 01772, USA
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Sasseville VG, Mansfield KG. Overview of known non-human primate pathogens with potential to affect colonies used for toxicity testing. J Immunotoxicol 2010; 7:79-92. [PMID: 19909217 DOI: 10.3109/15476910903213521] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The increased demand for non-human primates (NHPs) in biomedical research has resulted in alternative sources of animals being used, which has allowed for importation of animals with varying background incidences of bacterial, viral, parasitic, and fungal pathogens. This can be of minimal consequence when animals from different sources are kept isolated. However, when NHPs from different sources with varying incidences of primary and opportunistic pathogens are mixed, there can be a rapid spread of these pathogens and an increase in the seroconversion of susceptible animals. If this process occurs during the conduct of a study, interpretation of that study can be confounded. Furthermore, NHPs imported from areas enzootic for pathogens such as Plasmodium or with high incidences of human diseases such as measles and tuberculosis can introduce diseases that can be a threat to colony health, have zoonotic risk, and can severely impact study outcome. Thus, knowledge of the common primary and opportunistic NHP infections, as well as reemerging pathogens, enables the toxicologist to use information on disease status for pre-study animal selection and intelligent study design. This is particularly important when immunomodulatory compounds are being investigated. Moreover, the toxicologic pathologist well versed in the common spontaneous infections, opportunistic pathogens, and background lesions in NHPs is able to assess possible drug-related effects in drug safety studies. This review identifies the common primary and opportunistic pathogens, as well as newly emerging infections of NHPs, that can directly or indirectly affect colony health and the interpretation of drug safety studies.
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Affiliation(s)
- Vito G Sasseville
- Bristol-Myers Squibb Research and Development, Discovery Toxicology, Princeton, NJ 08543, USA.
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Wachtman LM, Mansfield KG. Opportunistic Infections in Immunologically Compromised Nonhuman Primates. ILAR J 2008; 49:191-208. [DOI: 10.1093/ilar.49.2.191] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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