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The link between neurology and behavior in veterinary medicine: A review. J Vet Behav 2021. [DOI: 10.1016/j.jveb.2021.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Samarasekara J, Mukherjee S, Ismail A, Corns R. Cerebral protothecosis mimicking high-grade glioma. BMJ Case Rep 2021; 14:14/1/e235362. [PMID: 33500294 PMCID: PMC7839890 DOI: 10.1136/bcr-2020-235362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Prototheca wickerhamii is a common, indolent alga that seldom causes central nervous system infections in humans. We report the first UK case of cerebral protothecosis in an immunocompetent 56-year-old woman who presented with a 5-month history of intermittent fatigue followed by a 2-week history of symptoms, including right arm and leg weakness, a loss of fine motor coordination, worsening gait, right facial tingling, diplopia and a metallic oral taste. MRI scans revealed a multifocal abnormality suggestive of high-grade glioma. Given the clinical presentation, absence of immunodeficiency and characteristic MRI features, a diagnosis of high-grade glioma was deemed most likely by the multidisciplinary team. Surgical biopsy provided material for histopathological and microbiological diagnosis. She underwent a 2-year course of antimicrobials with surveillance MRI scans. The patient made a good functional recovery but still retains mild neurological sequelae.
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Affiliation(s)
| | | | - Azzam Ismail
- Department of Pathology, Leeds Teaching Hospitals, Leeds, UK
| | - Robert Corns
- Department of Neurosurgery, Leeds General Infirmary, Leeds, UK
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Masuda M, Jagielski T, Danesi P, Falcaro C, Bertola M, Krockenberger M, Malik R, Kano R. Protothecosis in Dogs and Cats-New Research Directions. Mycopathologia 2020; 186:143-152. [PMID: 33206310 DOI: 10.1007/s11046-020-00508-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 11/02/2020] [Indexed: 11/25/2022]
Abstract
Protothecosis refers to disease of humans and animals caused by infection with fungus-like, colourless microalgae of the genus Prototheca. Although protothecosis remains an uncommon infection, increasing numbers of human and animal cases are being diagnosed worldwide. This review summarises major new findings in basic science (sequencing analyses of sterol 14α-demethylase (CYP51/ERG11) genes and organelle genomes of Prototheca wickerhamii) to elucidate taxonomic features of this pathogen. Furthermore, this review updates and summarises the clinical features, diagnosis and treatment of protothecosis in dogs and cats. This content of this review is based on information presented at the medical phycology symposium held in the 20th Congress of the International Society for Human and Animal Mycology ( https://www.isham.org/ ).
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Affiliation(s)
- Michiaki Masuda
- Department of Microbiology, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Tomasz Jagielski
- Department of Medical Microbiology, Institute of Microbiology, University of Warsaw, Warsaw, Poland
| | - Patrizia Danesi
- Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, PD, Italy
| | - Christian Falcaro
- Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, PD, Italy
| | - Michela Bertola
- Istituto Zooprofilattico Sperimentale Delle Venezie, Legnaro, PD, Italy
| | - Mark Krockenberger
- Veterinary Pathology Diagnostic Services (VPDS), Sydney School of Veterinary Science, The University of Sydney, B14, Sydney, NSW, Australia
| | - Richard Malik
- Centre for Veterinary Education, The University of Sydney, B22, Sydney, NSW, 2006, Australia
| | - Rui Kano
- Department of Veterinary Dermatology, Nihon University School of Veterinary Medicine, 1866, Kameino, Fujisawa, Kanagawa, 252-0880, Japan.
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Cocchetto A, Briola C, Furlanello T, Danesi P, Cirla A, Menchetti M. 3‐T MRI of protothecosis encephalic lesions in a Scottish shepherd dog. VETERINARY RECORD CASE REPORTS 2020. [DOI: 10.1136/vetreccr-2020-001145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Aurora Cocchetto
- Neurology and Neurosurgery DivisionSan Marco Veterinary ClinicVeggiano (Padova)Italy
| | - Chiara Briola
- Cambridge UniversityCambridgeUK
- Diagnostic and Interventional Radiology DivisionSan Marco Veterinary ClinicVeggiano (Padova)Italy
| | | | - Patrizia Danesi
- Istituto Zooprofilattico Sperimentale delle Venezie (IZSVE)LegnaroItaly
| | - Alessandro Cirla
- Ophtalmology DivisionSan Marco Veterinary ClinicVeggiano (Padova)Italy
| | - Marika Menchetti
- Neurology and Neurosurgery DivisionSan Marco Veterinary ClinicVeggiano (Padova)Italy
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Parratt CA, Firth AM, Boag AK, Allison GF, Boysen SR. Retrospective characterization of coma and stupor in dogs and cats presenting to a multicenter out-of-hours service (2012-2015): 386 animals. J Vet Emerg Crit Care (San Antonio) 2018; 28:559-565. [PMID: 30325574 DOI: 10.1111/vec.12772] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 09/03/2017] [Accepted: 11/01/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To describe the signalment, etiology, and short-term outcome of dogs and cats presenting in a coma or stupor. DESIGN Retrospective study conducted between May 2012 and February 2015. SETTING Multicenter out-of-hours emergency service provider. ANIMALS Three hundred eighty-six patients presenting in a coma or stupor to a multicenter out-of-hours emergency care provider. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Records were reviewed to determine the most likely etiology of coma or stupor. Short-term outcomes were defined as deceased (died or euthanized) or transferred (case handed over to a daytime clinic or discharged). There were 168 dogs (coma n = 112, stupor n = 56) and 218 cats (coma n = 148, stupor n = 70) identified. Coma and stupor were more prevalent in cats compared to dogs, and Chihuahuas were over represented. Blood glucose concentrations were frequently outside established reference intervals. Excluding undetermined causes, the most common causes in dogs included traumatic brain injury (TBI) 16.0% (n = 27, deceased n = 22), hypoglycemia 10.7% (n = 18, deceased n = 8), shock 10.1% (n = 17, deceased n = 16), seizure 9.5% (n = 16, deceased n = 13), and renal or hepatic dysfunction 5.3% (n = 9, deceased n = 7). For cats, the most common causes included TBI 21.6% (n = 47, deceased n = 38), renal or hepatic dysfunction 13.3% (n = 29, deceased n = 25), intoxication 10.1% (n = 22, deceased n = 18), hypoglycemia 6.0% (n = 13, deceased n = 4), and shock 5.0% (n = 11, deceased n = 8). When treatment was attempted, 46.0% of dogs (n = 44/96) and 41.2% of cats (n = 35/85) survived to be transferred. Compared to all other etiologies, death was less likely when coma or stupor was attributed to hypoglycemia. CONCLUSION In cases where a cause was determined, TBI was the predominant etiology of coma and stupor for both species. With the exception of coma and stupor attributed to hypoglycemia, the overall short-term prognosis was poor.
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Affiliation(s)
| | | | | | | | - Søren R Boysen
- Department of Veterinary Clinical and Diagnostic Sciences, Faculty of Veterinary Medicine, University of Calgary, Calgary, Canada
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Cutaneous Disease as Sole Clinical Manifestation of Protothecosis in a Boxer Dog. Case Rep Vet Med 2016; 2016:2878751. [PMID: 29955414 PMCID: PMC6005278 DOI: 10.1155/2016/2878751] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Revised: 01/31/2016] [Accepted: 02/02/2016] [Indexed: 11/17/2022] Open
Abstract
Prototheca wickerhamii is ubiquitous, saprophytic achlorophyllous algae that cause opportunistic infections in the dog and cat and disseminated disease usually in immunocompromised animals. In this report an uncommon case of canine cutaneous protothecosis is presented. A 6-year-old female boxer was brought in with skin lesions that consisted of nodules and generalized footpad hyperkeratosis, depigmentation, and erosion. Cytology and histopathology showed pyogranulomatous inflammation along with organisms containing round sporangia with spherical sporangiospores. PCR and sequencing identified the causal organism as Prototheca wickerhamii. Therapy applied in this patient with either fluconazole alone or combination of amphotericin B and itraconazole proved effective only for footpad lesions but not for skin nodules. Systemic therapy seems to be ineffective for skin nodules, at least in chronic cases of canine cutaneous protothecosis. Although canine protothecosis usually presents with the disseminated form, cutaneous disease as sole clinical manifestation of the infection may also be witnessed.
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Manino PM, Oliveira F, Ficken M, Swinford A, Burney D. Disseminated Protothecosis Associated With Diskospondylitis in a Dog. J Am Anim Hosp Assoc 2014; 50:429-35. [DOI: 10.5326/jaaha-ms-6083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A 6 yr old female Labrador retriever was evaluated for an acute onset of difficulty walking and a head tilt. Initial physical examination revealed bilateral retinal detachment, a left-sided head tilt, positional rotary nystagmus, and lumbar hyperpathia. Pertinent preliminary diagnostic findings included systemic hypertension, bony lysis and adjacent sclerosis of the vertebral endplates of the first and second lumbar vertebrae, and positive urine and blood cultures for a yeast identified as Candida spp. Concerned about disseminated candidiasis after subsequent subretinal aspirates confirmed the presence of a yeast-like organism, therapy with voriconazole was initiated. Because of progressive clinical deterioration and the poor prognosis for recovery, the dog was eventually euthanized. Postmortem histological examination of tissues, including the affected vertebral endplates, revealed numerous intralesional algae compatible with Prototheca spp. To the authors' knowledge, this report is the first to document a case of protothecal diskospondylitis with possible concurrent candidiasis in a dog. Although typically associated with signs referable to the gastrointestinal tract, this report underscores the importance of not excluding protothecosis as a differential diagnosis when such signs are absent. Lastly, the use of voriconazole appears ineffective for reversing the clinical course of late-stage disseminated protothecosis.
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Affiliation(s)
- Paul M. Manino
- Texas Gulf Coast Veterinary Specialists, Houston, TX (P.M.); Texas Veterinary Medical Diagnostic Laboratory, College Station, TX (F.O., M.F., A.S.); and Veterinary Specialist of North Texas, Dallas, TX (D.B.)
| | - Fabiano Oliveira
- Texas Gulf Coast Veterinary Specialists, Houston, TX (P.M.); Texas Veterinary Medical Diagnostic Laboratory, College Station, TX (F.O., M.F., A.S.); and Veterinary Specialist of North Texas, Dallas, TX (D.B.)
| | - Martin Ficken
- Texas Gulf Coast Veterinary Specialists, Houston, TX (P.M.); Texas Veterinary Medical Diagnostic Laboratory, College Station, TX (F.O., M.F., A.S.); and Veterinary Specialist of North Texas, Dallas, TX (D.B.)
| | - Amy Swinford
- Texas Gulf Coast Veterinary Specialists, Houston, TX (P.M.); Texas Veterinary Medical Diagnostic Laboratory, College Station, TX (F.O., M.F., A.S.); and Veterinary Specialist of North Texas, Dallas, TX (D.B.)
| | - Derek Burney
- Texas Gulf Coast Veterinary Specialists, Houston, TX (P.M.); Texas Veterinary Medical Diagnostic Laboratory, College Station, TX (F.O., M.F., A.S.); and Veterinary Specialist of North Texas, Dallas, TX (D.B.)
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Beribè F, Miglio A, Cassarani MP, Magi G, Passamonti F, Laus F, Cerquetella M, Spaterna A. What is your diagnosis? Systemic lymphadenopathy and blindness in a dog from Italy. Vet Clin Pathol 2014; 43:605-6. [DOI: 10.1111/vcp.12189] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Francesca Beribè
- School of Veterinary Medical Science; University of Camerino; Camerino Italy
| | - Arianna Miglio
- Department of Veterinary Medicine; University of Perugia; Perugia Italy
| | | | - Gianenrico Magi
- School of Veterinary Medical Science; University of Camerino; Camerino Italy
| | | | - Fulvio Laus
- School of Veterinary Medical Science; University of Camerino; Camerino Italy
| | - Matteo Cerquetella
- School of Veterinary Medical Science; University of Camerino; Camerino Italy
| | - Andrea Spaterna
- School of Veterinary Medical Science; University of Camerino; Camerino Italy
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Font C, Mascort J, Márquez M, Esteban C, Sánchez D, Durall N, Pumarola M, Luján A. Paraparesis as initial manifestation of a Prototheca zopfii infection in a dog. J Small Anim Pract 2014; 55:283-6. [PMID: 24502403 DOI: 10.1111/jsap.12188] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A case of protothecosis causing non-ambulatory paraparesis in a dog without clinical evidence of disseminated infection is described. A five-year-old female Labrador retriever was referred with a 10-day history of progressive non-ambulatory paraparesis and lumbar pain as the only physical and neurological abnormalities. Lumbar myelography revealed severe extradural spinal cord compression extending from L4 to L7 vertebrae, and a right hemilaminectomy was performed. Surgical findings included an adherent whitish hard ill-defined mass. Cytology and biopsy results disclosed the presence of algae enclosed in a matrix of chronic inflammatory infiltrate. Culture confirmed the presence of Prototheca species. Neurological improvement occurred within a month, and the dog received antifungal treatment without evidence of clinical disseminated disease for 6 months, but died after a generalised tonic-clonic seizure. Post-mortem examination revealed multiple foci of inflammatory granulomatous infiltrate and algae-like structures in the brain, lumbar intumescence and cauda equina. Prototheca zopfii was identified using molecular biology methods.
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Affiliation(s)
- C Font
- Hospital ARS Veterinaria, Cardedeu 3, 08023, Barcelona, Spain
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Abstract
A 6-year-old Boxer was examined because of progressive neurologic signs, with severe hindlimb ataxia and head tilt on presentation. There was no history of diarrhea or vomiting. MRI of the brain revealed multifocal ill-defined T1-enhancing lesions affecting the cerebrum, brainstem, and cervical meninges, without associated mass effect. Meningoencephalitis was considered the most likely diagnosis. Multiple algae were observed on the cytology of the CSF and were most consistent withProtothecaspp. Antiprotozoal treatment was denied by the owners, and 5 weeks after diagnosis, the dog was euthanized due to progression of the neurologic deficits, and a necropsy was performed. Histological changes in the brain were compatible with severe multifocal protothecal meningoencephalitis. The specificProtothecaspecies was not identified. The gastrointestinal tract was unremarkable on histology. According to this report,Protothecaspp. should be included in the differentials for neurological deficits even in the absence of gastrointestinal signs.
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Márquez M, Ródenas S, Molin J, Rabanal RM, Fondevila D, Añor S, Pumarola M. Protothecal pyogranulomatous meningoencephalitis in a dog without evidence of disseminated infection. Vet Rec 2012; 171:100. [DOI: 10.1136/vr.100661] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- M. Márquez
- Banc de Teixits Animals de Catalunya (BTAC); Universitat Autònoma de Barcelona; 08193 Bellaterra (Cerdanyola del Vallès) Barcelona Spain
| | - S. Ródenas
- Banc de Teixits Animals de Catalunya (BTAC); Universitat Autònoma de Barcelona; 08193 Bellaterra (Cerdanyola del Vallès) Barcelona Spain
| | - J. Molin
- Departament de Medicina i Cirurgia Animals; Facultat de Veterinària; Universitat Autònoma de Barcelona; 08193 Bellaterra (Cerdanyola del Vallès) Barcelona Spain
| | - R. M. Rabanal
- Centre de Biotecnologia Animal i Teràpia (CBATEG); Universitat Autònoma de Barcelona; 08193 Bellaterra (Cerdanyola del Vallès) Barcelona Spain
| | - D. Fondevila
- Centre de Biotecnologia Animal i Teràpia (CBATEG); Universitat Autònoma de Barcelona; 08193 Bellaterra (Cerdanyola del Vallès) Barcelona Spain
| | - S. Añor
- Banc de Teixits Animals de Catalunya (BTAC); Universitat Autònoma de Barcelona; 08193 Bellaterra (Cerdanyola del Vallès) Barcelona Spain
| | - M. Pumarola
- Banc de Teixits Animals de Catalunya (BTAC); Universitat Autònoma de Barcelona; 08193 Bellaterra (Cerdanyola del Vallès) Barcelona Spain
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Lane LV, Meinkoth JH, Brunker J, Smith SK, Snider TA, Thomas J, Bradway D, Love BC. Disseminated protothecosis diagnosed by evaluation of CSF in a dog. Vet Clin Pathol 2012; 41:147-52. [PMID: 22251039 DOI: 10.1111/j.1939-165x.2011.00395.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 5-year-old female spayed Shetland Sheepdog Mix dog was evaluated for a history of recent seizure activity, progressive hind limb ataxia, polyuria, and polydipsia and no history of gastrointestinal signs. Physical examination findings included conscious proprioceptive deficits, ataxia, and anterior uveitis along with a hypermature cataract in the right eye. Results of a CBC, serum biochemical profile, urinalysis, and computed tomography scan of the brain were unremarkable. Cerebrospinal fluid (CSF) analysis revealed marked eosinophilic pleocytosis and rare organisms consistent with Prototheca spp within neutrophils and macrophages. On postmortem histologic examination, mononuclear inflammation and numerous intralesional algal organisms, similar to those seen on the cytologic preparation of CSF, were found in the brain, eyes, kidneys, and heart. Abnormalities were not detected on gross and histologic examination of the gastrointestinal tract. Cultures of CSF and subdural/olfactory bulb, but not intestinal tract, yielded growth of Prototheca spp, and PCR analysis and DNA sequencing confirmed the organism as Prototheca zopfii genotype 2. We have reported a rare case of disseminated protothecosis that was diagnosed by evaluation of CSF in a dog presented with neurologic signs and no overt enteric disease. Protothecosis should be considered as a rare cause of seizures, even in the absence of obvious enteric signs, and should be included in the differential diagnosis of eosinophilic pleocytosis.
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Affiliation(s)
- Laura V Lane
- Department of Veterinary Pathobiology, Center for Veterinary Health Sciences, Oklahoma State University, 250 McElroy Hall, Stillwater, OK 74078, USA.
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Armour MD, Broome M, Dell’Anna G, Blades NJ, Esson DW. A review of orbital and intracranial magnetic resonance imaging in 79 canine and 13 feline patients (2004-2010). Vet Ophthalmol 2011; 14:215-26. [DOI: 10.1111/j.1463-5224.2010.00865.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Camboim EK, Neves PB, Garino Júnior F, Medeiros JM, Riet-Correa F. Prototecose: uma doença emergente. PESQUISA VETERINARIA BRASILEIRA 2010. [DOI: 10.1590/s0100-736x2010000100015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Prototecose, causada por Prototheca zopfii ou P. wickerhamii, é uma doença emergente em animais e humanos. Em bovinos, P. zopfii é uma importante causa de mastite ambiental. Em cães e gatos, a prototecose é causada principalmente por P. zopfii. Em cães, causa infecção cutânea ou uma forma sistêmica envolvendo diversos órgãos. Em gatos, predominam as lesões tegumentares na região da face e plano nasal. No homem, a prototecose, causada principalmente por P. wickerhamii, manifesta-se sob três formas: cutânea, articular com bursite do olécrano e sistêmica. Pode ocorrer em indivíduos imunocompetentes, os quais podem apresentar bursite e/ou infecções cutâneas localizadas, ou em indivíduos imunossuprimidos, nos quais a enfermidade pode ser disseminada e/ou com envolvimento visceral. A prototecose causada por P. wickerhamii foi descrita recentemente em caprinos como causa de rinite afetando o vestíbulo nasal, união mucocutânea, pele da face e orelha. Nesta revisão são abordadas as características microbiologias e susceptibilidade a antimicrobianos do agente, e a epidemiologia, sinais clínicos, patologia, diagnóstico, tratamento e controle da prototecose em animais domésticos e no homem.
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Microbicidal Action of Indole-3-Acetic Acid Combined with Horseradish Peroxidase on Prototheca zopfii from Bovine Mastitis. Mycopathologia 2009; 169:99-105. [DOI: 10.1007/s11046-009-9234-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Accepted: 08/14/2009] [Indexed: 10/20/2022]
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