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Pereira DIB, Botton SA, Ianiski LB, Braga CQ, Maciel AF, Melo LG, Zambrano CG, Bruhn FRP, Santurio JM. Equidae pythiosis in Brazil and the world: a systematic review of the last 63 years (1960-2023). Braz J Microbiol 2024; 55:2969-2981. [PMID: 38967702 PMCID: PMC11405592 DOI: 10.1007/s42770-024-01435-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 06/24/2024] [Indexed: 07/06/2024] Open
Abstract
This systematic review compiles reports of clinical pythiosis in horses, mules and donkeys from 1960 to 2023 worldwide, focusing on Brazil. We searched databases and included 71 articles detailing clinical characteristics, geographic distribution, epidemiology, diagnostic methods, therapies, and outcomes. The results showed that publications on equine pythiosis have significantly increased since 2010. Brazil reported the highest incidence, comprising 55% of cases, predominantly in the southern, northeastern, and central-western regions during summer and autumn. Cutaneous pythiosis was the most prevalent form, generally presenting as single lesions in the appendicular region, and affected females more than males. Diagnosis typically involved histopathology, used alone or with other methods. Various treatments have been employed, with surgery, often combined with chemotherapy and immunotherapy, being the most common. Notably, 80.84% of treated animals recovered, highlighting the effectiveness of these therapies in enhancing survival rates. The limitations of the study included the lack of data in published case reports, which made it difficult to collect and calculate epidemiological data. Additionally, we recognize that pythiosis in Brazil is underreported, since this disease does not have mandatory notification and several cases are not registered and/or reported in the literature. Lastly, it is hypothesized that equid pythiosis may be more widespread than currently known, and its real occurrence in Brazil remains uncertain.
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Affiliation(s)
- Daniela Isabel Brayer Pereira
- Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Laboratório de Micologia, Programa de Pós Graduação em Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, Brazil.
| | - Sônia Avila Botton
- Centro de Ciências da Saúde, Departamento de Microbiologia e Parasitologia, Laboratório de Pesquisas Micológicas, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - Lara Baccarin Ianiski
- Centro de Ciências da Saúde, Departamento de Microbiologia e Parasitologia, Laboratório de Pesquisas Micológicas, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - Caroline Quintana Braga
- Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Laboratório de Micologia, Programa de Pós Graduação em Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Aline Fontanella Maciel
- Centro de Ciências da Saúde, Departamento de Microbiologia e Parasitologia, Laboratório de Pesquisas Micológicas, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | - Luíze Garcia Melo
- Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Laboratório de Micologia, Programa de Pós Graduação em Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Cristina Gomes Zambrano
- Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Laboratório de Micologia, Programa de Pós Graduação em Microbiologia e Parasitologia, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Fábio Raphael Pascoti Bruhn
- Faculdade de Veterinária, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Pelotas, Programa de Pós-Graduação em Medicina Veterinária, Pelotas, RS, Brazil
| | - Janio Morais Santurio
- Centro de Ciências da Saúde, Departamento de Microbiologia e Parasitologia, Laboratório de Pesquisas Micológicas, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
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Souto E, Kommers G, Souza A, Neto EGM, Assis D, Riet-Correa F, Galiza G, Dantas A. A Retrospective Study of Pythiosis in Domestic Animals in Northeastern Brazil. J Comp Pathol 2022; 195:34-50. [DOI: 10.1016/j.jcpa.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/18/2022] [Accepted: 05/25/2022] [Indexed: 11/27/2022]
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Yolanda H, Krajaejun T. Global Distribution and Clinical Features of Pythiosis in Humans and Animals. J Fungi (Basel) 2022; 8:jof8020182. [PMID: 35205934 PMCID: PMC8879638 DOI: 10.3390/jof8020182] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/06/2022] [Accepted: 02/08/2022] [Indexed: 01/27/2023] Open
Abstract
Pythiosis is a difficult-to-treat infectious disease caused by Pythium insidiosum. The condition is unfamiliar among healthcare workers. Manifestation of pythiosis is similar to other fungal infections, leading to misdiagnosis and delayed treatment. The geographical extent of pythiosis at a global scale is unclear. This study aimed to analyze the clinical information recorded in the scientific literature to comprehensively project epidemiological characteristics, clinical features, and future trends of pythiosis. From 1980 to 2021, 4203 cases of pythiosis in humans (n = 771; 18.3%) and animals (primarily horse, dog, and cow; n = 3432; 81.7%), with an average of 103 cases/year, were recruited. Pythiosis case reports significantly increased in the last decade. Pythiosis spanned 23 tropical, subtropical, and temperate countries worldwide. Some patients acquired pythiosis from a trip to an endemic country. Strikingly, 94.3% of human cases were in India and Thailand, while 79.2% of affected animals were in the U.S.A. and Brazil. Clinical features of pythiosis varied. Vascular and ocular pythiosis were only observed in humans, whereas cutaneous/subcutaneous and gastrointestinal infections were predominant in animals. Mortality depended on host species and clinical forms: for example, none in patients with ocular pythiosis, 0.7% in cows with a cutaneous lesion, 26.8% in humans with vascular disease, 86.4% in dogs with gastrointestinal pathology, and 100% in several animals with disseminated infection. In summary, this study reports up-to-date epidemiological and clinical features of pythiosis in humans and animals. It increases awareness of this life-threatening disease, as the illness or outbreak can exist in any country, not limited to the endemic areas.
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Affiliation(s)
- Hanna Yolanda
- Program in Translational Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand;
- Department of Parasitology, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Jakarta 14440, Indonesia
| | - Theerapong Krajaejun
- Department of Pathology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
- Correspondence: ; Tel.: +662-201-1452
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Souto EPF, Maia LA, Neto EGM, Kommers GD, Junior FG, Riet-Correa F, Galiza GJN, Dantas AFM. Pythiosis in Equidae in Northeastern Brazil: 1985-2020. J Equine Vet Sci 2021; 105:103726. [PMID: 34607686 DOI: 10.1016/j.jevs.2021.103726] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/01/2021] [Accepted: 08/02/2021] [Indexed: 10/20/2022]
Abstract
The epidemiologic, clinical, pathologic, microbiological and immunohistochemical findings of pythiosis in equidae in northeastern Brazil are described. From January 1985 to December 2020 the Laboratory of Animal Pathology of the Federal University of Campina Grande received 1,331 tissue samples of equidae, 202 (15.17%) of which were diagnosed as pythiosis. Equidae of both sexes with ages varying from 4 months to 25 years were affected. Most animals were mixed breed (79.7%) and reared in an extensive system (73.26%). The disease occurred throughout the year but the highest incidence (70.29%) was noted after the rainy season. The clinical course was always chronic. The lesions were preferentially located on the limbs and ventral thoracoabdominal wall and characterized by nodules or tumor-like masses with ulcerations and serosanguineous discharge. The cut surface showed fistulous tracts containing kunkers. The direct examination of the kunkers and microbiological culture revealed sparsely septate and branched hyaline hyphae. Histopathology revealed a marked inflammatory infiltrate of eosinophils with multifocal well-defined areas of eosinophil necrosis and collagenolysis and intralesional negatively-stained hyphal profiles; in the donkey, a pyogranulomatous inflammatory infiltrate was noted surrounding these areas. Immunohistochemistry for Pythium insidiosum revealed strong immunolabelling of the hyphae. Pythiosis occurs endemically in equidae in northeastern Brazil, with seasonal variation in the incidence. The intralesional kunkers establishes an accurate presumptive diagnosis, but confirmation should preferably be performed through histopathology associated with immunohistochemistry, culture-based or molecular methods.
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Affiliation(s)
- Erick Platiní F Souto
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil.
| | - Lisanka A Maia
- Laboratory of Animal Pathology, Federal Institute of Paraiba, Sousa, Paraiba, Brazil
| | - Eldine G Miranda Neto
- Large Animal Medical Clinic, Federal University of Campina Grande, Patos, Paraíba, Brazil
| | - Glaucia D Kommers
- Pathology Department, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Felício Garino Junior
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Franklin Riet-Correa
- Post-Graduate Program in Animal Science in the Tropics, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Glauco J N Galiza
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
| | - Antonio F M Dantas
- Laboratory of Animal Pathology, Federal University of Campina Grande, Patos, Paraiba, Brazil
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Souto E, Pessoa C, Pessoa A, Trost M, Kommers G, Correa F, Dantas A. Esophageal pythiosis in an ostrich (Struthio camelus). ARQ BRAS MED VET ZOO 2019. [DOI: 10.1590/1678-4162-10666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
| | | | | | - M.E. Trost
- Universidade Federal de Santa Maria, Brazil
| | | | - F.R. Correa
- National Institute of Agricultural Research, Uruguay
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Mycobacterium branderi Infection in a Horse with Granulomatous Mesenteric Lymphadenitis. J Comp Pathol 2019; 168:30-34. [PMID: 31103056 DOI: 10.1016/j.jcpa.2019.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/07/2019] [Accepted: 03/09/2019] [Indexed: 11/23/2022]
Abstract
Although relatively uncommon in horses, infections caused by Mycobacterium spp. may affect the gastrointestinal tract. Mycobacterium branderi is a non-tuberculous Mycobacterium (NTM) that causes respiratory infections in man. Non-tuberculous mycobacteria may also affect horses; however, infection by M. branderi has not yet been reported in this species. This report describes the clinical, pathological, microbiological and molecular findings of M. branderi infection in a horse, causing granulomatous mesenteric lymphadenitis. A 17-year-old Thoroughbred stallion had a 3-month history of chronic diarrhoea, cachexia and ventral and cervical oedema. Necropsy examination revealed severe mesenteric lymphadenomegaly, together with mesenteric lymphangiectasia and diffuse small intestinal mucosal thickening. Microscopically, the mesenteric lymph node had diffuse granulomatous inflammatory infiltration, replacing most of the nodal parenchyma, with multiple acid-fast bacilli within the cytoplasm of macrophages. There was also diffuse lymphangiectasia. Fresh samples of mesenteric lymph nodes yielded no bacterial growth; however, nested polymerase chain reaction products obtained from the mesenteric lymph node samples were consistent with M. branderi. This infection should be included as a differential diagnosis in cases of chronic diarrhoea in horses, especially when granulomatous enteritis and lymphadenitis are also observed.
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Rossato C, Fiss L, Sperotto V, Cardona R, Silva R. Pythiosis with atypical location in the soft palate in a horse in Southern Brazil. ARQ BRAS MED VET ZOO 2018. [DOI: 10.1590/1678-4162-9568] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
| | - L. Fiss
- Universidade de Cruz Alta, Brazil
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Firmino M, Frade M, Alves R, Maia L, Olinda R, Ximenes R, Souza A, Dantas A. Intestinal intussusception secondary to enteritis caused by Pythium insidiosum in a bitch: case report. ARQ BRAS MED VET ZOO 2017. [DOI: 10.1590/1678-4162-9107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT We report a case of intestinal intussusception secondary to enteritis caused by Pythium insidiosum infection in a 1-year-old mixed breed bitch that died after a 30-day history of bloody diarrhea, anorexia, weight loss, listlessness, dehydration, and pale mucous membranes. Necropsy revealed two areas of intussusception, one jejunum-jejunal and one ileum-cecum-colic. The first intussusception showed slight congestion of the intestinal loop, which was resolved by manual traction, while the second intussusception exhibited thickening, irregular yellow spots, and transmural congestion. Histologically, the jejunum-jejunal segment had ischemic lesions secondary and ileum-cecum-colic intussusception there was also necrotizing, pyogranulomatous enteritis associated with negative images of intralesional fungal hyphae that were well visualized by silver impregnation. Immunohistochemistry identified the hyphae as Pythium insidiosum. The diagnosis was made based on the histological changes and confirmed by immunohistochemistry. We can conclude that enteritis by P. insidiosum in dogs can occasionally cause intestinal intussusception and result in acute death.
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Affiliation(s)
| | | | - R.C. Alves
- Universidade Federal de Campina Grande, Brazil
| | - L.Â. Maia
- Universidade Federal de Campina Grande, Brazil
| | - R.G. Olinda
- Universidade Federal de Campina Grande, Brazil
| | | | - A.P. Souza
- Universidade Federal de Campina Grande, Brazil
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Cafarchia C, Figueredo LA, Otranto D. Fungal diseases of horses. Vet Microbiol 2013; 167:215-34. [PMID: 23428378 DOI: 10.1016/j.vetmic.2013.01.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 01/13/2013] [Accepted: 01/17/2013] [Indexed: 10/27/2022]
Abstract
Among diseases of horses caused by fungi (=mycoses), dermatophytosis, cryptococcosis and aspergillosis are of particular concern, due their worldwide diffusion and, for some of them, zoonotic potential. Conversely, other mycoses such as subcutaneous (i.e., pythiosis and mycetoma) or deep mycoses (i.e., blastomycosis and coccidioidomycosis) are rare, and/or limited to restricted geographical areas. Generally, subcutaneous and deep mycoses are chronic and progressive diseases; clinical signs include extensive, painful lesions (not pathognomonic), which resemble to other microbial infections. In all cases, early diagnosis is crucial in order to achieve a favorable prognosis. Knowledge of the epidemiology, clinical signs, and diagnosis of fungal diseases is essential for the establishment of effective therapeutic strategies. This article reviews the clinical manifestations, diagnosis and therapeutic protocols of equine fungal infections as a support to early diagnosis and application of targeted therapeutic and control strategies.
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Affiliation(s)
- Claudia Cafarchia
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Str. prov.le per Casamassima Km 3, 70010 Valenzano, Bari, Italy.
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