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Glushakova A, Kachalkin A. Wild and partially synanthropic bird yeast diversity, in vitro virulence, and antifungal susceptibility of Candida parapsilosis and Candida tropicalis strains isolated from feces. Int Microbiol 2024; 27:883-897. [PMID: 37874524 DOI: 10.1007/s10123-023-00437-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/20/2023] [Accepted: 10/16/2023] [Indexed: 10/25/2023]
Abstract
Yeast complexes in the fecal samples of wild (Dendrocopos major, Picus viridis) and partially synanthropic (Bombycilla garrulus, Garrulus glandarius, Pica pica, and Pyrrhula pyrrhula) birds were studied in a forest ecosystem during winter. A total of 18 yeast species were identified: 16 ascomycetes and two basidiomycetes belonging to five subphyla of fungi: Saccharomycotina (15), Pezizomycotina (1), Agaricomycotina (1), and Pucciniomycotina (1). Most yeast species were found in the fecal samples of P. pyrrhula (Candida parapsilosis, C. zeylanoides, Debaryomyces hansenii, Hanseniaspora uvarum, Metschnikowia pulcherrima, Meyerozyma carpophila, M. guilliermondii, Rhodotorula mucilaginosa); the lowest number of yeast species was observed in the feces of B. garrulus (C. parapsilosis, C. zeylanoides, Met. pulcherrima, and Rh. mucilaginosa). The opportunistic species of the genus Candida were found only in feces of partially synanthropic birds: C. parapsilosis was observed in the feces of B. garrulus, G. glandarius, P. pica, and P. pyrrhula; its relative abundance was 69.3%, 49.1%, 10.5%, and 1.1%, respectively; C. tropicalis was observed in the feces of P. pica and G. glandarius; its relative abundance was 54.6% and 7.1%, respectively. Strains of C. parapsilosis and C. tropicalis isolated from the feces of partially synanthropic birds were evaluated for their susceptibility to conventional antifungal agents (fluconazole, voriconazole, amphotericin B) and hydrolytic activity. A total of 160 strains were studied. Resistance to fluconazole was detected in 86.8% of C. parapsilosis strains and in 87% of C. tropicalis strains; resistance to voriconazole was detected in 71.7% of C. parapsilosis and in 66.7% of C. tropicalis strains, and the lowest percentage of resistant strains was detected to amphotericin B, 2.8% and 3.7% in C. parapsilosis and C. tropicalis strains, respectively. Multiresistance was detected in one strain of C. parapsilosis isolated from P. pica feces and in one strain of C. tropicalis isolated from G. glandarius feces. Phospholipase and hemolysin activities in the strains of C. parapsilosis were low (mean Pz values of 0.93 and 0.91, respectively); protease activity was moderate (mean Pz value of 0.53). The ability to produce hydrolytic enzymes was higher in the isolated strains of C. tropicalis. The mean Pz values of phospholipase and hemolysin activities were moderate (mean Pz values of 0.63 and 0.60, respectively), whereas protease activity was high (mean Pz value of 0.32). Thus, wild and partially synanthropic birds play an important role in disseminating of various yeast species. These yeasts can enter the topsoil via feces and contribute to the formation of allochthonous and uneven soil yeast diversity in natural ecosystems. In addition, partially synanthropic birds can be vectors of virulent strains of opportunistic Candida species from urban environments to natural biotopes.
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Affiliation(s)
- Anna Glushakova
- Soil Science Faculty, Lomonosov Moscow State University, 119991, Moscow, Russia.
- I.I. Mechnikov Research Institute of Vaccines and Sera, Moscow, 105064, Russia.
| | - Aleksey Kachalkin
- Soil Science Faculty, Lomonosov Moscow State University, 119991, Moscow, Russia
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of RAS, Pushchino, 142290, Russia
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Nualmalang R, Thanomsridetchai N, Teethaisong Y, Sukphopetch P, Tangwattanachuleeporn M. Identification of Pathogenic and Opportunistic Yeasts in Pigeon Excreta by MALDI-TOF Mass Spectrometry and Their Prevalence in Chon Buri Province, Thailand. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:3191. [PMID: 36833884 PMCID: PMC9967633 DOI: 10.3390/ijerph20043191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Pigeon excreta can cause environmental and public health issues, particularly in urban and public areas. They are reservoirs of several human pathogens including fungi, bacteria, and viruses. Epidemiological data of pathogenic and opportunistic yeasts in pigeon droppings in Chon Buri, one of the most reputable tourist cities of Thailand, are scarce. The present study aimed to identify yeasts in pigeon droppings by MALDI-TOF mass spectrometry, and to study their prevalence in Chon Buri, Thailand. A total of 200 pigeon fecal samples were collected randomly from all 11 districts of Chon Buri. A sum of 393 yeast-like colonies were isolated on Sabourand's dextrose agar and CHROMagar media. These isolates were further confirmed for their species by MALDI-TOF MS. Twenty-four yeast species belonging to 11 different genera were identified in pigeon fecal samples. Candida spp., predominantly C. krusei (14.32%), were the most prevalent yeast species. Other yeast species, including C. glabrata (12.73%), C. metapsilosis (11.93%), Lodderomyces elongisporus (10.87%), C. tropicalis (7.16%), C. albicans (5.83%), and Cryptococcus neoformans (4.77%) were identified. This study provides valuable epidemiological data and diversity of yeasts in pigeon droppings in Chon Buri, Thailand, and also supports the use of MALDI-TOF MS for yeast identification and epidemiological surveillance.
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Affiliation(s)
- Rungnapa Nualmalang
- Department of Medical Sciences, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand
| | - Natthapaninee Thanomsridetchai
- Department of Medical Technology, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand
| | - Yothin Teethaisong
- Department of Medical Sciences, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand
- Research Unit for Sensor Innovation (RUSI), Burapha University, Mueang, Chonburi 20131, Thailand
| | - Passanesh Sukphopetch
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Marut Tangwattanachuleeporn
- Department of Medical Sciences, Faculty of Allied Health Sciences, Burapha University, Mueang, Chonburi 20131, Thailand
- Research Unit for Sensor Innovation (RUSI), Burapha University, Mueang, Chonburi 20131, Thailand
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Talazadeh F, Ghorbanpoor M, Shahriyari A. Candidiasis in Birds (Galliformes, Anseriformes, Psittaciformes, Passeriformes, and Columbiformes): A Focus on Antifungal Susceptibility Pattern of Candida albicans and Non-albicans Isolates in Avian Clinical Specimens. Top Companion Anim Med 2021; 46:100598. [PMID: 34700027 DOI: 10.1016/j.tcam.2021.100598] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 10/17/2021] [Accepted: 10/21/2021] [Indexed: 11/18/2022]
Abstract
Candidiasis is a fungal infection caused by Candida species which has been reported in most domestic and wild birds and mammals. In this study, 196 samples from different species of birds with suspected symptoms of candidiasis were examined. Pharyngeal swabs, cloacal swabs, and fecal samples were taken from the birds. The samples were cultured in sabouraud dextrose agar (SDA) containing cycloheximide and chloramphenicol and incubated at 42°C. Suspected isolates of Candida were identified using PCR. To detect the candida genus, a primer set to target the candida rDNA (ITS1-ITS4) was selected. To detect Candida albicans (C albicans), a primer set to target cytochrome P-450 lanosterol-a-demethylase (P450-LIAl) gene (DH-1558) was selected. In direct microscopic observation and culture, 28.57% of the birds were suspected of candidiasis. In the molecular study, candidiasis was confirmed in 25% of the birds, and candidiasis caused by C albicans was confirmed in 14.28% of the birds. All isolates were subjected to antibiotic susceptibility by the disk diffusion method with glucose-enriched Mueller-Hinton Agar. 78.5% of the isolates were sensitive to nystatin and amphotericin B. None of the isolates were sensitive to itraconazole and more than 50% of the isolates were resistant to fluconazole, ketoconazole, and itraconazole. According to the results, it is suggested to use nystatin and amphotericin B in the treatment of avian candidiasis in the Ahvaz region. To the authors' knowledge, this is the first report of the molecular detection and antifungal susceptibility pattern of C albicans and non- albicans from Galliformes, Anseriformes, Psittaciformes, and Passeriformes in Iran.
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Affiliation(s)
- Forough Talazadeh
- Associate Professor, Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
| | - Masoud Ghorbanpoor
- Professor, Department of pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Abolfazl Shahriyari
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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Chrobak-Chmiel D, Kwiecień E, Golke A, Dolka B, Adamczyk K, Biegańska MJ, Spinu M, Binek M, Rzewuska M. Pigeons as Carriers of Clinically Relevant Multidrug-Resistant Pathogens-A Clinical Case Report and Literature Review. Front Vet Sci 2021; 8:664226. [PMID: 34109235 PMCID: PMC8180574 DOI: 10.3389/fvets.2021.664226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/09/2021] [Indexed: 11/13/2022] Open
Abstract
Pigeons are widespread bird species in urban regions (Columba livia forma urbana) and may carry pathogens with zoonotic potential. In recent years, more and more data indicate that these zoonotic pathogens are multidrug resistant. Our results confirmed that global trend. Three different multidrug-resistant pathogens were isolated from an oral cavity of a racing pigeon with lesions typical for pigeon pox virus infection. Staphylococcus aureus was recognized as methicillin resistant, thus resistant to all beta-lactams. Additionally, it was also resistant to many other classes of antibiotics, namely: aminoglycosides, tetracyclines, phenicols, lincosamides, and macrolides. Escherichia coli showed resistance to all antimicrobials tested, and it was classified as intermediate to amikacin. Moreover, Candida albicans resistant to clotrimazole, natamycin, flucytosine, and amphotericin and intermediate to ketoconazole, nystatin, and econazole was also isolated. This raises the question how pigeons acquire such highly resistant strains. Therefore, more data are needed concerning the resistance to antibiotics in strains from domestic and wild pigeons in Poland. Until the problem is fully understood, it will be challenging to implement adequate planning of any control measures and check their effectiveness.
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Affiliation(s)
- Dorota Chrobak-Chmiel
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Ewelina Kwiecień
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Anna Golke
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Beata Dolka
- Department of Pathology and Veterinary Diagnostics, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Krzysztof Adamczyk
- Department of Pathology and Veterinary Diagnostics, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Małgorzata J Biegańska
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Marina Spinu
- Department of Infectious Diseases and Preventive Medicine, Law and Ethics, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania
| | - Marian Binek
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
| | - Magdalena Rzewuska
- Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
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Almeida-Paes R, Figueiredo-Carvalho MH, da Silva LB, Gerfen G, S Araújo GRD, Frases S, Zancopé-Oliveira RM, Nosanchuk JD. Candida glabrata produces a melanin-like pigment that protects against stress conditions encountered during parasitism. Future Microbiol 2021; 16:509-520. [PMID: 33960816 DOI: 10.2217/fmb-2020-0228] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Melanin has been linked to pathogenesis in several fungi. They often produce melanin-like pigments in the presence of L-dihydroxyphenylalanine (L-DOPA), but this is poorly studied in Candida glabrata. Methods & materials: C. glabrata was grown in minimal medium with or without L-DOPA supplementation and submitted to a chemical treatment with denaturant and hot acid. Results: C. glabrata turned black when grown in the presence of L-DOPA, whereas cells grown without L-DOPA supplementation remained white. Biophysical properties demonstrated that the pigment was melanin. Melanized C. glabrata cells were effectively protected from azoles and amphotericin B, incubation at 42°C and macrophage killing. Conclusion: In the presence of L-DOPA, C. glabrata produces melanin, increases antifungal resistance and enhances host survival.
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Affiliation(s)
- Rodrigo Almeida-Paes
- Laboratório de Micologia, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil.,Departments of Medicine (Division of Infectious Diseases) & Microbiology & Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Maria Hg Figueiredo-Carvalho
- Laboratório de Micologia, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Leandro Br da Silva
- Departments of Medicine (Division of Infectious Diseases) & Microbiology & Immunology, Albert Einstein College of Medicine, Bronx, NY, USA.,Instituto de Ciências Biomédicas, Departamento de Microbiologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Gary Gerfen
- Department of Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Glauber R de S Araújo
- Laboratório de Biofísica de Fungos, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Susana Frases
- Laboratório de Biofísica de Fungos, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Rosely M Zancopé-Oliveira
- Laboratório de Micologia, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Joshua D Nosanchuk
- Departments of Medicine (Division of Infectious Diseases) & Microbiology & Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
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Occurrence and Distribution of Cryptococcus Species in Environmental Sources from Lower Assam Belt of India. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.4.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cryptococcus is a non-motile, gram positive, non-fermenting Basidiomycetous encapsulated yeast like fungus that causes respiratory, neurological and other systemic diseases in both humans and animals. Present study delineates the possible distribution of Cryptococcus species in pigeon droppings, excreta of other avian species, eucalyptus tree and contaminated soil specimens collected from different geographical co-ordinates of six geographical regions of the lower Brahmaputra Valley of Assam, India. The fungi were isolated through conventional methods of Sabouraud Dextrose Agar (SDA) and Bird Seed Agar (BSA) media and identified through negative staining of capsule as well as performing classical bio-chemical tests. Identity of the isolates was further confirmed through sequence analysis of ITS-1 and ITS-4 region of the 18S rDNA. Two pathogenic species of Cryptococcus were isolated from 67 (15.40%) of the 435 specimens. Of these positive isolates 41 (9.43%) belonged to Naganishia albida (Cryptococcus albidus) while 26 (5.98%) represented Papiliotrema laurentii (Cryptococcus laurentii). Both the species were recovered from 58 (18.35%) dry and 9 (7.56%) moist specimens. The percentage of prevalence of Naganishia albida in dry and moist specimens were 35 (11.07%) and 6 (5.04%) respectively. Contrary to this, the percentage of prevalence of Papiliotrema laurentii in dry and moist were 23 (7.28%) and 3 (2.52%) respectively. The findings indicate that Cryptococcus species have established a better ecological sustenance in dry specimens than moist. The findings of the investigation demonstrated that the prevalence of Cryptococcus albidus in attics, dovecotes / houses of pigeon fanciers, contaminated soil, eucalyptus tree and droppings of other birds were 11(12.36%) out of 89, 23(14.11%) of 163,2(3.23%) of 62,4(7.84%) of 51 and only 1(1.43%) out of 7 specimens respectively. The recovery of Papiliotrema laurentii in the above specimens were 3(3.37%), 20(12.27%), 1(1.61%), 1(1.96%) and 1(1.42%) respectively. The findings revealed that the prevalence of Naganishia albida is more than that of Papiliotrema laurentii in natural substrates. The notorious pathogenic fungi, Cryptococcus neoformans could not be isolated, indicative of the fact that the region selected for the study is not environmentally favorable for growth and sustenance of the species. Findings of the study clearly demonstrate the ecological and epidemiological significance of the non-neoformans species of the genus cryptococcus that needs further comprehensive studies to access the prevalence of the genus from public health point of view.
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Susceptibility of spotted doves (Streptopelia chinensis) to experimental infection with the severe fever with thrombocytopenia syndrome phlebovirus. PLoS Negl Trop Dis 2019; 13:e0006982. [PMID: 31276495 PMCID: PMC6636776 DOI: 10.1371/journal.pntd.0006982] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 07/17/2019] [Accepted: 04/27/2019] [Indexed: 12/02/2022] Open
Abstract
Background Severe fever with thrombocytopenia syndrome virus (SFTSV), an emerging human pathogen naturally transmitted by ticks, has spread widely since it was first detected in 2010. Although SFTSV-specific antibodies have been detected in wild birds, these natural reservoir and amplifying hosts for the virus have not been well studied. Methodology/Principle findings Here we report an experimental infection of spotted doves (Streptopelia chinensis) with two strains of SFTSV, JS2010-14, a Chinese lineage strain, and JS2014-16, a Japanese lineage strain, which represent the main viral genotypes currently circulating in East Asia. In these studies, we have determined that spotted doves are susceptible to SFTSV and the severity of the viremia is dose-dependent. When challenged with 107 and 105 PFU, all doves developed viremia which peaked 3–5 days post infection (dpi). Only a subset (25–62.5%) of the birds developed viremia when challenged at 103 PFU. Virulence of SFTSV in spotted doves was strain dependent. Infection with 107 PFU of strain JS2014-16 resulted in 12.5% mortality over 6.8 days and mean peak viremia titers of 106.9 PFU/mL in experimentally inoculated birds. All doves inoculated with 107 PFU of the JS2010-14 strain survived infection with relatively lower mean viremia titers (105.6 PFU/mL at peak) over 6.1 days. Conclusions/Significance Our results suggest that spotted doves, one of the most abundant bird species in China, could be a competent amplifying host for SFTSV and play an important role in its ecology. Between the two SFTSV strains, the strain of the Japanese lineage caused mortality, higher viremia titers in infected birds over a longer time period than did the Chinese strain. Our observations shed light on the ecology of SFTSV, which could benefit the implementation of surveillance and control programs. Severe fever with thrombocytopenia syndrome virus (SFTSV) is an emerging human pathogen naturally transmitted by ticks. Our recent study has showed that some species of migratory birds, such as swan geese and spotted doves, can be parasitized by Haemaphysalis longicornis, an SFTSV vector, and antibodies against the SFTSV detected in these species. These data demonstrate that migratory birds are infected with SFTSV and may also play a role in the infection of ticks with SFTSV. Other studies have reported that migratory bird routes and the distribution of H. longicornis in East Asia overlap with the geographic distribution of SFTSV. Migratory birds are known to be carriers and transmitters of infectious agents, like the causative agents of influenza, West Nile encephalitis, and Lyme disease. Wild birds often travel long distances carrying various parasites, including ticks, which may be infected with viruses and bacteria. It is therefore reasonable to hypothesize that migratory birds may have played an important role in spreading SFTSV in two potential transmission scenarios: 1) birds are infected with the virus and transmit it back to ticks endemically or in a distal region, or 2) they are carriers of parasitic ticks that are infected with the virus. Here we report an experimental infection of spotted doves (Streptopelia chinensis) with two strains of SFTSV, JS2010-14 from a Chinese lineage and JS2014-16 from a Japanese lineage, which represent the main viral genotypes currently circulating in East Asia. We determined that spotted doves are susceptible to SFTSV and that the severity of the viremia was dose and strain dependent. Infection with the strain of JS2014-16 led to a death rate of 12.5% and higher viremia titers in experimentally inoculated birds while doves inoculated with the JS2010-14 strain survived infection with relatively lower virus titers in the blood. These findings provide novel insights for understanding the rapid spread of the virus in a short time span, in particular the SFTSV strains from the Japanese lineage (genotype E).
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Magalhães Pinto L, de Assis Bezerra Neto F, Araújo Paulo de Medeiros M, Zuza Alves DL, Maranhão Chaves G. Candida species isolated from pigeon (Columbia livia) droppings may express virulence factors and resistance to azoles. Vet Microbiol 2019; 235:43-52. [PMID: 31282378 DOI: 10.1016/j.vetmic.2019.05.022] [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] [Received: 06/12/2018] [Revised: 05/27/2019] [Accepted: 05/27/2019] [Indexed: 10/26/2022]
Abstract
Even though it is widely known that Cryptococcus spp. may transmit cryptococcosis trough aerosol formed when dried birds (mainly pigeons) droppings are dispersed and become airborne, little is known about the role of these birds in harboring other pathogenic yeasts in their gastrointestinal tract, feathers and beaks, specifically because these animals often stay and reproduce close or even above air conditioner units. Here we evaluated the prevalence of pathogenic yeasts isolated from pigeon droppings collected in the outside area of a University Hospital in Brazil. We also aimed to investigate the pathogenic potential and antifungal susceptibility of Candida species of medical interest isolated from these samples. Therefore, we performed the evaluation of virulence factors attributes expression in vitro, including the ability to adhere to human buccal epithelial cells and biofilm formation and to produce lytic enzymes, such as phospholipases, proteinases and hemolysins. Antifungal susceptibility testing against fluconazole, itraconazole, amphotericin and micafungin was also performed. The Candida genus was the most prevalent in our study, with several medically important species being isolated. Of note, these strains were able to express several virulence factors in vitro, clearly showing their pathogenic potential. Our study was able to demonstrate that Candida spp. isolated from pigeon droppings may express virulence factors in the same manner of clinical isolates, suggesting a pathogenic potential for these yeasts. The fact these strains were collected from the outside area of a tertiary hospital may be of interest, because they may be a source of infection, specifically to immunocompromised hosts.
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Affiliation(s)
- Luciana Magalhães Pinto
- Laboratory of Medical and Molecular Mycology, Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Rua. Gal. Gustavo Cordeiro de Faria S/N, Petrópolis, CEP: 59012-570. Natal, Rio Grande do Norte, Brazil.
| | - Francisco de Assis Bezerra Neto
- Laboratory of Medical and Molecular Mycology, Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Rua. Gal. Gustavo Cordeiro de Faria S/N, Petrópolis, CEP: 59012-570. Natal, Rio Grande do Norte, Brazil.
| | - Mariana Araújo Paulo de Medeiros
- Laboratory of Medical and Molecular Mycology, Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Rua. Gal. Gustavo Cordeiro de Faria S/N, Petrópolis, CEP: 59012-570. Natal, Rio Grande do Norte, Brazil.
| | - Diana Luzia Zuza Alves
- Laboratory of Medical and Molecular Mycology, Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Rua. Gal. Gustavo Cordeiro de Faria S/N, Petrópolis, CEP: 59012-570. Natal, Rio Grande do Norte, Brazil.
| | - Guilherme Maranhão Chaves
- Laboratory of Medical and Molecular Mycology, Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Rua. Gal. Gustavo Cordeiro de Faria S/N, Petrópolis, CEP: 59012-570. Natal, Rio Grande do Norte, Brazil.
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Lee WD, Fong JJ, Eimes JA, Lim YW. Diversity and abundance of human-pathogenic fungi associated with pigeon faeces in urban environments. Mol Ecol 2017. [DOI: 10.1111/mec.14216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Won Dong Lee
- School of Biological Sciences; Seoul National University; Seoul Korea
- Faculty of Biology; Technion-Israel Institute of Technology; Haifa Israel
| | | | - John A. Eimes
- School of Biological Sciences; Seoul National University; Seoul Korea
- University College; Sungkyunkwan University; Suwon Korea
| | - Young Woon Lim
- School of Biological Sciences; Seoul National University; Seoul Korea
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Figueiredo-Carvalho MHG, Ramos LDS, Barbedo LS, Chaves ALDS, Muramoto IA, Santos ALSD, Almeida-Paes R, Zancopé-Oliveira RM. First description of Candida nivariensis in Brazil: antifungal susceptibility profile and potential virulence attributes. Mem Inst Oswaldo Cruz 2016; 111:51-8. [PMID: 26814644 PMCID: PMC4727436 DOI: 10.1590/0074-02760150376] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 11/16/2015] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the antifungal susceptibility profile and the production of
potential virulence attributes in a clinical strain of Candida
nivariensis for the first time in Brazil, as identified by sequencing the
internal transcribed spacer (ITS)1-5.8S-ITS2 region and D1/D2 domains of the 28S of
the rDNA. For comparative purposes, tests were also performed with reference strains.
All strains presented low planktonic minimal inhibitory concentrations (PMICs) to
amphotericin B (AMB), caspofungin (CAS), and voriconazole. However, our strain showed
elevated planktonic MICs to posaconazole (POS) and itraconazole, in addition to
fluconazole resistance. Adherence to inert surfaces was conducted onto glass and
polystyrene. The biofilm formation and antifungal susceptibility on biofilm-growing
cells were evaluated by crystal violet staining and a XTT reduction assay. All fungal
strains were able to bind both tested surfaces and form biofilm, with a binding
preference to polystyrene (p < 0.001). AMB promoted significant reductions (≈50%)
in biofilm production by our C. nivariensis strain using both
methodologies. This reduction was also observed for CAS and POS, but only in the XTT
assay. All strains were excellent protease producers and moderate phytase producers,
but lipases were not detected. This study reinforces the pathogenic potential of
C. nivariensis and its possible resistance profile to the azolic
drugs generally used for candidiasis management.
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Affiliation(s)
| | - Livia de Souza Ramos
- Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Leonardo Silva Barbedo
- Laboratório de Micologia, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | | | - Ilda Akemi Muramoto
- Laboratório de Micologia, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil
| | - André Luis Souza dos Santos
- Departamento de Microbiologia Geral, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Rodrigo Almeida-Paes
- Laboratório de Micologia, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | - Rosely Maria Zancopé-Oliveira
- Laboratório de Micologia, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
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Sanchez Betancourt AA, Sibaja Alvarez P, Camacho RA, Guevara Espinoza E. Candida famata mediastinitis. A rare complication of open heart surgery. Case report and brief review. IDCases 2016; 5:37-9. [PMID: 27419075 PMCID: PMC4942732 DOI: 10.1016/j.idcr.2016.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 06/30/2016] [Accepted: 07/01/2016] [Indexed: 11/12/2022] Open
Abstract
Candida mediastinitis is a rare complication of open heart surgery with high mortality and morbidity usually associated with C. albicans. We are reporting the case of a 57 year old male who after having a triple coronary artery bypass graft procedure, had mediastinitis caused by Candida famata, a yeast, that had only been reported once before as the causal agent of this condition. It is of vital importance, that future cases be reported, due to the fact that both reported cases have led to patient demise.
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12
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Canónico-González Y, Adame-Rodríguez JM, Mercado-Hernández R, Aréchiga-Carvajal ET. Cryptococcus spp. isolation from excreta of pigeons (Columba livia) in and around Monterrey, Mexico. SPRINGERPLUS 2013; 2:632. [PMID: 24349946 PMCID: PMC3862861 DOI: 10.1186/2193-1801-2-632] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 11/11/2013] [Indexed: 11/17/2022]
Abstract
The presence of Cryptococcus spp. has been reported in Mexico’s capital city; however, to our knowledge there are no reports of its presence in the state of Nuevo León located in northeast Mexico. This is presumed to be because the hot and dry climate in this region does not favor cryptococcal proliferation. This study confirmed the presence of C. neoformans and C. albidus in 20% (10/50) of randomly selected fecal samples of pigeons (Columba livia) in the Monterrey metropolitan area. The presence of this yeast in the state of Nuevo León is proof of its adaptation to the typically hot climate of the area and is consistent with recent reviews of cryptococcosis cases in several local hospitals. The two species were identified and characterized through microbiological tests and molecular identification by DNA extraction and PCR amplification of highly conserved 18S ribosomal DNA using ITS1 and ITS2 as target regions. The PCR products were sequenced and compared with those reported in GenBank.
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Affiliation(s)
- Yolanda Canónico-González
- Laboratorio de Micología y Fitopatología, Departamento de Microbiología e Inmunología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, México
| | - Juan Manuel Adame-Rodríguez
- Laboratorio de Micología y Fitopatología, Departamento de Microbiología e Inmunología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, México
| | - Roberto Mercado-Hernández
- Departamento de Ciencias Exactas Facultad de Ciencias Biológicas, Cd Universitaria, San Nicolás de los Garza, NL, México
| | - Elva Teresa Aréchiga-Carvajal
- Laboratorio de Micología y Fitopatología, Departamento de Microbiología e Inmunología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, México ; Unidad de Manipulación Genética, Laboratorio de Micología y Fitopatología (LMYF), Facultad de Ciencias Biológicas, Segundo Piso, Unidad C Universidad Autónoma de Nuevo León, Cd. Universitaria, Ave. Pedro de Alba s/n cruz Miguel L Barragán, San Nicolás de los Garza, Nuevo León, México
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13
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Wu Y, Du PC, Li WG, Lu JX. Identification and Molecular Analysis of Pathogenic Yeasts in Droppings of Domestic Pigeons in Beijing, China. Mycopathologia 2012; 174:203-14. [DOI: 10.1007/s11046-012-9536-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Accepted: 03/10/2012] [Indexed: 11/24/2022]
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