Coexistence of Candida species and bacteria in patients with cystic fibrosis

AbstractCystic fibrosis (CF) patients become colonized by pathogenic bacteria as well as byCandida species. The interplay between different microorganisms may play a key role in the prognosis of CF. The aim of the study was to analyze the coexistence patterns of bacteria andCandida spp. in sputum samples of patients with CF and to compare these patterns with the results of patients with other respiratory disorders (ORD). Sputum samples from 130 patients with CF and 186 patients with ORD were cultured on six different agar plates promoting the growth of bacteria and yeasts. Bacterial andCandida species were identified with MALDI-TOF MS. Pathogenic bacteria were found in 69.2% of the sputum samples of the CF patients, and in 44.1% the patients with ORD. CF patients tended to have growth ofPseudomonas aeruginosa andStaphylococcus aureus in sputum more often than patients with ORD. Overall, there was no difference in the coexistence of pathogenic bacteria andCandida spp. in these patient groups. However, when analyzed at the species level,P. aeruginosa andS. aureus coexisted withCandida spp. more frequently in sputum samples of CF patients compared with patients with ORD. Also, when analyzed according to age, it was shown that the adult ( ≥ 18 years) CF patients had a higher rate of coexistence of any pathogenic bacteria andCandida spp. than the children with CF and the adult patients with ORD. The rate for colonization withCandida together with pathogenic bacteria...
Source: European Journal of Clinical Microbiology and Infectious Diseases - Category: Microbiology Source Type: research

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The airways of people with cystic fibrosis (CF) provide a nutrient-rich environment which favours colonisation by a variety of bacteria and fungi. Although the dominant pathogen associated with CF airway infections is Pseudomonas aeruginosa, it is becoming increasingly clear that inter-species interactions between P. aeruginosa and other colonists in the airways may have a large impact on microbial physiology and virulence. However, there are currently no suitable experimental models that permit long-term co-culture of P. aeruginosa with other CF-associated pathogens. Here, we redress this problem by describing a “3R...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Aim: To investigate the role of different types of bronchial infection and respiratory symptoms upon lung function decline.Methods: 89 children and adults with CF (mean (SD) age: 11.71 (6) years) performed 1340 serial Multiple Breath Washout (MBW) tests and 980 spirometries over a 5-year period. Respiratory symptoms (cough, sputum, nasal congestion) and Pulmonary Exacerbations (PEx) were recorded. Pseudomonas Aeruginosa, Staphylococcus aureus infection, as well as aspergillus, candida, Achromobacter, Acinetobacter, Serratia and Stenotrophomonas Maltophilia isolated from cough swabs/ sputum cultures were recorded.Results: M...
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Cystic fibrosis Source Type: research
Santosh K. Ghosh1*, Thomas S. McCormick1,2 and Aaron Weinberg1* 1Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, United States 2Dermatology, School of Medicine, Case Western Reserve University, Cleveland, OH, United States Human beta-defensins (hBDs, −1, 2, 3) are a family of epithelial cell derived antimicrobial peptides (AMPs) that protect mucosal membranes from microbial challenges. In addition to their antimicrobial activities, they possess other functions; e.g., cell activation, proliferation, regulation of cytokine/chemokine production, migration, diffe...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
In conclusion, circulating MDSCs are measurable, functional and have a G-MDSC phenotype in lung transplant patients. Their frequency is increased in stable patients, decreased during post-transplant complications, and related to level of immunosuppression. This study may pave the way for further investigations of MDSC in the context of lung transplantation. Introduction From a transplant immunological point of view, graft acceptance is the fundamental element in allograft survival. Graft acceptance is realized by blocking the immune system with immunosuppression preventing host immune cells to recognized and attack...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
We examined whether the high charge on ZmD32 would allow this defensin to retain activity in media with elevated salt concentrations. ZmD32 inhibited C. albicans, C. auris, C. glabrata, C. krusei, C. parapsilosis, and C. tropicalis growth with IC50 values ranging from 0.7 to 3.0 in ½ PDB medium containing 100 mM NaCl. In contrast, NaD1 was only active against C. parapsilosis and C. tropicalis with IC50 values of 3.4 and 1.3 μM, respectively, in medium with added NaCl. ZmD32 also retained activity against E. coli when NaC1 concentrations were raised to 100 mM while NaD1 did not (Table 1). For C. albicans and C. kr...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
In this study they also showed PTX3 localized in NETs formed after neutrophil activation (5). Proteomics analysis revealed that PTX3 forms complexes with two anti-microbial proteins [azurocidin (AZU1) and myeloperoxidase (MPO)] associated to NETs (30). More recently, PTX3 localization in NETs has been confirmed, and the colocalization with AZU1 and MPO has been defined more accurately (31). Further investigation will be needed to understand the involvement of PTX3 interaction with AZU1 and MPO in their antibacterial role during NET formation. Regulation of Complement Activation PTX3 interaction with microorganisms is not...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Raquel Ferrer-Espada1,2, Xiaojing Liu1,2, Xueping Sharon Goh1,2 and Tianhong Dai1,2* 1Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States 2Vaccine &Immunotherapy Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States Polymicrobial biofilms, in which mixed microbial species are present, play a significant role in persistent infections. Furthermore, polymicrobial biofilms promote antibiotic resistance by allowing interspecies transfer of antibiotic resistance genes. In the present study, we investigated the effec...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Conclusions: DR4 and DR11, which recognize the gene products of the HLA-DR B1 alleles, are the most prominent in the Iranian CF population and further research on should be conducted on DR4+ CF patients to understand the role in clinical phenotypes of CF.
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Cystic fibrosis Source Type: research
We describe a case of a 5-year-old child who presented with a CVC-related infection due to Candida parapsilosis. Echocardiogram revealed the presence of an incidental thrombus, measuring 1.4  cm × 0.4 cm, at the tip of the catheter, adherent to the right atrial wall and discrete from the tricuspid valve leaflets.
Source: Journal of Vascular Nursing - Category: Nursing Authors: Source Type: research
Background: Moulds are frequently recovered from respiratory samples of cystic fibrosis (CF) patients. During the last decade, antifungal resistance in non-Candida species is increasingly reported. Azole resistance in Aspergillus fumigatus is a well-known problem and it was firstly reported in 1997 in three itraconazole-resistant clinical isolates. Since then, the main azole resistance mechanism reported are mutations at the CYP51A gene which encodes the azole drug target, the 14- α-sterol demethylase.
Source: International Journal of Infectious Diseases - Category: Infectious Diseases Authors: Tags: UMP. 494 Source Type: research
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