Candidiases, infections caused by germination forms of the Candida fungus, represent a heterogeneous group of diseases from systemic infection, through mucocutaneous form, to vulvovaginal form. Although caused by one organism, each form is controlled by distinct host immune mechanisms. Phagocytosis by polymorphonuclears and macrophages is generally accepted as the host immune mechanism for Candida elimination. Phagocytes require proinflammatory cytokine stimulation which could be harmful and must be regulated during the course of infection by the activity of CD8+ and CD4+ T cells. In the vaginal tissue the phagocytes are inefficient and inflammation is generally an unwanted reaction because it could damage mucosal tissue and break the tolerance to common vagina antigens including the otherwise saprophyting Candida yeast. Recurrent form of vulvovaginal candidiasis is probably associated with breaking of such tolerance. Beside the phagocytosis, specific antibodies, complement, and mucosal epithelial cell comprise Candida eliminating immune mechanisms. They are regulated by CD4+ and CD8+ T cells which produce cytokines IL-12, IFN-gamma, IL-10, TGF-beta, etc. as the response to signals from dendritic cells specialized to sense actual Candida morphotypes. During the course of Candida infection proinflammatory signals (if initially necessary) are replaced successively by antiinflammatory signals. This balance is absolutely distinct during each candidiasis form and it is crucial to describe and understand the basic principles before designing new therapeutic and/or preventive approaches.

• MeSH
• antifungální látky terapeutické užití   MeSH
• buněčná imunita MeSH
• Candida klasifikace   imunologie   patogenita   MeSH
• fagocytóza MeSH
• kandidóza farmakoterapie   imunologie   MeSH
• lidé MeSH
• přenašečství imunologie   MeSH
• přirozená imunita imunologie   MeSH
• T-lymfocyty imunologie   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• přehledy MeSH
• Názvy látek
• antifungální látky MeSH

The influence of subinhibitory concentrations of six established and 19 newly synthesized antifungal compounds on the dimorphic transition of three C. albicans strains was evaluated in the filamentation-inducing medium. Amphotericin B was found to produce almost complete inhibition in the germination at a concentration of 1/10 of the corresponding MIC and partial inhibition at a concentration as low as MIC/50. Flucytosine and four azole derivatives were proven ineffective. From the newly synthesized drugs, the incrustoporin derivative LNO6-22, two phenylguanidine derivatives (PG15, PG45), and four thiosalicylanilide derivatives, in particular, showed results comparable to those of amphotericin B, with a high inhibition of germ tube formation at concentrations of MIC/10. In general, concentrations of MIC/50 had no visible effect.

• MeSH
• amfotericin B farmakologie   MeSH
• antifungální látky chemická syntéza   chemie   farmakologie   MeSH
• Candida albicans účinky léků   růst a vývoj   MeSH
• gama-butyrolakton analogy a deriváty   chemická syntéza   chemie   farmakologie   MeSH
• guanidiny chemická syntéza   chemie   farmakologie   MeSH
• mikrobiální testy citlivosti metody   normy   MeSH
• morfogeneze účinky léků   MeSH
• salicylany chemická syntéza   chemie   farmakologie   MeSH
• sulfhydrylové sloučeniny chemická syntéza   chemie   farmakologie   MeSH
• vztah mezi dávkou a účinkem léčiva MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• amfotericin B MeSH
• antifungální látky MeSH
• gama-butyrolakton MeSH
• guanidiny MeSH
• incrustoporin MeSH Prohlížeč
• phenylguanidine MeSH Prohlížeč
• salicylany MeSH
• sulfhydrylové sloučeniny MeSH
• thiosalicylic acid MeSH Prohlížeč

Production of secreted aspartate proteinases was determined in a set of 646 isolates of Candida and non-Candida yeast species collected from 465 patients of the University Hospital in Olomouc (Czechia) in the period 1995-2002, and Candida samples obtained from 64 healthy volunteers using solid media developed for this purpose. Using random amplified polymorphic DNA analysis (RAPD) 79 Candida isolates from blood were analyzed to show potential relationships between clustering of the fingerprints and extracellular proteolytic activity of these strains. C. albicans, C. tropicalis and C. parapsilosis possess always proteolytic activity while non-Candida species did not display any proteolysis. A tight relationship between fingerprints and extracellular proteolysis in the Candida isolates was not shown. A remarkable consistency between fingerprint clusters and proteolysis occurred in a subset of C. parapsilosis samples. Suboptimal pH of the growth medium was shown to facilitate the investigation of potential co-incidence of genotypic and phenotypic traits.

• MeSH
• aspartátové endopeptidasy fyziologie   MeSH
• Candida enzymologie   patogenita   MeSH
• faktory virulence fyziologie   MeSH
• fungální proteiny fyziologie   MeSH
• koncentrace vodíkových iontů MeSH
• lidé MeSH
• technika náhodné amplifikace polymorfní DNA MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• aspartátové endopeptidasy MeSH
• faktory virulence MeSH
• fungální proteiny MeSH

Mycological analysis of swabs and scraping samples from the external ear canals of 40 patients with clinically diagnosed otomycosis (10 neonates, 30 adults) revealed the presence of fungi as etiological agents. They were investigated microscopically using 20 % potassium hydroxide, and by cultivation on Sabouraud's glucose agar. The Candida species were identified using the germ-tube test, micromorphology observations of colonies on rice agar, and particularly by the commercial kit AUXAcolor. The following Candida species were identified in the aural material examined: C. albicans (n = 21; 52.5 %), C. parapsilosis (11; 27.5), C. tropicalis (3; 7.5), C. krusei (3; 7.5), C. guilliermondii (2; 5.0). The above yeasts were present in samples together with Staphylococcus epidermidis (31), S. aureus (16), alpha-hemolytic streptococci (14), Neisseria spp. (14), Proteus mirabilis (3), Pseudomonas aeruginosa (3), Escherichia coli (1) and Haemophilus influenzae (1). The most frequent predisposing factors for otomycosis were swimming in public pools and/or bath, spa and diabetes mellitus.

• MeSH
• Candida klasifikace   izolace a purifikace   patogenita   MeSH
• dospělí MeSH
• druhová specificita MeSH
• kandidóza mikrobiologie   MeSH
• lidé MeSH
• novorozenec MeSH
• otitis externa mikrobiologie   MeSH
• rizikové faktory MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• novorozenec MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Slovenská republika MeSH

Restriction fragment length polymorphism analysis of the 5.8S rRNA gene and the internal transcribed spacers (ITS1 and ITS2) was used for examination of 66 isolates belonging to 19 species. Intraspecies variability was found in the examined region of 11 species (Candida albicans, C. catenulata, C. colliculosa, C. glabrata, C. kefyr, C. melinii, C. parapsilosis, C. guillermondii, C. solanii, C. tropicalis, Saccharomyces cerevisiae). Region of ITS-5.8S rDNA was amplified using the primers ITS1 and ITS4. The amplicons were digested by HaeIII, HinfI and CfoI. The recognized intraspecies variability was confirmed in the second step, in which the shorter fragments of this region were amplified using primers ITS1 and ITS2 and analyzed by capillary electrophoresis. Considerable intraspecific variability renders this method unsuitable for species identification, whereas it can be useful for epidemiological tracing of isolates.

• MeSH
• Candida klasifikace   genetika   MeSH
• DNA fungální analýza   MeSH
• DNA primery * MeSH
• druhová specificita MeSH
• elektroforéza kapilární MeSH
• genetická variace * MeSH
• geny rRNA MeSH
• houby klasifikace   genetika   MeSH
• lidé MeSH
• mezerníky ribozomální DNA analýza   genetika   MeSH
• mykologické určovací techniky MeSH
• mykózy mikrobiologie   MeSH
• polymerázová řetězová reakce metody   MeSH
• RNA ribozomální 5.8S analýza   genetika   MeSH
• Saccharomyces cerevisiae klasifikace   genetika   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• hodnotící studie MeSH
• práce podpořená grantem MeSH
• Názvy látek
• DNA fungální MeSH
• DNA primery * MeSH
• mezerníky ribozomální DNA MeSH
• RNA ribozomální 5.8S MeSH

The cryptococcal polysaccharide antigen was detected in 10 cerebrospinal fluid (CSF) and 23 serum samples from cryptococcal meningitis and intestinal cryptococcosis by the cryptococcal antigen latex agglutination system (CALAS). CALAS titers in CSF and serum samples of cryptococcal meningitis ranged over 8-2048 and 32-2048, respectively, while in cases of intestinal cryptococcosis, serum titers ranged over 8-2048. The isolates of yeast Cryptococcus neoformans were determined to be of serotype A or of the A/D pair. The total leukocyte count and biochemical parameters in CSF were significantly increased as indicators of microbial infection. Furthermore, the in vitro change of the teleomorph (sexual state) to the anamorph (asexual state) was also detected and the teleomorph state changed in vivo to the encapsulated anamoph state which is more virulent during infection in vivo than the yeast-like noncapsulated form. Two primers for internal transcribed spacer (ITS) regions of ribosomal DNA were used for molecular detection of C. neoformans. After PCR amplification, a DNA band of 415 bp, visualized on agarose gel, indicated the presence of C. neoformans cells in the tested CSF and serum samples. The primer sensitivity was also characterized using purified yeast chromosomal DNA as template; it was about 20 pg or more chromosomal DNA which represents about 10 cells of C. neoformans. The primers were also specific for ITS regions of C. neoformans and gave negative results with Candida albicans and E. coli chromosomal DNA templates.

• MeSH
• Cryptococcus neoformans klasifikace   genetika   izolace a purifikace   MeSH
• dítě MeSH
• DNA fungální krev   mozkomíšní mok   MeSH
• dospělí MeSH
• kryptokoková meningitida diagnóza   mikrobiologie   MeSH
• kryptokokóza diagnóza   mikrobiologie   MeSH
• latex fixační testy MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• mykologické určovací techniky MeSH
• nemoci střev diagnóza   mikrobiologie   MeSH
• polymerázová řetězová reakce metody   MeSH
• polysacharidy krev   mozkomíšní mok   MeSH
• předškolní dítě MeSH
• senzitivita a specificita MeSH
• sérotypizace MeSH
• Check Tag
• dítě MeSH
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• předškolní dítě MeSH
• Publikační typ
• časopisecké články MeSH
• hodnotící studie MeSH
• Geografické názvy
• Egypt MeSH
• Názvy látek
• cryptococcal polysaccharide MeSH Prohlížeč
• DNA fungální MeSH
• polysacharidy MeSH