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排序方式: 共有160条查询结果,搜索用时 15 毫秒
1.
In an attempt to evaluate effects of liver injury and roles of iron metabolism on systemic fungal infection, experimental systemicCandida infection was produced in mice with galactosamine-induced liver injury. Survival rate and extent of fungal lesion are compared between mice with liver injury (Group 1) and ones without liver injury (Group 2). Median survival was 7 and 18 days in Group 1 and 2 respectively after 21 days observation. Mortality rate of Group 1 was significantly higher (P=0.05) than that of Group 2. This difference was reflected to the extent of fungal lesions in that they were extensive and disseminated, involving the multiple organs in Group 1 but predominantly localized to the kidneys in Group 2. UIBC (unbound iron binding capacity) and TIBC (total iron binding capacity), i.e., serum transferrin as well as serum iron levels were significantly lower in Group 1 as compared with those in Group 2. These results indicate that hepatic injury promotesCandida infectionin vivo and suggest that increased susceptibility toCandida in the presence of liver injury is, at least partially, attributable to low UIBC and/or TIBC. 相似文献
2.
Candida albicans is an opportunistic pathogen of human mucosal surfaces. Colonization of oral and vaginal mucosa by this yeast is antagonized by the resident normal bacterial population. However, antibacterial therapy can alter the normal flora to allow fungal cells to attach, grow and invade host tissues. We studied the antimicrobic activity of fluconazole against clinical isolates of oral and vaginal bacteria and Candida albicans in vitro and in vivo by scanning and transmission electron microscopy; we also compared the bactericidal activity of fluconazole with clotrimazole in vitro by microbiologie assay. Fluconazole lysed fungi but did not change the ultrastructure of bacteria. Clotrimazole, but not fluconazole, was bactericidal against lactobacillus and streptococcus, the principal species of the oral and vaginal cavities. We conclude that Candida albicans, but not oral and vaginal bacteria, is susceptible to fluconazole. These observations help explain the antimycotic specificity of fluconazole and its efficacy against candidiasis in humans. 相似文献
3.
Hiroshi Suzuki Hideaki Taguchi Kazuko Nishimura Makoto Miyaji Akira Nakamura Hironori Nakajima 《Mycopathologia》1988,104(1):7-17
Summary The authors succeeded in establishing a murine model of systemic candidiasis being disseminated from the primary gastrointestinal lesions caused by oral inoculation of Candida albicans. Using this model, an attempt was made for detecting the Candida antigen by enzyme-linked immunosorbent assay using avidin-biotin (AB-ELISA) from the serum of infected mice.Gastrointestinal candidiasis was formed in all of the 20 mice treated with the drugs (antibiotics, antineoplastic agents, hydrocortisone, etc.) and inoculated orally with C. albicans. Fourteen of these mice suffered from submucosal candidiasis, and C. albicans was cultured from the visceral organs in 12 of them. The assay by AB-ELISA was able to detect 1.0 ng/ml Candida mannan in the mouse serum. The Candida antigen was detected in the sera of 11 of the 14 mice with submucosal candidiasis. However, the antigen could not be detected in the sera of the 6 mice with intramucosal candidiasis.The assay by AB-ELISA is more sensitive and specific for the diagnosis of systemic candidiasis than other serological assays. 相似文献
4.
Transfer factor in chronic mucocutaneous candidiasis 总被引:3,自引:0,他引:3
Fifteen patients suffering from chronic mucocutaneous candidiasis were treated with an in vitro produced TF specific for Candida
albicans antigens and/or with TF extracted from pooled buffy coats of blood donors. CMI of the patients was assessed using
the LMT and the LST in presence of candidine. The aim of the study was the clinical evaluation of TF treatment and the incidence
of positive tests before, during, and after therapy. Immunological data were matched using the Chi square test. 87 LMT were
performed for each antigen dose and at the dilution of 1/50, 58.9% (33/56) tests were positive during non-treatment or non-specific
TF treatment. On the contrary 83.9% (26/31) were positive during specific TF treatment (P<0.05). In the LST, a significant
decrease of thymidine uptake in the control cultures in presence of autologous or AB serum was observed when patients were
matched according to non-treatment, and both non specific (P<0.05) and specific TF treatment (P<0.01). Only during specific
TF treatment was a significant increase of reactivity against the Candida antigen at the highest concentration noticed, when
compared with the period of non specific treatment (P<0.01). Clinical observations were encouraging: all but one patient experienced
significant improvement during treatment with specific TF. These data confirm that orally administered specific TF, extracted
from induced lymphoblastoid cell-lines, increases the incidence of reactivity against Candida antigens in the LMT. LST reactivity
appeared not significantly increased with respect to the periods of non treatment, but was significantly increased when it
was compared to the non-specific TF treatment periods. At the same time, a clinical improvement was noticed. 相似文献
5.
6.
Jin-E Zhang Dan Luo Rong-Yi Chen Yan-Ping Yang Ying Zhou Yi-Ming Fan 《Experimental Animals》2013,62(3):205-210
Qualitative measurement of the infective level is relatively difficult in experimental
vaginal candidiasis. Female BALB/c mice aged 8 to 10 weeks were randomly divided into E1,
E2 and E0 groups, which received subcutaneous injection of 0.05 mg, 0.1 mg of estradiol
benzoate or 0.1 ml soybean oil 3 days before vaginal inoculation, respectively, and
hormone treatment continued every other day thereafter. Each group was further divided
into infected and noninfected subgroups. The infected mice were inoculated intravaginally
with 10 µl (5 × 104 conidia) of Candida
albicans suspension, while the noninfected mice were inoculated with 10
µl phosphate-buffered saline. Direct microscopic examination, colony
count and vaginal histopathology including infection degree and inflammation extent were
performed at 3, 7 and 14 days post inoculation. Estrogen treatment increased the vaginal
fungal burden and extent of infection and inflammation compared with the control group,
and 0.3 mg/week estrogen generally induced more severe infection and inflammation than
0.15 mg/week estrogen did. Colony count peaked on day 3 and decreased remarkably after 7
days. Infection score increased gradually during the first 7 days and decreased on day 14,
while inflammation extent exacerbated progressively over the course of 14 days. This study
demonstrates that the modified histological scoring system might be more feasible than
colony count for evaluation of infectivity and dynamic change in experimental vaginal
candidiasis. 相似文献
7.
为研究外阴阴道假丝酵母菌病(Vulvovaginal Candidiasis,VVC)患者合并支原体和衣原体感染情况,对86例复发性VVC(recurrent Vulvovaginal Candidiasis,RVVC)患者、219例单纯性VVC患者以及健康妇女200例,分别进行解脲脲原体(Ureaplasma urealyticum,Uu)、人型支原体(mycoplasma hominis,Mh)和沙眼衣原体(Chlamydia trachomatis,CT)检测;所有VVC病例均进行真菌培养。RVVC组和单纯VVC组与对照组之间Uu、Mh及Uu混合Mh阳性率比较,差异均有统计学意义(P0.05)。而三组之间CT和CT混合支原体阳性率比较,均无显著性差异(P0.05)。真菌培养阳性组与阴性组之间,Uu阳性率比较有显著性差异(P0.05),而CT阳性率比较无显著性差异(P0.05)。结果表明,VVC患者合并Uu感染较正常人群明显增高,假丝酵母菌与Uu混合感染可能导致VVC的发生和复发。 相似文献
8.
Jessica Tauany Andrade Geisa Fantini de Figueiredo Luisa Ferreira Cruz Sarah Eliza de Morais Carla Daiane Ferreira Souza Flávia Carmo Horta Pinto Jaqueline Maria Siqueira Ferreira Marcelo Gonzaga de Freitas Araújo 《Revista iberoamericana de micología》2019,36(4):192-199
BackgroundCandida albicans is the main agent that causes vulvovaginal candidiasis. Resistance among isolates to azole antifungal agents has been reported.AimsDue to the well-known antifungal potential of curcumin, the purpose of this work was to evaluate the in vitro anticandidal activity of curcumin and its effect in the treatment of experimental vulvovaginal candidiasis.MethodsThe anticandidal activity of curcumin was investigated against eight Candida strains by the broth microdilution assay, and its mechanism of action was evaluated by testing the binding to ergosterol. Then, the effect of curcumin in the treatment of vulvovaginal candidiasis was evaluated in an immunosuppressed, estrogen treated rat model.ResultsCurcumin showed minimum inhibitory concentration values of 125–1000 μg/ml, and the best result was observed against Candida glabrata. The compound was shown to be able to bind to the ergosterol present in the membrane, event that may be the mechanism of action. In addition, in the in vivo model of vulvovaginal candidiasis with C. albicans, treatments reduced the vaginal fungal burden in infected rats after seven days of treatment with different doses.ConclusionsCurcumin could be considered a promising effective antifungal agent in the treatment of vulvovaginal candidiasis. 相似文献
9.
Yue-Mei Jin Shan-Shan Liu Tian-Min Xu Feng-Jun Guo Jun Chen 《Journal of cellular physiology》2019,234(8):13894-13905
Vulvovaginal candidiasis (VVC) is a common observed infection, affecting approximately 75% of women of reproductive age. Drug resistance represents a troublesome stumbling block associated with VVC therapy. Thus the aim of the present study was to provide information regarding the selection of potential drug targets for VVC. CXCR3-, CXCR4-, or CXCR/CXCR4 double-deficient mouse models of VVC were subsequently established, with changes to the load of Candida Albicans evaluated accordingly. The biological behaviors of the vaginal epithelial cells were characterized in response to the CXCR3-, CXCR4-, or CXCR3/CXCR4 double-knockout in vivo. Our initial observations revealed that in mice with VVC, CXCR3-, CXCR4-, or CXCR3 - CXCR4 double-knockout resulted in a decreased load of C. Albicans as well as reduced levels and proportion of Th17 cells. Proinflammatory cytokine production was found to be inhibited by CXCR3-, CXCR4-, or CXCR3/CXCR4 double-knockout whereby the mRNA and protein expressions CXCR3, CXCR4, IL-17, IL-6, and TNF-α exhibited decreased levels. CXCR3-, CXCR4-, or CXCR3/CXCR4 double-knockout appeared to function as positive proliferation factors, while playing a negative role in the processes of apoptosis and the cell cycle of vaginal epithelial cells. Taken together, the key findings of the study suggested that CXCR3/CXCR4 double-knockout could act to hinder the progression of VVC, highlighting its promise as a novel therapeutic target in the treatment of VVC. CXCR3 and CXCR4 genes may regulate Th17/IL-17 immune inflammatory pathways to participate in antifungal immunity. 相似文献
10.
Chronic atrophic candidiasis is prevalent in up to 72% of institutionalized geriatric populations and is causally associated with Candida albicans. Topical antifungal treatments are difficult to implement in some geriatric patients due to cognitive impairment, reduced motor dexterity and memory loss. Objective: This in vitro study incorporated antifungal agents into tissue conditioners to investigate the effectiveness of this method of drug delivery. Design: Combinations of nystatin, fluconazole, itraconazole and Coe Soft, Viscogel, Fitt were tested at 1, 3, 5, 7, 9 and 11wt/wt%, with and without sterilized saliva. 6 mm diameter cores were punched in Sabouraud plates pre-grown with standardized C. albicans. Antifungal agents plus tissue conditioner mixtures were injected into each core. Inhibition diameters were measured for 14 days. Results: Cores with only tissue conditioners acted as negative control and showed no significant inhibition activity (ANOVA, p>0.05). Peak activity was between 65 to 89 hours; followed by a plateau. Itraconazole had greater fungicidal activity than fluconazole; while nystatin was found to have the least fungicidal activity (ANOVA. p<0.05). The most effective concentration for nearly all combinations was 5%wt/wt (ANOVA, p<0.05). Specimens with saliva showed greater antifungal activity than those without (t-test. p<0.001). Itraconazole altered the physical properties of Viscogel hence this combination is not recommended for clinical use. Conclusion: The treatment of chronic atrophic candidiasis by incorporation of antifungal drugs into tissue conditioners is efficacious. 5% wt/wt itraconazole mixed with Coe Soft or Fitt is recommended for clinical study where compliance of patient or care giver cannot be relied upon. Peak antifungal activity at 3 days suggests that mixtures prepared for clinical study may be replaced soon after this time for maximum effectiveness. 相似文献