ABSTRACT
Objective To provide reference for establishing diagnosis and differential diagnosis methods of rare yeast-like fungal bloodstream infection for clinical microbiology laboratory.Methods Trichosporon asahii (T.asa-hii)and Geotrichum capitatum (G.capitatum)bloodstream infection was diagnosed and differentially diagnosed through clinical data analysis,morphological examination,biochemical reactions,and molecular biology technology. Results Two types of yeast-like fungal bloodstream infections in case 1 and case 2 both occurred in leukemia agranulocytosis phase after chemotherapy,such infections were serious and highly similar.The cultivated colonies on blood agar plates of case 1 and case 2 were performed gram stain and microscopic examination.Hyphae,arthro-spores and microconidia were visible in the former,thickness of hyphae branches and length of arthrospores were different,most presented rectangular and barrel shape;the latter can be seen hyphae with transparent septum bro-ken up into arthrospores,presented rectangular shape,did not produce blastoconidia.Identification with API 20C AUX showed that they were T.asahii and G.capitatum.The PCR product sequences were compared with NCBI, suggesting that T.asahii and G.capitatum were at sexual stage.Conclusion Comprehensive application of a varie-ty of technical methods is helpful for improving the diagnosis accuracy of bloodstream infection with yeast-like fungi, identifying Trichosporon and Geotrichum to the species level may help physicians to understand such rare fungal in-fection,choose antifungal agents rationally,and improve clinical prognosis.
ABSTRACT
OBJECTIVE To find the active principle in Radix Scutellariae,Radix Sophorae Flavescentis and Flos Lonicerae in Gansu inhibiting yeast-like fungi of deep infection.METHODS Radix Scutellariae,Radix Sophorae Flavescentis and Flos Lonicerae were separately cleaned,toasted and grinded to fine power.Five kinds of(8 strains) yeast-like fungi that were collected and spread into 90mm Sabouraud plate.On aseptic condition,bored holes on Sabouraud plate with the drilling instrument of 6mm diameter,and filled every holes with 25.73mg fine powder of Radix Scutellariae,Radix Sophorae Flavescentis and Flos Lonicerae,and added 3 to 5 drops of distilled water in the medicinal powder.Under 35℃,the bacteria were cultured for 24 to 48 hours,and the size of bacteriostatic ring was observed.RESULTS The diameters of the bacteriostatic ring of Radix Scutellariae powder inhibiting five kinds of yeast-like fungi were separately 16.0mm,13.5mm,13.0mm,13.0mm and 10.5mm,respectively,and the diameter of Radix Sophorae Flavescentis and Flos Lonicerae powder was 0.CONCLUSIONS There is the active principle inhibiting yeast-like fungi in Radix Scutellariae,but not that in Radix Sophorae Flavescentis and Flos Lonicerae.