Rapid selective urease test for presumptive identification of Cryptococcus neoformans
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چکیده
منابع مشابه
Six-hour pigmentation test for the identification of Cryptococcus neoformans.
Cryptococcus neoformans colonies can be identified within 6 h using paper disks containing caffeic acid and ferric citrate. Indentification is based on the development of a dark brown pigment. Saprophytic Cryptococcus species and common clinically isolated yeasts do not develop the brown color. The concentration of the reagents and the method of storage of the impregnated paper disks are critic...
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A rapid test is described which distinguishes enterococci from other group D streptococci in 8 to 24 h by use of a medium containing brain heart infusion agar, NaCl, dextrose, and bromocresol purple.
متن کاملDisseminated infection caused by urease-negative Cryptococcus neoformans.
We report a case of fungemia and disseminated disease caused by a urease-negative strain of Cryptococcus neoformans in a patient with the acquired immune deficiency syndrome. Except for failure to hydrolyze urea, the microbiological characteristics of the isolate were typical of C. neoformans. Laboratory specialists should be aware of the occurrence of atypical strains of C. neoformans, particu...
متن کاملdirect urease test and acridine orange staining on bactec blood culture for rapid presumptive diagnosis of brucellosis
brucellosis is one of the most common zoonotic diseases in iran and human brucellosis is endemic in all parts of the country. growth of brucella is slow and blood culture of these bacteria by use of classical methods is time-consuming. furthermore, in endemic area culture is required for definitive diagnosis. in the present study, direct urease test and acridine orange staining were tried on th...
متن کاملComparison of the sensitivity of three methods for the rapid identification of Cryptococcus neoformans.
The sensitivity of three methods for the rapid identification of Cryptococcus neoformans was compared. These were: direct microscopy of india ink preparations, acridine orange staining followed by fluorescence microscopy and detection of cryptococcal capsular polysaccharide antigen by latex agglutination. The overall limit of detection was 3.5 +/- 5.4 X 10(3) CFU/ml (mean +/- SD, n = 27). When ...
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ژورنال
عنوان ژورنال: Journal of Clinical Microbiology
سال: 1979
ISSN: 0095-1137,1098-660X
DOI: 10.1128/jcm.10.3.380-381.1979