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  • Title: Mannan and D-arabinitol concentrations in serum from a patient with Candida albicans endocarditis.
    Author: Fujita S, Maeno K, Soyama K.
    Journal: Mycopathologia; 1989 Feb; 105(2):87-92. PubMed ID: 2501687.
    Abstract:
    In an attempt to clarify the comparative values of serological and microbiological examinations for the early diagnosis of systemic candidiasis, antibodies against Candida albicans, serum mannan, and the D-arabinitol creatinine ratio were investigated in a patient with aortic valve endocarditis associated with carcinoma of the bile duct. Candida precipitins and the antibody titer against Candida cell wall mannan were examined by an immunodiffusion technique and hemagglutination test, respectively. Serum mannan was tested by enzyme-linked immunosorbent assay (ELISA) using the biotin-streptavidin procedure. The upper limit of negativity of the assay was determined by adding 0.06 to the absorbance of pooled serum from healthy laboratory workers. This value was about 0.8 ng/ml with ELISA. The D-arabinitol concentration in serum was examined by an enzymatic fluorometric method. Rising antibody titers against C. albicans, mannan antigenemia, and an elevated D-arabinitol creatinine ratio were first observed between the 11th and 12th hospital days. Blood cultures obtained on 8th, 9th, and 11th hospital days grew C. albicans after 3 to 4 days of incubation. Of 11 serum samples, 5 were positive for mannan, whereas D-arabinitol creatinine ratio was positive in 7 of 9 samples. Blood cultures was the earliest evidence of Candida infections in our cases. However, because of saprophytic nature of Candida species, tests for antibodies, antigenemia, and the D-arabinitol creatinine ratio in combination with blood cultures are necessary to confirm systemic candidiasis at an early stage of infection.
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