RESUMO
A 65-year old diabetic male presented with progressive bone destruction of thoracic spine (T-11&12) with cord compression. Candida albicans was isolated from aspirated materials pre-and intra-operative. Two weeks of fluconazole was given prior to surgical debridement, and fixation of the lesion. C. albicans isolated pre-and 2-weeks after fluconazole treatment were DNA-typed using AP-PCR. MIC was 2-4 mg/l in all isolates tested. The pre-and post treatment isolates had two DNA patterns, indicating the existence of two different strains. Surgical treatment was necessary for patient recovery.
Assuntos
Antifúngicos/uso terapêutico , Candida albicans/genética , Candidíase/terapia , Fluconazol/uso terapêutico , Osteomielite/terapia , Espondilite/terapia , Vértebras Torácicas , Idoso , Candidíase/complicações , Candidíase/microbiologia , Impressões Digitais de DNA , DNA Fúngico , Desbridamento , Diabetes Mellitus Tipo 1/complicações , Humanos , Masculino , Osteomielite/complicações , Osteomielite/microbiologia , Compressão da Medula Espinal/complicações , Espondilite/complicações , Espondilite/microbiologiaRESUMO
OBJECTIVE: To determine the rate of the prozone phenomenon in our patient population. METHODS: Sera from 4328 patients--3504 females (2065 pregnant, 1439 nonpregnant) and 824 males--were tested for syphilis by the rapid plasma reagin (RPR) test, and then rechecked with serial twofold dilutions of up to 16-fold to detect the prozone phenomenon. Chi-square analysis with Yates correction was used, with P < or = .05 considered significant. RESULTS: The total positivity rate in females was 6% (213 patients); 13% (27) of the positive tests were false-positive reactions as confirmed by a negative anti-treponemal antibody test. Only one prozone reaction was detected, in serum from a male subject, but it was not missed on initial screening. CONCLUSION: The rate of prozone phenomenon is very low (95% confidence interval 0-0.4%), and routine serial dilutions are not cost effective.
Assuntos
Programas de Rastreamento , Complicações Infecciosas na Gravidez/diagnóstico , Sorodiagnóstico da Sífilis/métodos , Sífilis/diagnóstico , Distribuição de Qui-Quadrado , Reações Falso-Positivas , Feminino , Humanos , Incidência , Técnicas de Diluição do Indicador , Masculino , GravidezRESUMO
BACKGROUND AND OBJECTIVES: Inaccurate test results for syphilis may cause an individual to experience serious effects. GOAL OF THE STUDY: Investigate potential sources of error and test limitations causing false-negative reactions. STUDY DESIGN: In 5 months, two laboratories screened 2,232 patients for syphilis by the Rapid Plasma Reagin (RPR) test. RESULTS: The hospital laboratory reported 5.3% (64/1,210) of patients' test as reactive on initial screening, and the research laboratory found 6.4% (78/1,210) reactive. Fourteen reactive patients were incorrectly reported negative by the hospital laboratory, as confirmed by both laboratories. A refrigerated centrifuge in the hospital laboratory possibly caused sera to be cooled before testing, producing false-negative results. When its temperature was adjusted from 4 degrees C to 27 degrees C, an additional 1,022 samples tested were consistent between the two laboratories. CONCLUSION: Cold temperature produces false-negative reactions for syphilis screenings in patients' samples with titers < 1:4 dilution. Patients' samples with titers > or = 1:16 dilution were not affected. According to this study, incorrect temperatures for test sera can alter testing outcomes. Therefore, test manufacturer's directions must be strictly followed.