نتایج جستجو برای: smear negative
تعداد نتایج: 545149 فیلتر نتایج به سال:
For hospitalized patients with smear-positive pulmonary or laryngeal tuberculosis, the Centers for Disease Control and Prevention recommends that three consecutive sputum samples be negative for acid-fast bacilli (AFB) before respiratory isolation is discontinued. Limited data are available to predict the length of time to obtain three negative sputum smears and cultures and to determine factor...
Examination of 6,880 sputum specimens from untreated patients disclosed that 3.1% were positive for mycobacteria by fluorescence microscopy, and 92.5% of these has positive cultures. There was a positive correlation between the number of organisms seen on smear and growth on culture. All specimens with positive smears and negative cultures contained rare or few acid-fast bacilli on the smear. E...
Abstract Background and Objectives: one of the endemic foci for Cutaneous Leishmaniasis in Iran is Mashhad in which limited outbreak have recently been reported. The commonly used method for diagnosis is the clinical features confirmed by direct microspic examination and culture or biopsy. We compared these two tests to determine the level of their sensitivity, specificity and positive predicti...
BACKGROUND Tuberculosis (TB) caused by Mycobacterium tuberculosis is one of the leading causes of death from infectious diseases worldwide. Sputum smear microscopy remains the most widely available pulmonary TB diagnostic tool particularly in resource limited settings. A highly sensitive diagnostic with minimal infrastructure, cost and training is required. Hence, we assessed the diagnostic per...
BACKGROUND The utility of Mycobacterium tuberculosis direct nucleic acid amplification testing (MTD) for pulmonary tuberculosis disease diagnosis in the United States has not been well described. METHODS We analyzed a retrospective cohort of reported patients with suspected active pulmonary tuberculosis in 2008-2010 from Georgia, Hawaii, Maryland, and Massachusetts to assess MTD use, effectiv...
OBJECTIVE To determine the incidence of cervical cancer after several negative cervical smear tests at different ages. DESIGN Prospective observational study of incidence of cervical cancer after the third consecutive negative result based on individual level data in a national registry of histopathology and cytopathology (PALGA). SETTING Netherlands, national data. Population 218,847 women...
background : despite recent technologic improvements in identifying mycobacterium tuberculosis, we are still facing problems in rapid diagnosis of tuberculosis. the objective of this study is to determine the diagnostic value of a new rapid screening test (patho-tb™) for diagnosis of pulmonary tuberculosis. methods : between september 2006 to august 2007, 178 patients were enrolled in the study...
BACKGROUND Tuberculosis (TB) is a mycobacterial infection mainly affecting the lungs. Early and correct diagnosis of sputum smear negative patients by chest radiography (CXR) is challenging since it depends on reader's ability to detect abnormal findings and to interpret it correctly. OBJECTIVES To evaluate the validity and reliability of CXR the diagnosis of TB among smear negative pulmonary...
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