ELISA: enzyme-linked immunosorbent assay IIF: indirect Immunofluorescence PNP: paraneoplastic pemphigus PV: pemphigus vulgaris INTRODUCTION Because of variability in clinical and histopathologic findings, the diagnosis of paraneoplastic pemphigus (PNP) frequently relies on the combination of direct immunofluorescence and indirect immunofluorescence (IIF). Here we present a unique case of PNP as...

BACKGROUND For detection of anti-nuclear antibodies (ANAs) and antibodies to extractable nuclear antigens (ENAs), samples frequently are screened with indirect immunofluorescence (IIF); further determination of anti-ENA antibodies is performed only when the result is positive. However, because anti-ENA reactivities are found in samples with low fluorescence intensities, we determined anti-ENA a...

High order spatial derivatives and stiff reactions often introduce severe temporal stability constraints on the time step in numerical methods. Implicit integration method (IIF) method, which treats diffusion exactly and reaction implicitly, provides excellent stability properties with good efficiency by decoupling the treatment of reactions and diffusions. One major challenge for IIF is storag...

OBJECTIVE To analyze the clinical value of anti-DFS70 antibodies in a cohort of patients undergoing routine antinuclear antibodies (ANAs) testing. METHODS Sera with a dense fine speckled (DFS) indirect immunofluorescence (IIF) pattern from 100 consecutive patients and 100 patients with other IIF patterns were tested for anti-DFS70 antibodies by a novel chemiluminescence immunoassay (CIA) and ...

Implicit integration factor (IIF) methods were developed in the literature for solving time-dependent stiff partial differential equations (PDEs). Recently, IIF methods are combined with weighted essentially non-oscillatory (WENO) schemes in [Jiang and Zhang, Journal of Computational Physics, 253 (2013) 368-388] to efficiently solve stiff nonlinear advection-diffusion-reaction equations. The me...

The enzyme-linked immunosorbent assay (ELISA) and indirect immunofluorescence (IIF) have both been used for testing of antibodies to desmogleins 1 and 3 (anti-Dsg1 and anti-Dsg3) and for the serologic diagnosis of pemphigus. IIF values and antibody concentrations and profile do not always correlate with a specific clinical phenotype and with the disease activity. The purpose of the present stud...

Pulmonary cytomegalovirus (CMV) infection causes fatal CMV pneumonia (CMVp) in immunocompromised patients; however, the mechanisms underlying CMV-infection-induced pulmonary lesion development remain largely unknown. We examined the relationship between CMVp patterns and intrapulmonary viral tropism, including expression of inflammatory cytokines and related molecules. Double immunohistochemist...

To evaluate commercially available diagnostic kits for human immunoglobulin G to Toxoplasma gondii, we purchased three enzyme immunoassay (EIA) (Cordia-T, Toxo Bio-EnzaBead, and Toxoelisa), two indirect hemagglutination (IHA) (TPM-Test and ToxHAtest), one fluoroimmunoassay (Toxoplasma-G FIAX), and one latex agglutination (Eiken Toxotest-MT) kit from U.S. suppliers. A total of 100 serum specimen...

Although cell-cell interactions are known to significantly affect the kinetics of intracellular ice formation (IIF) during tissue freezing, this effect is not well understood. Progress in elucidating the mechanism and role of intercellular ice propagation in tissue freezing has been hampered in part by limitations in experimental design and data analysis. Thus, using rapid-cooling cryomicroscop...

It was with great interest that we read the correspondence of Mahler and Fritzler on our recent European Vasculitis Study Group (EUVAS) study describing the performance of immunoassays for antineutrophil cytoplasmic antibodies (ANCA) in patients with ANCA-associated vasculitides (AAV). In their letter, Mahler and Fritzler raise some interesting points, mainly related to (i) test result interpre...