scholarly journals A Rapid Monoclonal Immunofluorescence Assay for Chlamydia Psittaci in Fecal Smears from Psittacine Birds

1989 ◽  
Vol 1 (2) ◽  
pp. 150-153 ◽  
Author(s):  
Leslie W. Woods ◽  
Jill F. Dotson ◽  
Anthony E. Castro
Keyword(s):  
Cell Culture ◽  
Chlamydial Infection ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Relative Sensitivity ◽  
Immunofluorescence Assay ◽  
Chlamydia Psittaci ◽  
Direct Immunofluorescence ◽  
California Department ◽  
Direct Fluorescent Antibody

One hundred two fecal specimens from psittacine birds submitted to Veterinary Laboratory Services of the California Department of Food and Agriculture at Petaluma were screened for Chlamydia psittaci by a direct immunofluorescence assay using a fluorescein-labeled monoclonal antibody conjugate specific for Chlamydia sp. Results were compared with those obtained by isolation of Chlamydia in cultures of McCoy mouse cells. The relative specificity of the direct fluorescent antibody test on fecal smears was 98.9% and the relative sensitivity was 62.5%. The results of this study suggested that the direct fluorescent antibody test was highly specific, and it proved to be a useful same-day antemortem diagnostic test for birds with symptomatic Chlamydial infection. The use of centrifugation in the cell culture assay was found to significantly enhance the level of Chlamydial infection in cell culture.

scholarly journals Comparison of Chemicon SimulFluor Direct Fluorescent Antibody Staining with Cell Culture and Shell Vial Direct Immunoperoxidase Staining for Detection of Herpes Simplex Virus and with Cytospin Direct Immunofluorescence Staining for Detection of Varicella-Zoster Virus

2001 ◽  
Vol 8 (5) ◽  
pp. 909-912 ◽  
Author(s):  
Edward L. Chan ◽  
Ken Brandt ◽  
Greg B. Horsman
Keyword(s):  
Cell Culture ◽  
Predictive Value ◽  
Fluorescent Antibody ◽  
Turnaround Time ◽  
Immunofluorescence Assay ◽  
Direct Immunofluorescence ◽  
Shell Vial ◽  
Varicella Zoster ◽  
Simplex Virus ◽  
Sensitivity Specificity

ABSTRACT A new rapid direct immunofluorescence assay, the SimulFluor direct fluorescent-antibody (DFA) assay, which can simultaneously detect herpes simplex virus types 1 and 2 (HSV-1 and -2) and varicella-zoster virus (VZV), was evaluated in comparison with our current standard procedures of (i) shell vial direct immunoperoxidase (shell vial IP) staining and cell culture for detection of HSV and (ii) cytospin DFA staining for VZV detection. A total of 517 vesicular, oral, genital, and skin lesion specimens were tested by all three procedures. For HSV detection, the SimulFluor DFA assay had an overall sensitivity, specificity, positive predictive value, and negative predictive value of 80.0, 98.3, 92.3, and 95.1%, respectively, when compared to culture. Shell vial IP staining had a sensitivity, specificity, positive predictive value, and negative predictive value of 87.6, 100, 100, and 96.9%, respectively, when compared with cell culture. The SimulFluor DFA assay, however, offers same-day, 1.5-hours results versus a 1- to 2-day wait for shell vial IP staining results and a 1- to 6-day wait for culture results for HSV. For VZV detection SimulFluor DFA staining detected 27 positive specimens as compared to 31 by our standard cytospin DFA technique—a correlation of 87.1%. A positive SimulFluor reaction for VZV is indicated by yellow-gold fluorescence compared to the bright apple-green fluorescence observed by cytospin DFA staining. There is no difference in turnaround time between the two assays. The SimulFluor DFA assay is a rapid immunofluorescence assay that can detect 80% of the HSV-positive specimens and 87% of the VZV-positive specimens with a 1.5-h turnaround time.

scholarly journals A Comparative Analysis of Polymerase Chain Reaction and Direct Fluorescent Antibody Test for Diagnosis of Genital Herpes

2017 ◽  
Vol 9 (01) ◽  
pp. 053-056 ◽  
Author(s):  
Vrushali Patwardhan ◽  
Preena Bhalla ◽  
Deepti Rawat ◽  
Vijay Kumar Garg ◽  
Kabir Sardana ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Genital Herpes ◽  
Fluorescent Antibody ◽  
Antibody Test ◽  
Conventional Polymerase Chain Reaction ◽  
Genital Ulcer ◽  
Chain Reaction ◽  
Direct Fluorescent Antibody ◽  
Polymerase Chain ◽  
Simplex Virus

ABSTRACT Objective: To compare laboratory tests that can simultaneously detect and type herpes simplex virus (HSV) directly from the genital ulcer specimens in clinically suspected cases of genital herpes. Materials and Methods: A study was conducted over 10 months and 44 adult male and female patients clinically suspected with genital herpes were recruited. Genital ulcer swab specimens were subjected to glycoprotein-G gene-based conventional polymerase chain reaction (PCR) and commercially available direct fluorescent antibody (DFA) test and the results were compared. Results: PCR for HSV was positive in 82% (36/44) cases. DFA was positive in 68.2% (30/44) cases. There was 100% agreement between HSV types detected by DFA and PCR. The strength of agreement between the results was better in primary genital herpes than recurrent cases. Conclusion: PCR was found to be better in the detection of HSV in recurrent genital herpes patients. It is a better modality, especially when genital herpes clinically presents with ulcerative or crusted lesions, and is also a cheaper alternative as compared to DFA.

Sign in / Sign up

Export Citation Format

Share Document