grading of smears examined in ordinary microscopy at 1000x magnification after zn staining
DESCRIPTION
Grading of smears examined in ordinary microscopy at 1000X magnification after ZN staining. ----- smear contains no AFB in 100 fields. NEG. How will you grade a smear with 9 AFB in 100 fields ?. positive(Actual) 09 AFB. ------ Smear with more than 10 AFB per field. 3 +. - PowerPoint PPT PresentationTRANSCRIPT
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Grading of smears examined in ordinary microscopy at 1000X
magnificationafter ZN staining
![Page 2: Grading of smears examined in ordinary microscopy at 1000X magnification after ZN staining](https://reader036.vdocuments.site/reader036/viewer/2022070423/568167e4550346895ddd4eba/html5/thumbnails/2.jpg)
----- smear contains no AFB in 100 fields.
NEG
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How will you grade a smear with 9 AFB in 100
fields ?
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------ Smear with more than 10 AFB per field.
3 +
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A smear with 1 to 9 bacilli in majority of the fields will be graded as:
2 +
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Smear grade: 2 +(1-9 AFB /field in at
least 50 fields)
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Smear Grade: 1 +
10 - 99 AFB in 100 fields
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Smear Grade:actual
( < 10 AFB in 100 fields)
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Grade the
following smears:
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Positive (6AFB)
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Positive 1+
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1 + (86 AFB/96 HPF)
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Positive 2 +
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Positive (8 AFB)
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Positive 1 +
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CreditRevised National Tuberculosis
Control Program-Tuberculosis Research Center
Chennai, India