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Detection of acid fast bacilli (AFB) in tuberculous lymphadenitis among adult Ethiopians.
MedLine Citation:
PMID:  21280429     Owner:  NLM     Status:  In-Process    
BACKGROUND: The sensitivity of conventional methods used in mycobacteriology laboratories may not exceed 40% in extrapulmonary cases of tuberculosis. Fine needle aspiration cytology (FNAC) is the best and affordable alternative method of diagnosing tuberculous (TB) lymphadenitis. However detection of acid fast bacilli (AFB) remains the corner stone of confirming diagnosis of TB.
OBJECTIVES: To investigate the detection rate of AFB in FNAC specimens using the Ziehl Neelsen staining method and see if bacillary detection depends on cytomorphologic features of inflammation.
METHODS: All consecutive adult patients having solitary or multiple peripheral lymphnode enlargements and diagnosed cytologically as TB lymphadenitis were included in the study. Aspirated samples were expressed on two glass slides and one is stained with Wright's stain for cytology, while the other is stained using the Ziehl Neelsen method for AFB. Cytologic findings were categorized in to three groups as non-caseating granuloma, caseating granuloma and pyo-histiocytic inflammation.
RESULTS: Only 52 (21.9%) aspirated samples were found to be positive for AFB. The most interesting finding in this study is that among the 52 AFB positive cases, 47 (53.4%) were cytomorphologically of the pyo-histiocytic type.
CONCLUSION: Detection of AFB varies with the cytomorphology of inflammation, being very high in pyo-histiocytic type.
Mesfin Nigussie; Girmachew Mamo
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ethiopian medical journal     Volume:  48     ISSN:  0014-1755     ISO Abbreviation:  Ethiop. Med. J.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2011-02-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0373223     Medline TA:  Ethiop Med J     Country:  Ethiopia    
Other Details:
Languages:  eng     Pagination:  277-83     Citation Subset:  IM    
Bahir Dar University Medical Faculty, Department of Pathology, Bahir Dar, Ethiopia.
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