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Assessing stool quantities generated by three specific Kato-Katz thick smear templates employed in different settings
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 3564552
Author(s) Leuenberger, Andrea; Nassoro, Tatu; Said, Khadija; Fenner, Lukas; Sikalengo, George; Letang, Emilio; Montresor, Antonio; Zhou, Xiao-Nong; Steinmann, Peter; Marti, Hanspeter; Utzinger, Jürg; Knopp, Stefanie
Author(s) at UniBasel Knopp, Stefanie
Fenner, Lukas
Utzinger, Jürg
Steinmann, Peter
Marti, Hanspeter
Year 2016
Title Assessing stool quantities generated by three specific Kato-Katz thick smear templates employed in different settings
Journal Infectious Diseases of Poverty
Volume 5
Number 1
Pages / Article-Number 58
Abstract The Kato-Katz technique is recommended for the diagnosis of helminth infections in epidemiological surveys, drug efficacy studies and monitoring of control interventions. We assessed the comparability of the average amount of faeces generated by three Kato-Katz templates included in test kits from two different providers.; Nine hundred Kato-Katz thick smear preparations were done; 300 per kit. Empty slides, slides plus Kato-Katz template filled with stool and slides plus stool after careful removal of the template were weighed to the nearest 0.1 mg. The average amount of stool that was generated on the slide was calculated for each template, stratified by standard categories of stool consistency (i.e. mushy, soft, sausage-shaped, hard and clumpy).; The average amount of stool generated on slides was 40.7 mg (95 % confidence interval (CI): 40.0-41.4 mg), 40.3 mg (95 % CI: 39.7-40.9 mg) and 42.8 mg (95 % CI: 42.2-43.3 mg) for the standard Vestergaard Frandsen template, and two different templates from the Chinese Center for Disease Control and Prevention (China CDC), respectively. Mushy stool resulted in considerably lower average weights when the Vestergaard Frandsen (37.0 mg; 95 % CI: 34.9-39.0 mg) or new China CDC templates (37.4 mg; 95 % CI: 35.9-38.9 mg) were used, compared to the old China CDC template (42.2 mg; 95 % CI: 40.7-43.7 mg) and compared to other stool consistency categories.; The average amount of stool generated by three specific Kato-Katz templates was similar (40.3-42.8 mg). Since the multiplication factor is somewhat arbitrary and small changes only have little effect on infection intensity categories, it is suggested that the standard multiplication factor of 24 should be kept for the calculation of eggs per gram of faeces for all investigated templates.
Publisher Biomed Central
ISSN/ISBN 2049-9957
edoc-URL http://edoc.unibas.ch/43588/
Full Text on edoc Available
Digital Object Identifier DOI 10.1186/s40249-016-0150-9
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/27364623
ISI-Number 000381043000001
Document type (ISI) Journal Article
 
   

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