PUBLISHED PAPERS ON THE NEWTON PORTABLE FIELD MICROSCOPE

Evaluation of portable microscopic devices for the diagnosis of Schistosoma and soil-transmitted helminth infection


Authors
ISAAC I. BOGOCH, JEAN T. COULIBALY, JASON R. ANDREWS, BENJAMIN SPEICH, JENNIFER KEISER, J. RUSSELL STOTHARD, ELIÉZER K. N’ GORAN & JÜRG UTZINGER

Published February 2014


SUMMARY
The diagnosis of parasitic worm (helminth) infections requires specialized laboratory settings, but most affected individuals reside in locations without access to such facilities. We tested two portable microscopic devices for the diagnosis of helminth infections in a cross-sectional survey in rural Côte d’Ivoire. We examined 164 stool samples under a light microscope and then re-examined with a commercial portable light microscope and an experimental mobile phone microscope for the diagnosis of Schistosoma mansoni and soil-transmitted helminths...


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Quantitative Evaluation of a Handheld Light Microscope for Field Diagnosis of Soil-Transmitted Helminth Infection


Authors
Isaac I. Bogoch, Jason R. Andrews, Benjamin Speich, Shaali M. Ame, Said M. Ali, J. Russell Stothard, Ju¨ rg Utzinger, and Jennifer Keiser

Published 2014


ABSTRACT
We evaluated the Newton Nm1, a commercially available handheld light microscope and compared it with conventional light microscopy for the diagnosis of soil-transmitted helminth infections. A total of 91 Kato-Katz thick smears were examined by experienced microscopists and helminth eggs were counted and expressed as eggs per gram of stool (EPG). Mean egg counts were significantly higher with the conventional light microscope (5,190 EPG versus 2,386 EPG for Ascaris lumbricoides; 826 versus 456 for Trichuris trichiura; both P < 0.05)...


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