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Updated: May 26, 2026

Comparative Analysis of Automatic Fecal Analyzer versus Direct Wet Smear Microscopy for Detecting Parasitic Infections in Stool Samples
Published on: April 25, 2025
Short report: Molecular insights for Giardia, Cryptosporidium, and soil-transmitted helminths from a facility-based
Daniel E Velasquez1, Wences Arvelo, Vitaliano A Cama
1Center for Global Health, Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, Georgia 30329, USA. DVelasquez@cdc.gov
Abstract:
We molecularly characterized samples with Giardia, Cryptosporidium, and soil-transmitted helminths from a facility-based surveillance system for diarrhea in Santa Rosa, Guatemala. The DNA sequence analysis determined the presence of Giardia assemblages A (N = 7) and B (N = 12) and, Cryptosporidium hominis (N = 2) and Cryptosporidium parvum (N = 2), suggestive of different transmission cycles. All 41 samples with soil-transmitted helminths did not have the β-tubulin mutation described for benzimidazole resistance, suggesting potential usefulness in mass drug administration campaigns.
