Diagnosis of soil-transmitted helminthiasis in an Amazonic community of Peru using multiple diagnostic techniques

  • Machicado J
  • Marcos L
  • Tello R
 et al. 
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Abstract

An observational descriptive study was conducted in a Shipibo-Conibo/. Ese'Eja community of the rainforest in Peru to compare the Kato-Katz method and the spontaneous sedimentation in tube technique (SSTT) for the diagnosis of intestinal parasites as well as to report the prevalence of soil-transmitted helminth (STH) infections in this area. A total of 73 stool samples were collected and analysed by several parasitological techniques, including Kato-Katz, SSTT, modified Baermann technique (MBT), agar plate culture, Harada-Mori culture and the direct smear examination. Kato-Katz and SSTT had the same rate of detection for Ascaris lumbricoides (5%), Trichuris trichiura (5%), hookworm (14%) and Hymenolepis nana (26%). The detection rate for Strongyloides stercoralis larvae was 16% by SSTT and 0% by Kato-Katz, but 18% by agar plate culture and 16% by MBT. The SSTT also had the advantage of detecting multiple intestinal protozoa such as Blastocystis hominis (40%), Giardia intestinalis (29%) and Entamoeba histolytica/. E. dispar (16%). The most common intestinal parasites found in this community were B. hominis, G. intestinalis, H. nana, S. stercoralis and hookworm. In conclusion, the SSTT is not inferior to Kato-Katz for the diagnosis of common STH infections but is largely superior for detecting intestinal protozoa and S. stercoralis larvae. © 2012 Royal Society of Tropical Medicine and Hygiene.

Author-supplied keywords

  • Diagnosis
  • Intestinal parasites
  • Kato-Katz technique
  • Peru
  • Soil-transmitted helminths
  • Spontaneous sedimentation in tube technique

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Authors

  • Jorge D. Machicado

  • Luis A. Marcos

  • Raul Tello

  • Marco Canales

  • Angelica Terashima

  • Eduardo Gotuzzo

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