Evaluation of different concentration techniques for microscopic diagnosis of protozoa and helminths in stool samples

Krati Agarwal1, Shailja Mishra1, Parul Singh1

  • 1Department of Microbiology, AIIMS, Gorakhpur, Uttar Pradesh, India.

Insights

The Formol-Ether Acetate Concentration (FAC) technique is superior for detecting intestinal parasitic infections in children compared to Formal-Ether Concentration (FEC) and wet mount methods. This improved detection aids in understanding IPI prevalence and guiding public health strategies.

Area of Science:

  • Medical Parasitology
  • Pediatric Infectious Diseases
  • Public Health

Background:

  • Intestinal parasitic infections (IPIs) significantly impair child development in developing nations.
  • These infections worsen malnutrition and affect physical and intellectual growth in early childhood.

Purpose of the Study:

  • To compare the diagnostic performance of stool concentration techniques (Formol-Ether Acetate Concentration [FAC] and Formal-Ether Concentration [FEC]) against routine wet mount examination for identifying intestinal parasites in children.
  • To evaluate the effectiveness of different diagnostic methods in a hospital-based setting.

Main Methods:

  • A cross-sectional study was conducted involving 110 children aged six months to five years presenting with diarrhea.
  • Diagnostic performance was assessed by comparing results from wet mount examination, FAC, and FEC.

Main Results:

  • Formol-Ether Acetate Concentration (FAC) detected parasites in 75% of cases, Formal-Ether Concentration (FEC) in 62%, and wet mount in 41%.
  • Protozoan infections, including Blastocystis hominis, Entamoeba coli, Entamoeba histolytica, and Giardia lamblia, were most prevalent.
  • Concentration methods demonstrated superior detection rates for IPIs, especially for dual infections.

Conclusions:

  • The Formol-Ether Acetate Concentration (FAC) technique exhibits higher sensitivity than FEC and wet mount for diagnosing IPIs.
  • Environmental, socioeconomic, and geographical factors influence IPI prevalence.
  • FAC is recommended for its efficacy, safety, and suitability for rural settings, emphasizing the need for enhanced public health measures.
Abstract

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