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Updated: May 6, 2026

Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children
Published on: August 22, 2012
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.
Introduction:
Intestinal parasitic infections (IPIs) are prevalent among children in developing countries, particularly in tropical and subtropical regions. These infections significantly impact physical and intellectual development and exacerbate nutritional deficiencies in early childhood.
Materials And Methods:
This hospital-based cross-sectional study, conducted at AIIMS, Gorakhpur, from July to December 2023, involved 110 children aged six months to five years with diarrhea. The study compared the diagnostic performance of routine wet mount examination and stool concentration techniques (Formol-Ether Acetate Concentration [FAC] and Formal-Ether Concentration [FEC]) for identifying intestinal parasites.
Result:
FAC detected parasites in 75% of cases, FEC in 62%, and wet mount in 41%. Protozoan infections were predominant, with Blastocystis hominis, Entamoeba coli, Entamoeba histolytica, and Giardia lamblia being the most common. Dual infections were better detected by concentration methods.
Conclusion:
The study highlighted the higher sensitivity of FAC over FEC and wet mount techniques. Environmental, socioeconomic, and geographical factors influenced the prevalence and distribution of IPIs. The study emphasizes the need for improved public health measures, including health education, safe water, and sanitation facilities. The formol-ether acetate concentration technique is recommended for its higher recovery rate, safety, and feasibility in rural settings, requiring minimal infrastructure.
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