Establishing a protocol for water sample processing for the detection of Blastocystis sp

Area of Science:

• Environmental microbiology
• Parasitology
• Water quality assessment

Background:

• Blastocystis sp. is a common intestinal parasite found in humans and animals.
• Contaminated water sources pose a risk for Blastocystis sp. transmission.
• Standardized methods for detecting Blastocystis sp. in water are crucial for public health.

Purpose of the Study:

• To establish and validate a reliable protocol for processing water samples for Blastocystis sp. detection.
• To define optimal parameters for sample collection, storage, and parasite isolation.
• To provide a method for assessing Blastocystis sp. contamination in various water sources.

Main Methods:

• Optimized sample volume (1.0 µL) and storage conditions (4°C for up to 3 days).
• Standardized centrifugation (1400×g for 10 min) and density gradient centrifugation (Ficoll-Paque™ PLUS) for parasite isolation.
• Inoculation of 1×10⁵ cysts in Jones' medium with 10% horse serum, incubated at 37°C for 3 days.

Main Results:

• A validated protocol for Blastocystis sp. detection in water samples was successfully established.
• The protocol demonstrated effectiveness in identifying Blastocystis sp. vacuolar forms.
• The method was validated using 106 diverse water samples, confirming its applicability.

Conclusions:

• The developed protocol provides a robust method for quantifying Blastocystis sp. in water.
• This standardized approach will aid in identifying the extent of water contamination.
• The protocol is essential for understanding the public health implications of Blastocystis sp. in water sources.