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A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.
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A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.

Published on: July 9, 2012

[Modified method for purifying Cryptosporidium oocysts]

Lei Huang1, Chun-xia An, Su-mei Zhang

  • 1College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China.

Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi = Chinese Journal of Parasitology & Parasitic Diseases
|April 24, 2010
PubMed

Insights

Sheather's sucrose solution effectively purifies Cryptosporidium oocysts, offering a viable alternative to traditional phosphate-buffered saline (PBS). This method ensures high oocyst recovery and viability for research applications.

Area of Science:

  • Parasitology
  • Microbiology
  • Biotechnology

Context:

  • Purification of Cryptosporidium oocysts is crucial for diagnostic and research purposes.
  • Phosphate-buffered saline (PBS) is commonly used but alternatives are sought.
  • Sheather's sucrose solution offers a potential alternative for oocyst purification.

Purpose:

  • To evaluate the efficacy of Sheather's sucrose solution as an alternative to PBS for purifying Cryptosporidium oocysts.
  • To determine the recovery rates, viability, and excystation rates of purified oocysts.

Summary:

  • Sheather's sucrose solution diluted with distilled water was used to purify Cryptosporidium andersoni, C. baileyi, and C. suis oocysts.
  • Recovery rates were 47.5%, 49.6%, and 41.7%, respectively.
  • High oocyst viability (95.1-97.9%) and excystation rates (80.0-87.9%) were observed after purification.

Impact:

  • Provides a validated, effective alternative purification method for Cryptosporidium oocysts.
  • Ensures high viability and excystation rates, crucial for downstream experimental procedures.
  • Facilitates research in Cryptosporidium biology, diagnostics, and control strategies.

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