Characterization of pig rotavirus RNA

Area of Science:

• Virology
• Molecular Biology
• Veterinary Science

Background:

• Rotaviruses are a significant cause of gastroenteritis in young animals.
• Understanding the genetic makeup of different rotavirus strains is crucial for disease control.

Purpose of the Study:

• To characterize the RNA genome of pig rotavirus.
• To compare the RNA profile of pig rotavirus with that of calf rotavirus.

Main Methods:

• Purification of pig rotavirus from fecal samples.
• Resistance assay using pancreatic ribonuclease to determine RNA structure.
• Polyacrylamide-agarose gel electrophoresis to analyze RNA segments.
• Co-electrophoresis to compare RNA profiles of different rotavirus strains.

Main Results:

• Pig rotavirus RNA demonstrated resistance to pancreatic ribonuclease, confirming its double-stranded nature.
• Electrophoresis revealed 9 bands, indicating 11 or 12 RNA segments with a total molecular weight of approximately 11 x 10^6.
• Co-electrophoresis showed indistinguishable RNA patterns between pig rotavirus and two calf rotavirus isolates.

Conclusions:

• Pig rotavirus possesses a double-stranded RNA genome segmented into 11 or 12 segments.
• The genetic profile of pig rotavirus RNA is highly similar to that of calf rotavirus, suggesting potential cross-species transmission or shared origins.