Shift in the prevalent human rotavirus detected by ribonucleic acid segment differences

Area of Science:

• Virology
• Epidemiology
• Molecular Biology

Background:

• Rotavirus is a leading cause of severe gastroenteritis in infants and young children worldwide.
• Previous studies identified distinct rotavirus ribonucleic acid (RNA) patterns based on gel electrophoresis.
• Understanding rotavirus epidemiology is crucial for public health interventions.

Purpose of the Study:

• To analyze the rotavirus RNA patterns in patients hospitalized with acute gastroenteritis in Mexico City during the 1978 season.
• To compare the observed RNA patterns with those from the 1977 season to identify epidemiological shifts.

Main Methods:

• Purification of rotavirus from clinical samples of nine hospitalized patients.
• Analysis of viral RNA using gel electrophoresis to determine distinct migration patterns.
• Comparison of RNA profiles between the 1977 and 1978 patient cohorts.

Main Results:

• Two distinct rotavirus RNA patterns, designated 2s and 22, were identified.
• A significant shift in the proportion of these patterns was observed between 1977 and 1978.
• The 2s pattern, previously found in 11% of patients in 1977, increased to 90% in 1978.
• Improved electrophoresis revealed subtle differences in RNA segment migration within and between patterns.

Conclusions:

• The rotavirus population in Mexico City experienced a major epidemiological shift between 1977 and 1978, with a dramatic increase in the prevalence of the 2s RNA pattern.
• These findings highlight the dynamic nature of rotavirus strains and the importance of ongoing molecular surveillance.