Recurrent rotavirus diarrhoea outbreaks in a stud farm, in Italy.

The research article discusses the recurrent outbreaks of rotavirus diarrhoea in a stud farm in Italy. The research conducted includes collecting stool samples across consecutive years to identify the type of rotavirus and its persistent strain.

Collecting Stool Samples

• The research focused on a stud farm where young foals and their mares were showing signs of rotavirus diarrhoea. This virus is typically more prevalent in colder seasons.
• The researchers collected a total of 47 stool samples across the period of this study. The samples were collected during three consecutive winter seasons starting from January-February 2008.
• The recurring infections would disappear during warmer seasons and reappear in the cold seasons, indicating a possible seasonal cycle.

Rotavirus Samples and Genotypes

• The researchers used a method called nested RT-PCR to determine the G- and P-types of the rotavirus in samples collected in the years 2009 and 2010.
• From the 47 samples collected, they found that 19 of them tested positive for rotavirus.
• Further testing revealed that in these 19 positive cases, the G type was present in all 19 samples, and the P type was found in 17 of the samples.

Consistent Strain of Virus

• The results suggested that the same strain of virus, which presented a G14 VP7 in combination with a P[12] VP4, was persisting in the stud farm for at least two consecutive winter periods.
• By studying the sequence analysis of the genes encoding the outer capsid rotavirus proteins VP7 and VP4, researchers concluded that the persistent virus strain had a strong genetic relationship with strains recently isolated in other parts of Europe.

Implications and Future Directions

• By identifying the genetic makeup of the persistent strain, this research can help in understanding the spread and contagion of the rotavirus in equine populations.
• The findings of the research may serve as an important reference for designing effective prevention and control measures for rotavirus outbreaks in stud farms specifically and for equine populations in general.