Rotavirus diarrhoea of foals.

This research article investigates the role of rotaviruses, often associated with diarrhoea in many animals and human infants, in causing diarrhoea in foals. The study collected samples from several foals experiencing diarrhoea, cultured and examined the samples, detecting rotaviruses in the majority of samples.

Key Findings

• Out of 14 samples collected from horses with diarrhoea, seven were from foals on a farm in northern Tasmania which had experienced a severe outbreak of diarrhoea, affecting nearly all of its 25 foals. Two of these foals died, one from an unrelated abdominal complication while the other became comatose. Other foals responded well to treatments such as intravenous saline, ampicillin, and antispasmodic drugs.
• Researchers identified rotaviruses in six of the seven samples from the Tasmania farm. These viruses, known to cause diarrhoea in various species, measured about 69 nm in diameter, consistent with characteristics of rotaviruses.
• No viruses were found in one sample from the same farm, nor in any of the samples from older horses or isolated cases of diarrhoea. This could imply that the rotavirus is mainly affecting foals in certain environment.

Methods and Technical details

• Collected fecal samples were stored at -70 degrees Celsius and held up to two years before examination. Handling included creating a suspension in distilled water, centrifugation, and negative staining. Diameter of the identified viruses was measured using catalase crystals as an internal standard.
• The 11 RNA segments of the foal rotavirus genome were found to band in a polyacrylamide gel, a method for studying nucleic acids and proteins. Cross-reacting antigens with rotaviruses from other species were not tested for in this study.

Significance and Implications

• Research findings suggest a further investigation into the role of rotaviruses in causing diarrhoea in foals, which could possibly provide better insight into prevention and treatment strategies. Allowing for healthier animals and may help lower mortality rates.
• These findings also provide evidence that rotaviruses could be species-specific or age-specific, since older horses and isolated cases did not show presence of the virus.
• The methodology used in the study, including the long-term storage and handling of samples for research, could be of significance for other researchers seeking reliable methods.