Rotaviral and coronaviral diarrhea

Area of Science:

• Veterinary Virology
• Neonatal Pathology
• Gastroenterology

Background:

• Neonatal calf diarrhea is a significant economic and health concern in cattle farming.
• Rotaviruses and coronaviruses are the most prevalent viral agents responsible for calfhood diarrhea worldwide.
• These viral infections can lead to severe intestinal damage, malabsorption, and variable mortality rates, often exacerbated by secondary bacterial infections and electrolyte imbalances.

Purpose of the Study:

• To review the primary viral pathogens causing neonatal calf diarrhea.
• To describe the pathogenesis and clinical manifestations of rotavirus and coronavirus infections in calves.
• To highlight diagnostic approaches for identifying viral etiologies of calf diarrhea.

Main Methods:

• Literature review of viral pathogens in neonatal calf diarrhea.
• Description of rotavirus and coronavirus pathogenesis, clinical signs, and diagnostic methods.
• Emphasis on laboratory diagnostic techniques such as electron microscopy and enzyme immunoassays.

Main Results:

• Rotaviruses cause high-morbidity diarrhea in calves under 10 days, leading to villous atrophy and malabsorption.
• Coronaviruses affect both small and large intestines in calves under 20 days, causing severe damage and potential death.
• Electron microscopy and antigen-detection assays are effective for diagnosing viral diarrhea in fecal samples.

Conclusions:

• Rotaviruses and coronaviruses are key viral pathogens in neonatal calf diarrhea.
• Accurate etiologic diagnosis requires laboratory support, with fecal sample analysis being critical.
• Understanding viral pathogenesis aids in managing and preventing calf diarrhea outbreaks.