Systematic Veterinary Virology

PRODROMAL FEVER

• The onset of the prodromal fever is sudden, it is frequently missed because other clinical signs are minimal, except in lactating cows where there is drop in milk yield.
• Typical illness is clearly evident 24 to 48 hours later, when the animal becomes restless and then stands depressed, apart and alone. Respirations are shallow and rapid.
• The coat hairs stand erect, the muzzle dries, tears are wept and the nose runs. Appetite is impaired, rumination is retarded and defecation stops. Visible mucous membranes are congested but intact.