[Investigations into the incidence of the various causative agents of mastitis in cattle. Studies done in the ambulatory clinic of the Faculty of Veterinary Medicine, Utrecht]. / Een onderzoek naar de frequentie van voorkomen van de verschillende mastitisverwekkers bij het rund. Een onderzoek in de buitenpraktijk van de Faculteit der Diergeneeskunde, Utrecht.

The clinical and bacteriological findings in every head of cattle treated for clinical mastitis in the Ambulatory Clinic of the Veterinary Faculty of Utrecht University were recorded over a period of twelve months. Cattle affected with mastitis were classified into a number of groups, a classification based on the clinical symptoms shown by the animals. In each of these groups the incidence of the various causative agents of mastitis was determined. Another subject of study was the distribution of the causative agents over the various groups. The high proportion (34 percent) of coliform micro-organisms, isolated from animals affected with acute mastitis and showing symptoms of generalized disease was a striking feature.