Experimental superinfection of a Lesser Malayan mousedeer (Tragulus javanicus) persistently infected with bovine viral diarrhea virus.

A Lesser Malayan mousedeer (Tragulus javanicus), persistently infected with noncytopathogenic bovine viral diarrhea virus (BVDV) type 1f, was experimentally superinfected with a cytopathogenic isolate of BVDV type 1c, which antigenically partially matched the endogenous strain. Within the observational period of 125 days after superinfection, the animal did not demonstrate any clinical signs of the disease and/or significant changes in blood values. Neutralizing antibodies were detected at 35 and 42 days postinfection.

[Case report: lymphosarcoma in a cow].

A case of sporadic lymphosarcoma in a cow is described. The animal showed a tumorous mass in the area of the right orbita accompanied by conjunctival oedema. Clinical investigation showed an enlargement of a number of internal and external lymph nodes.

[Structures and possibilities of herd management on the example of respiratory enzootic infection of calves].

With the keeping of cattle in bigger herds problems arise, which require a modified veterinary approach. In stead of and in addition to the treatment of individual animals improvement of hygiene, intensification of prophylaxis, fast recognition (herd diagnostics) and interregional comparability have to be established. Beside the conventional field veterinarian, who is consulted on request primarily for the treatment of single animals, specialists in team practices as an alternative, permanently employed veterinarians or firm contracts with a health service up to integrated herd control are thinkable.

[Effect of antibody-containing egg powder on development of active immunity in calves].

Investigations on the influence of an egg powder containing antibodies was conducted on 15 young calves to measure the development of an active immune response. The product investigated, Globigen 88 (Lohmann Animal Health GmbH & Co. KG), was mixed with a milk replacer and administered to a group of 5 calves over 8 days twice a day.

[Practice-oriented control of BVD virus infection in cattle herds].

The BVD-virus-infection is at present the economically most important disease of bovine animals. A control program requires to take into consideration the given epidemiological facts. Sufficient diagnostic examination procedures are available for estimation of the infection taking place in a herd.