[Nematodirus battus definitely established in the Netherlands (author's transl)].

After Nematodirus battus infection had been detected in sheep imported from Britain into the Netherlands in January 1978, Dutch lambs and sheep on seven farms in the Province of Gelderland were also found to be infected with N. battus later in 1978. The possible origin of the infection was investigated. Three flocks had been in contact with British sheep, two farms were trading farms, one farm had purchased its sheep from various sources a few years previously, on another the cause continued to be obscure, recently purchased rams possibly having played a role in this case. Severe infections were not (sor far) observed. It was difficult to differentiate between clinical symptoms of N. battus infection, if any, and those due to coccidiosis which was diagnosed in a number of flocks.