A 200-odd dairy herd in Inglewood is under strict quarantine following tuberculosis detected among the cows.
While investigating the source of the infection, the Animal Health Board (AHB) is taking immediate action to manage and control the disease on the property.
AHB Northern North Island regional co-ordinator Frank Pavitt says cattle can only move off the infected property with the AHB's permission. The infected herd will have regular TB tests and the AHB will ensure all neighbouring herds have had a recent test, or will have one later this year.
"There are a number of possible sources of the disease and at this early stage of the investigation no cause is being ruled out," says Frank.
The Taranaki region has two bovine TB-infected herds. The second is in south Taranaki after a cluster of herds tested positive to the disease in 2009. It is potentially close to being declared free of infection.