Jr. Lawson, HYDATID-DISEASE AND SHEEP MEASLES - THE HISTORY OF THEIR CONTROL AND THE ECONOMICS OF A RECENT CHANGE OF CONTROL POLICY, New Zealand journal of zoology, 21(1), 1994, pp. 83-89
At the beginning of this century Echinococcus granulosus was a serious
problem for human health and sheep production in New Zealand. In 1959
an official control campaign was introduced to control E. granulosus
and Taenia hydatigena and in 1970 the control of Taenia ovis was added
. From 1972 this campaign included a policy of 6-weekly dog dosing. In
itially this policy was successful against both parasites. However, fr
om about 1976, the prevalence of T.ovis in lambs and dogs began to inc
rease again. In the late 1980s, the control authority decided to uncou
ple the combined programme. Six-weekly dosing was retained only for do
gs considered to be at risk of infection with E. granulosus. A serolog
ical test was introduced to give information on infection of dogs by T
. ovis. The economic losses due to these parasites, the costs of contr
olling them, and the effect of the recent change in control policy are
examined.