The treatment of oestrinosis and hypodermosis in red deer (Cervus elaphus hippelaphus) and roe deer (Capreolus c. capreolus) by means of ivermectin (Ivomec®)

In two test areas in Austria (Burgenland, Lower Austria) ivermectin has been used to control oestrinosis and hypodermosis in red- and roe deer since many years (1985 and 1987, respectively). The results until 1992, using the injectable solution Ivomec(R)-injection 1 % only, have been reported (Kutzer, 1994). In continuation of these tests Ivomec(R)-Praemix 0.6 % was examined and it turned out that the treatment was extremely successful. In practice Ivomec(R)-Praemix 0.6 % has to be given preference due to its stability. The most favourable dosage for red- and roe deer was 2 x 0.4 mg ivermectin/kg bodyweight administered at an interval of one week, although equally good results could be obtained with 1 x 0.3-0.4 mg ivermectin/kg bodyweight. With the above mentioned dosages against Pharyngomyia picta and Cephenemyia stimulator an up to 100 % and against Hypoderma actaeon a 100 % success of treatment could be achieved. The administration in two doses has the advantage to eradicate intestinal and lung nematodes at the same time if there are any. Finally, it was found that the controlling measures should not be interrupted for more than one year, if no treatment was done in the neighbouring hunting grounds.