The economic losses due to subclinical mange and round worm infections
in pigs in their full extension are poorly documented. Therefore, sto
re pigs weighing 25-26 kg of three weekly stablings comprising probabl
y 600 animals each were treated on arrival at a fattening unit with IV
OMEC(R) Pramix at a dose rate of 100 mcg/kg bwt. for seven consecutive
days. Each of the three weekly treatment group alternated with an unt
reated control group of the same size and the same origin. The fatteni
ng unit had a history of a low subclinical infestation with sarcoptic
mites and ascarids. The evaluation of productivity data and parasitolo
gical findings revealed a clear improvement of important parameters in
favour of the Premix group: sarcoptic mites in scrapings after slaugh
ter (%): Nil vs. 16,7; rate of milk spots (%): 0,8 vs. 4,8; pooled fae
cal samples positive for ascarid eggs (%): 4,4 vs. 8,8; animal losses
(%): 1,69 vs. 2,14; daily weight gain (g/d): 695 vs. 670; carcass weig
ht (kg): 91,9 vs. 89,3; feed intake (kg/d): 2,02 vs. 1,96: net profit
(DM): 8,51 vs. 5,33. These results show the considerable impact of a s
ubclinical parasitic infestation on the net profit.