Selection for clean fleece weight, fertility and fleece rot in Austral
ian Merinos, bred in a relatively worm free environment, has not resul
ted in any apparent correlated responses in faecal egg count (FEC). Th
e Weaning Weight Plus line had a significantly lower FEC than the Minu
s line which suggests a favourable correlated response in FEC. Genetic
correlations between FEC and production traits were not significantly
different from zero.