Figure 1

Distribution throughout Sweden of organic sheep farms involved in the study (1997–1999 incl.). Each circle represents one farm (closed circle – farms where H. contortus was detected; open circle – farms where no H. contortus was found).

Lindqvist et al. Acta Veterinaria Scandinavica 2001 42:377 doi:10.1186/1751-0147-42-377

Figure 1.