. Similarly to the other reports in the literature regarding the relationship
between the biovars and the SEs produced (Isigidi et al., 1990;
Rosec et al., 1997), SEA and SEB, both alone or in association,
appear to be the SEs most frequently produced by the Human
biovar strains, while SEC is predominant in the Ovine biovars and
SED in the NHS biovars (Tables 2 and 3