[Clumping-factor-reactions of Staphylococcus aureus of different origin in plasma- and fibrinogen-preparations(author's transl)].

The clumping-factor (CF) test in microtiter-plates proved suitable for the preliminary identification of Staphylococcus aureus, provided a "susceptible" plasma- or fibrinogen-preparation had been applied (Table 1). Thus, all of 100 S. aureus-cultures from humans gave strongly positive CF-reactions with plasma from humans, rabbits, pigs, cattle, and dogs as well as with fibrinogen-solutions from humans and cattle. Equally, all of 100 S. aureus-cultures from cattle clumped in plasma from pigs, cattle and humans. All of the 50 S. aureus-cultures from dogs were CF-positive in plasma from dogs, humans and horses. Only part of the CF-positive S. aureus-culture reacted with plasma from sheep and goats.