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Updated: Aug 18, 2026

Invasion of Human Cells by a Bacterial Pathogen
Published on: March 21, 2011
[Clumping-factor-reactions of Staphylococcus aureus of different origin in plasma- and
Abstract:
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.
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