Following a short incubation period (1-7 days) the patient develops a high fever and a severe blood infection, with a very high death toll, which remains substantial even if appropriate antibiotic therapy is administered.
Po kratki inkubacijski dobi (1– 7 dni) se pri bolniku pojavi močno povišana telesna temperatura in huda okužba krvi z zelo visokim številom smrtnih primerov, ki ostane dokaj visoko tudi v primeru ustreznega zdravljenja z antibiotiki.