The pathogens described are:
Pathogenic bacteria:
Enterovirulent Escherichia coli group (EEC Group)
Parasitic protozoa and worms
Viruses
Natural toxins
Other pathogenic agents
External links:
... of Dolly's sister Katarina (Kitty) whom he has previously been courting. As the novel opens, Stiva's friend Levin has returned Moscow from his country estate wi ...