Microorganisms and Disease
Prontosil is

an effective antibacterial when used in in-vitro cultures
not used as an antibacterial agent
an effective antibacterial both in animals as well as in in-vitro cultures
an effective antibacterial when used in animals

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Microorganisms and Disease
The "A" subunit of diphtheria toxin

forms cAMP that leads to fluid accumulation
binds host cell receptors found on heart cells
lysis macrophages with the release of cytokines
cause ADP ribosylation of a factor involved in protein synthesis

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