Microorganisms and Disease
Prontosil is

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
an effective antibacterial when used in in-vitro cultures

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Microorganisms and Disease
The "A" subunit of diphtheria toxin

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

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