Plot Analysis Summary
Koch pursues a physical explanation for tuberculosis while confronting grief, research obstacles, infection risks, and the uncertain judgment awaiting his lecture.
Story Structure — 4 Plot Phases
Grief and a Medical Vow
Koch encounters a family facing a child's tuberculosis and refuses to accept a supernatural explanation. Although he cannot save the child, the experience strengthens his resolve to find the disease's cause.
Key Events
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A Child Fades from Tuberculosis — Koch confronts the limits of medicine as Frau Göhrke's child is dying of tuberculosis. Characters: Dr. Robert Koch, Frau Göhrke
Location: Frau Göhrke's home
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A Mother's Anger at Medicine — Frau Göhrke blames doctors and their medicines for her child's suffering. Characters: Dr. Robert Koch, Frau Göhrke
Location: Frau Göhrke's home
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Koch Rejects Superstition — Koch rejects the claim that an evil force caused the illness and speaks compassionately to the family. Characters: Dr. Robert Koch, Frau Göhrke
Location: Frau Göhrke's home
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A Vow to Find the Cause — Unable to save the child, Koch vows to discover the physical cause of tuberculosis. Characters: Dr. Robert Koch
Location: Frau Göhrke's home
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Healers Return to the House — Healers return to drive out what they call Satan, and Koch and Löffler stand against them. Characters: Dr. Robert Koch, Kochs Assistent Dr. Friedrich Löffler
Location: Frau Göhrke's home
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Damaged Lung as Evidence — Koch shows the family damaged lung tissue and explains his belief in an invisible living cause. Characters: Dr. Robert Koch, Frau Göhrke, Kochs Assistent Dr. Friedrich Löffler
Location: Frau Göhrke's home
Research Against Obstacles
Koch works to make the suspected organism visible, but disputed expenses and delayed supplies impede his experiments. He continues treating patients, including Frau Paul, whose prescription he changes.
Key Events
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Damaged Lung as Evidence — Koch shows the family damaged lung tissue and explains his belief in an invisible living cause. Characters: Dr. Robert Koch, Frau Göhrke, Kochs Assistent Dr. Friedrich Löffler
Location: Frau Göhrke's home
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Experiments to Reveal the Organism — Koch repeatedly tests dyes in an effort to make the suspected organism visible in tissue. Characters: Dr. Robert Koch
Location: Koch's laboratory
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Supplies Delayed by Bureaucracy — A Rechnungsrat disputes expenses and delays supplies Koch needs for his research. Characters: Dr. Robert Koch
Location: Administrative office
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Koch Cares for Poor Patients — Koch treats patients who cannot afford proper care and helps one woman seek recovery in the mountains. Characters: Dr. Robert Koch
Location: Koch's medical practice
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A New Prescription for Frau Paul — After Frau Paul drinks her rubbing spirits, Koch gives her a different prescription. Characters: Dr. Robert Koch, Kochs Patientin Frau Paul
Location: Koch's medical practice
Risk in the Laboratory
Koch tests whether tuberculosis can spread through breathing and warns colleagues to take precautions. The risks become immediate when Löffler reveals that he is ill and has infected himself.
Key Events
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Testing Airborne Transmission — Koch tests whether tuberculosis spreads through breathing by exposing guinea pigs to bacilli. Characters: Dr. Robert Koch, Kochs Assistent Dr. Friedrich Löffler
Location: Koch's laboratory
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Warnings About Infection Risk — Koch warns colleagues to take precautions because the experiments may put people nearby at risk. Characters: Dr. Robert Koch, Kochs Assistent Dr. Friedrich Löffler
Location: Koch's laboratory
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Löffler Reveals His Illness — Shortly before the lecture, Löffler says he has been ill for weeks and infected himself. Characters: Dr. Robert Koch, Kochs Assistent Dr. Friedrich Löffler
Location: Before Koch's lecture
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Koch Arranges Löffler's Care — Koch arranges for Löffler to be taken to the Charité, with Schwester Else helping. Characters: Dr. Robert Koch, Kochs Assistent Dr. Friedrich Löffler, Schwester Else
Location: On the way to the Charité
An Unfinished Lecture
Koch arranges for Löffler to be taken to the Charité while his lecture approaches. Medical figures gather, and the audience awaits Virchow's judgment, but the excerpt ends before the lecture's reception is known.
Key Events
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The Lecture Draws Near — Koch's important lecture is about to begin while Löffler is being taken for care. Characters: Dr. Robert Koch
Location: Lecture venue
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Gaffky Arrives — Dr. Georg Gaffky arrives as the medical gathering forms for Koch's presentation. Characters: Dr. Robert Koch, Dr. Georg Gaffky
Location: Lecture venue
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Medical Figures Assemble — Prominent medical figures gather to hear Koch's findings. Characters: Dr. Robert Koch, Prof. Ernst von Bergmann, Dr. Georg Gaffky
Location: Lecture venue
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Virchow's Judgment Anticipated — The audience awaits Virchow's judgment of Koch's findings as the lecture is about to start. Characters: Dr. Robert Koch, Geheimrat Rudolf Virchow
Location: Lecture venue
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The Lecture Remains Unresolved — The excerpt ends as the lecture is about to start, leaving its reception and outcome unknown. Characters: Dr. Robert Koch, Geheimrat Rudolf Virchow, Dr. Georg Gaffky, Prof. Ernst von Bergmann
Location: Lecture venue