Science and folk superstition

Science and folk superstition are not merely rival explanations of disease in this novel: they shape how people drink, treat patients, interpret epidemics, and organize public life. Through Juvenal Urbino’s work, scientific observation repeatedly confronts customs that feel authoritative because they are old, familiar, or bound to local identity. The conflict is not a simple passage from ignorance to enlightenment; it is a struggle over which kinds of knowledge can alter daily practice.

Medical knowledge against inherited practice

When Juvenal returns from Europe and takes over his father’s office, he brings the methods of the new French school into a city whose medical institutions resist change. At Hospital of Misericordia, colleagues maintain that beds should stand in pots of water to stop disease climbing their legs, and that evening clothes and chamois gloves belong in the operating room because elegance is treated as part of asepsis. They distrust his tasting a patient’s urine to detect sugar and his warnings about the risks of vaccines, even as they retain their own confidence in suppositories. His clinical methods therefore expose a contradiction: resistance to innovation coexists with faith in practices that have no comparable evidentiary basis.

This opposition makes scientific reform socially uncomfortable as well as technically difficult. Juvenal’s precision, civic-mindedness, and willingness to challenge entrenched ideas provoke resentment among senior colleagues and jokes among younger ones. His authority as a physician does not immediately persuade a community whose medical customs are woven into professional status and everyday assumptions. The novel presents knowledge as something that must be practiced amid institutional opposition, not simply possessed.

Water, folklore, and the limits of appearances

The struggle is especially vivid in the city’s water supply. Household cisterns and stone filters seem to offer clean, cool water, but Juvenal knows that waterworms survive at the bottom of the jars and pass through simple filters. As a child, he had shared the popular belief that these creatures were animes, supernatural beings associated with still water, courtship, and vengeance. He later learned that they were mosquito larvae. That correction did not make the earlier belief inconsequential: it showed him how easily an observation of nature could be absorbed into a supernatural account, and how scientific learning could reveal a practical danger concealed by that account.

The old explanations also attach social meaning to bodily conditions. Many men accept scrotal hernias, attributed to cistern water, with what the narrator describes as patriotic insolence; a conspicuous rupture can be treated as a mark of masculine honor rather than as a condition to prevent. When Juvenal returns from Europe, some residents resist enriching cistern water with minerals because they fear losing the supposed cause of this valued sign. The episode makes clear that facts alone cannot dislodge a belief that has become a source of pride.

Against this background, Juvenal presses for an aqueduct and safer disposal of sewage and refuse. The city’s polluted water, open defecation, and garbage-filled wetlands make sanitation a practical emergency, while the public market beside Las Ánimas Bay accumulates refuse and waste from the slaughterhouse. His proposals—to close the old sewers, redirect their contents away from the market cove, collect garbage regularly, and build a covered market—challenge not only infrastructure but a civic complacency that celebrates the city’s history while overlooking its deterioration.

Cholera: memory, diagnosis, and public response

Juvenal’s insistence on prevention is shaped by family history. His father, Marco Aurelio Urbino, was the distinguished physician who led public-health measures during an earlier cholera catastrophe and became one of its victims. Reviewing that epidemic later, Juvenal judges his father’s methods charitable but often unscientific and contrary to reason, in ways that helped the disease spread. He feels compassion for his father and regrets not having stood beside him in the solitude of his errors, while still recognizing his diligence, self-sacrifice, and courage. Scientific criticism does not erase filial regard; it makes the inheritance more complicated.

After his father’s death, Juvenal studies cholera intensely, as though rigorous knowledge might answer a loss that remains personally unresolved. He trains with Professor Adrien Proust, an epidemiologist associated with the creation of cordons sanitaires. Back home, the reeking market, rats in the sewers, and children playing in street puddles convince him that the conditions of the earlier disaster could produce another. The remembered epidemic is thus both a historical catastrophe and a warning read through the material surroundings of the present.

When a patient arrives at Hospital of Misericordia with an unusual blue coloration, Juvenal recognizes cholera and acts to contain its spread. The man has come from Curaçao aboard a schooner, and Juvenal alerts fellow doctors and authorities so the vessel can be located and quarantined. He also restrains a military commander who would revive the old response of firing a cannon every quarter hour, a practice grounded in the superstition that gunpowder purifies the air. Juvenal’s answer is pointedly practical: “Save that powder for when the Liberals come,” he says, rejecting the ritual as a substitute for medical control.

The first patient dies, but surveillance and targeted quarantine follow. When further suspected cases appear, the family of a five-year-old girl is separated and quarantined, and the neighborhood is placed under medical supervision; one child contracts cholera and recovers. More cases follow, including an alarming outbreak, but by the end of the year officials believe an epidemic has been averted. The crisis lends weight to Juvenal’s public warnings: medical instruction on cholera and yellow fever becomes compulsory at the Medical School, and authorities recognize the urgency of closing the sewers and moving the market away from the garbage dump. The disease remains endemic along the Caribbean coast and the Magdalena valley, but it does not again flare into an epidemic in the period described.

Diagnosis, discretion, and uncertainty

The novel also complicates the boundary between sound medical judgment and the management of what can be known. When Jeremiah de Saint-Amour dies from cyanide fumes, Juvenal concludes that the death was deliberate, not accidental, and considers the chemical evidence sufficient to dispense with an autopsy. His confident intervention illustrates the authority of professional diagnosis. Yet elsewhere, during cholera’s long presence along the river, health authorities oblige doctors to certify cases as common dysentery. The official label then obscures the very disease that medical practice is meant to identify.

These episodes place expertise within social and institutional limits. Juvenal’s evidence-based response can expose superstition and prompt reform, but diagnosis can also be suppressed or blurred by authority. The result is not a clean opposition between truth and falsehood: scientific knowledge depends on observation and public action, while its reach is vulnerable to custom, administrative convenience, and the unequal power to decide which account will be recorded.

From public health to private life

The contrast between scientific and popular explanations extends into personal relationships. Juvenal’s training has taught him the ethical management of forgetfulness: when Hildebranda mentions that Florentino Ariza was Fermina Daza’s sweetheart before her marriage, Juvenal fails to register the information and later erases Florentino from his memory. For Florentino, by contrast, the secret remains a burden guarded by only a few people, including Leona Cassiani. The same novel that follows medical efforts to recognize and contain disease therefore attends to what people remember, suppress, or fail to hear in intimate life.

In its final river journey, the story shows how medical categories can also be put to strategic use. Captain Samaritano explains that a cholera case aboard a ship would permit quarantine, the raising of the yellow flag, and travel under emergency conditions—an exception that could release a vessel from ordinary commitments. He adds that the flag has sometimes been used to evade taxes, avoid an unwanted passenger, or escape inspection. Cholera is at once a real danger and a potent administrative designation, capable of changing where a ship may go and what rules apply. Across the novel, science and superstition are therefore not abstract opposites: they meet in bodies, civic infrastructure, official records, and the practical decisions through which people try to protect themselves or secure room to act.