New research has finally established the cause of a plague in Glasgow nearly 120 years ago.
The team at the University of Oslo said that the rats are wrongly guilty, and the real culprits are people.
The plague was hit by Glasgow in August 1900, with initial cases in the middle of the burnished and unhygienic properties of Gorbals.
The epidemic was part of the third pandemic pandemic, which began in 1855 and was not proclaimed until 1960.
It was easy to break
The first pandemic was the Justinian plague, the second was the black death in the 1300s.
The third pandemic killed millions of people, mostly in China and India.
With these terrible gauges, Glasgow has relactively moved from 35 infected people and 16 killed.
Drastic measures have been taken to stop the outbreak of the disease.
There was a call to disinfect trams, trains, even coins and hundreds of rats killed by a small exterminator army.
The killing of a rat at that time was a modern solution.
Just two years earlier, French researcher Paul-Louis Simond showed that rat fleas can transfer the Yersinia pestis bacterium.
Public health in Glasgow had doubts and suspected that it was carried by suspicious people, not rodents.
They did not find evidence of a spider in the rat population, concluding that the disease could be spread directly between humans, probably because of what they almost poetically described as "offensive parasites of mankind."
Now, 119 years later, a study from Oslo, published in the Royal Society Open Science magazine, concludes that the contagion has indeed spread through human contact.
Principal author Katharine Dean and her colleagues from the University's Ecological and Evolutionary Synthesis Center said they managed to come to a conclusion thanks to the pedantic records that were run by sanitary authorities at the time.
In 1900, authorities noticed that almost all cases could be related to the contact with the previous one.
Despite the capture of hundreds of rats, who were abundant in the neighborhoods, did not find traces of rodent outbreaks.
The City Health Officer immediately opened an investigation into the spread of the disease.
It was established on August 3, 1900 as Dan Zero, noting that "Mrs. B, the fishwormfish" became the first to become ill, along with his grandson.
The authorities then asked for people associated with Mrs. B or who were attending her funeral guard.
This led to quarantining more than 100 people in the "reception house" for observation.
With the support of the Catholic Church, they are forbidden to be wounded after the death of the plague.
New research has used modern methods to expand historical data, revealing a high rate of secondary infections in households.
The incubation period for each infection also indicated a person-to-person transmission.
The authors say their findings gave an important insight into the epidemiology of bubonic plague epidemics during the third pandemic in Europe.
They have also confirmed what officials have suspected so many years ago: rats in Glasgow made a mistake.