Xenopsylla chepsis (oriental rat flea) engorged with blood
Xenopsylla chepsis (oriental rat flea) engorged with blood (magnified image)

The plague is primarily a disease of rodents which is transmitted to people through the bite of fleas that are normally parasitic on the rodents. When the original host dies the flees desperately seek new animal hosts - humans. The plague bacillus is extremely virulent. Laboratory mice die after being infected with just three bacilli - and fleas can disgorge up to 24,000 in one bite. Plague is a very severe disease in people, with death occurring in 50% to 60% of untreated cases.

The illness has been known of for over 3000 years and is often called The Black Death. This name was derived from the purple colour that all plague victims develop during their last hours which is caused by respiratory failure. Great pandemics have affected whole continents and wiped out whole village populations and decimated towns and cities. Thankfully there has not been an epidemic in the UK for hundreds of years but the plague is still endemic in many countries in Africa, the Americas and Asia. The annual average number of cases in recent years is 2,547 with 181 deaths with about three quarters of cases occurring in Africa.

Plague Spot near site of the London Gas Works, South Lambeth
Image Source : Lambeth Archives

Today if diagnosed in time most patients can survive if treated with antibiotics and other therapies, but this was not always the case. During the last plague epidemic (1664-1666) in excess of 68,000 people died in London. Vauxhall is known to have had its own plague pits and Kennington its plague houses. These houses were in Cumberland Row which was the short line of houses north of the Old Town Hall, Kennington Road. They were being built around 1666 and were called Plague Houses because victims of the Great Plague were laid out in the partially completed buildings.

Plague Houses Kennington Road c1860 Image Source : Lambeth Archives
The Plague Houses, Cumberland Row c1860.
Image Source : Lambeth Archives

There are three main forms of plague in humans: