The number of flea-born Typhus cases in Los Angeles has hit 107.
So far this year 72 patients have been recorded by Los Angeles County Department of Public Health with a further 15 in Long Beach and 20 in Pasadena.
In the 2000s there were around 20 cases recorded per year and analysts are putting the dramatic rise down to a 47 per cent increase in homelessness since 2012.
One official in Long Beach told NBC News that almost half a million potential cases are ‘under investigation.’
At the start of this month, Pasadena, a city in the north of the county and home to around 135,000 people, reported epidemic levels of typhus fever.
But no new cases have been reported there since October 5.
Flea-borne typhus occurs when faeces from an infected insect come into contact with a person’s cut or gets rubbed into their eyes.
These fleas often live on feral cats and rats who are attracted to areas with trash on the streets.
Most sufferers endure headache, fever and rash, however, in severe cases, typhus can lead to life-threatening hepatitis and internal bleeding.