Typhus
The word typhus comes from the Greek term meaning hazy or smoky, a description of the delirious state of mind experienced by those infected. This single name covers three distinct diseases caused by different bacteria and spread by different insects. Epidemic typhus is caused by Rickettsia prowazekii and travels through body lice. Scrub typhus stems from Orientia tsutsugamushi carried by chiggers found in vegetation. Murine typhus arises from Rickettsia typhi transmitted by fleas living on rats. These distinctions matter because each type requires specific prevention strategies and occurs in different environments.
Symptoms typically begin one to two weeks after exposure with sudden onset of fever and flu-like feelings. Five to nine days later, a rash appears on the trunk before spreading to the extremities. This rash eventually covers most of the body but spares the face, palms, and soles. Signs of meningoencephalitis emerge alongside the rash during the second or third week of illness. Patients may experience sensitivity to light, altered mental status known as delirium, or fall into a coma. Untreated cases often prove fatal, particularly for people over age 50 who face the highest risk of death.
The first reliable description of typhus appeared in 1489 AD during the Spanish siege of Baza against the Moors. During that conflict, Spaniards lost 3,000 men to enemy action but an additional 17,000 died of typhus. Typhus ravaged armies throughout history, including during Napoleon's retreat from Moscow in 1812 where more French soldiers died of the disease than were killed by Russians. In World War I, over 150,000 people died in Serbia alone while epidemics reached their peak in Soviet territory in 1922 with some 20 to 30 million cases in Russia. During World War II, many German prisoners of war after the loss at Stalingrad died of typhus.
In historical times jail fever was common in English prisons and is believed by modern authorities to have been typhus. It occurred when prisoners were crowded together into dark filthy rooms where lice spread easily. Imprisonment until the next term of court often equated to a death sentence because prisoners brought before the court sometimes infected members of the court. The Black Assize of Exeter in 1586 saw another notable outbreak. During the Lent assizes court held at Taunton in 1730 gaol fever caused the death of the Lord Chief Baron as well as the High Sheriff and hundreds of others. In London gaol fever frequently broke out among ill-kept prisoners of Newgate Prison then moved into the general city population.
According to the World Health Organization in 2010 the death rate from typhus was about one of every five million people per year. Only a few areas of epidemic typhus exist today with cases reported in Burundi Rwanda Ethiopia Algeria and parts of South and Central America. Except for two cases all instances of epidemic typhus in the United States have occurred east of the Mississippi River. An examination of a cluster of cases in Pennsylvania concluded the source of infection was flying squirrels. An outbreak of flea-borne murine typhus was identified in downtown Los Angeles California in October 2018. City attorney Elizabeth Greenwood revealed she was infected with typhus from a flea bite at her office in Los Angeles City Hall in 2019.
The main method of diagnosing typhus is laboratory testing most commonly done with an indirect immunofluorescence antibody test. This test checks a sample for antibodies associated with typhus though it can also be performed using immunohistochemistry or polymerase chain reaction tests excluding scrub typhus. As of 2025 no vaccine is commercially available but treatment relies on the antibiotic doxycycline. Without treatment death may occur in 10 to 60 percent of people with epidemic typhus. In one study of 60 people hospitalized with epidemic typhus no one died when given doxycycline or chloramphenicol.
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Common questions
What is the origin of the word typhus?
The word typhus comes from the Greek term meaning hazy or smoky, a description of the delirious state of mind experienced by those infected.
How many distinct types of typhus exist and what causes them?
Typhus covers three distinct diseases caused by different bacteria and spread by different insects. Epidemic typhus is caused by Rickettsia prowazekii and travels through body lice. Scrub typhus stems from Orientia tsutsugamushi carried by chiggers found in vegetation. Murine typhus arises from Rickettsia typhi transmitted by fleas living on rats.
When did the first reliable description of typhus appear?
The first reliable description of typhus appeared in 1489 AD during the Spanish siege of Baza against the Moors. During that conflict, Spaniards lost 3,000 men to enemy action but an additional 17,000 died of typhus.
Where have recent cases of epidemic typhus been reported today?
Only a few areas of epidemic typhus exist today with cases reported in Burundi Rwanda Ethiopia Algeria and parts of South and Central America. Except for two cases all instances of epidemic typhus in the United States have occurred east of the Mississippi River.
What treatment is used for typhus as of 2025?
As of 2025 no vaccine is commercially available but treatment relies on the antibiotic doxycycline. Without treatment death may occur in 10 to 60 percent of people with epidemic typhus.