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How is typhus transmitted

Typhus fevers are a group of diseases caused by bacteria that are spread to humans by fleas, lice, and chiggers. Typhus fevers include scrub typhus, murine typhus, and epidemic typhus. Chiggers spread scrub typhus, fleas spread murine typhus, and body lice spread epidemic typhus. The most common symptoms are fever, headaches, and sometimes rash Typhus is a disease caused by infection with one or more rickettsial bacteria. Fleas, mites (chiggers), lice, or ticks transmit it when they bite you. Fleas, mites, lice, and ticks are types of.. The disease is transmitted by the human body louse, which becomes infected by feeding on the blood of patients with acute typhus fever. Infected lice excrete rickettsia onto the skin while feeding on a second host, who becomes infected by rubbing louse faecal matter or crushed lice into the bite wound How is typhoid fever spread? The S. typhi bacterium lives only in humans and is spread through contaminated food and water. As a result, typhoid fever is more common in areas that don't have.. Epidemic typhus is a kind of fever spread by lice found on human body called Pediculus humanus corporis. It is also found to be transmitted by fleas. In history, this disease was commonly spread after a war or after a natural disaster. This article discusses about how epidemic typhus spreads and what is the incubation period of epidemic typhus

Typhus Fevers Typhus Fevers CD

  1. Scrub typhus can be transmitted by many species of trombiculid mites encountered in high grass and brush and is endemic to northern Japan, Southeast Asia, Indonesia, eastern Australia, China, several parts of south-central Russia, India, and Sri Lanka; rare cases have been reported from the United Arab Emirates and Chile
  2. Epidemic typhus is due to Rickettsia prowazekii spread by body lice, scrub typhus is due to Orientia tsutsugamushi spread by chiggers, and murine typhus is due to Rickettsia typhi spread by fleas. Vaccines have been developed, but none are commercially available. Prevention is achieved by reducing exposure to the organisms that spread the disease
  3. Murine typhus is passed by fleas to people if the fleas bite infected animals, mainly rats. Most U.S. cases have been reported in California, Hawaii, and Texas. Epidemic typhus is a rare variety..
  4. Typhus (actually not one illness but a group of closely related diseases) is caused by different species of rickettsia bacteria that are transmitted to humans by lice, fleas, mites, or ticks. The insects are carried person to person or are brought to people by rodents, cattle, and other animals
  5. Most people in developed countries pick up typhoid bacteria while they're traveling. Once they have been infected, they can spread it to others through the fecal-oral route. This means that Salmonella typhi is passed in the feces and sometimes in the urine of infected people
  6. Typhus is a bacterial disease spread by lice or fleas. Causes. Typhus is caused by two types of bacteria: Rickettsia typhi or Rickettsia prowazekii. Rickettsia typhi causes endemic or murine typhus. Endemic typhus is uncommon in the United States. It is usually seen in areas where hygiene is poor, and the temperature is cold

Rickettsia typhi and, occasionally, R. felis cause endemic typhus and are transmitted to humans by vectors such as lice (mainly epidemic) and fleas (mainly endemic) Typhus fevers are a group of diseases caused by bacteria that are spread to humans by fleas, lice, and chiggers. Typhus fevers include scrub typhus, murine typhus, and epidemic typhus. Chiggers spread scrub typhus, fleas spread murine typhus, and body lice spread epidemic typhus Typhus has a long and deadly history, especially epidemic typhus. Typhus is caused by bacteria. Rickettsia prowazekii causes epidemic typhus. Rickettsia typhi and, occasionally, R. felis cause endemic typhus and are transmitted to humans by vectors such as lice (mainly epidemic) and fleas (mainly endemic)

Typhus: Causes, Symptoms, and Diagnosi

Typhus is an infection spread by lice, fleas or mites. It's found in many countries, but is very rare in the UK. It can be serious, but most people make a full recovery if treated quickly. How you get typhus Epidemic typhus is one of the oldest-known vector-borne human diseases. It is caused by Rickettsia prowazekii and is transmitted to humans, its main reservoir, by Pediculus humanus, the human body louse. However, flying squirrels and ticks may also play a role in the disease epidemiology Typhus Symptoms and Spread. Typhus victims experience nausea, fever and rash, progressive delirium and stupor, gangrenous sores, severe headaches and a piercing sensitivity to light. The name typhus comes from the ancient Greek word Typhos, meaning smoky or lazy, which describes the state of mind of those afflicted by the disease Typhus is a bacterial infection transmitted through infected body lice, while typhoid is a food-borne bacterial infection affecting the intestines. The similarity in their names was due to the fact.. The typhus germ is transmitted by the bite of the body louse; so the disease was directly connected with filth and overcrowded unwashed clothes and shared beds. In various circumstances it was called 'putrid fever', 'ship fever', 'jail fever' and 'camp fever' and was particularly virulent in cold weather, when poorer people would tend to wear.

WHO Typhus fever (Epidemic louse-borne typhus

  1. Louse-borne typhus (epidemic typhus or exanthematic typhus) is a vector-borne disease caused by Rickettsia prowazekii and transmitted through infected faeces of the body louse Pediculus humanus humanus. Louse-borne typhus is responsible for large epidemics in populations with poor sanitary and overcrowded conditions
  2. The main offending organism which causes Epidemic Typhus or Brill-Zinsser Disease is Rickettsia Prowazekii which is transmitted to a human by a human body louse feeding on a dead body which carries this bacterium and infects the louse. This bacterium then grows in the stomach of the louse and is excreted through the feces
  3. This rickettsial infection is transmitted to humans through the bite of infected Leptotombidium mite larvae (chiggers). The mites are found in grasslands, forests, bush areas, wood piles, gardens, and beaches. Scrub Typhus can also be transmitted through unscreened blood transfusions and unhygienic needles
  4. Disease is spread by human body lice infected with the bacteria that cause epidemic typhus fever. The disease is most common during the winter, when conditions favor person-to-person spread of body lice. Human body lice become infected when they feed on the blood of a person with epidemic typhus fever. Infected lice then pass infectious feces.
  5. Also known as typhus fever, typhus is a cluster of infectious [1] diseases which include, epidemic typhus, murine typhus, and scrub typhus. The infection is spread through the arthropods, that is, invertebrate animals such as mites, lice, or ticks transmit the bacteria through biting
  6. Epidemic typhus is spread via lice. The lice carry the bacterium Rickettsia prowazekii. Historically, epidemic typhus emerged during or following major periods of war
  7. ated food and through direct contact with someone who is infected. Typhoid carriers. Even after antibiotic treatment, a small number of people who recover from typhoid fever continue to harbor the bacteria. These people, known as chronic carriers, no longer have signs or symptoms of the disease.

Epidemic typhus - spread by body lice; The incubation period for typhus is around 1 - 2 weeks. What is a murine typhus fever? Murine typhus is a disease caused by bacteria called Rickettsia typhi. It is also called endemic typhus or flea-borne typhus. The name murine means rats. So the main mammal host of murine typhus fevers are rats In 1909, epidemic typhus was found to be transmitted by Pediculus humanus humanus, the body louse, by Charles Nicolle, and he received a Nobel Prize in 1928 for his findings. Nicolle was able to transmit the typhus from humans to chimpanzees and then to macaques through blood transmission and, finally, from macaque to macaque via a body louse

Is Typhoid Fever Contagious? What You Need to Kno

louse-borne typhus. The mechanism by which R. prowazekii is transmitted from flying squirrels to humans is less well understood. Various routes have been hypothe-sized, but none have been empirically established. Plausible mechanisms include inhalation or direct intro-duction (through mucous membrane or dermal abrasion Typhus is an umbrella term used to describe a variety of conditions caused by bacteria in the Rickettsiae genus. Although there are several forms, the main types are epidemic typhus, Brill-Zinsser disease, murine or endemic typhus, and scrub typhus. Every form is passed on to humans through infected insects Epidemic typhus, also called louse-borne typhus, is an uncommon disease caused by a bacteria called Rickettsia prowazekii.Epidemic typhus is spread to people through contact with infected body lice.Though epidemic typhus was responsible for millions of deaths in previous centuries, it is now considered a rare disease. Occasionally, cases continue to occur, in areas where extreme overcrowding. Typhus, also known as typhus fever, are infectious diseases caused by the bacteria Rickettsia typhi and Rickettsia prowazekii. The condition occurs when the bacteria is transferred to humans via vectors such as fleas or lice that acquired it from animals like rats, opossums, cats, and raccoons

Murine Typhus . Murine typhus, also known as endemic typhus, Mexican typhus, and flea-borne typhus, is a flea-borne infection of humans worldwide. Symptoms are similar to those of epidemic typhus fever (transmitted by the human body louse), but typically much less severe In the case of typhus, the endemic version is generally less serious than the epidemic one. Murine or endemic typhus is caused by Rickettsia typhi. The bacterium is transmitted by fleas that have fed on infected rats. In the United States, fleas on opossums and cats also play a role in transmitting the disease On typhus symptoms, and how it spread . Typhus would begin with a terrible headache and back pains, leading to fever, vomiting, nausea, diarrhea; and around the time the fever began, there would. Reflecting common themes in Nazi propaganda, these medical professionals repeatedly pushed the false claim that Jews were especially responsible for outbreaks of typhus—a deadly contagious disease spread by lice. 2. The Nazi propaganda poster featured here was created in 1941 for public display in German-occupied Poland Mary Mallon (September 23, 1869-November 11, 1938), known as Typhoid Mary, was the cause of several typhoid outbreaks.Since Mary was the first healthy carrier of typhoid fever recognized in the United States, she did not understand how someone not sick could spread disease—so she tried to fight back

How Does Epidemic Typhus Spread & What Is The Incubation

How does Epidemic Typhus spread? Rickettsia prowazekii hides in the body and years later when the hosts immune system is lowered, it reactivates. Brill-Zinsser Disease. How does the Irish Potato Famine of 1845-1849 relate to the spread of Typhus Typhus is a bacterial disease spread by lice, in contrast to COVID-19, which spreads mainly from person to person, typically through respiratory droplets from coughing, sneezing, or talking. The.

TYPHUS. Typhoid fever is a highly infectious disease spread by unsanitary conditions, either person to person or through contaminated food or water. The symptoms begin suddenly with headache, loss of appetite, and vomiting Typhus, an often-fatal bacterial disease that is spread by body lice, swept through Europe during the second world war. Nazi propaganda portrayed Jews as major spreaders of the disease as a way of. A flea is seen in a file photo. (iStock/Getty Images Plus) Long Beach is experiencing a significant increase in the spread of typhus for the first half of 2021, more than doubling the. typhus: [noun] any of various bacterial diseases caused by rickettsias: such as. a severe human febrile disease that is caused by one (Rickettsia prowazekii) transmitted especially by body lice and is marked by high fever, stupor alternating with delirium, intense headache, and a dark red rash. murine typhus. scrub typhus

Rickettsial Diseases (Including Spotted Fever & Typhus

Typhus has an extended and lethal historical past, particularly epidemic typhus. Typhus is attributable to micro organism. Rickettsia prowazekii causes epidemic typhus. Rickettsia typhi and, sometimes, R. felis trigger endemic typhus and are transmitted to people by vectors comparable to lice (primarily epidemic) and fleas (primarily endemic) Epidemic typhus (lice-borne typhus) Brill-Zinsser disease (a recurrence of epidemic typhus, sometimes years after the first infection) Rickettsia prowazekii , transmitted by lice or by unknown methods when the hosts are flying squirrel Typhus Definition Several different illnesses are called typhus, all of them caused by one of the bacteria in the family Rickettsiae. Each illness occurs when the bacteria is passed to a human through contact with an infected insect. Description The four main types of typhus are: epidemic typhus Brill-Zinsser disease endemic or murine typhus scrub. Murine typhus is primarily transmitted by the rat flea, Xenopsylla cheopis. Additional vectors include the cat flea, Ctenocephalides felis , and the mouse flea, Leptopsyllia segnis . Fleas remain permanently infected with R. typhi , and their lifespan is not shortened by the presence of rickettsiae Epidemic typhus is caused by infection with Rickettsia prowazekii, which is carried and transmitted by body lice. Thus, it is a disease typically associated with war, famine, and other such events that cause personal hygiene to suffer and lice infestation to become prevalent. Historic reports of the disease date back to the Peloponnesian War.

Typhus is caused by the rickettsia bacteria, affects both dogs and humans, and is spread primarily through fleas, ticks or body lice. The blood-sucking vectors deposit feces on the skin of their host as they feed, where it's transmitted to the bloodstream through scratching or other direct contact Sylvatic typhus. Sylvatic typhus is a rare and milder form of epidemic typhus occurring the eastern United States. The infection is associated with close contact with flying squirrels, although the mode of transmission is not yet clear. Murine typhus. Murine typhus is caused by R. typhi and is distributed worldwide Scrub Typhus Definition. Scrub typhus is an infectious disease that is transmitted to humans from field mice and rats through the bite of mites that live on the animals. The main symptoms of the disease are fever, a wound at the site of the bite, a spotted rash on the trunk, and swelling of the lymph glands.. Description. Scrub typhus is caused by Rickettsia tsutsugamushi, a tiny parasite. Rickettsia typhi causes endemic typhus and is transmitted by fleas. The term endemic refers to the fact that there is an animal reservoir of disease maintaining the presence of typhus in a particular area. Rickettsia felis is found in cats and has also been linked to endemic typhus Louse-borne relapsing fever is a disease transmitted by the body louse, it can be severe. Currently the disease is primarily found in north-eastern Africa. In the end of 2015, cases were reported in the EU, among refugees from the countries of the Horn of Africa

Scrub typhus is a mite-borne, acute febrile illness caused by the bacterium Orientia tsutsugamushi . It is a re-emerging infectious disease of the tsutsugamushi triangle. Scrub typhus is transmitted through bites of contaminated chiggers (larval stage). Diagnosis of scrub typhus is challenging murine typhus.35 Given the clinical similarities, some authors believe that previously reported outbreaks of murine typhus infections may have been caused by the more recently recog-nized R. felis.12 R. helvetica is transmitted by Ixodes spp., and clinical cases of infection have been reported in Thailand, along the Thailand typhus rely on the body louse to spread. Because lice thrive wherever people are crammed together under unsanitary conditions, typhus became a threat to armies and refugees alike during World War II. The Fantastic Laboratory of Dr. Weigl. - Free Online Library The Fantastic Page 24/2

Start studying microbiology nccc fronzack lecture 3. Learn vocabulary, terms, and more with flashcards, games, and other study tools R. prowazekii is not transmitted from person to person. Patients can infect lice while the fever is present and may continue to be infectious for another 2 to 3 days. Patients with Brill-Zinsser disease are also infectious for lice. Diagnostic Tests. Epidemic typhus is usually diagnosed by serology; a fourfold rise in titer is diagnostic Flea-borne typhus (also called murine typhus) is caused by the bacteria (Rickettsia typhi) and is transmitted by infected fleas, which enter the skin through scratching following a bite or an any cuts or scrapes. Infected fleas can be carried by rats, domestic or feral cats, dogs, raccoons and opossums Rickettsia typhi causes endemic typhus, also known as murine typhus, and is the least virulent. Spread to humans by fleas on animals such as cats, opossums, raccoons, and rats, most notably from the Norway rat, victims of endemic typhus will experience a bodily rash, high fever, nausea, vomiting, discomfort, and diarrhea

Had typhus spread to France The Great War might have ended quite differently. Typhus Louse Shaking Hands With Death. To get a feeling for this paradox one must consider the plight of Russia. By 1917 it was a disorganized country with a failed military. Russia was torn apart by typhoid, cholera, dysentery, famine, and the socialist revolution Murine typhus comes from the Rickettsia typhi bacterium, which is spread by fleas that jump from wild animals to pets to humans. As Bill Jones and his wife Kathy Murray of Austin found out in 2008, getting sick with murine typhus can be scary business. When a high fever persisted for five days, Jones sought help at a local hospital Epidemic typhus, however, can be spread from person-to-person. Both types of typhus outbreaks occur mainly in areas with large populations of homeless people, says Dr. Hanrahan Flea-borne typhus is carried by infected fleas and is transmitted to humans after they scratch an itchy flea bite and inadvertently rub bacteria-laden flea feces into the wound. Not surprisingly, flea-borne typhus is typically associated with rat-infested sites in areas of the developing world

Typhus - Wikipedi

Typhus is a serious infectious disease which can be caused by two types of bacteria: Rickettsia typhi and Rickettsia prowazekii. It is a disease which rats can transfer to humans that can be best avoided by engaing in proper hygiene routines. At present, two types of typhus are known: Endemic typhus: transmitted by both types of typhus bacteria Typhus is a bacterial infection that can cause a high fever, stomach pain, and chills but can be treated with antibiotics. Outbreaks are more common in overcrowded and trash-filled areas that. Scrub typhus is a mite-borne disease caused by Orientia tsutsugamushi (formerly Rickettsia tsutsugamushi ). Symptoms are fever, a primary lesion, a macular rash, and lymphadenopathy. (See also Overview of Rickettsial and Related Infections .) Scrub typhus is related to rickettsial diseases. O. tsutsugamushi is transmitted by trombiculid mite. Typhus is a bacterium (Rickettsia prowazekii) spread by its vector, the human body louse (Pediculus humanus humanus). The latter multiply prolifically under conditions of poor hygiene, filth, overcrowding, and cold weather—exactly the conditions of the ghetto (section SM2) ( 23 , 24 ) Murine typhus is an endemic infectious disease caused by Rickettsia typhi and is transmitted by fleas. It typically causes a mild illness with symptoms of fever, rash, headache, chills, and non-specific gastrointestinal complaints. However, there have been no reported cases in the literature of muri

Typhus: Symptoms, Causes, Diagnosis, Treatment, Preventio

Typhus (Flea-borne) Flea-borne typhus is a disease caused by Rickettsia typhi bacteria that are spread by fleas. Human cases of flea-borne typhus are reported worldwide, but mainly in tropical and coastal areas. In the United States, most cases occur in Texas, California, and Hawaii, with an average of about 300 cases every year Pathophysiology. Epidemic typhus is the prototypical infection of the typhus group of diseases, and the pathophysiology of this illness is representative of the entire category. The arthropod vector of epidemic typhus is the body louse ( Pediculus corporis ). This is the only vector of the typhus group in which humans are the usual host Rocky Mountain Spotted Fever (tick-borne typhus fever) Last Reviewed: July 2017. What is Rocky Mountain Spotted Fever? Rocky Mountain spotted fever (RMSF) is a disease caused by the bite of a tick infected with the bacterium Rickettsia rickettsii.In New York, the American dog tick (Dermacentar variablis) is the most common tick that spreads the disease principal factors enabling the spread of typhus. The disease causes high fever and maculo-papular eruptions of the skin. Typhus is similar to a disease that occurs in the Rocky Mountains in the United States and is transmitted byticks. The fact that epidemic typhus is transmitted by lice was discovered by Dr. Charles Nicolle; a discovery for.

Video: typhus Definition, Causes, Symptoms, Treatment, & Facts

Typhoid fever - Symptoms and causes - Mayo Clini

Epidemic typhus and trench fever are transmitted from human to human via the louse. Endemic (murine) typhus is primarily maintained in rodent populations and is transmitted via the flea. Humans are an accidental host. Spotted fever is found predominantly in animals and is transmitted by the tick. Humans are accidental hosts Flea-borne typhus is a disease that infected fleas can spread to humans. Bacteria ( Rickettsia typhi and R. felis) found in infected fleas, and their feces, cause typhus. Fleas can come from many types of animals including cats, rats, and opossums. Although pets and animals do not get sick from typhus, typhus can cause high fever, chills. Typhus is a bacterial infection that can cause a high fever, stomach pain and chills but can be treated with antibiotics. Outbreaks are more common in overcrowded and trash-filled areas that. Murine Typhus. Rats are the main carrier for the type of flea that carries Murine typhus, but cats that come into contact with infected fleas can bring these disease vectors home. According to the Texas Department of State Health Services, humans usually get typhus from a flea bite. When the bugs bite, they usually defecate at the same time

Typhus: Symptoms, Signs and Pictures | Health Digest

Typhus: MedlinePlus Medical Encyclopedi

Tick typhus: Also known as Rocky Mountain spotted fever, an acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard-shelled (ixodid) ticks.Occurs only in the Western Hemisphere. Anyone frequenting tick-infested areas is at risk for RMSF.. The onset of symptoms is abrupt with headache, high fever, chills, muscle. Typhus: the Rickettsial Disease 1. TyphusThe Rickettsial Disease 2. Rickettsiae:• parasitic bacteria• Obligate intracellular parasite• Bigger than virus• Smaller than bacteria• Carried by host arthropods• Invade human mononuclear cells, neutrophils, bld vessel endothelium typhus: 1 n rickettsial disease transmitted by body lice and characterized by skin rash and high fever Synonyms: typhus fever Types: endemic typhus , murine typhus , rat typhus , urban typhus acute infection caused by rickettsia and transmitted by the bite of an infected flea; characterized by fever and chills and muscle aches and a rash Type. While typhus had devastating effects in the ghetto, Frydel notes ways that righteous gentiles used public health information about typhus outside of the ghetto as a means to help save Jews in hiding Epidemic (louse-borne) typhus is caused by Rickettsia prowazeki and is common in conditions of civil breakdown and population migration. Rocky Mountain Spotted Fever is spread by ticks, Scrub typhus by mites and endemic typhus by fleas. Q fever may be spread by ticks or by inhalation of infected material

Vectors of Scrub typhus | Scrub typhus and Orientia:

Typhus Treatment, Symptoms, Prevention & Cause

Mexican typhus synonyms, Mexican typhus pronunciation, Mexican typhus translation, English dictionary definition of Mexican typhus. n. Any of several forms of infectious disease caused by rickettsia, especially those transmitted by fleas, lice, or mites, and characterized generally by.. The typhus group of Rickettsiosis includes other forms of typhus, such as the endemic typhus, also known as murine typhus. Murine typhus is caused by the bacterium R. typhi , and is transmitted to humans by contact with infected fleas found on rodents, thus earning the name flea-borne typhus

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Typhus - Epidemiolog

Typhus definition, an acute, infectious disease caused by several species of Rickettsia, transmitted by lice and fleas, and characterized by acute prostration, headache, and a peculiar eruption of reddish spots on the body. See more Typhus definition: Typhus is a serious infectious disease that produces spots on the skin, a high fever, and... | Meaning, pronunciation, translations and example The typhus involved in the L.A. outbreak is known as murine typhus and can spread to people from infected feces of fleas. The feces of fleas are infected with bacteria called Rickettsia typhi.

Scrub Typhus Diagnosis and Prevention - Tips to CareRickettsia prowazekii - microbewiki

Typhus: Symptoms, Signs and Picture

The mite larvae that transmit scrub typhus were thought to live only in parts of Asia and Australia. Now three cases have been reported on an island off Chile's coast typhus: Any of several forms of infectious disease caused by rickettsia, especially those transmitted by fleas, lice, or mites, and characterized generally by severe headache, sustained high fever, depression, delirium, and the eruption of red rashes on the skin Epidemic typhus is a potentially lethal, louse-borne, exanthematous disease caused by Rickettsia prowazekii. R. prowazekii is one of two members of the typhus group of Rickettsia known to cause human illness; the other member, Rickettsia typhi, causes murine typhus. Scrub typhus is caused by Orientia tsutsugamushi Scrub typhus definition is - an acute febrile bacterial disease that is caused by a rickettsia (Orientia tsutsugamushi synonym Rickettsia tsutsugamushi) transmitted by mite larvae, resembles typhus transmitted by lice, and is widespread in the western Pacific area —called also tsutsugamushi disease Learn more about why feral cats do not spread rabies. Flea-borne typhus is rare and cats don't play a part in the fleas arrival or growth. Flea-borne typhus is another infectious disease sometimes erroneously blamed on feral cats. The disease is caused by Rickettsia bacteria that infect fleas, and most U.S. cases occur in Texas, Hawaii, and.

Medical World: Enteric Fever ( Typhoid )Rickettsial Disease and Diagnostic Testing - Fry

Typhus: Symptoms, causes, and treatmen

The Generalgouvernement had given Kudicke 50 million zlotys to combat the typhus epidemic when it spread beyond the ghetto in 1942; the only part allotted to the Jews was an 8,000-zloty. Typhus, distinct from Typhoid was spread by body lice and dirty conditions. Delirium, headaches, rash and high fever were the possible symptoms. We have still not seen the back of this disease. Basic awareness about cleanliness, washing hands after use of toilet and before preparation of food, sterilization of medical equipment, is actually a. English English; typhus spread by rats: murine typhus (c. 1350-1600) revival of the arts and learning that began in Italy and spread throughout Europe (most often associated with the works of Michelangelo, Machiavelli, Dante, and Da Vinci), classical revival, end of Middle Ages, in architectural style of. scrub typhus n. An acute infectious disease common in Asia that is caused by the mite-borne bacterium Orientia tsutsugamushi and is characterized by sudden fever, painful swelling of the lymph nodes, and sometimes skin lesions, including an eschar at the site of infection. Also called Japanese river fever, tsutsugamushi disease. American Heritage.

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