Materiały źródłowe

• #1 Typhus: Fever, Causes, Symptoms, Treatment & Prevention

  https://my.clevelandclinic.org/health/diseases/typhus

  Typhus (or typhus fever) is the name used for several different types of bacterial infections spread by bug bites that cause similar symptoms, like high fever and rash. […] Bacteria cause all three types of typhus: Rickettsia typhi causes murine typhus. […] Rickettsia prowazekii causes epidemic typhus. […] Orientia tsutsugamushi causes scrub typhus.

• #2 Typhus: Symptoms, Causes, Diagnosis, Treatment, Prevention

  https://www.webmd.com/a-to-z-guides/what-is-typhus/?amp=1

  Typhus is a disease caused by rickettsia or orientia bacteria. You can get it from infected mites, fleas, or lice. […] There are three main kinds of typhus, each caused by different bacteria. […] Insects and other parasites spread murine and epidemic typhus when they bite you and leave bacteria-laden feces on your skin. […] You can get scrub typhus if a mite infected with the bacterium bites you, even if you dont scratch the bite.

• #3 Typhus: Causes, Symptoms, and Diagnosis

  https://www.healthline.com/health/typhus

  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. […] The type of typhus you are infected with depends on what bit you. Arthropods are typically carriers of a typhus strain unique to their species. […] Typhus is not transmitted from person to person like a cold or the flu. There are three different types of typhus, and each type is caused by a different type of bacterium and transmitted by a different type of arthropod. […] This type is caused by Rickettsia prowazekii and carried by the body louse, and possibly by ticks as well. […] Alternatively known as murine typhus, this type is caused by Rickettsia typhi and is carried by the rat flea or cat flea. […] This type is caused by Orientia tsutsugamushi and carried by mites in their larval stage when they are chiggers. […] The louse, flea, tick, or mite becomes a carrier of the bacteria when they feed on the blood of an infected person (epidemic typhus) or an infected rodent (any of the three typhus forms mentioned above).

• #4 Typhoid fever – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/typhoid-fever/symptoms-causes/syc-20378661

  Typhoid fever, also called enteric fever, is caused by salmonella bacteria. […] A bacteria strain called Salmonella enterica serotype typhi causes typhoid fever. Other strains of salmonella bacteria cause a similar disease called paratyphoid fever. […] People pick up the bacteria most often in places where outbreaks are common. The bacteria passes out of the body in the stool and urine of people who are carrying the bacteria. Without careful hand-washing after going to the bathroom, the bacteria can move from the hands to objects or other people. […] The bacteria also can spread from a person who carries the bacteria. It can spread on food that isn’t cooked, such as raw fruits without a peel. In places where water isn’t treated to kill germs, you can pick up the bacteria from that source. This includes drinking water, using ice made from untreated water, or by drinking unpasteurized milk or juice.

• #5 Typhus vs Typhoid Fever: What’s the difference?

  https://www.cedars-sinai.org/newsroom/typhus-vs-typhoid-fever-whats-the-difference/

  Both diseases are infections, but they’re caused by different types of bacteria that are spread in different ways. The kind of typhus we tend to see in the U.S. is spread by fleas that catch the disease from rats and opossums. Typhoid fever is spread through food that’s come into contact with fecal bacteria. […] Typhoid fever, on the other hand, is less common in the U.S. It often manifests after a patient has traveled to Asia or India. […] Fortunately, both infections are treatable. They each respond to different types of antibiotics.

• #6 Typhus Information | Mount Sinai – New York

  https://www.mountsinai.org/health-library/diseases-conditions/typhus

  Typhus is a bacterial disease spread by lice or fleas. […] Typhus is caused by two types of bacteria: Rickettsia typhi or Rickettsia prowazekii. […] Rickettsia typhi causes endemic or murine typhus. […] Rickettsia prowazekii causes epidemic typhus.

• #7 About Epidemic Typhus | Typhus Fevers | CDC

  https://www.cdc.gov/typhus/about/epidemic.html

  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. […] Treatment for epidemic typhus involves the antibiotic doxycycline. […] Epidemic typhus should be treated with the antibiotic doxycycline. Doxycycline can be used in persons of any age.

• #8 Typhus: Background, Pathophysiology, Epidemiology

  https://emedicine.medscape.com/article/231374-overview

  Rickettsioses refers to a group of infectious diseases that are caused by rickettsial organisms and that result in an acute febrile illness. Arthropod vectors such as ticks, mites, lice, and fleas transmit the etiologic agents to humans. […] The arthropod vector of epidemic typhus is the body louse (Pediculus humanus humanus). This is the only vector of the group in which humans are the usual host. Rickettsia prowazekii, which is the etiologic agent of epidemic typhus, lives in the alimentary tract of the louse. […] R prowazekii also is thought to be transmitted in a sylvatic cycle by fleas associated with flying squirrels in the eastern half north of North America. […] Rickettsia sp parasitize the endothelial cells of the small vessels and proliferate, causing endothelial damage, leading to increased vascular permeability, thrombosis, and inflammation.

• #8 Typhus: Background, Pathophysiology, Epidemiology

  https://emedicine.medscape.com/article/231374-overview

  Some people with a history of epidemic typhus may develop a recrudescent type of epidemic typhus known as Brill-Zinsser disease. […] Murine typhus and scrub typhus have the same physiopathology as epidemic typhus, however murine typhus usually is milder. […] Sporadic cases of active infection with R prowazekii, the etiologic agent of epidemic typhus, have been reported. […] The flying squirrel acts as the host for R prowazekii, and transmission to humans is believed to occur via squirrel fleas or lice. […] Murine typhus caused by infection with Rickettsia typhi is associated with exposure to rats, opossums, cats, and their fleas, and it occurs in southern California and southern Texas. […] Epidemic typhus occurs in Central and South America, Africa, northern China, and certain regions of the Himalayas.

• #8 Typhus: Background, Pathophysiology, Epidemiology

  https://emedicine.medscape.com/article/231374-overview

  Brill-Zinsser disease develops in approximately 15% of people with a history of primary epidemic typhus. […] Murine typhus occurs in most parts of the world, particularly in tropical and subtropical and temperate coastal port regions where rats, mice, and cats, hosts of the disease, commonly are found. […] The homeless are particularly vulnerable.

• #9 Epidemic Typhus Fever (louse-borne) – Epidemiology

  https://www.vdh.virginia.gov/epidemiology/epidemiology-fact-sheets/epidemic-typhus-fever-louse-borne/

  Epidemic typhus fever is a disease caused by bacteria called Rickettsia prowazekii. […] Disease is spread by human body lice infected with the bacteria that cause epidemic typhus fever. […] It is the feces, not the bite of the louse that spreads illness to humans. […] The bacteria that cause epidemic typhus fever are considered possible bioterrorism agents because the organism can remain alive in lice feces for weeks and can be made into aerosols that, if breathed in, could cause disease.

• #10 Epidemic Typhus – Infections – MSD Manual Consumer Version

  https://www.msdmanuals.com/home/infections/rickettsial-and-related-infections/epidemic-typhus

  Epidemic typhus is a rickettsial disease that is caused by Rickettsia prowazekii and spread by body lice and occasionally through contact with flying squirrels. […] The infection is usually transmitted by body lice when their feces enters the body through breaks in the skin or sometimes through mucus membranes of the eyes or mouth. […] This infection is called epidemic typhus because in the past, it has caused large outbreaks (epidemics) that killed large numbers of people. […] Epidemic typhus spreads most easily in crowded, unhygienic conditions as occur during war or civil unrest or in areas of extreme poverty. […] Some of the organisms that cause epidemic typhus remain in the body. They may become reactivated if a person’s immune system is weakened.

• #11 Epidemic typhus – Wikipedia

  https://en.wikipedia.org/wiki/Epidemic_typhus

  Epidemic typhus, also known as louse-borne typhus, is a form of typhus so named because the disease often causes epidemics following wars and natural disasters where civil life is disrupted. Epidemic typhus is spread to people through contact with infected body lice, in contrast to endemic typhus which is usually transmitted by fleas. […] The causative organism is Rickettsia prowazekii, transmitted by the human body louse (Pediculus humanus corporis). […] In 1916, Henrique da Rocha Lima proved that the bacterium Rickettsia prowazekii was the agent responsible for typhus. […] The CDC lists the following areas as active foci of human epidemic typhus: Andean regions of South America, some parts of Africa; on the other hand, the CDC only recognizes an active enzootic cycle in the United States involving flying squirrels.

• #12 Rickettsia Prowazekii – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK448173/

  Rickettsia prowazekii is an obligate, intracellular, gram-negative coccobacillus belonging to the genus Rickettsia. It is the causative agent of epidemic typhus which is transmitted by the human body louse. […] R. prowazekii belongs to the typhus group of Rickettsia. […] The vector for epidemic typhus is the human body louse. R. prowazekii multiplies in the gut epithelium of the body louse and explodes into the gastrointestinal (GI) tract, eventually killing the body louse in the process. […] R. prowazekii is unique because no other known members of Rickettsia kill their vector. […] It is the only member of the genus Rickettsia to cause a latent infection, manifesting years to decades later, known as Brill-Zinsser disease (BZD). […] R. prowazekii has been classified as a bioterrorism agent due to its small size, low infectious dose and high morbidity and mortality.

• #13 Epidemic typhus – UpToDate

  https://www.uptodate.com/contents/epidemic-typhus

  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. […] Throughout the Middle Ages and into the early part of the 20th century, periodic epidemics of R. prowazekii infection killed millions of people. As an example, during the eight-year period from 1917 to 1925, over 25 million cases of epidemic typhus occurred in Russia, causing an estimated three million deaths. […] It has been estimated that epidemic typhus has caused more deaths than all the wars in history.

• #14 Department of Agriculture | Typhus Fever – Rickettsia prowazekii

  https://www.nj.gov/agriculture/divisions/ah/diseases/typhus.html

  R. prowazekii is susceptible to 1% sodium hypochlorite, 70% ethanol, glutaraldehyde and formaldehyde. […] The overall case fatality rate for untreated infections is 10 to 40%; the mortality rate increases with age. Infections are rarely fatal in children less than 10 years old; in people over 50 years old, the mortality rate can be as high as 60% without treatment.

• #15 Murine typhus – UpToDate

  https://www.uptodate.com/contents/murine-typhus/print

  Murine (endemic) typhus is a flea-borne infectious disease caused by Rickettsia typhi. […] R. typhi is a member of the typhus group of rickettsiae that also includes the agent of epidemic typhus, Rickettsia prowazekii. […] 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. Humans are infected by inoculation of infective flea feces in bite wounds. […] In addition to serving as hosts for infected fleas, rats may become rickettsemic after contact with an infected flea and thereby transmit the organism to numerous simultaneously feeding fleas. The resultant amplification of rickettsiae may lead to rapid spread of infection to other rats.

• #16 Murine Typhus : Causes, Symptoms and Treatment

  https://www.medicoverhospitals.in/diseases/murine-typhus/

  Murine typhus, a flea-borne disease, is caused by the bacterium Rickettsia typhi. […] Murine typhus is primarily transmitted through the bite of infected fleas, particularly the Oriental rat flea (Xenopsylla cheopis). These fleas are common parasites of rodents, notably rats, which serve as the primary reservoir for Rickettsia typhi. Human infection occurs when flea feces containing the bacteria are scratched into the skin or come into contact with mucous membranes. […] Caused by a bacterium transmitted through flea bites from infected rodents.

• #17 Murine (Endemic) Typhus – Infections – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/infections/rickettsial-and-related-infections/murine-endemic-typhus

  Murine typhus is a rickettsial disease that is caused by Rickettsia typhi and Rickettsia felis and spread by rat fleas. […] The rickettsiae that cause murine typhus live mainly in rats and mice (the hosts). […] The infection is transmitted to people by rat, mouse, and cat fleas.

• #18 FLEA- AND LOUSE-BORNE TYPHUS GROUP RICKETTSIOSES | Harrison’s Manual of Medicine

  https://harrisons.unboundmedicine.com/harrisons/view/Harrisons-Manual-of-Medicine/623254/all/FLEA__AND_LOUSE_BORNE_TYPHUS_GROUP_RICKETTSIOSES

  Caused by R. typhi, endemic murine typhus has a rat reservoir and is transmitted by fleas. […] Humans become infected when Rickettsia-laden flea feces are scratched into pruritic bite lesions; less often, the flea bite itself transmits the organisms or aerosolized rickettsiae from flea feces are inhaled. […] In the United States, endemic typhus occurs mainly in southern Texas and southern California; globally, it occurs in warm (often coastal) areas throughout the tropics and subtropics. […] Risk factors for severe disease include older age, underlying disease, and treatment with a sulfonamide drug.

• #19 Scrub Typhus- Etiology, Epidemiology, Symptoms, Pathogenesis, Diagnosis and Treatment

  https://microbiologyinfo.com/scrub-typhus-etiology-epidemiology-symptoms-pathogenesis-diagnosis-and-treatment/

  Scrub Typhus is an acute febrile illness which is caused by an obligate intracellular pathogen called Orientia tsutsugamushi. […] Orientia tsutsugamushi is the causative agent of Scrub Typhus. […] They are obligate intracellular pathogens which needs to infect eukaryotic cells in order to multiply. […] Initially, they were categorized under genus Rickettsia, but now classed in a separate genus known as Orientia. […] They are rod shaped bacterium. […] The organism is highly virulent and should only be handled in a laboratory with biosafety level 3 facilities. […] They exhibit extensive genomic and antigenic heterogeneity that may lead to the definition of multiple species in the genus. […] This pathogen does not have a vacuolar membrane; thus, it grows freely in the cytoplasm of infected cells.

• #19 Scrub Typhus- Etiology, Epidemiology, Symptoms, Pathogenesis, Diagnosis and Treatment

  https://microbiologyinfo.com/scrub-typhus-etiology-epidemiology-symptoms-pathogenesis-diagnosis-and-treatment/

  Scrub typhus is spread from one person to another by the bite of a mite (called a chigger) infected with Orientia tsutsugamushi. […] The larva (chigger) is the only stage that can transmit the disease to humans and other vertebrates, since the other life stages (nymph and adult) do not feed on vertebrate animals. […] These mites passes the infection to humans by feeding on the fluid in skin cells. […] Orientia tsutsugamushi induces a type 1 immune response, associated with elevation of interferonalpha, IL-18 and IL-15 levels.

• #20 Scrub Typhus Fever (mite-borne) – Epidemiology

  https://www.vdh.virginia.gov/epidemiology/epidemiology-fact-sheets/scrub-typhus-fever-mite-borne/

  Scrub typhus fever is a disease caused by bacteria called Orientia tsutsugamushi. […] Disease is spread to people by the bite of a mite (also called a chigger) infected with the bacteria that causes scrub typhus fever. […] The diagnosis of scrub typhus fever is based on signs and symptoms of illness, as well as laboratory tests. […] Scrub typhus fever is treated with antibiotics.

• #21 Scrub Typhus: Causes, Symptoms And Treatment Of This Bacterial Infection

  https://www.netmeds.com/health-library/post/scrub-typhus-causes-symptoms-and-treatment-of-this-bacterial-infection?srsltid=AfmBOoqN7VAsS-BgG-B-9ZElifeaf2pOqHgK8d3mEen_iKEVkIldDHMd

  An infectious disease instigated by the bacteria Orientia tsutsugamushi, scrub typhus, also known as bush typhus, is an acute febrile illness that could lead to death, if symptoms are not promptly reported and timely medical treatment is not provided. […] Initially categorised along with other bacterial specimens in the Rickettsia genus, the causative organism has since been considered under the Orientia genus. Hence, scrub typhus is also a rickettsial disease presenting similar symptoms of other types of typhus fever, like epidemic louse-borne typhus, endemic murine typhus, but triggered by Orientia strain of bacteria rather than Rickettsia kinds of microbes. […] The bacterial pathogen is transmitted to humans, through bites or stings from trombiculid mite larvae, commonly called chiggers, that transport the Orientia tsutsugamushi microbial strain, similar to tick bites that carry Borrelia bacteria and cause Lyme disease.

• #22 Scrub Typhus – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK558901/

  Scrub typhus is a severe infectious disease caused by the rickettsial bacterium Orientia tsutsugamushi, presenting a significant public health concern in the Asia-Pacific region, especially within the „tsutsugamushi triangle.” […] Scrub typhus is a significant cause of underdiagnosed acute febrile illness and is prevalent in endemic regions. This disease can affect multiple organ systems primarily through vasculitis and perivascular inflammation. […] The infection persists in nature through transovarial transmission in the vector and occasionally in small mammals as a reservoir. […] The Orientia genome exhibits a remarkably high degree of repetition, primarily due to extensive intragenomic deletions and duplications. […] The 56-kDa type-specific antigen is also described as a primary immunogen that can elicit neutralizing antibodies during infection. […] Due to these divergent strains of O tsutsugamushi present in different endemic countries, the development of an effective vaccine has been hindered.

• #23 Scrub Typhus: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/971797-overview

  Scrub typhus is caused by O tsutsugamushi, an obligate intracellular gram-negative bacterium that lives primarily in L akamushi and L deliense mites. This organism is found throughout the mites body but is present in the greatest number in the salivary glands. When the mite feeds on rodents (eg, rats, moles, and field mice, which are the secondary reservoirs) or humans, the parasites are transmitted to the host. Only larval Leptotrombidium mites (chiggers) transmit the disease. […] O tsutsugamushi is very similar to the rickettsiae and indeed meets all of the classifications of the genus Rickettsia; this connection is demonstrated by the high degree of homology (90-99%) on 16S ribosomal sequencing. However, the cell walls are quite different, in that those of O tsutsugamushi lack peptidoglycan and lipopolysaccharide. […] Scrub typhus is caused by Orientia tsutsugamushi, an obligate intracellular gram-negative bacterium, which was first isolated in Japan in 1930.

• #24 Typhus Fevers, Causes, Symptoms, Treatment, Prevention

  https://www.medicinenet.com/typhus/article.htm

  Typhus is a disease caused by bacteria (mainly Rickettsia typhi or R. prowazekii). […] The causes of typhus are small Gram-negative coccobacilli-shaped bacteria, members of the genus Rickettsia that are intracellular parasites of many animals and utilize the components within the cell to survive and multiply. […] Typhus is sometimes generally labeled as flea-borne typhus, tick-borne typhus, or louse-borne typhus, depending on the vector that transmits the bacteria. […] The two Rickettsia species responsible for the two main types of typhus are Rickettsia prowazekii, the cause of epidemic typhus, and R. typhi, the cause of endemic typhus. […] Epidemic typhus usually spreads to humans from body lice feces contaminated with R. prowazekii or occasionally from animal droppings contaminated with these bacteria. […] Endemic typhus usually spreads to humans by flea feces or animal droppings containing R. typhi or R. felis.

• #25 Scrub typhus update: A re‑emerging global threat beyond the Tsutsugamushi Triangle and the physiological ramifications of scrub typhus infection (Review)

  https://www.spandidos-publications.com/10.3892/wasj.2025.322

  Scrub typhus, caused by Orientia tsutsugamushi, is a miteborne zoonotic disease endemic to Asia and the Pacific. […] Orientia tsutsugamushi is a Gram-negative bacterium that depends on living cells for survival and causes scrub typhus, a disease transmitted by mites. […] The bacterium Orientia tsutsugamushi was initially discovered in Guangzhou, China. […] The larvae of trombiculid mites, also known as chiggers, are primary vectors for rickettsial pathogens, particularly Orientia spp., which cause the zoonotic disease scrub typhus. […] Chiggers are the only known vectors for Orientia bacteria, which cause scrub typhus. […] The immune defense against Orientia involves both humoral and cell-mediated responses. […] Orientia tsutsugamushi, the causative agent of scrub typhus, initiates infection by binding to the heparin sulfate proteoglycan receptor, specifically syndican-4, expressed on dermal cells. […] The bacteria subsequently spread to various organs, including the kidneys and liver, heart and lungs, where they enter endothelial cells. […] The proposed mechanisms of Orientia tsutsugamushi infection in humans and the subsequent immune response to renal cell damage are depicted in Fig. 6.

• #26 Typhus: MedlinePlus Medical EncyclopediaLock

  https://medlineplus.gov/ency/article/001363.htm

  Typhus is a bacterial disease spread by lice or fleas. […] Typhus is caused by two types of bacteria: Rickettsia typhi or Rickettsia prowazekii. […] Rickettsia typhi causes endemic or murine typhus. […] Rickettsia prowazekii causes epidemic typhus. […] Brill-Zinsser disease is a mild form of epidemic typhus. It occurs when the bacteria become active again in a person who was previously infected.

• #27 Typhus: Causes, Symptoms, and Diagnosis

  https://almerja.com/en/more.php?pid=422

  The louse, flea, tick, or mite becomes a carrier of the bacteria when they feed on the blood of an infected person (epidemic typhus) or an infected rodent (any of the three typhus forms mentioned above). […] If you come in contact with these bacterium-carrying arthropods (for example, by sleeping on bed sheets infested with lice), you can become infected in a couple ways. The bacteria, in addition to being transmitted through your skin by their bites, can also be transmitted through their feces. […] Epidemics of typhus are more common in poor, unsanitary, and crowded areas. People who are most at risk of dying are generally those who are unable to afford quick treatments. […] Mortality for epidemic typhus that goes untreated can range from 10 to 60 percent, and mortality from untreated scrub typhus can range up to 30 percent. […] During World War II, a vaccine was created to prevent epidemic typhus. However, the shrinking number of cases has stopped the manufacture of the vaccine.

• #28 Typhus – Causes, Symptoms, Diagnosis, and Treatment

  https://www.apollohospitals.com/diseases-and-conditions/typhus

  Typhus is a group of infectious diseases caused by bacteria that are transmitted to humans through parasites such as fleas, lice, and mites. […] Typhus refers to a group of diseases caused by the Rickettsia bacteria, which are obligate intracellular parasites. […] Typhus is primarily caused by the Rickettsia bacteria, which are transmitted through vectors: […] Epidemic Typhus: Transmitted by body lice, which thrive in crowded and unsanitary conditions. […] Endemic Typhus: Spread by fleas that infest rats and other rodents. […] Scrub Typhus: Transmitted by mites found in scrub vegetation, particularly in rural areas. […] Environmental factors such as poor sanitation, overcrowding, and lack of access to clean water significantly increase the risk of typhus outbreaks. […] While typhus is primarily an infectious disease, certain genetic predispositions may influence an individual’s susceptibility to severe forms of the disease.

• #28 Typhus – Causes, Symptoms, Diagnosis, and Treatment

  https://www.apollohospitals.com/diseases-and-conditions/typhus

  Lifestyle factors such as living in overcrowded conditions, poor hygiene practices, and inadequate access to healthcare can increase the risk of contracting typhus. […] Individuals with compromised immune systems, such as those with HIV/AIDS or chronic illnesses, are at greater risk. […] Typhus is treated with antibiotics, primarily doxycycline. […] Preventing typhus involves several strategies: […] While there is no widely available vaccine for typhus, research is ongoing. […] Untreated typhus can lead to severe pneumonia, kidney failure, and neurological issues.

• #29 Scrub Typhus: Causes, Symptoms, and Treatment – HealthSy Article

  https://healthsy.app/all-category-blog/scrub-typhus-causes-symptoms-and-treatment

  Scrub Typhus is a bacterial infection caused by Orientia tsutsugamushi. […] The changing climate in Tamil Nadu provides a chance for the mites that spread Scrub Typhus (chiggers), to thrive. […] Scrub Typhus is typically treated with antibiotics such as azithromycin and doxycycline, which are effective in combating the infection. […] People who frequently work or live in grassy or bushy areas such as Farmers and outdoor workers who spend extended time in green and dense regions are more susceptible to Scrub Typhus.

• #30 Typhus – Knowledge and References – Taylor & Francis

  https://taylorandfrancis.com/knowledge/Medicine_and_healthcare/Infectious_diseases/Typhus/

  Typhus is a bacterial infection caused by Rickettsia prowazekii that can be transmitted from person to person by the human body louse or by flea bite. […] Epidemic typhus is an infection with a bacterium called Rickettsia prowazekii that is transmitted from person to person by the human body louse; the bacterium resides in the feces of the louse. […] The mortality rate of untreated epidemic typhus is anywhere from 10 to 60 percent; with antibiotics, the condition is uniformly survivable. […] For typhus, and many other infectious diseases, vaccines were difficult to produce and only partially effective, and there was no chemotherapy; typhus remained endemic in eastern Poland and Russia. […] Typhus fever caused by Rickettsia prowazekii was classified as the category B on the list of bioterrorism agents.

• #31 Typhus: Symptoms, Causes & Treatment | StudySmarter

  https://www.studysmarter.co.uk/explanations/biology/communicable-diseases/typhus/

  The primary go-to pharmaceutical drug for combatting Typhus is doxycycline. […] Chloramphenicol is often employed as a second-line drug in Typhus treatment, primarily used when there is resistance to doxycycline, or when the patient is allergic to it. […] Historically, Typhus has drastically impacted times of war and crisis; it still poses risks in areas afflicted by poverty, displacement, or war.

• #32 Scrub typhus

  https://dermnetnz.org/topics/scrub-typhus

  Scrub typhus is a disease caused by infection from the Rickettsia bacteria, Orientia tsutsugamushi. […] Orientia bacteria are transmitted via infected trombiculid mites. […] Through this process the Orientia bacteria are transmitted into the individual. […] Scrub typhus is usually responsive to tetracycline antibiotics, especially doxycycline. […] The mortality associated with scrub typhus may be as high as 60% in untreated cases.

• #33 HIE Multimedia – Typhus

  https://adamcertificationdemo.adam.com/content.aspx?productid=117&pid=1&gid=001363

  Typhus is a bacterial disease spread by lice or fleas. […] Typhus is caused by two types of bacteria: Rickettsia typhi or Rickettsia prowazekii. […] Rickettsia typhi causes endemic or murine typhus. […] Rickettsia prowazekii causes epidemic typhus. […] Typhus may cause these complications: renal insufficiency, pneumonia, and central nervous system damage.

• #34 IDCM — Infectious Diseases and Clinical Microbiology

  https://www.idcmjournal.org/scrub-typhus-with-mods-and-immune-thrombocytopenia

  Scrub typhus is a mite-borne infectious disease caused by Orientia tsutsugamushi, a gram-negative intracellular bacterium. It is a severe public health problem that affects mainly Asia-Pacific areas. Scrub typhus threatens one billion people and causes illness worldwide each year. Approximately one-third of the cases may suffer from multiple organ dysfunction syndrome (MODS) during the disease course. Thrombocytopenia is another critical clinical manifestation of scrub typhus, and thrombocytopenia is one of the causes of MODS. […] Scrub typhus is rare, and it is hard to diagnose and treat. […] About a third of patients admitted with scrub typhus have evidence of multi-organ dysfunction. Our patient had renal failure, hepatitis, and thrombocytopenia. In this case, our patients illness was caused by bug bites, which is a typical cause of tsutsugamushi disease. […] Scrub typhus may cause thrombocytopenia and MODS. Previous studies have demonstrated that thrombotic microangiopathic syndrome is the mechanism of thrombocytopenia-associated MODS.

• #35 Typhus Treatment, Causes, Symptoms & Outbreak History

  https://www.emedicinehealth.com/typhus/article_em.htm

  Typhus is a group of diseases that cause fever, headache, and rash. […] Bacteria of the Rickettsia family causes typhus, and arthropods (chiggers, lice, mites, or fleas) spread the bacteria to humans. […] The bacteria Orientia tsutsugamushi causes scrub typhus. It spreads by bites of infected chiggers. […] The bacteria Rickettsia typhi causes endemic typhus (murine typhus). Murine typhus spreads through contact with infected fleas. […] Epidemic typhus is rare today. Rickettsia prowazekii bacteria causes it, and it spreads through infected body lice. This type of typhus caused millions of deaths historically when body lice were more prevalent. […] There are no commercially available vaccines to prevent any of the forms of typhus.

• #36

  https://historyofvaccines.org/blog/typhus-war-and-vaccines/

  Typhus is a bacterial disease caused by Rickettsia bacteria. […] Rickettsia typhi causes endemic typhus, also known as murine typhus, and is the least virulent. […] Rickettsia prowazekii causes epidemic typhus, which is spread via lice. […] In the early 20th century, French bacteriologist Charles Nicolle observed typhus patients and noticed after receiving a hot bath and clean clothes they were no longer infectious. […] By 1909 he correctly hypothesized that the louse is the vector for transmitting the disease from person to person. […] During the inter-war period Rudolf Weigl, a Polish biologist and zoologist, began experimenting with lice in order to discover a typhus vaccine once and for all. […] Typhus is now considered to be endemic only in certain areas of the world, including Eastern Africa and a few areas in South and Central America. […] No vaccines are currently available to prevent typhus, but improved hygienic practices, effective insecticides, and antibiotics have made it easier to combat the disease and the lice that spread it.

• #37 Typhus: Causes, Symptoms & Effective Treatment Options

  https://www.manipalhospitals.com/bhubaneswar/blog/typhus-causes-symptoms-and-effective-treatment-options/

  Typhus fever was once a feared and dangerous disease that killed millions of people. The condition develops because of a group of rare bacterial infections that an individual contracts after being bitten by an infected insect. […] Different subspecies of Rickettsia bacteria spread typhus fever. These bacteria acquire infection from biting infected persons or animals and continue to transfer the infection through their bite. For instance, Rickettsia typhi causes murine typhus, Rickettsia prowazekki causes epidemic typhus, and Orientia tsutsugamushi causes scrub typhus. […] Typhus fever is caused by bacteria from the Rickettsia family, transmitted through fleas, lice, and mites.

• #38 Typhus Fevers Explained

  https://www.verywellhealth.com/typhus-5080159

  Typhus fevers are a group of diseases caused by rickettsia bacteria infection. Typhus is transferred to humans by an infected animal. Typical carriers include fleas, mites, and lice. […] Today, typhus is called either endemic, epidemic, or bush typhus depending on the cause of the infection. Each type of typhus presents itself differently. […] The specific bacteria responsible for the infection is called Rickettsia typhi. […] The specific bacteria that causes this type of typhus is called the Rickettsia prowazekii. […] This type of infection is caused by the Orientia tsutsugamushi bacteria, which is spread by chiggers or larvae mites. […] The first written account of typhus appeared in 1489, and the first known outbreak of epidemic typhus occurred in 18th-century France. […] Typhus is a group of bacterial illnesses spread by insect bites. There are three different types, including murine typhus, epidemic typhus, and scrub typhus. Typhus can cause a range of symptoms including high fever, chills, and body aches.

• #39 Typhus – Insects, Disease, and Histroy | Montana State University

  https://www.montana.edu/historybug/typhus.html

  Rickettsia prowazekii (da Rocha-Lima), a bacterialike organism, causes the dreadful disease. […] Typhus truly is a disease of humans and lice; no animal reservoirs are known to be involved in the disease cycle. […] A louse becomes infected with typhus by taking a blood meal from a fever-ridden human. […] Mortality is incredibly high under epidemic conditions, nearing 100%. […] The conditions of war are perfect for typhus to explode into a raging epidemic because poverty, crowding, mass migrations, inadequate housing, and malnutrition encourage its spread. […] Typhus’ association with war and its devastating effect continued until World War II.

• #40 Typhus | Definition, Causes, Symptoms, Treatment, & Facts | Britannica

  https://www.britannica.com/science/typhus

  typhus, series of acute infectious diseases that appear with a sudden onset of headache, chills, fever, and general pains, proceed on the third to fifth day with a rash and toxemia (toxic substances in the blood), and terminate after two to three weeks. 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. […] Epidemic typhus has also been called camp fever, jail fever, and war fever, names that suggest overcrowding, underwashing, and lowered standards of living. It is caused by the bacterium Rickettsia prowazekii and is conveyed from person to person by the body louse, Pediculus humanus humanus. […] Major progress in combating the disease began only after 1909, when the French physician Charles-Jules-Henri Nicolle demonstrated that typhus is transmitted from person to person by the body louse. […] Endemic, or murine, typhus, caused by Rickettsia typhi, has as its principal reservoir of infection the Norway rat; occasionally, the common house mouse and other species of small rodents have also been found to be infected.

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