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Rickettsia 

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  1. Open Access 01-12-2024 | Rickettsia | OriginalPaper

    Retinochoroiditis secondary to Rickettsia typhi infection: a case report

    Murine typhus, also known as endemic typhus, is an infectious illness caused by Rickettsia typhi, an obligate intracellular small gram-negative bacterium and a member of the typhus group of rickettsioses. Infection in humans occurs when infected …

  2. Open Access 01-12-2024 | Rickettsia | ReviewPaper

    Gaps and inconsistencies in the current knowledge and implementation of biosafety and biosecurity practices for rickettsial pathogens

    The World Health Organization (WHO) released the fourth edition of the Laboratory Biosafety Manual (LBM4) in 2020 [ 1 ], which advocates for risk-based biosafety using established knowledge. The WHO LBM4 emphasizes risk-based biosafety to improve …

  3. Open Access 01-12-2024 | Typhoid Fever | OriginalPaper

    A case of neonatal tsutsugamushi disease diagnosed with the aid of rickettsial macrogenomic detection

    Tsutsugamushi, also known as bush typhus, is a naturally occurring disease caused by Orientia tsutsugamushi ( Ot ), with rodents are the main source of infection and chigger mite larvae are the vector [ 1 , 2 ]. Bush typhus occurs when infected …

  4. Open Access 24-11-2023 | Rickettsia | Letter

    Meningoencephalitis and retinal vasculitis due to rickettsial infection

  5. Open Access 01-12-2024 | Rickettsia | OriginalPaper

    Rickettsia conorii subsp. israelensis infection in a pediatric patient presenting skin rash and abdominal pain: a case report from Southeast Iran

    Rickettsia conorii is a vector-borne pathogen that causes Mediterranean spotted fever (MSF). It is transmitted to humans primarily through tick bites [ 1 ]. Based on global data, the incidence of MSF exhibits a seasonal pattern, with the highest …

  6. 22-08-2023 | Rickettsia | OriginalPaper

    Integrating core subtractive proteomics and reverse vaccinology for multi-epitope vaccine design against Rickettsia prowazekii endemic typhus

    Rickettsia prowazekii is an intracellular, obligate, gram-negative coccobacillus responsible for epidemic typhus. Usually, the infected body louse or its excrement when rubbed into the skin abrasions transmits the disease. The infection with R.

  7. Open Access 01-12-2021 | Tick | OriginalPaper

    Mononucleosis-like illnesses due to co-infection with severe fever with thrombocytopenia syndrome virus and spotted fever group rickettsia:a case report

    Severe fever with thrombocytopenia syndrome virus (SFTSV), a novel phlebovirus, renamed Huaiyangshan banyangvirus of the genus Banyangvirus, family Phenuiviridae , and order Bunyavirales , was first identified in China [ 1 , 2 ]. Recently, SFTSV …

  8. Open Access 30-03-2023 | Tick | OriginalPaper

    Clinical usefulness of metagenomic next-generation sequencing for Rickettsia and Coxiella burnetii diagnosis

    Rickettsia and Coxiella burnetii are zoonotic tick-borne pathogens that cause febrile illnesses in humans. Metagenomic next-generation sequencing (mNGS) is a new technology used to diagnose infectious diseases. However, clinical experience with …

  9. Open Access 01-12-2022 | Tick | OriginalPaper

    Rickettsia conorii subsp. israelensis infection: a case report from southeast Iran

    Mediterranean spotted fever (MSF) is an acute febrile and zoonotic disease caused by a Gram-negative and obligate intracellular bacterium called Rickettsia conorii [ 1 ]. This bacterium is a vector-borne pathogen transmitted to humans through a …

  10. Open Access 01-12-2022 | Rickettsia | OriginalPaper

    Molecular screening reveals non-uniform malaria transmission in western Kenya and absence of Rickettsia africae and selected arboviruses in hospital patients

    At least a hundred arboviruses, and several Rickettsia spp., are known to cause mild non-pathognomonic febrile illness in humans [ 1 , 2 ], which in rare cases can lead to a range of severe complications such as encephalitis, haemorrhagic …

  11. Open Access 01-12-2021 | Typhoid Fever | Report

    Abducens nerve palsy with associated retinal involvement secondary to rickettsia typhi infection

    Rickettsial infections, are an important, but often underrecognized, cause of undifferentiated febrile illness [ 1 ]. Rickettsial agents are classified into three major groups: the spotted fever group, the typhus group, and the scrub typhus group.

  12. Open Access 01-12-2021 | Tick | OriginalPaper

    A tick bite patient with fever and meningitis co-infected with Rickettsia raoultii and Tacheng tick virus 1: a case report

    Hard ticks (Acari: Ixodidae) are among the most versatile vectors, capable of transmitting several species of pathogens, including bacteria, protozoa, fungi, nematodes, and viruses, to humans, domestic and wildlife animals [ 1 ]. In Xinjiang Uygur …

  13. Open Access 01-12-2021 | Tick | OriginalPaper

    Scalp eschar and neck lymphadenopathy by Rickettsia slovaca after Dermacentor marginatus tick bite case report: multidisciplinary approach to a tick-borne disease

    SENLAT (Scalp Eschar and Neck LymphAdenopathy after Tick bite) is a zoonotic non-pathogen-specific disease characterized by enlarged neck lymph nodes and scalp eschar after a tick bite. Rickettsia slovaca and Rickettsia raoultii are the etiological …

  14. 01-12-2020 | Typhoid Fever

    Underdiagnoses of Rickettsia in patients hospitalized with acute fever in Indonesia: observational study results

    Rickettsioses are arthropod-borne zoonoses caused by obligate intracellular bacteria from Rickettsia or Orientia genera. They include murine typhus, spotted fever, and scrub typhus groups [ 1 ]. Small mammals serve as reservoirs and arthropods …

  15. 01-12-2020 | Tick

    Asymptomatic-anaplasmosis confirmation using genetic and serological tests and possible coinfection with spotted fever group Rickettsia: a case report

    Anaplasmosis is an infection that is caused by a bite of an Anaplasma phagocytophilum –infected hard tick. It is an acute febrile disease that is characterized by a high fever after a latency period of 7–10 days [ 1 ]. The clinical manifestations …

  16. 01-12-2020 | Typhoid Fever

    Assessing human exposure to spotted fever and typhus group rickettsiae in Ontario, Canada (2013–2018): a retrospective, cross-sectional study

    Rickettsia are Gram-negative, obligate, intracellular bacteria (Rickettsiales: Rickettsiaceae) organized into three groups based on shared phylogenetics, pathology, vectors and arthropod hosts: 1) spotted fever group rickettsiae (SFGR), 2) typhus …

  17. 01-12-2021 | Typhoid Fever | BriefCommunication

    Granulomatous mastitis caused by Rickettsia species

    Granulomatous mastitis is a rare inflammatory disease of varying etiology. Tuberculosis and cystic neutrophilic granulomatous mastitis caused by Corynebacterium are the best-established infectious examples. Despite the increasing incidence of …

  18. 01-03-2022 | Rickettsia | Letter

    Available data do not suggest Rickettsia rickettsii has been found in Indonesia

  19. Open Access 01-12-2019 | Mites | ReviewPaper

    Distribution and Ecological Drivers of Spotted Fever Group Rickettsia in Asia

    Spotted fever group and related rickettsia (SFGR) are a neglected group of pathogens that belong to the genus Rickettsia. SFGR are zoonotic and are transmitted by arthropod vectors, primarily ticks, fleas and mites to accidental hosts. These …

  20. Open Access 01-12-2019 | Tick | OriginalPaper

    A case with neurological abnormalities caused by Rickettsia raoultii in northwestern China

    Rickettsial diseases are prevalent worldwide, although the prevalent organisms differ in different geographical regions [ 1 ]. Rickettsia raoultii ( R. raoultii ) were firstly found in Dermacentor nuttallii ( D. nuttallii ) ticks in 1999 [ 2 ].

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