Detection of Rickettsia spp. and host and habitat associations of fleas (Siphonaptera) in eastern Taiwan.

06:00 EST 7th March 2012 | BioPortfolio

Summary of "Detection of Rickettsia spp. and host and habitat associations of fleas (Siphonaptera) in eastern Taiwan."

Rickettsia typhi and Rickettsia felis (Rickettsiales: Rickettsiaceae) are two rickettsiae principally transmitted by fleas, but the detection of either pathogen has rarely been attempted in Taiwan. Of 2048 small mammals trapped in eastern Taiwan, Apodemus agrarius Pallas (24.5%) and Mus caroli Bonhote (24.4%) (both: Rodentia: Muridae) were the most abundant, and M. caroli hosted the highest proportion of fleas (63.9% of 330 fleas). Two flea species were identified: Stivalius aporus Jordan and Rothschild (Siphonaptera: Stivaliidae), and Acropsylla episema Rothschild (Siphonaptera: Leptopsyllidae). Nested polymerase chain reaction targeting parts of the ompB and gltA genes showed six fleas to be positive for Rickettsia spp. (3.8% of 160 samples), which showed the greatest similarity to R. felis, Rickettsia japonica, Rickettsia conorii or Rickettsia sp. TwKM01. Rickettsia typhi was not detected in the fleas and Rickettsia co-infection did not occur. Both flea species were more abundant during months with lower temperatures and less rainfall, and flea abundance on M. caroli was not related to soil hardness, vegetative height, ground cover by litter or by understory layer, or the abundance of M. caroli. Our study reveals the potential circulation of R. felis and other rickettsiae in eastern Taiwan, necessitating further surveillance of rickettsial diseases in this region. This is especially important because many novel rickettsioses are emerging worldwide.


Research and Diagnostic Centre, Centres for Disease Control, Taipei, Taiwan Department of Wildlife, Fish and Conservation Biology, University of California Davis, Davis, CA, U.S.A. Department of Zoology, Endemic Species Research Institute, Ji-Ji, Nantou C

Journal Details

This article was published in the following journal.

Name: Medical and veterinary entomology
ISSN: 1365-2915


PubMed Articles [13399 Associated PubMed Articles listed on BioPortfolio]

Co-feeding intra- and interspecific transmission of an emerging insect-borne rickettsial pathogen.

Cat fleas (Ctenocephalides felis) are known as the primary vector and reservoir of Rickettsia felis, the causative agent of flea-borne spotted fever; however, field surveys regularly report molecular ...


Rickettsia typhi is the causal agent of murine typhus; a worldwide zoonotic and vector-borne infectious disease, commonly associated with the presence of domestic and wild rodents. Human cases of muri...

Ectoparasite Infestations and Canine Infection by Rickettsiae and Ehrlichiae in a Semi-Arid Region of Northeastern Brazil.

This study investigated the prevalence of Rickettsia spp. and Ehrlichia canis infection in dogs and their ectoparasites from rural and urban areas of two municipalities, Petrolina and Juazeiro, within...

Isolation of Candidatus Rickettsia asemboensis from Ctenocephalides Fleas.

Candidatus Rickettsia asemboensis was identified molecularly in fleas collected in 2009 from Asembo, Kenya. Multilocus sequence typing using the 17-kD antigen gene, rrs, gltA, ompA, ompB, and sca4 dem...

The relations between the presence and bacterial loads of Bartonella species in the cat and cat flea (Ctenocephalides felis), under natural conditions.

The cat is considered as the main reservoir of three zoonotic Bartonella species: Bartonella henselae, Bartonella clarridgeiae and Bartonella koehlerae. The cat flea (Ctenocephalides felis) has been e...

Clinical Trials [1401 Associated Clinical Trials listed on BioPortfolio]

Rickettsial Genesis to Sarcoidosis in Denmark

One study has suggested a connection between an infection with Rickettsia species and sarcoidosis finding molecular evidence of rickettsial deoxyribonucleic acid (DNA) in two patients. Ano...

Safety and Immunogenicity Study of Eastern Equine Encephalitis (EEE) Vaccine

This study is designed to determine the safety and immunogenicity of Eastern Equine Encephalitis (EEE) Vaccine

EValuation of HumIRA® in Patients With Active Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis in EASTern European Countries

This is a non-interventional, post-marketing, observational study (PMOS) in which HUMIRA® (adalimumab) is prescribed in the usual manner in accordance with the terms of the local marketin...

Early Detection of Graft-Versus-Host Disease in Patients Undergoing a Donor Bone Marrow Transplant

RATIONALE: Studying samples of blood in the laboratory from patients who have undergone a donor bone marrow transplant may help doctors learn more about changes that occur in DNA and ident...

Host Genetic Susceptibility to Avian Influenza A/H5N1

The identification and characterization of susceptibility loci for H5N1 infection in humans could have profound implications. The detection of host genetic factors may shed light on key pa...

Medical and Biotech [MESH] Definitions

Parasitic, blood-sucking, wingless insects comprising the order Siphonaptera.

An order of parasitic, blood-sucking, wingless INSECTS with the common name of fleas.

A species of gram-negative, aerobic bacteria that is the etiologic agent of ROCKY MOUNTAIN SPOTTED FEVER. Its cells are slightly smaller and more uniform in size than those of RICKETTSIA PROWAZEKII.

Detection of drugs that have been abused, overused, or misused, including legal and illegal drugs. Urine screening is the usual method of detection.

A species of gram-negative, aerobic bacteria that is the etiologic agent of BOUTONNEUSE FEVER. It resembles RICKETTSIA RICKETTSII but is antigenically distinct and less virulent for animals and man. (From Bergey's Manual of Systematic Bacteriology, vol 1)


Relevant Topic

Antiretroviral Therapy Clostridium Difficile Ebola HIV & AIDS Infectious Diseases Influenza Malaria Measles Sepsis Swine Flu Tropical Medicine Tuberculosis Infectious diseases are caused by pathogenic...

Searches Linking to this Article