Title : Feeding Period Required by Amblyomma aureolatum Ticks for Transmission of Rickettsia rickettsii to Vertebrate Hosts Personal Author(s) : Saraiva, Danilo G.;Soares, Herbert S.;Soares, João Fábio;Labruna, Marcelo B. (cdc.gov)
Rickettsia rickettsii is a member of the spotted fever group rickettsiae and the etiologic agent of Rocky Mountain spotted fever (RMSF). (nih.gov)
Owing to the potential role of the tick Amblyomma cooperi in the enzootic cycle of Rickettsia rickettsii, the etiologic agent of Brazilian spotted fever (BSF), this study evaluated infection by Rickettsia species in A. cooperi ticks collected from an area in Brazil where BSF is endemic. (utmb.edu)
These results do not support the role of A. cooperi in the ecology of R. rickettsii in the area studied, but they add two more species of rickettsiae to the poorly developed list of species occurring in ticks in South America. (utmb.edu)
for nearly as long, a. maculatum have been known to harbor the spotted fever group rickettsia (sfgr), now known as rickettsia parkeri. (liverpool.ac.uk)
The SFG rickettsial isolate could not be stably passaged in cell culture in the laboratory, but molecular analysis of early passages suggested that it was closely related to Rickettsia parkeri, Rickettsia africae, and Rickettsia sibirica. (utmb.edu)
RMSF was considered the only tick-borne rickettsiosis in the United States for more than 100 years, until Rickettsia parkeri emerged in 2004. (contagionlive.com)
Additionally, Amblyomma maculatum harbors and transmits Rickettsia parkeri, a spotted fever group rickettsiosis, and this tick bites humans. (canlyme.com)
Bartonella2
Prevalence and clinical presentation of Rickettsia, Coxiella, Leptospira, Bartonella and chikungunya virus infections among hospital-based febrile patients from December 2008 to November 2009 in Bangladesh. (jptcp.com)
In studies of biopsy-proven HSV encephalitis, common infectious mimics of focal viral encephalitis included mycobacteria, fungi, rickettsiae, Listeria, Mycoplasma , and other bacteria (including Bartonella sp. (basicmedicalkey.com)
Acute febrile illness1
Global knowledge gaps in acute febrile illness etiologic investigations: A scoping review. (jptcp.com)
This bacterium is the etiologic agent of North Asian tick typhus, which is also known as Siberian tick typhus. (wikipedia.org)
Select Agents are microorganisms (virus, bacterium, fungus or rickettsia) or toxins listed in Appendix A to CFR 72 that may cause, among other issues, serious harm to the public. (peacehealthlabs.org)
Spotted Fever Group Rickettsiosis1
Amblyomma longirostre carries Rickettsia amblyommatis which causes spotted fever group rickettsiosis, a febrile disease in humans. (canlyme.com)
Typhi1
Prior infection with Rickettsia typhi provides subsequent and long-lasting immunity to reinfection. (medscape.com)
Vectors1
Arthropod vectors transmit the etiologic agents to humans. (medscape.com)
Ticks3
Zeidner NS , Burkot TR , Massung R . Transmission of the agent of human granulocytic ehrlichiosis by Ixodes spinipalpis ticks: evidence of an enzootic cycle of dual infection with Borrelia burgdorferi in northern Colorado. (cdc.gov)
Among a total of 40 A. cooperi adult ticks collected in an area of BSF endemicity in the state of São Paulo, PCR analysis detected DNA of Rickettsia bellii in 16 ticks (40%), and 3 other ticks (7.5%) were positive for a previously unidentified spotted-fever-group (SFG) rickettsia. (utmb.edu)
Cultivation in Vero cell cultures by the shell vial technique with individual A. cooperi ticks resulted in two isolates of R. bellii and one isolate genotypically characterized as an SFG rickettsia. (utmb.edu)
Amblyomma1
beauveria bassiana (ascomycota: hypocreales) as a management agent for free-living amblyomma americanum (acari: ixodidae) in ohio. (liverpool.ac.uk)
Leptospira1
In this study, a correct characterization of all of the hemorrhagic disease accompanying high fever which might be caused by various agents such as leptospira, rickettsia, viruses, and others if any was attempted by classifying the symptoms and identifing the etiologic agent which is responsible for the cases. (e-epih.org)
Species5
They are caused by bacterial species of the genus Rickettsia and the closely related, but genetically distinct, genus Orientia . (health.mil)
Species classified within the genus Rickettsia are generally divided into 4 groups (i.e., clades). (health.mil)
The spotted fever group (SFG) comprises more than 30 species and includes the etiologic agents for Rocky Mountain spotted fever (RMSF), African tick-bite fever (ATBF), and Mediterranean spotted fever (MSF). (health.mil)
7 Understanding of the epidemiology of rickettsial diseases continues to evolve as new information accumulates about the expanding geographic distribution of the causative pathogens, 8 the emergence of antibiotic-resistant strains,9 and the discovery of new species in the genera Rickettsia and Orientia . (health.mil)
With the completed sequences of multiple rickettsial species and recently developed technologies to genetically manipulate rickettsiae, it has become possible to investigate differences between virulent and avirulent strains of rickettsiae through comparative genomics and molecular biology. (nih.gov)
Bacteria1
The Rickettsia and Orientia genera both encompass a large group of obligate intracellular, gram-negative bacteria. (health.mil)
Hermsii1
Abstract The spirochetes Borrelia (Borreliella) burgdorferi and Borrelia hermsii, the etiologic agents of Lyme disease and relapsing fever, respectively, cycle in nature between an arthropod vector and a vertebrate host. (canlyme.com)
Typhus4
Rickettsia prowazekii, which is the etiologic agent of typhus, lives in the alimentary tract of the louse. (medscape.com)
After a patient with typhus is treated with antibiotics and the disease appears to be cured, Rickettsia may linger in the body tissues. (medscape.com)
Sporadic cases of active infection with R prowazekii, the etiologic agent of epidemic typhus, have been reported. (medscape.com)
The typhus group includes the pathogens that cause epidemic and murine typhus, while the transitional group includes agents that cause rickettsialpox and Queensland tick typhus. (health.mil)
Bellii1
The ancestral group includes the tick-borne agents Rickettsia bellii and R. canadensis but does not contain pathogens that cause human disease. (health.mil)
Prowazekii1
R prowazekii is also thought to be transmitted by fleas associated with flying squirrels and their nesting material, by inhaling dried louse feces, or by rubbing Rickettsia -containing louse feces inadvertently into eyes, mucous membranes, or in insect bite-associated wounds. (medscape.com)
Infection1
The approach to the patient with a potential zoonotic infection involves the generation of a differential diagnosis that includes those infectious agents that are potentially transmissible from the specific animal(s) to which the patient was exposed. (scienceopen.com)
Feline granulocytic ehrlichiosis--a report of a new clinical entity and characterisation of the infectious agent. (unt.edu)
RMSF1
Most cases are reported from the central and southeastern United States, where Dermacentor variabilis is the main vector of the RMSF agent. (contagionlive.com)
Lice1
when the host scratches the site, the lice are crushed, and the Rickettsia- laden excrement is inoculated into the bite wound. (medscape.com)
Humans3
Chlamydia trachomatis is the etiological agent of several significant diseases of humans, including trachoma, the leading cause of infectious blindness worldwide. (nih.gov)
1 As many zoonotic agents are uncommon in humans and, for a number, have been established as causes of laboratory-acquired infections, good communication with the clinical microbiology laboratory is essential. (scienceopen.com)
2 In those cases in which the pathogen is a potential agent of bioterrorism or is uncommon in humans, even a well-equipped clinical microbiology laboratory may be unable to perform the necessary testing on-site. (scienceopen.com)
Group1
Previous studies demonstrated that transcript abundance of two defensins from D. variabilis increases in response to the model Spotted Fever Group organism Rickettsia montanensis. (umaryland.edu)
Infectious agents3
Tuberculosis, measles and shigellosis are not normally infectious agents of nonhuman primates. (scienceopen.com)
Evidence now confirms that noncommunicable chronic diseases can stem from infectious agents. (canlyme.com)
Furthermore, at least 13 of 39 recently described infectious agents induce chronic syndromes. (canlyme.com)
Cattle1
Almost a century ago, E. ruminantium was isolated from cattle as the etiologic agent of heartwater ( Cowdry, 1925 ). (frontiersin.org)
Human1
A Rickettsia- harboring louse bites a human to engage in a blood meal and causes a pruritic reaction on the host's skin. (medscape.com)
Diagnostic2
6. Joshi R, Colford JM, Reingold A. Nonmalarial acute undifferentiated fever in a rural hospital in central India - Diagnostic uncertainity and overtreatment with anti malarial agents. (jptcp.com)
No person may knowingly transport or cause to be transported in interstate traffic, directly or indirectly any material, including but not limited to, diagnostic specimens and biological products which such person reasonably believes may contain any etiologic agent unless such material is packaged to withstand leakage of contents, shocks, pressure changes, and other conditions incident to ordinary handling in transportation. (peacehealthlabs.org)
Analysis1
Although rarely practical, the tick may be saved for laboratory analysis to check for etiologic agents of tick-borne disease in the geographic area where the patient acquired the tick. (merckmanuals.com)
Years1
The etiologic spectrum of tick-borne rickettsioses in the United States has expanded during the past 15 years, said Christopher D. Paddock, MD, from the CDC in Atlanta, Georgia. (contagionlive.com)
Provide1
An occupational history, obtained in some detail, can provide important information on those zoonotic agents to which an individual may have been exposed. (scienceopen.com)
Person1
How the Rickettsia organisms linger silently in a person and by what mechanism recrudescence is mediated are unknown. (medscape.com)