| geographic association of rickettsia felis-infected opossums with human murine typhus, texas. | application of molecular diagnostic technology in the past 10 years has resulted in the discovery of several new species of pathogenic rickettsiae, including rickettsia felis. as more sequence information for rickettsial genes has become available, the data have been used to reclassify rickettsial species and to develop new diagnostic tools for analysis of mixed rickettsial pathogens. r. felis has been associated with opossums and their fleas in texas and california. because r. felis can cause h ... | 2002 | 12023908 |
| rickettsia felis infection rates in an east texas population. | murine typhus (rickettsia typhi), endemic in southern california and south texas, is maintained within a host-vector system consisting of the opossum and cat flea. in the early 1990s, a second rickettsial species, rickettsia felis, was also found to be maintained within the opossum-cat flea system and is, in fact, found more commonly than r. typhi in the opossum and cat flea. recognized as a human pathogen in 1994, r. felis causes an infection that produces symptoms indistinguishable from classi ... | 2005 | 16130886 |
| prevalence of rickettsia felis dna in the blood of cats and their fleas in the united states. | rickettsia felis is associated with fever, headache, myalgia, and macular rash in some infected humans and has been detected in the cat flea (ctenocephalides felis) in many countries around the world. while some naturally exposed cats have been assessed for antibodies against r felis, to our knowledge, no one has reported use of polymerase chain reaction (pcr) to attempt to amplify r felis dna from client-owned cats and the fleas collected from them. in this study, we assayed 92 pairs of cat blo ... | 2007 | 17276123 |
| molecular detection of bacteria in the families rickettsiaceae and anaplasmataceae in northern crested caracaras (caracara cheriway). | bacterial pathogens of the families anaplasmataceae and rickettsiaceae are often spread to humans or other animals from bites from infected arthropod hosts. recently, an increasing number of studies have implicated migratory birds in the circulation of these pathogens through the spread of arthropod vectors. however, few studies have examined the potential for resident bird populations to serve as reservoirs for these zoonoses. in this study, we used nested pcrs of the groesl and 17 kda genes to ... | 2016 | 26837860 |
| detection of rickettsia species in fleas collected from cats in regions endemic and nonendemic for flea-borne rickettsioses in california. | rickettsia typhi, transmitted by rat fleas, causes most human flea-borne rickettsioses worldwide. another rickettsia, rickettsia felis, found in cat fleas, ctenocephalides felis, has also been implicated as a potential human pathogen. in the continental united states, human cases of flea-borne rickettsioses are reported primarily from the southern regions of texas and california where the cat flea is considered the principal vector. in california, more than 90% of locally acquired human cases ar ... | 2016 | 26824189 |
| urban focus of rickettsia typhi and rickettsia felis in los angeles, california. | abstract classic murine typhus, caused by rickettsia typhi, is endemic in the continental united states in areas of texas and southern california. we conducted an environmental investigation in an urban area of los angeles identified as the probable exposure site for a case of murine typhus. four rattus norvegicus heavily infested with xenopsylla cheopis (average 32.5 fleas per animal, range 20-42) were trapped, and fleas, blood, and tissues were collected. dnas from all specimens were tested fo ... | 2010 | 21142968 |
| first detection of rickettsia typhi and rickettsia felis in fleas collected from client-owned companion animals in the southern great plains. | flea-borne rickettsiosis occurs worldwide and includes a number of pathogens, namely, rickettsia typhi and rickettsia felis. most studies in the united states have occurred in southern texas and california where flea-borne rickettsiosis is endemic, resulting in a lack of information from other regions of the country. between march and august 2016, 222 fleas were collected from 52 client-owned dogs and cats in two urban areas in oklahoma. fleas were identified using morphological characteristics ... | 2017 | 28399210 |