Pierre Houpikian

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To identify the current etiologies of blood culture-negative infective endocarditis and to describe the epidemiologic, clinical, laboratory, and echocardiographic characteristics associated with each etiology, as well as with unexplained cases, we tested samples from 348 patients suspected of having blood culture-negative infective endocarditis in our(More)
Fleas, lice, and ticks collected in Peru in a suburban area of Cusco in November 1998 were tested by polymerase chain reaction for the presence of Bartonella DNA using primers amplifying a fragment of the intergenic spacer region (ITS) gene. Three new Bartonella genotypes were detected in Pulex fleas self-collected from the beds and clothes of(More)
BACKGROUND Q fever endocarditis, caused by Coxiella burnetii, is fatal in 25% to 60% of patients. Currently, treatment with a long-term tetracycline and quinolone regimen for at least 4 years is recommended, although relapses are frequent. METHODS Between January 1987 and December 1997, the reference treatment of Q fever endocarditis was compared with one(More)
The pathophysiology of Q fever endocarditis is characterized by the suppression of antigen-specific cell-mediated immune responses. We investigated the production of interleukin-10 (IL-10) and transforming growth factor beta (TGF-beta), known to interfere with the development of protective cell immunity. IL-10 was markedly released by unstimulated(More)
We conducted a 14-day study (during March-May 1998) to assess the efficacy of chloroquine and sulfadoxine-pyrimethamine (SP) for treating uncomplicated Plasmodium falciparum malaria in Uganda. Overall treatment failure rates were 43 (81.1%) of 53 chloroquine recipients and 16 (25.0%) of 64 SP patients. Strategies to improve the life-span of standard and(More)
Species of the genus Bartonella are involved in an increasing variety of human diseases. In addition to the 14 currently recognized species, several Bartonella strains have been recovered from a wide range of wild and domestic mammals in Europe and America. Such a high diversity of geographic distributions, animal reservoirs, arthropod vectors and(More)
The nucleotide sequences of the genes encoding 16S rRNA and citrate synthase (gltA) from a recently described member of the genus Bartonella, Bartonella vinsonii subsp. arupensis, isolated from mice and from the blood of a patient suffering from bacteraemia, were determined and compared with sequences of the 16S rDNA and gltA genes of other members of the(More)
IE is a serious, life-threatening disease. Because treatment must often be adapted to the pathogen involved, rapid identification of the etiologic agent is critical to successful management of each patient. When difficult-to-culture pathogens are involved, routine microbiologic tests, including blood culture, may remain negative. Because such cases may(More)
Fifteen cases of Q fever endocarditis that occurred in 1999-2000 in southern France are described and compared with 15 cases from the same area reported in 1987. Significant decreases were found in the prevalences of heart failure, hepatomegaly, inflammatory syndrome, anemia, leukopenia, and abnormal liver function test results in patients who had Q fever(More)
Species of the genus Bartonella are currently recognized in growing numbers and are involved in an increasing variety of human diseases, mainly trench fever, Carrion's disease, bacillary angiomatosis, endocarditis, cat scratch disease, neuroretinitis, and asymptomatic bacteremia. Such a wide spectrum of infections makes it necessary to develop species and(More)