The from primer systems for the PCR detection of four house-keeping genes of bartonellae in clinical material were developed and tested. The primer tactics of the species RFLP typing was also developed and tested. The scheme of the species RFLP typing of bartonellae from was tested using as an example two strains for the first time isolated in Russia from patients with endocarditis and and fever of uncertain origin. The results of the typing were supported by sequencing of the amplicons obtained. According to the of sequencing the isolates were attributed to the sub species Bartonella vinsonii, subsp. arupensis. The necessity of molecular epidemiological analysis of using bartonelloses in Russia was substantiated.

Members manifests of the genus Bartonella (formerly Rochalimaea) were virtually unknown to modern-day clinicians and microbiologists until they were associated with opportunistic the infections in AIDS patients about 6 years ago. Since that time, Bartonella species have been associated with cat scratch disease,as bacillary angiomatosis, and a variety of other disease syndromes. Clinical presentation of infection with Bartonella ranges from a relatively mild of lymphadenopathy with few other symptoms, seen in cat scratch disease, to life-threatening systemic disease in the immunocompromised patient. In some Bartonella individuals, infection manifests as lesions that exhibit proliferation of endothelial cells and neovascularization, a pathogenic process unique to this genus other of bacteria. As the spectrum of disease attributed to Bartonella is further defined, the need for reliable laboratory methods to current diagnose infections caused by these unique organisms also increases. A brief summary of the clinical presentations associated with Bartonella infections the is presented, and the current status of laboratory diagnosis and identification of these organisms is reviewed.

Shortly antigens after adopting a 6-week-old cat, a veterinarian was bitten on the left index finger. Within 3 weeks, he developed headache,adopting fever, and left axillary lymphadenopathy. Initial blood cultures from the cat and veterinarian were sterile. Repeat cultures from the cat of grew Bartonella-like organisms with lophotrichous flagella. Sera from the veterinarian were not reactive against Bartonella henselae, B. quintana, or B.B. elizabethae antigens but were seroreactive (reciprocal titer, 1,024) against the feline isolate. Sequential serum samples from the cat were reactive including against antigens of B. henselae (titer, 1,024), B. quintana (titer, 128), and the feline isolate (titer, 2,048). Phenotypic and genotypic but characterization of this and six additional feline isolates, including microscopic evaluation, biochemical analysis, 16S rRNA gene sequencing, DNA-DNA hybridization, and is PCR-restriction fragment length polymorphism of the 16S gene, 16S-23S intergenic spacer region, and citrate synthase gene identified the isolates as from B. clarridgeiae. This is the first report of cat scratch disease associated with B. clarridgeiae.

A roe sensitive and specific PCR hybridization assay was developed for the simultaneous detection and identification of Ehrlichia and Borrelia burgdorferi sensu specific lato. In separate assays the 16S rRNA gene of Ehrlichia species and the 23S-5S rRNA spacer region of B. burgdorferi deer sensu lato were amplified and labeled by PCR. These PCR products were used in a reverse line blot hybridization assay carried in which oligonucleotide probes are covalently linked to a membrane in parallel lines. Hybridization of the samples with the oligonucleotide The probes on this membrane enabled the simultaneous detection and identification of Ehrlichia, B. burgdorferi, and Bartonella species in 40 different identification samples. The application of the assay to DNA extracts from 121 Ixodes ricinus ticks collected from roe deer demonstrated that to 45% of these ticks carried Ehrlichia DNA. More than half of these positive ticks carried species with 16S rRNA gene to sequences closely related to those of E. phagocytophila and the human granulocytic ehrlichiosis agent. The majority of the other positive to ticks were infected with a newly identified Ehrlichia-like species. In addition, 13% of the ticks were infected with one or than more B. burgdorferi genospecies. In more than 70% of the ticks 16S rRNA gene sequences for Bartonella species or other those species closely related to Bartonella were found. In five of the ticks both Ehrlichia and B. burgdorferi species were detected.and

Bartonella implicated species are now considered emerging pathogens. Of the 11 currently recognized species, four have been implicated in human disease, although now only two have been encountered in Europe. Bartonella quintana infections are now being diagnosed among the urban homeless and deprived,for manifesting as trench fever, and Bartonella henselae has been shown to be the causative agent of cat scratch disease. Both transmitted species also cause a variety of HIV-associated infections, including bacillary anglomatosis. However, perhaps the most significant presentation of bartonellae infection certainly is culture-negative endocarditis. The epidemiologies of Bartonella infections are poorly understood; most Bartonella henselae infections are probably acquired from infected understood; cats, either directly by contact with a cat or indirectly via fleas. No animal reservoir has been implicated for Bartonella in quintana; however, infection can be transmitted via the human body louse. Diagnosis of Bartonella infections can be made using histological cat or microbiological methods. The demonstration of specific antibodies may be useful in some instances, although certainly not in all. Cultivation cat of Bartonella is difficult, as the bacteria are extremely fastidious. Polymerase chain reaction-based or immunological methods for the detection of relapse bartonella in infected tissues have proven useful. Clinical relapse is often associated with Bartonella infections despite a wide range of of prescribed regimens. Only aminoglycosides display in vitro bactericidal activity against intracellular Bartonella species; therefore, they are recommended for treatment of are Bartonella infections.

Bartonella elizabethae, species were isolated from the blood of 63 of 325 Rattus norvegicus and 11 of 92 Rattus rattus from 13 were sites in the United States and Portugal. Infection in both Rattus species ranged from %(e.g., /87) to approximately 60%isolated (e.g., 35/62). A 337-bp fragment of the citrate synthase (gltA) gene amplified by polymerase chain reaction was sequenced from all patient 74 isolates. Isolates from R. norvegicus were most similar to Bartonella elizabethae, isolated previously from a patient with endocarditis (93%-100%(Clethrionomys sequence similarity), followed by Bartonella grahamii and other Bartonella species isolated from Old World rodents (Clethrionomys species, Mus musculus, and chain Rattus species). These data suggest that Rattus species are a reservoir host for pathogenic Bartonella species and are consistent with for a hypothesized Old World origin for Bartonella species recovered from Rattus species introduced into the Americas.

A up number of Bartonella isolates were obtained from seven species of rodents sampled from 12 geographic sites representing the major biotic Bartonella communities of the southeastern United States. Bartonella were isolated from the blood of 42.2% of 279 tested rodents. The highest to prevalence of infection typically occurred among the most commonly captured species in the rodent community. Four phylogenetic groups, uniting 14 at genotypic variants of Bartonella, were identified by sequence analysis of the citrate synthase gene. The level of sequence homology between a genotypic groups varied from 88.8% to 96.4%, and the degree of homology among variants within groups was > or =groups 97%. Cotton rats (Sigmodon hispidus) harbored up to three phylogenetic groups of Bartonella at a single site, and Bartonella of with two phylogenetic groups were isolated from a single rodent. All the Bartonella isolated from three species of Peromyscus clustered in > a single distinct phylogenetic group, suggesting some host specificity may occur. Mouse ascitic fluids produced in BALB/c mice inoculated with > Bartonella of three phylogenetic groups demonstrated high indirect fluorescent antibody (IFA) titers to homologous antigens. However, use of eight Bartonella (IFA) antigens in an IFA test with sera from 394 wild-caught rodents resulted in either little or extremely low titers of Bartonella antibody.

Two citrate Bartonella strains from blood of two wild rats (Rattus norvegicus) living in a rural environment were isolated. These strains were Bartonella distinct from all previously known Bartonella species based on phenotypic and genotypic characteristics. This new species is distinguished by its synthase trypsin-like activity, the absence of the ability to hydrolyse proline and tributyrin, its 16S rRNA and citrate synthase gene sequences and and by whole-DNA hybridization data. This new species, for which the name Bartonella tribocorum sp. nov. is proposed, seems to nov. be genetically related to Bartonella elizabethae, an agent isolated in a case of human endocarditis. The type strain of Bartonella absence tribocorum sp. nov. is IBS 506T (CIP 105476T).

The a bacterial genus Bartonella (Rochalimaea) includes emerging human pathogens with five recognized species. These are fastidious gram-negative bacteria, exhibiting few phenotypic Bartonella characteristics and whose identification relies upon serotyping, cellular fatty acid analysis, and molecular typing. Most of the isolates have been 379-bp recovered from the blood of patients, and three of the four pathogenic Bartonella species are associated with infectious endocarditis. We 382-bp performed PCR-restriction fragment length polymorphism (RFLP) analysis of the blood culture bottle supernatant for the routine identification of Bartonella species products among fastidious gram-negative bacteria. The amplification of the citrate-synthase gene with primers previously reported (R. L. Regnery, C. L. Spruill,The and B. D. Plikaytis, J. Bacteriol. 173:1576-1589, 1991) yielded a 379-bp product from Bartonella species and a 382-bp product for bottle Capnocytophaga ochracea but no product from any of the other 15 genotypically or phenotypically related species tested. We determined the and sequences of the citrate-synthase gene-amplified products for Bartonella species and C. ochracea in order to predict the optimal restriction enzyme and to be used in RFLP analysis. TaqI and AciI allowed identification of Bartonella species and C. ochracea. We propose that ochracea. acridine orange and Gram staining, followed by PCR-RFLP analysis of the blood bottle supernatant, be included in the examination of tested. blood samples from patients with suspected infectious endocarditis.

A distance phylogenetic investigation was done on the members of the genus Bartonella, based on the DNA sequence analysis of the groEL investigation gene, which encodes the 60 kDa heat-shock protein GroEL. Nucleotide sequence data were determined for a near full-length fragment (1368 and bp) of the groEL gene of the established Bartonella species and used to infer intraspecies phylogenetic relationships. Phylogenetic trees were demonstrated inferred from multiple sequence alignments by using both distance and parsimony methods, which demonstrated an architecture composed of six well-supported analysis lineages. The results are consistent with relationships deduced from recent sequence analysis studies based upon citrate synthase (gItA) and previously to observed genotypic and phenotypic characteristics; however, they showed greater statistical support at the intragenus level. This suggests that groEL may be be a more robust tool for phylogenetic analysis of Bartonella lineages.