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At least 1,711 records · Page 95Linked to original sources
PubMed1994

[A new bacterium: Rochalimaea].

Originally limited to trench fever, infections due to Rochalimaea now comprise manifestations particular to patients with human immunodeficiency virus (bacillary angiomatosis and hepatic peliosis), but also manifestations as diverse as isolated fever, septicaemia, endocarditis, lymphocytic meningitis, or central neurological disorders, in immunodepressed or immunocompetent subjects. The involvement of Rochalimaea in cat-scratch fever remains debated. Microbiological analysis used for diagnosis has been modified to allow isolation of these new bacteria, whose culture is slow and difficult, in the course of the above-cited clinical manifestations, which should further extend the range of Rochalimaea infections.

Alphaproteobacteria↗
PubMed1994

Immunoelectrophoretic characterization and cross-reactivity of Rochalimaea henselae, Rochalimaea quintana and Afipia felis.

The soluble antigens of Rochalimaea henselae, Rochalimaea quintana and Afipia felis were characterized by crossed immunoelectrophoresis using bacterial sonicates as antigens against pooled hyperimmune rabbit sera. A precipitin pattern was drawn for each bacterium and shown to be reproducible and stable even when normal or preimmune rabbit serum was incorporated in the intermediate gel. By this technique 56 antigens were identified from R. henselae, 49 from R. quintana, and 39 from A. felis. The serological cross-reaction between R. henselae, R. quintana and A. felis, and between these 3 bacteria and 32 pathogenic bacteria was analysed by rocket-line immunoelectrophoresis, crossed-line immunoelectrophoresis, and tandem-crossed electrophoresis. It was concluded that (i) 4-7 antigens distinguish R. henselae, R. quintana and A. felis from each other, (ii) both Gram-positive and Gram-negative bacteria cross-react with R. henselae, R. quintana and A. felis antisera, (iii) the cross-reacting antigens of Gram-negative bacteria have both precipitating and non-precipitating specificities, whereas Gram-positive bacteria have mainly non-precipitating specificities, (iv) the cross-reacting antigens are common to several species, and (v) fewer cross-reacting antigens are found in phylogenetically disparate species than in more closely related species.

Angiomatosis, Bacillary↗
PubMed1994

Cervical lymphadenitis in infants and children.

One of the more common cervical lesions seen in children is cervical lymphadenitis. Pediatricians handle the vast majority of these children who present with an acute infection. The pediatric surgeon becomes involved only when the presumptive infection does not respond to antibiotic therapy, or if the lump becomes chronic and persists for weeks or months. In this situation the specter of malignancy looms, but benign causes still predominate. The infectious agents range from common bacteria such as staphylococci and hematologic staphylococci to atypical mycobacterium, fungi, and other much less common organisms. A broad discussion of the numerous causes of cervical lymphadenitis is presented together with a pragmatic diagnostic and therapeutic approach.

Cat-Scratch Disease↗
PubMed1993

[Bacillary angiomatosis].

In a 78 years old patient with chronic lymphoid leukemia, diabetes mellitus a cat scratch induced disseminated angiomatous papules were observed. In the lesions great number of bacilluses were observed with light -and electron microscope. As a result of antibiotic treatment the lesions regressed without trace. This opportunist infection resulting general symptoms as well, may be regarded as a cutaneous manifestation of immunodeficiency. The adequate antibiotic treatment depends on the exact diagnosis.

Aged↗
PubMed1997

Immunopurified extracellular Bartonella henselae antigen for detecting specific antibodies by enzyme immunoassay.

Protein antigens of Bartonella henselae bacterial sonicate supernatant and concentrated cell-free culture filtrate were examined by SDS-PAGE. The sonicate supernatant gave 38 bands and the culture filtrate at least 21, of which 18 were of bacterial origin. Immunoblotting against 13 monoclonal antibodies obtained from mice infected with live B. henselae showed that 10 of these antibodies reacted with a narrow 225 kDa band and varying smears of bands ranging from 36 to 240 kDa in the sonicate, but only with a single 200 kDa band in the culture filtrate. Testing of pre- and post-infection rabbit sera in immunoblotting against culture filtrate demonstrated that the 200 kDa component gave the most prominent specific reaction with post-infection sera. The 200 kDa antigen was isolated by immunoaffinity chromatography of concentrated culture filtrate, and its molecular size determined by size-exclusion chromatography as > 1000 kDa. The immunopurified antigen was compared with bacterial sonicate as coating antigen in EIA for determining humoral immune responses in rabbits inoculated with live B. henselae. The two antigens gave almost identical results for IgM and IgG responses. The specificity of the immunopurified antigen was tested in EIA against hyperimmune rabbit sera and sera of rabbits inoculated with live B. henselae, B. quintana and Afipia felis. Only the hyperimmune serum against B. henselae and the sera of the rabbits inoculated with live B. henselae reacted with the immunopurified antigen, whereas the B. henselae sonicate cross-reacted with hyperimmune and post-infection sera of rabbits inoculated with B. quintana and A. felis.

Animals↗